|
|
use crate::dirstate::entry::TruncatedTimestamp;
|
|
|
use crate::dirstate::status::IgnoreFnType;
|
|
|
use crate::dirstate::status::StatusPath;
|
|
|
use crate::dirstate_tree::dirstate_map::BorrowedPath;
|
|
|
use crate::dirstate_tree::dirstate_map::ChildNodesRef;
|
|
|
use crate::dirstate_tree::dirstate_map::DirstateMap;
|
|
|
use crate::dirstate_tree::dirstate_map::DirstateVersion;
|
|
|
use crate::dirstate_tree::dirstate_map::NodeRef;
|
|
|
use crate::dirstate_tree::on_disk::DirstateV2ParseError;
|
|
|
use crate::matchers::get_ignore_function;
|
|
|
use crate::matchers::Matcher;
|
|
|
use crate::utils::files::get_bytes_from_os_string;
|
|
|
use crate::utils::files::get_path_from_bytes;
|
|
|
use crate::utils::hg_path::HgPath;
|
|
|
use crate::BadMatch;
|
|
|
use crate::DirstateStatus;
|
|
|
use crate::HgPathBuf;
|
|
|
use crate::HgPathCow;
|
|
|
use crate::PatternFileWarning;
|
|
|
use crate::StatusError;
|
|
|
use crate::StatusOptions;
|
|
|
use micro_timer::timed;
|
|
|
use rayon::prelude::*;
|
|
|
use sha1::{Digest, Sha1};
|
|
|
use std::borrow::Cow;
|
|
|
use std::io;
|
|
|
use std::path::Path;
|
|
|
use std::path::PathBuf;
|
|
|
use std::sync::Mutex;
|
|
|
use std::time::SystemTime;
|
|
|
|
|
|
/// Returns the status of the working directory compared to its parent
|
|
|
/// changeset.
|
|
|
///
|
|
|
/// This algorithm is based on traversing the filesystem tree (`fs` in function
|
|
|
/// and variable names) and dirstate tree at the same time. The core of this
|
|
|
/// traversal is the recursive `traverse_fs_directory_and_dirstate` function
|
|
|
/// and its use of `itertools::merge_join_by`. When reaching a path that only
|
|
|
/// exists in one of the two trees, depending on information requested by
|
|
|
/// `options` we may need to traverse the remaining subtree.
|
|
|
#[timed]
|
|
|
pub fn status<'dirstate>(
|
|
|
dmap: &'dirstate mut DirstateMap,
|
|
|
matcher: &(dyn Matcher + Sync),
|
|
|
root_dir: PathBuf,
|
|
|
ignore_files: Vec<PathBuf>,
|
|
|
options: StatusOptions,
|
|
|
) -> Result<(DirstateStatus<'dirstate>, Vec<PatternFileWarning>), StatusError>
|
|
|
{
|
|
|
// Force the global rayon threadpool to not exceed 16 concurrent threads.
|
|
|
// This is a stop-gap measure until we figure out why using more than 16
|
|
|
// threads makes `status` slower for each additional thread.
|
|
|
// We use `ok()` in case the global threadpool has already been
|
|
|
// instantiated in `rhg` or some other caller.
|
|
|
// TODO find the underlying cause and fix it, then remove this.
|
|
|
rayon::ThreadPoolBuilder::new()
|
|
|
.num_threads(16)
|
|
|
.build_global()
|
|
|
.ok();
|
|
|
|
|
|
let (ignore_fn, warnings, patterns_changed): (IgnoreFnType, _, _) =
|
|
|
if options.list_ignored || options.list_unknown {
|
|
|
let (ignore_fn, warnings, changed) = match dmap.dirstate_version {
|
|
|
DirstateVersion::V1 => {
|
|
|
let (ignore_fn, warnings) = get_ignore_function(
|
|
|
ignore_files,
|
|
|
&root_dir,
|
|
|
&mut |_pattern_bytes| {},
|
|
|
)?;
|
|
|
(ignore_fn, warnings, None)
|
|
|
}
|
|
|
DirstateVersion::V2 => {
|
|
|
let mut hasher = Sha1::new();
|
|
|
let (ignore_fn, warnings) = get_ignore_function(
|
|
|
ignore_files,
|
|
|
&root_dir,
|
|
|
&mut |pattern_bytes| hasher.update(pattern_bytes),
|
|
|
)?;
|
|
|
let new_hash = *hasher.finalize().as_ref();
|
|
|
let changed = new_hash != dmap.ignore_patterns_hash;
|
|
|
dmap.ignore_patterns_hash = new_hash;
|
|
|
(ignore_fn, warnings, Some(changed))
|
|
|
}
|
|
|
};
|
|
|
(ignore_fn, warnings, changed)
|
|
|
} else {
|
|
|
(Box::new(|&_| true), vec![], None)
|
|
|
};
|
|
|
|
|
|
let filesystem_time_at_status_start =
|
|
|
filesystem_now(&root_dir).ok().map(TruncatedTimestamp::from);
|
|
|
|
|
|
// If the repository is under the current directory, prefer using a
|
|
|
// relative path, so the kernel needs to traverse fewer directory in every
|
|
|
// call to `read_dir` or `symlink_metadata`.
