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annotate rust/rhg/src/commands/root.rs @ 45381:47997afadf08

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rhg: ask the error message from `CommandError` Avoid repeating the display of the same error messages in different commands. Differential Revision: https://phab.mercurial-scm.org/D8865
author Antoine Cezar <antoine.cezar@octobus.net>
date Mon, 20 Jul 2020 18:14:52 +0200
parents 227281e76c22
children 5dbf875b3275
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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513b3ef277a3 rhg: add RootCommand using hg-core FindRoot operation to prepare `hg root`
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1 use crate::commands::Command;
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2 use crate::error::{CommandError, CommandErrorKind};
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3 use crate::ui::Ui;
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4 use hg::operations::{FindRoot, FindRootErrorKind};
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5 use hg::utils::files::get_bytes_from_path;
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6
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7 pub const HELP_TEXT: &str = "
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8 Print the root directory of the current repository.
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9
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10 Returns 0 on success.
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11 ";
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12
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13 pub struct RootCommand<'a> {
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14 ui: &'a Ui,
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15 }
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16
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17 impl<'a> RootCommand<'a> {
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18 pub fn new(ui: &'a Ui) -> Self {
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19 RootCommand { ui }
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20 }
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21 }
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22
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23 impl<'a> Command<'a> for RootCommand<'a> {
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24 fn run(&self) -> Result<(), CommandError> {
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25 let path_buf =
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26 FindRoot::new().run().map_err(|err| match err.kind {
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27 FindRootErrorKind::RootNotFound(path) => {
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28 CommandErrorKind::RootNotFound(path)
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29 }
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30 FindRootErrorKind::GetCurrentDirError(e) => {
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31 CommandErrorKind::CurrentDirNotFound(e)
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32 }
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33 })?;
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34
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35 let bytes = get_bytes_from_path(path_buf);
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36
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37 // TODO use formating macro
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38 self.ui.write_stdout(&[bytes.as_slice(), b"\n"].concat())?;
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39
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40 Ok(())
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41 }
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42 }