mercurial-scm/hg: rust/hg-core/src/vfs.rs annotate

annotate rust/hg-core/src/vfs.rs @ 52167:7be39c5110c9

hg-core: add a complete VFS This will be used from Python in a later change. More changes are needed in hg-core and rhg to properly clean up the APIs of the old VFS implementation but it can be done when the dust settles and we start adding more functionality to the pure Rust VFS.

author	Rapha?l Gom?s <rgomes@octobus.net>
date	Mon, 29 Jul 2024 20:47:43 +0200
parents	46c68c0fe137
children	067ec8574c33

rev	line source
47952 9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	1 use crate::errors::{HgError, IoErrorContext, IoResultExt};
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	2 use crate::exit_codes;
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	3 use dyn_clone::DynClone;
47955 e834b79def74 rust: Switch to the memmap2-rs crate Simon Sapin <simon.sapin@octobus.net> parents: 47952 diff changeset	4 use memmap2::{Mmap, MmapOptions};
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	5 use rand::distributions::DistString;
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	6 use rand_distr::Alphanumeric;
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	7 use std::fs::{File, OpenOptions};
48418 abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	8 use std::io::{ErrorKind, Write};
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	9 use std::os::unix::fs::{MetadataExt, PermissionsExt};
47952 9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	10 use std::path::{Path, PathBuf};
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	11 use std::sync::OnceLock;
47952 9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	12
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	13 /// Filesystem access abstraction for the contents of a given "base" diretory
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	14 #[derive(Clone)]
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	15 pub struct VfsImpl {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	16 pub(crate) base: PathBuf,
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	17 pub readonly: bool,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	18 pub mode: Option<u32>,
47952 9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	19 }
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	20
48199 9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	21 struct FileNotFound(std::io::Error, PathBuf);
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	22
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	23 /// Store the umask for the whole process since it's expensive to get.
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	24 static UMASK: OnceLock<u32> = OnceLock::new();
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	25
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	26 fn get_umask() -> u32 {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	27 *UMASK.get_or_init(\|\| unsafe {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	28 // TODO is there any way of getting the umask without temporarily
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	29 // setting it? Doesn't this affect all threads in this tiny window?
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	30 let mask = libc::umask(0);
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	31 libc::umask(mask);
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	32 mask & 0o777
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	33 })
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	34 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	35
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	36 /// Return the (unix) mode with which we will create/fix files
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	37 fn get_mode(base: impl AsRef<Path>) -> Option<u32> {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	38 match base.as_ref().metadata() {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	39 Ok(meta) => {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	40 // files in .hg/ will be created using this mode
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	41 let mode = meta.mode();
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	42 // avoid some useless chmods
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	43 if (0o777 & !get_umask()) == (0o777 & mode) {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	44 None
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	45 } else {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	46 Some(mode)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	47 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	48 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	49 Err(_) => None,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	50 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	51 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	52
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	53 impl VfsImpl {
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	54 pub fn new(base: PathBuf, readonly: bool) -> Self {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	55 let mode = get_mode(&base);
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	56 Self {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	57 base,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	58 readonly,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	59 mode,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	60 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	61 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	62
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	63 // XXX these methods are probably redundant with VFS trait?
