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annotate rust/rhg/src/error.rs @ 45923:ead435aa5294

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rhg: add a `debugrequirements` subcommand For now it only prints the contents of `.hg/requires` as-is, without parsing. Differential Revision: https://phab.mercurial-scm.org/D9397
author Simon Sapin <simon-commits@exyr.org>
date Tue, 24 Nov 2020 15:11:58 +0100
parents 33ded2d3f4fc
children a2eda1ff22aa
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 use crate::exitcode;
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2 use crate::ui::UiError;
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3 use hg::operations::{FindRootError, FindRootErrorKind};
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4 use hg::utils::files::get_bytes_from_path;
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5 use std::convert::From;
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6 use std::path::PathBuf;
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7
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8 /// The kind of command error
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9 #[derive(Debug)]
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10 pub enum CommandErrorKind {
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11 /// The root of the repository cannot be found
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12 RootNotFound(PathBuf),
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13 /// The current directory cannot be found
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14 CurrentDirNotFound(std::io::Error),
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15 /// Error while reading or writing a file
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16 // TODO: add the file name/path?
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17 FileError(std::io::Error),
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18 /// The standard output stream cannot be written to
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19 StdoutError,
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20 /// The standard error stream cannot be written to
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21 StderrError,
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22 /// The command aborted
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23 Abort(Option<Vec<u8>>),
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24 /// A mercurial capability as not been implemented.
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25 Unimplemented,
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26 }
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27
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28 impl CommandErrorKind {
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29 pub fn get_exit_code(&self) -> exitcode::ExitCode {
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30 match self {
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31 CommandErrorKind::RootNotFound(_) => exitcode::ABORT,
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32 CommandErrorKind::CurrentDirNotFound(_) => exitcode::ABORT,
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33 CommandErrorKind::FileError(_) => exitcode::ABORT,
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34 CommandErrorKind::StdoutError => exitcode::ABORT,
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35 CommandErrorKind::StderrError => exitcode::ABORT,
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36 CommandErrorKind::Abort(_) => exitcode::ABORT,
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37 CommandErrorKind::Unimplemented => exitcode::UNIMPLEMENTED_COMMAND,
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38 }
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39 }
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40
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41 /// Return the message corresponding to the error kind if any
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42 pub fn get_error_message_bytes(&self) -> Option<Vec<u8>> {
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43 match self {
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44 // TODO use formating macro
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45 CommandErrorKind::RootNotFound(path) => {
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46 let bytes = get_bytes_from_path(path);
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47 Some(
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48 [
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49 b"abort: no repository found in '",
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50 bytes.as_slice(),
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51 b"' (.hg not found)!\n",
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52 ]
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53 .concat(),
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54 )
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55 }
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56 // TODO use formating macro
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57 CommandErrorKind::CurrentDirNotFound(e) => Some(
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58 [
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59 b"abort: error getting current working directory: ",
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60 e.to_string().as_bytes(),
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61 b"\n",
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62 ]
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63 .concat(),
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64 ),
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65 CommandErrorKind::Abort(message) => message.to_owned(),
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66 _ => None,
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67 }
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68 }
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69 }
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70
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71 /// The error type for the Command trait
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72 #[derive(Debug)]
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73 pub struct CommandError {
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74 pub kind: CommandErrorKind,
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75 }
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76
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77 impl CommandError {
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78 /// Exist the process with the corresponding exit code.
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79 pub fn exit(&self) {
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80 std::process::exit(self.kind.get_exit_code())
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81 }
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82
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83 /// Return the message corresponding to the command error if any
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84 pub fn get_error_message_bytes(&self) -> Option<Vec<u8>> {
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85 self.kind.get_error_message_bytes()
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86 }
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87 }
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88
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89 impl From<CommandErrorKind> for CommandError {
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90 fn from(kind: CommandErrorKind) -> Self {
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91 CommandError { kind }
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92 }
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93 }
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94
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95 impl From<UiError> for CommandError {
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96 fn from(error: UiError) -> Self {
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97 CommandError {
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98 kind: match error {
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99 UiError::StdoutError(_) => CommandErrorKind::StdoutError,
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100 UiError::StderrError(_) => CommandErrorKind::StderrError,
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101 },
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102 }
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103 }
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104 }
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105
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106 impl From<FindRootError> for CommandError {
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107 fn from(err: FindRootError) -> Self {
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108 match err.kind {
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109 FindRootErrorKind::RootNotFound(path) => CommandError {
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110 kind: CommandErrorKind::RootNotFound(path),
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111 },
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112 FindRootErrorKind::GetCurrentDirError(e) => CommandError {
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113 kind: CommandErrorKind::CurrentDirNotFound(e),
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114 },
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115 }
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116 }
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117 }