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// Copyright (c) 2020 Teddy Wing
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
#![warn(rust_2018_idioms)]
use std::io::Write;
use std::path::{Path, PathBuf};
use git2::{DiffOptions, Repository, Tree};
use thiserror::Error;
#[derive(Error, Debug)]
pub enum Error {
#[error(transparent)]
Git(#[from] git2::Error),
}
pub struct Todos<'a> {
pub repo: &'a Repository,
}
impl Todos<'_> {
/// Write TODO lines.
///
/// Writes TODO lines since `tree` to `write_to`.
///
/// # Panics
///
/// Panics if writing to `write_to` fails.
pub fn write_since<W: Write>(
&self,
tree: Tree<'_>,
write_to: &mut W,
) -> Result<(), Error> {
let mut diff_options = DiffOptions::new();
diff_options
.show_untracked_content(true)
.recurse_untracked_dirs(true);
let diff = self.repo.diff_tree_to_workdir_with_index(
Some(&tree),
Some(&mut diff_options),
)?;
diff.foreach(
&mut |_file, _progress| {
true
},
None,
None,
Some(
&mut |delta, _hunk, line| {
if let Some(line_number) = line.new_lineno() {
if let Ok(l) = std::str::from_utf8(line.content()) {
if l.contains("TODO") {
if let Some(path) = delta.new_file().path() {
write!(
write_to,
"{}:{}:{}",
relative_path(self.repo, path).display(),
line_number,
l,
).expect("write error");
}
}
}
}
true
}
),
)?;
Ok(())
}
/// Get a Git tree for the master branch.
pub fn master_tree(&self) -> Result<Tree<'_>, Error> {
let master = self.repo.find_branch("master", git2::BranchType::Local)?;
Ok(master.get().peel_to_tree()?)
}
}
/// Get `path` relative to the current directory.
///
/// Attempt to remove the current directory prefix from `path` to turn it into a
/// relative path from the current directory.
fn relative_path(repo: &Repository, path: &Path) -> PathBuf {
let workdir = match repo.workdir() {
Some(d) => d,
None => return path.to_path_buf(),
};
let current_dir = match std::env::current_dir() {
Ok(d) => d,
Err(_) => return path.to_path_buf(),
};
let current_dir_relative = match current_dir.strip_prefix(workdir) {
Ok(d) => d,
Err(_) => return path.to_path_buf(),
};
match path.strip_prefix(current_dir_relative) {
Ok(d) => d.to_path_buf(),
Err(_) => path.to_path_buf(),
}
}
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