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	64
47952 9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	65 pub fn join(&self, relative_path: impl AsRef<Path>) -> PathBuf {
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	66 self.base.join(relative_path)
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	67 }
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	68
48345 d5a91701f7dc rhg: Fix status desambiguation of symlinks and executable files Simon Sapin <simon.sapin@octobus.net> parents: 48199 diff changeset	69 pub fn symlink_metadata(
d5a91701f7dc rhg: Fix status desambiguation of symlinks and executable files Simon Sapin <simon.sapin@octobus.net> parents: 48199 diff changeset	70 &self,
d5a91701f7dc rhg: Fix status desambiguation of symlinks and executable files Simon Sapin <simon.sapin@octobus.net> parents: 48199 diff changeset	71 relative_path: impl AsRef<Path>,
d5a91701f7dc rhg: Fix status desambiguation of symlinks and executable files Simon Sapin <simon.sapin@octobus.net> parents: 48199 diff changeset	72 ) -> Result<std::fs::Metadata, HgError> {
d5a91701f7dc rhg: Fix status desambiguation of symlinks and executable files Simon Sapin <simon.sapin@octobus.net> parents: 48199 diff changeset	73 let path = self.join(relative_path);
d5a91701f7dc rhg: Fix status desambiguation of symlinks and executable files Simon Sapin <simon.sapin@octobus.net> parents: 48199 diff changeset	74 std::fs::symlink_metadata(&path).when_reading_file(&path)
d5a91701f7dc rhg: Fix status desambiguation of symlinks and executable files Simon Sapin <simon.sapin@octobus.net> parents: 48199 diff changeset	75 }
d5a91701f7dc rhg: Fix status desambiguation of symlinks and executable files Simon Sapin <simon.sapin@octobus.net> parents: 48199 diff changeset	76
d5a91701f7dc rhg: Fix status desambiguation of symlinks and executable files Simon Sapin <simon.sapin@octobus.net> parents: 48199 diff changeset	77 pub fn read_link(
d5a91701f7dc rhg: Fix status desambiguation of symlinks and executable files Simon Sapin <simon.sapin@octobus.net> parents: 48199 diff changeset	78 &self,
d5a91701f7dc rhg: Fix status desambiguation of symlinks and executable files Simon Sapin <simon.sapin@octobus.net> parents: 48199 diff changeset	79 relative_path: impl AsRef<Path>,
d5a91701f7dc rhg: Fix status desambiguation of symlinks and executable files Simon Sapin <simon.sapin@octobus.net> parents: 48199 diff changeset	80 ) -> Result<PathBuf, HgError> {
d5a91701f7dc rhg: Fix status desambiguation of symlinks and executable files Simon Sapin <simon.sapin@octobus.net> parents: 48199 diff changeset	81 let path = self.join(relative_path);
d5a91701f7dc rhg: Fix status desambiguation of symlinks and executable files Simon Sapin <simon.sapin@octobus.net> parents: 48199 diff changeset	82 std::fs::read_link(&path).when_reading_file(&path)
d5a91701f7dc rhg: Fix status desambiguation of symlinks and executable files Simon Sapin <simon.sapin@octobus.net> parents: 48199 diff changeset	83 }
d5a91701f7dc rhg: Fix status desambiguation of symlinks and executable files Simon Sapin <simon.sapin@octobus.net> parents: 48199 diff changeset	84
47952 9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	85 pub fn read(
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	86 &self,
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	87 relative_path: impl AsRef<Path>,
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	88 ) -> Result<Vec<u8>, HgError> {
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	89 let path = self.join(relative_path);
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	90 std::fs::read(&path).when_reading_file(&path)
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	91 }
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	92
49485 ffd4b1f1c9cb rhg: add sparse support Rapha?l Gom?s <rgomes@octobus.net> parents: 48418 diff changeset	93 /// Returns `Ok(None)` if the file does not exist.
