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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
use std::collections::HashMap;
use std::path::Path;
use std::path::PathBuf;
use std::rc::Rc;
use std::sync::Arc;
/// Resolved gitignore for a directory.
pub struct DirGitIgnores {
current: Option<Rc<ignore::gitignore::Gitignore>>,
parent: Option<Rc<DirGitIgnores>>,
}
impl DirGitIgnores {
pub fn is_ignored(&self, path: &Path, is_dir: bool) -> bool {
let mut is_ignored = false;
if let Some(parent) = &self.parent {
is_ignored = parent.is_ignored(path, is_dir);
}
if let Some(current) = &self.current {
match current.matched(path, is_dir) {
ignore::Match::None => {}
ignore::Match::Ignore(_) => {
is_ignored = true;
}
ignore::Match::Whitelist(_) => {
is_ignored = false;
}
}
}
is_ignored
}
}
/// Resolves gitignores in a directory tree taking into account
/// ancestor gitignores that may be found in a directory.
pub struct GitIgnoreTree {
fs: Arc<dyn deno_runtime::deno_fs::FileSystem>,
ignores: HashMap<PathBuf, Option<Rc<DirGitIgnores>>>,
include_paths: Vec<PathBuf>,
}
impl GitIgnoreTree {
pub fn new(
fs: Arc<dyn deno_runtime::deno_fs::FileSystem>,
// paths that should override what's in the gitignore
include_paths: Vec<PathBuf>,
) -> Self {
Self {
fs,
ignores: Default::default(),
include_paths,
}
}
pub fn get_resolved_git_ignore_for_dir(
&mut self,
dir_path: &Path,
) -> Option<Rc<DirGitIgnores>> {
// for directories, provide itself in order to tell
// if it should stop searching for gitignores because
// maybe this dir_path is a .git directory
let parent = dir_path.parent()?;
self.get_resolved_git_ignore_inner(parent, Some(dir_path))
}
pub fn get_resolved_git_ignore_for_file(
&mut self,
file_path: &Path,
) -> Option<Rc<DirGitIgnores>> {
let dir_path = file_path.parent()?;
self.get_resolved_git_ignore_inner(dir_path, None)
}
fn get_resolved_git_ignore_inner(
&mut self,
dir_path: &Path,
maybe_parent: Option<&Path>,
) -> Option<Rc<DirGitIgnores>> {
let maybe_resolved = self.ignores.get(dir_path).cloned();
if let Some(resolved) = maybe_resolved {
resolved
} else {
let resolved = self.resolve_gitignore_in_dir(dir_path, maybe_parent);
self.ignores.insert(dir_path.to_owned(), resolved.clone());
resolved
}
}
fn resolve_gitignore_in_dir(
&mut self,
dir_path: &Path,
maybe_parent: Option<&Path>,
) -> Option<Rc<DirGitIgnores>> {
if let Some(parent) = maybe_parent {
// stop searching if the parent dir had a .git directory in it
if self.fs.exists_sync(&parent.join(".git")) {
return None;
}
}
let parent = dir_path.parent().and_then(|parent| {
self.get_resolved_git_ignore_inner(parent, Some(dir_path))
});
let current = self
.fs
.read_text_file_sync(&dir_path.join(".gitignore"), None)
.ok()
.and_then(|text| {
let mut builder = ignore::gitignore::GitignoreBuilder::new(dir_path);
for line in text.lines() {
builder.add_line(None, line).ok()?;
}
// override the gitignore contents to include these paths
for path in &self.include_paths {
if let Ok(suffix) = path.strip_prefix(dir_path) {
let suffix = suffix.to_string_lossy().replace('\\', "/");
let _ignore = builder.add_line(None, &format!("!/{}", suffix));
if !suffix.ends_with('/') {
let _ignore = builder.add_line(None, &format!("!/{}/", suffix));
}
}
}
let gitignore = builder.build().ok()?;
Some(Rc::new(gitignore))
});
if parent.is_none() && current.is_none() {
None
} else {
Some(Rc::new(DirGitIgnores { current, parent }))
}
}
}
#[cfg(test)]
mod test {
use deno_runtime::deno_fs::InMemoryFs;
use super::*;
#[test]
fn git_ignore_tree() {
let fs = InMemoryFs::default();
fs.setup_text_files(vec![
("/.gitignore".into(), "file.txt".into()),
("/sub_dir/.gitignore".into(), "data.txt".into()),
(
"/sub_dir/sub_dir/.gitignore".into(),
"!file.txt\nignore.txt".into(),
),
]);
let mut ignore_tree = GitIgnoreTree::new(Arc::new(fs), Vec::new());
let mut run_test = |path: &str, expected: bool| {
let path = PathBuf::from(path);
let gitignore =
ignore_tree.get_resolved_git_ignore_for_file(&path).unwrap();
assert_eq!(
gitignore.is_ignored(&path, /* is_dir */ false),
expected,
"Path: {}",
path.display()
);
};
run_test("/file.txt", true);
run_test("/other.txt", false);
run_test("/data.txt", false);
run_test("/sub_dir/file.txt", true);
run_test("/sub_dir/other.txt", false);
run_test("/sub_dir/data.txt", true);
run_test("/sub_dir/sub_dir/file.txt", false); // unignored up here
run_test("/sub_dir/sub_dir/sub_dir/file.txt", false);
run_test("/sub_dir/sub_dir/sub_dir/ignore.txt", true);
run_test("/sub_dir/sub_dir/ignore.txt", true);
run_test("/sub_dir/ignore.txt", false);
run_test("/ignore.txt", false);
}
}
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