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annotate rust/rhg/src/error.rs @ 45542:33ded2d3f4fc

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rhg: add a limited `rhg cat -r` subcommand It only supports revision specification (rev or full hash) and the list of files to cat. Differential Revision: https://phab.mercurial-scm.org/D9052
author Antoine Cezar <antoine.cezar@octobus.net>
date Tue, 15 Sep 2020 16:51:11 +0200
parents fbc373b7cbc3
children ead435aa5294
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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 /// The standard output stream cannot be written to
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16 StdoutError,
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17 /// The standard error stream cannot be written to
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18 StderrError,
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19 /// The command aborted
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20 Abort(Option<Vec<u8>>),
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21 /// A mercurial capability as not been implemented.
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22 Unimplemented,
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23 }
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24
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25 impl CommandErrorKind {
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26 pub fn get_exit_code(&self) -> exitcode::ExitCode {
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27 match self {
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28 CommandErrorKind::RootNotFound(_) => exitcode::ABORT,
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29 CommandErrorKind::CurrentDirNotFound(_) => exitcode::ABORT,
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30 CommandErrorKind::StdoutError => exitcode::ABORT,
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31 CommandErrorKind::StderrError => exitcode::ABORT,
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32 CommandErrorKind::Abort(_) => exitcode::ABORT,
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33 CommandErrorKind::Unimplemented => exitcode::UNIMPLEMENTED_COMMAND,
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34 }
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35 }
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36
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37 /// Return the message corresponding to the error kind if any
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38 pub fn get_error_message_bytes(&self) -> Option<Vec<u8>> {
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39 match self {
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40 // TODO use formating macro
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41 CommandErrorKind::RootNotFound(path) => {
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42 let bytes = get_bytes_from_path(path);
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43 Some(
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44 [
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45 b"abort: no repository found in '",
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46 bytes.as_slice(),
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47 b"' (.hg not found)!\n",
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48 ]
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49 .concat(),
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50 )
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51 }
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52 // TODO use formating macro
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53 CommandErrorKind::CurrentDirNotFound(e) => Some(
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54 [
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55 b"abort: error getting current working directory: ",
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56 e.to_string().as_bytes(),
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57 b"\n",
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58 ]
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59 .concat(),
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60 ),
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61 CommandErrorKind::Abort(message) => message.to_owned(),
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62 _ => None,
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63 }
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64 }
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65 }
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66
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67 /// The error type for the Command trait
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68 #[derive(Debug)]
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69 pub struct CommandError {
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70 pub kind: CommandErrorKind,
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71 }
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72
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73 impl CommandError {
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74 /// Exist the process with the corresponding exit code.
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75 pub fn exit(&self) {
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76 std::process::exit(self.kind.get_exit_code())
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77 }
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78
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79 /// Return the message corresponding to the command error if any
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80 pub fn get_error_message_bytes(&self) -> Option<Vec<u8>> {
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81 self.kind.get_error_message_bytes()
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82 }
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83 }
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84
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85 impl From<CommandErrorKind> for CommandError {
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86 fn from(kind: CommandErrorKind) -> Self {
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87 CommandError { kind }
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88 }
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89 }
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90
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91 impl From<UiError> for CommandError {
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92 fn from(error: UiError) -> Self {
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93 CommandError {
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94 kind: match error {
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95 UiError::StdoutError(_) => CommandErrorKind::StdoutError,
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96 UiError::StderrError(_) => CommandErrorKind::StderrError,
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97 },
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98 }
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99 }
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100 }
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101
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102 impl From<FindRootError> for CommandError {
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103 fn from(err: FindRootError) -> Self {
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104 match err.kind {
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105 FindRootErrorKind::RootNotFound(path) => CommandError {
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106 kind: CommandErrorKind::RootNotFound(path),
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107 },
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108 FindRootErrorKind::GetCurrentDirError(e) => CommandError {
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109 kind: CommandErrorKind::CurrentDirNotFound(e),
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110 },
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111 }
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112 }
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113 }