ffd4b1f1c9cb rhg: add sparse support Rapha?l Gom?s <rgomes@octobus.net> parents: 48418 diff changeset	94 pub fn try_read(
ffd4b1f1c9cb rhg: add sparse support Rapha?l Gom?s <rgomes@octobus.net> parents: 48418 diff changeset	95 &self,
ffd4b1f1c9cb rhg: add sparse support Rapha?l Gom?s <rgomes@octobus.net> parents: 48418 diff changeset	96 relative_path: impl AsRef<Path>,
ffd4b1f1c9cb rhg: add sparse support Rapha?l Gom?s <rgomes@octobus.net> parents: 48418 diff changeset	97 ) -> Result<Option<Vec<u8>>, HgError> {
ffd4b1f1c9cb rhg: add sparse support Rapha?l Gom?s <rgomes@octobus.net> parents: 48418 diff changeset	98 match self.read(relative_path) {
ffd4b1f1c9cb rhg: add sparse support Rapha?l Gom?s <rgomes@octobus.net> parents: 48418 diff changeset	99 Err(e) => match &e {
ffd4b1f1c9cb rhg: add sparse support Rapha?l Gom?s <rgomes@octobus.net> parents: 48418 diff changeset	100 HgError::IoError { error, .. } => match error.kind() {
49914 58074252db3c rust: run `cargo clippy` Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	101 ErrorKind::NotFound => Ok(None),
49485 ffd4b1f1c9cb rhg: add sparse support Rapha?l Gom?s <rgomes@octobus.net> parents: 48418 diff changeset	102 _ => Err(e),
ffd4b1f1c9cb rhg: add sparse support Rapha?l Gom?s <rgomes@octobus.net> parents: 48418 diff changeset	103 },
ffd4b1f1c9cb rhg: add sparse support Rapha?l Gom?s <rgomes@octobus.net> parents: 48418 diff changeset	104 _ => Err(e),
ffd4b1f1c9cb rhg: add sparse support Rapha?l Gom?s <rgomes@octobus.net> parents: 48418 diff changeset	105 },
ffd4b1f1c9cb rhg: add sparse support Rapha?l Gom?s <rgomes@octobus.net> parents: 48418 diff changeset	106 Ok(v) => Ok(Some(v)),
ffd4b1f1c9cb rhg: add sparse support Rapha?l Gom?s <rgomes@octobus.net> parents: 48418 diff changeset	107 }
ffd4b1f1c9cb rhg: add sparse support Rapha?l Gom?s <rgomes@octobus.net> parents: 48418 diff changeset	108 }
ffd4b1f1c9cb rhg: add sparse support Rapha?l Gom?s <rgomes@octobus.net> parents: 48418 diff changeset	109
48199 9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	110 fn mmap_open_gen(
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	111 &self,
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	112 relative_path: impl AsRef<Path>,
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	113 ) -> Result<Result<Mmap, FileNotFound>, HgError> {
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	114 let path = self.join(relative_path);
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	115 let file = match std::fs::File::open(&path) {
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	116 Err(err) => {
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	117 if let ErrorKind::NotFound = err.kind() {
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	118 return Ok(Err(FileNotFound(err, path)));
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	119 };
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	120 return (Err(err)).when_reading_file(&path);
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	121 }
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	122 Ok(file) => file,
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	123 };
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	124 // Safety is "enforced" by locks and assuming other processes are
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	125 // well-behaved. If any misbehaving or malicious process does touch
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	126 // the index, it could lead to corruption. This is inherent
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	127 // to file-based `mmap`, though some platforms have some ways of
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	128 // mitigating.
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	129 // TODO linux: set the immutable flag with `chattr(1)`?
