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annotate rust/rhg/src/commands/root.rs @ 45358:452ece5654c5

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hg-core: remove the `Operation` trait There is no way to currently define a trait which can both return references to `self` and to passed data, which is what we would need. Generic Associated Types may fix this and allow us to have a unified interface. See: rust #44265 Differential Revision: https://phab.mercurial-scm.org/D8862
author Antoine Cezar <antoine.cezar@octobus.net>
date Wed, 29 Jul 2020 10:08:09 +0200
parents 513b3ef277a3
children 227281e76c22
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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, FindRootError, FindRootErrorKind};
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5 use hg::utils::files::get_bytes_from_path;
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6 use std::path::PathBuf;
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7
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8 pub const HELP_TEXT: &str = "
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9 Print the root directory of the current repository.
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10
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11 Returns 0 on success.
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12 ";
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13
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14 pub struct RootCommand {
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15 ui: Ui,
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16 }
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17
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18 impl RootCommand {
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19 pub fn new() -> Self {
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20 RootCommand { ui: Ui::new() }
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21 }
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22
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23 fn display_found_path(
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24 &self,
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25 path_buf: PathBuf,
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26 ) -> Result<(), CommandError> {
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27 let bytes = get_bytes_from_path(path_buf);
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28
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29 // TODO use formating macro
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30 self.ui.write_stdout(&[bytes.as_slice(), b"\n"].concat())?;
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31
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32 Err(CommandErrorKind::Ok.into())
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33 }
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34
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35 fn display_error(&self, error: FindRootError) -> Result<(), CommandError> {
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36 match error.kind {
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37 FindRootErrorKind::RootNotFound(path) => {
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38 let bytes = get_bytes_from_path(path);
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39
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40 // TODO use formating macro
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41 self.ui.write_stderr(
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42 &[
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43 b"abort: no repository found in '",
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44 bytes.as_slice(),
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45 b"' (.hg not found)!\n",
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46 ]
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47 .concat(),
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48 )?;
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49
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50 Err(CommandErrorKind::RootNotFound.into())
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51 }
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52 FindRootErrorKind::GetCurrentDirError(e) => {
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53 // TODO use formating macro
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54 self.ui.write_stderr(
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55 &[
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56 b"abort: error getting current working directory: ",
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57 e.to_string().as_bytes(),
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58 b"\n",
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59 ]
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60 .concat(),
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61 )?;
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62
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63 Err(CommandErrorKind::CurrentDirNotFound.into())
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64 }
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65 }
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66 }
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67 }
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68
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69 impl Command for RootCommand {
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70 fn run(&self) -> Result<(), CommandError> {
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71 match FindRoot::new().run() {
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72 Ok(path_buf) => self.display_found_path(path_buf),
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73 Err(e) => self.display_error(e),
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74 }
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75 }
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76 }