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use filetime::FileTime;
use git2::Repository;
use std::collections::HashSet;
use std::path::Path;
use std::{error, fs, result};
#[cfg(feature = "cli")]
pub mod cli;
pub type Result<T> = result::Result<T, Box<dyn error::Error>>;
pub type FileSet = HashSet<String>;
#[derive(Clone, Debug)]
pub struct Options {
paths: Option<FileSet>,
dirty: bool,
ignored: bool,
verbose: bool,
}
impl Default for Options {
fn default() -> Self {
Self::new()
}
}
impl Options {
pub fn new() -> Options {
Options {
paths: None,
dirty: false,
ignored: false,
verbose: false,
}
}
pub fn dirty(&self, flag: bool) -> Options {
Options {
paths: self.paths.clone(),
dirty: flag,
ignored: self.ignored,
verbose: self.verbose,
}
}
pub fn ignored(&self, flag: bool) -> Options {
Options {
paths: self.paths.clone(),
dirty: self.dirty,
ignored: flag,
verbose: self.verbose,
}
}
pub fn verbose(&self, flag: bool) -> Options {
Options {
paths: self.paths.clone(),
dirty: self.dirty,
ignored: self.ignored,
verbose: flag,
}
}
pub fn paths(&self, input: Option<FileSet>) -> Options {
Options {
paths: input,
dirty: self.dirty,
ignored: self.ignored,
verbose: self.verbose,
}
}
}
pub fn reset_mtime(repo: Repository, opts: Options) -> Result<FileSet> {
let workdir_files = gather_workdir_files(&repo)?;
let touchables: FileSet = match opts.paths {
Some(ref paths) => workdir_files.intersection(&paths).cloned().collect(),
None => {
let candidates = gather_index_files(&repo, &opts);
workdir_files.intersection(&candidates).cloned().collect()
}
};
let touched = touch(&repo, touchables, &opts)?;
Ok(touched)
}
pub fn get_repo() -> Result<Repository> {
Ok(Repository::open_from_env()?)
}
fn gather_index_files(repo: &Repository, opts: &Options) -> FileSet {
let mut candidates = FileSet::new();
let mut status_options = git2::StatusOptions::new();
status_options
.include_unmodified(true)
.exclude_submodules(true)
.include_ignored(opts.ignored)
.show(git2::StatusShow::IndexAndWorkdir);
let statuses = repo.statuses(Some(&mut status_options)).unwrap();
for entry in statuses.iter() {
let path = entry.path().unwrap();
match entry.status() {
git2::Status::CURRENT => {
candidates.insert(path.to_string());
}
git2::Status::INDEX_MODIFIED => {
if opts.dirty {
candidates.insert(path.to_string());
} else if opts.verbose {
println!("Ignored file with staged modifications: {}", path);
}
}
git2::Status::WT_MODIFIED => {
if opts.dirty {
candidates.insert(path.to_string());
} else if opts.verbose {
println!("Ignored file with local modifications: {}", path);
}
}
git_state => {
if opts.verbose {
println!("Ignored file in state {:?}: {}", git_state, path);
}
}
}
}
candidates
}
fn gather_workdir_files(repo: &Repository) -> Result<FileSet> {
let mut workdir_files = FileSet::new();
let head = repo.head()?;
let tree = head.peel_to_tree()?;
tree.walk(git2::TreeWalkMode::PostOrder, |dir, entry| {
let file = format!("{}{}", dir, entry.name().unwrap());
let path = Path::new(&file);
if path.is_dir() {
return git2::TreeWalkResult::Skip;
}
workdir_files.insert(file);
git2::TreeWalkResult::Ok
})
.unwrap();
Ok(workdir_files)
}
fn touch(repo: &Repository, touchables: HashSet<String>, opts: &Options) -> Result<FileSet> {
let mut touched = FileSet::new();
for path in touchables.iter() {
let pathbuf = Path::new(path).to_path_buf();
let mut revwalk = repo.revwalk().unwrap();
revwalk.push_head().unwrap();
revwalk.simplify_first_parent().unwrap();
let commits: Vec<_> = revwalk
.map(|oid| oid.and_then(|oid| repo.find_commit(oid)).unwrap())
.collect();
let latest_file_oid = commits
.first()
.unwrap()
.tree()
.unwrap()
.get_path(&pathbuf)
.and_then(|entry| {
if let Some(git2::ObjectType::Blob) = entry.kind() {
Ok(entry)
} else {
Err(git2::Error::new(
git2::ErrorCode::NotFound,
git2::ErrorClass::Tree,
"no blob",
))
}
})
.unwrap()
.id();
let mut file_oid = latest_file_oid;
let mut file_path = pathbuf;
let last_commit = commits
.iter()
.filter_map(|commit| {
let old_tree = commit.parent(0).and_then(|p| p.tree()).ok();
let new_tree = commit.tree().ok();
let mut diff = repo
.diff_tree_to_tree(old_tree.as_ref(), new_tree.as_ref(), None)
.unwrap();
diff.find_similar(Some(git2::DiffFindOptions::new().renames(true)))
.unwrap();
let delta = diff.deltas().find(|delta| {
delta.new_file().id() == file_oid
&& delta
.new_file()
.path()
.filter(|path| *path == file_path)
.is_some()
});
if let Some(delta) = delta.as_ref() {
file_oid = delta.old_file().id();
file_path = delta.old_file().path().unwrap().to_path_buf();
}
delta.map(|_| commit)
})
.next()
.unwrap();
let metadata = fs::metadata(path).unwrap();
let commit_time = FileTime::from_unix_time(last_commit.time().seconds(), 0);
let file_mtime = FileTime::from_last_modification_time(&metadata);
if file_mtime != commit_time {
filetime::set_file_mtime(path, commit_time)?;
if opts.verbose {
println!("Rewound the clock: {}", path);
}
touched.insert((*path).to_string());
}
}
Ok(touched)
}