48199 9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	130 let mmap = unsafe { MmapOptions::new().map(&file) }
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	131 .when_reading_file(&path)?;
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	132 Ok(Ok(mmap))
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	133 }
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	134
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	135 pub fn mmap_open_opt(
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	136 &self,
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	137 relative_path: impl AsRef<Path>,
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	138 ) -> Result<Option<Mmap>, HgError> {
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	139 self.mmap_open_gen(relative_path).map(\|res\| res.ok())
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	140 }
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	141
47952 9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	142 pub fn mmap_open(
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	143 &self,
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	144 relative_path: impl AsRef<Path>,
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	145 ) -> Result<Mmap, HgError> {
48199 9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	146 match self.mmap_open_gen(relative_path)? {
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	147 Err(FileNotFound(err, path)) => Err(err).when_reading_file(&path),
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	148 Ok(res) => Ok(res),
9d0e5629cfbf rhg: do not fail when the repo is empty Arseniy Alekseyev <aalekseyev@janestreet.com> parents: 47955 diff changeset	149 }
47952 9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	150 }
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	151
48417 5734b03ecf3e rhg: Initial repository locking Simon Sapin <simon.sapin@octobus.net> parents: 48345 diff changeset	152 #[cfg(unix)]
5734b03ecf3e rhg: Initial repository locking Simon Sapin <simon.sapin@octobus.net> parents: 48345 diff changeset	153 pub fn create_symlink(
5734b03ecf3e rhg: Initial repository locking Simon Sapin <simon.sapin@octobus.net> parents: 48345 diff changeset	154 &self,
5734b03ecf3e rhg: Initial repository locking Simon Sapin <simon.sapin@octobus.net> parents: 48345 diff changeset	155 relative_link_path: impl AsRef<Path>,
5734b03ecf3e rhg: Initial repository locking Simon Sapin <simon.sapin@octobus.net> parents: 48345 diff changeset	156 target_path: impl AsRef<Path>,
5734b03ecf3e rhg: Initial repository locking Simon Sapin <simon.sapin@octobus.net> parents: 48345 diff changeset	157 ) -> Result<(), HgError> {
5734b03ecf3e rhg: Initial repository locking Simon Sapin <simon.sapin@octobus.net> parents: 48345 diff changeset	158 let link_path = self.join(relative_link_path);
5734b03ecf3e rhg: Initial repository locking Simon Sapin <simon.sapin@octobus.net> parents: 48345 diff changeset	159 std::os::unix::fs::symlink(target_path, &link_path)
48418 abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	160 .when_writing_file(&link_path)
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	161 }
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	162
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	163 /// Write `contents` into a temporary file, then rename to `relative_path`.
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	164 /// This makes writing to a file "atomic": a reader opening that path will
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	165 /// see either the previous contents of the file or the complete new
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	166 /// content, never a partial write.
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	167 pub fn atomic_write(
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	168 &self,
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	169 relative_path: impl AsRef<Path>,
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	170 contents: &[u8],
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	171 ) -> Result<(), HgError> {
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	172 let mut tmp = tempfile::NamedTempFile::new_in(&self.base)
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	173 .when_writing_file(&self.base)?;
48418 abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	174 tmp.write_all(contents)
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	175 .and_then(\|()\| tmp.flush())
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	176 .when_writing_file(tmp.path())?;
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	177 let path = self.join(relative_path);
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	178 tmp.persist(&path)
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	179 .map_err(\|e\| e.error)
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	180 .when_writing_file(&path)?;
abeae090ce67 rust: Add Vfs::write_atomic Simon Sapin <simon.sapin@octobus.net> parents: 48417 diff changeset	181 Ok(())
48417 5734b03ecf3e rhg: Initial repository locking Simon Sapin <simon.sapin@octobus.net> parents: 48345 diff changeset	182 }
47952 9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	183 }
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	184
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	185 fn fs_metadata(
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	186 path: impl AsRef<Path>,
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	187 ) -> Result<Option<std::fs::Metadata>, HgError> {
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	188 let path = path.as_ref();
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	189 match std::fs::metadata(path) {
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	190 Ok(meta) => Ok(Some(meta)),
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	191 Err(error) => match error.kind() {
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	192 // TODO: when we require a Rust version where `NotADirectory` is
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	193 // stable, invert this logic and return None for it and `NotFound`
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	194 // and propagate any other error.
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	195 ErrorKind::PermissionDenied => Err(error).with_context(\|\| {
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	196 IoErrorContext::ReadingMetadata(path.to_owned())
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	197 }),
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	198 _ => Ok(None),
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	199 },
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	200 }
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	201 }
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	202
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	203 /// Writable file object that atomically updates a file
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	204 ///
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	205 /// All writes will go to a temporary copy of the original file. Call
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	206 /// [`Self::close`] when you are done writing, and [`Self`] will rename
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	207 /// the temporary copy to the original name, making the changes
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	208 /// visible. If the object is destroyed without being closed, all your
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	209 /// writes are discarded.
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	210 pub struct AtomicFile {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	211 /// The temporary file to write to
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	212 fp: std::fs::File,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	213 /// Path of the temp file
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	214 temp_path: PathBuf,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	215 /// Used when stat'ing the file, is useful only if the target file is
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	216 /// guarded by any lock (e.g. repo.lock or repo.wlock).
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	217 check_ambig: bool,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	218 /// Path of the target file
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	219 target_name: PathBuf,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	220 /// Whether the file is open or not
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	221 is_open: bool,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	222 }
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	223
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	224 impl AtomicFile {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	225 pub fn new(
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	226 fp: std::fs::File,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	227 check_ambig: bool,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	228 temp_name: PathBuf,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	229 target_name: PathBuf,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	230 ) -> Self {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	231 Self {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	232 fp,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	233 check_ambig,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	234 temp_path: temp_name,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	235 target_name,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	236 is_open: true,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	237 }
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	238 }
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	239
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	240 /// Write `buf` to the temporary file
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	241 pub fn write_all(&mut self, buf: &[u8]) -> Result<(), std::io::Error> {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	242 self.fp.write_all(buf)
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	243 }
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	244
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	245 fn target(&self) -> PathBuf {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	246 self.temp_path
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	247 .parent()
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	248 .expect("should not be at the filesystem root")
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	249 .join(&self.target_name)
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	250 }
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	251
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	252 /// Close the temporary file and rename to the target
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	253 pub fn close(mut self) -> Result<(), std::io::Error> {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	254 self.fp.flush()?;
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	255 let target = self.target();
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	256 if self.check_ambig {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	257 if let Ok(stat) = std::fs::metadata(&target) {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	258 std::fs::rename(&self.temp_path, &target)?;
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	259 let new_stat = std::fs::metadata(&target)?;
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	260 let ctime = new_stat.ctime();
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	261 let is_ambiguous = ctime == stat.ctime();
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	262 if is_ambiguous {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	263 let advanced =
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	264 filetime::FileTime::from_unix_time(ctime + 1, 0);
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	265 filetime::set_file_times(target, advanced, advanced)?;
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	266 }
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	267 } else {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	268 std::fs::rename(&self.temp_path, target)?;
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	269 }
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	270 } else {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	271 std::fs::rename(&self.temp_path, target).unwrap();
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	272 }
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	273 self.is_open = false;
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	274 Ok(())
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	275 }
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	276 }
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	277
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	278 impl Drop for AtomicFile {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	279 fn drop(&mut self) {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	280 if self.is_open {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	281 std::fs::remove_file(self.target()).ok();
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	282 }
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	283 }
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	284 }
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	285
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	286 /// Abstracts over the VFS to allow for different implementations of the
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	287 /// filesystem layer (like passing one from Python).
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	288 pub trait Vfs: Sync + Send + DynClone {
52157 46c68c0fe137 rust-vfs: add a TODO to remember a decision taken about naming Rapha?l Gom?s <rgomes@octobus.net> parents: 51864 diff changeset	289 // TODO make `open` readonly and make `open_read` an `open_write`
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	290 fn open(&self, filename: &Path) -> Result<std::fs::File, HgError>;
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	291 fn open_read(&self, filename: &Path) -> Result<std::fs::File, HgError>;
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	292 fn open_check_ambig(
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	293 &self,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	294 filename: &Path,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	295 ) -> Result<std::fs::File, HgError>;
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	296 fn create(&self, filename: &Path) -> Result<std::fs::File, HgError>;
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	297 /// Must truncate the new file if exist
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	298 fn create_atomic(
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	299 &self,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	300 filename: &Path,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	301 check_ambig: bool,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	302 ) -> Result<AtomicFile, HgError>;
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	303 fn file_size(&self, file: &File) -> Result<u64, HgError>;
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	304 fn exists(&self, filename: &Path) -> bool;
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	305 fn unlink(&self, filename: &Path) -> Result<(), HgError>;
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	306 fn rename(
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	307 &self,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	308 from: &Path,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	309 to: &Path,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	310 check_ambig: bool,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	311 ) -> Result<(), HgError>;
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	312 fn copy(&self, from: &Path, to: &Path) -> Result<(), HgError>;
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	313 fn base(&self) -> &Path;
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	314 }
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	315
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	316 /// These methods will need to be implemented once `rhg` (and other) non-Python
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	317 /// users of `hg-core` start doing more on their own, like writing to files.
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	318 impl Vfs for VfsImpl {
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	319 fn open(&self, filename: &Path) -> Result<std::fs::File, HgError> {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	320 if self.readonly {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	321 return Err(HgError::abort(
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	322 "write access in a readonly vfs",
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	323 exit_codes::ABORT,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	324 None,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	325 ));
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	326 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	327 // TODO auditpath
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	328 let path = self.base.join(filename);
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	329 copy_in_place_if_hardlink(&path)?;
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	330
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	331 OpenOptions::new()
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	332 .create(false)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	333 .create_new(false)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	334 .write(true)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	335 .read(true)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	336 .open(&path)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	337 .when_writing_file(&path)
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	338 }
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	339
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	340 fn open_read(&self, filename: &Path) -> Result<std::fs::File, HgError> {
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	341 // TODO auditpath
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	342 let path = self.base.join(filename);
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	343 std::fs::File::open(&path).when_reading_file(&path)
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	344 }
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	345
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	346 fn open_check_ambig(
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	347 &self,
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	348 filename: &Path,
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	349 ) -> Result<std::fs::File, HgError> {
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	350 if self.readonly {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	351 return Err(HgError::abort(
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	352 "write access in a readonly vfs",
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	353 exit_codes::ABORT,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	354 None,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	355 ));
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	356 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	357
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	358 let path = self.base.join(filename);
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	359 copy_in_place_if_hardlink(&path)?;
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	360
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	361 // TODO auditpath, check ambig
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	362 OpenOptions::new()
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	363 .write(true)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	364 .read(true) // Can be used for reading to save on `open` calls
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	365 .create(false)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	366 .open(&path)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	367 .when_reading_file(&path)
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	368 }
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	369
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	370 fn create(&self, filename: &Path) -> Result<std::fs::File, HgError> {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	371 if self.readonly {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	372 return Err(HgError::abort(
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	373 "write access in a readonly vfs",
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	374 exit_codes::ABORT,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	375 None,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	376 ));
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	377 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	378 // TODO auditpath
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	379 let path = self.base.join(filename);
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	380 let parent = path.parent().expect("file at root");
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	381 std::fs::create_dir_all(parent).when_writing_file(parent)?;
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	382 // TODO checkambig (wrap File somehow)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	383
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	384 let file = OpenOptions::new()
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	385 .create(true)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	386 .truncate(true)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	387 .write(true)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	388 .read(true)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	389 .open(&path)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	390 .when_writing_file(&path)?;
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	391
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	392 if let Some(mode) = self.mode {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	393 // Creating the file with the right permission (with `.mode()`)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	394 // may not work since umask takes effect for file creation.
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	395 // So we need to fix the permission after creating the file.
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	396 fix_directory_permissions(&self.base, &path, mode)?;
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	397 let perm = std::fs::Permissions::from_mode(mode & 0o666);
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	398 std::fs::set_permissions(&path, perm).when_writing_file(&path)?;
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	399 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	400
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	401 Ok(file)
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	402 }
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	403
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	404 fn create_atomic(
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	405 &self,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	406 _filename: &Path,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	407 _check_ambig: bool,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	408 ) -> Result<AtomicFile, HgError> {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	409 todo!()
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	410 }
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	411
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	412 fn file_size(&self, file: &File) -> Result<u64, HgError> {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	413 Ok(file
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	414 .metadata()
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	415 .map_err(\|e\| {
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	416 HgError::abort(
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	417 format!("Could not get file metadata: {}", e),
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	418 exit_codes::ABORT,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	419 None,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	420 )
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	421 })?
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	422 .size())
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	423 }
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	424
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	425 fn exists(&self, filename: &Path) -> bool {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	426 self.base.join(filename).exists()
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	427 }
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	428
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	429 fn unlink(&self, filename: &Path) -> Result<(), HgError> {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	430 if self.readonly {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	431 return Err(HgError::abort(
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	432 "write access in a readonly vfs",
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	433 exit_codes::ABORT,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	434 None,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	435 ));
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	436 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	437 let path = self.base.join(filename);
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	438 std::fs::remove_file(&path)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	439 .with_context(\|\| IoErrorContext::RemovingFile(path))
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	440 }
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	441
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	442 fn rename(
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	443 &self,
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	444 from: &Path,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	445 to: &Path,
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	446 _check_ambig: bool,
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	447 ) -> Result<(), HgError> {
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	448 if self.readonly {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	449 return Err(HgError::abort(
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	450 "write access in a readonly vfs",
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	451 exit_codes::ABORT,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	452 None,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	453 ));
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	454 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	455 // TODO checkambig
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	456 let from = self.base.join(from);
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	457 let to = self.base.join(to);
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	458 std::fs::rename(&from, &to)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	459 .with_context(\|\| IoErrorContext::RenamingFile { from, to })
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	460 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	461
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	462 fn copy(&self, from: &Path, to: &Path) -> Result<(), HgError> {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	463 // TODO checkambig?
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	464 let from = self.base.join(from);
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	465 let to = self.base.join(to);
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	466 std::fs::copy(&from, &to)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	467 .with_context(\|\| IoErrorContext::CopyingFile { from, to })
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	468 .map(\|_\| ())
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	469 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	470
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	471 fn base(&self) -> &Path {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	472 &self.base
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	473 }
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	474 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	475
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	476 fn fix_directory_permissions(
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	477 base: &Path,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	478 path: &Path,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	479 mode: u32,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	480 ) -> Result<(), HgError> {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	481 let mut ancestors = path.ancestors();
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	482 ancestors.next(); // yields the path itself
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	483
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	484 for ancestor in ancestors {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	485 if ancestor == base {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	486 break;
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	487 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	488 let perm = std::fs::Permissions::from_mode(mode);
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	489 std::fs::set_permissions(ancestor, perm)
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	490 .when_writing_file(ancestor)?;
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	491 }
52167 7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	492 Ok(())
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	493 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	494
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	495 /// Detects whether `path` is a hardlink and does a tmp copy + rename erase
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	496 /// to turn it into its own file. Revlogs are usually hardlinked when doing
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	497 /// a local clone, and we don't want to modify the original repo.
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	498 fn copy_in_place_if_hardlink(path: &Path) -> Result<(), HgError> {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	499 let metadata = path.metadata().when_writing_file(path)?;
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	500 if metadata.nlink() > 0 {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	501 // If it's hardlinked, copy it and rename it back before changing it.
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	502 let tmpdir = path.parent().expect("file at root");
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	503 let name = Alphanumeric.sample_string(&mut rand::thread_rng(), 16);
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	504 let tmpfile = tmpdir.join(name);
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	505 std::fs::create_dir_all(tmpfile.parent().expect("file at root"))
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	506 .with_context(\|\| IoErrorContext::CopyingFile {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	507 from: path.to_owned(),
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	508 to: tmpfile.to_owned(),
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	509 })?;
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	510 std::fs::copy(path, &tmpfile).with_context(\|\| {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	511 IoErrorContext::CopyingFile {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	512 from: path.to_owned(),
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	513 to: tmpfile.to_owned(),
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	514 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	515 })?;
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	516 std::fs::rename(&tmpfile, path).with_context(\|\| {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	517 IoErrorContext::RenamingFile {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	518 from: tmpfile,
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	519 to: path.to_owned(),
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	520 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	521 })?;
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	522 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	523 Ok(())
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	524 }
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	525
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	526 pub fn is_revlog_file(path: impl AsRef<Path>) -> bool {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	527 path.as_ref()
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	528 .extension()
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	529 .map(\|ext\| {
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	530 ["i", "idx", "d", "dat", "n", "nd", "sda"]
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	531 .contains(&ext.to_string_lossy().as_ref())
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	532 })
7be39c5110c9 hg-core: add a complete VFS Rapha?l Gom?s <rgomes@octobus.net> parents: 52157 diff changeset	533 .unwrap_or(false)
51864 db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	534 }
db7dbe6f7bb2 rust: add Vfs trait Rapha?l Gom?s <rgomes@octobus.net> parents: 50274 diff changeset	535
47952 9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	536 pub(crate) fn is_dir(path: impl AsRef<Path>) -> Result<bool, HgError> {
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	537 Ok(fs_metadata(path)?.map_or(false, \|meta\| meta.is_dir()))
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	538 }
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	539
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	540 pub(crate) fn is_file(path: impl AsRef<Path>) -> Result<bool, HgError> {
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	541 Ok(fs_metadata(path)?.map_or(false, \|meta\| meta.is_file()))
9cd35c8c6044 rust: Move VFS code to its own module Simon Sapin <simon.sapin@octobus.net> parents: diff changeset	542 }
50180 be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	543
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	544 /// Returns whether the given `path` is on a network file system.
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	545 /// Taken from `cargo`'s codebase.
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	546 #[cfg(target_os = "linux")]
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	547 pub(crate) fn is_on_nfs_mount(path: impl AsRef<Path>) -> bool {
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	548 use std::ffi::CString;
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	549 use std::mem;
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	550 use std::os::unix::prelude::*;
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	551
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	552 let path = match CString::new(path.as_ref().as_os_str().as_bytes()) {
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	553 Ok(path) => path,
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	554 Err(_) => return false,
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	555 };
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	556
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	557 unsafe {
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	558 let mut buf: libc::statfs = mem::zeroed();
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	559 let r = libc::statfs(path.as_ptr(), &mut buf);
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	560
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	561 r == 0 && buf.f_type as u32 == libc::NFS_SUPER_MAGIC as u32
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	562 }
be019ac8c1e4 dirstate-v2: don't mmap the data file when on NFS Rapha?l Gom?s <rgomes@octobus.net> parents: 49485 diff changeset	563 }
50274 0cc19a53cef4 rust: fix building on macOS (issue6801) Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 50252 diff changeset	564
0cc19a53cef4 rust: fix building on macOS (issue6801) Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 50252 diff changeset	565 /// Similar to what Cargo does; although detecting NFS (or non-local
0cc19a53cef4 rust: fix building on macOS (issue6801) Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 50252 diff changeset	566 /// file systems) _should_ be possible on other operating systems,
0cc19a53cef4 rust: fix building on macOS (issue6801) Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 50252 diff changeset	567 /// we'll just assume that mmap() works there, for now; after all,
0cc19a53cef4 rust: fix building on macOS (issue6801) Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 50252 diff changeset	568 /// _some_ functionality is better than a compile error, i.e. none at
0cc19a53cef4 rust: fix building on macOS (issue6801) Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 50252 diff changeset	569 /// all
0cc19a53cef4 rust: fix building on macOS (issue6801) Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 50252 diff changeset	570 #[cfg(not(target_os = "linux"))]
0cc19a53cef4 rust: fix building on macOS (issue6801) Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 50252 diff changeset	571 pub(crate) fn is_on_nfs_mount(_path: impl AsRef<Path>) -> bool {
0cc19a53cef4 rust: fix building on macOS (issue6801) Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 50252 diff changeset	572 false
0cc19a53cef4 rust: fix building on macOS (issue6801) Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 50252 diff changeset	573 }

Mercurial > public > mercurial-scm > hg

annotate rust/hg-core/src/vfs.rs @ 52167:7be39c5110c9