|
|
|
// This is effective in the common case where the current directory is the
|
|
|
// repository root.
|
|
|
|
|
|
// TODO: Better yet would be to use libc functions like `openat` and
|
|
|
// `fstatat` to remove such repeated traversals entirely, but the standard
|
|
|
// library does not provide APIs based on those.
|
|
|
// Maybe with a crate like https://crates.io/crates/openat instead?
|
|
|
let root_dir = if let Some(relative) = std::env::current_dir()
|
|
|
.ok()
|
|
|
.and_then(|cwd| root_dir.strip_prefix(cwd).ok())
|
|
|
{
|
|
|
relative
|
|
|
} else {
|
|
|
&root_dir
|
|
|
};
|
|
|
|
|
|
let outcome = DirstateStatus {
|
|
|
filesystem_time_at_status_start,
|
|
|
..Default::default()
|
|
|
};
|
|
|
let common = StatusCommon {
|
|
|
dmap,
|
|
|
options,
|
|
|
matcher,
|
|
|
ignore_fn,
|
|
|
outcome: Mutex::new(outcome),
|
|
|
ignore_patterns_have_changed: patterns_changed,
|
|
|
new_cachable_directories: Default::default(),
|
|
|
outated_cached_directories: Default::default(),
|
|
|
filesystem_time_at_status_start,
|
|
|
};
|
|
|
let is_at_repo_root = true;
|
|
|
let hg_path = &BorrowedPath::OnDisk(HgPath::new(""));
|
|
|
let has_ignored_ancestor = false;
|
|
|
let root_cached_mtime = None;
|
|
|
let root_dir_metadata = None;
|
|
|
// If the path we have for the repository root is a symlink, do follow it.
|
|
|
// (As opposed to symlinks within the working directory which are not
|
|
|
// followed, using `std::fs::symlink_metadata`.)
|
|
|
common.traverse_fs_directory_and_dirstate(
|
|
|
has_ignored_ancestor,
|
|
|
dmap.root.as_ref(),
|
|
|
hg_path,
|
|
|
&root_dir,
|
|
|
root_dir_metadata,
|
|
|
root_cached_mtime,
|
|
|
is_at_repo_root,
|
|
|
)?;
|
|
|
let mut outcome = common.outcome.into_inner().unwrap();
|
|
|
let new_cachable = common.new_cachable_directories.into_inner().unwrap();
|
|
|
let outdated = common.outated_cached_directories.into_inner().unwrap();
|
|
|
|
|
|
outcome.dirty = common.ignore_patterns_have_changed == Some(true)
|
|
|
|| !outdated.is_empty()
|
|
|
|| (!new_cachable.is_empty()
|
|
|
&& dmap.dirstate_version == DirstateVersion::V2);
|
|
|
|
|
|
// Remove outdated mtimes before adding new mtimes, in case a given
|
|
|
// directory is both
|
|
|
for path in &outdated {
|
|
|
dmap.clear_cached_mtime(path)?;
|
|
|
}
|
|
|
for (path, mtime) in &new_cachable {
|
|
|
dmap.set_cached_mtime(path, *mtime)?;
|
|
|
}
|
|
|
|
|
|
Ok((outcome, warnings))
|
|
|
}
|
|
|
|
|
|
/// Bag of random things needed by various parts of the algorithm. Reduces the
|
|
|
/// number of parameters passed to functions.
|
|
|
struct StatusCommon<'a, 'tree, 'on_disk: 'tree> {
|
|
|
dmap: &'tree DirstateMap<'on_disk>,
|
|
|
options: StatusOptions,
|
|
|
matcher: &'a (dyn Matcher + Sync),
|
|
|
ignore_fn: IgnoreFnType<'a>,
|
|
|
outcome: Mutex<DirstateStatus<'on_disk>>,
|
|
|
new_cachable_directories:
|
|
|
Mutex<Vec<(Cow<'on_disk, HgPath>, TruncatedTimestamp)>>,
|
|
|
outated_cached_directories: Mutex<Vec<Cow<'on_disk, HgPath>>>,
|
|
|
|
|
|
/// Whether ignore files like `.hgignore` have changed since the previous
|
|
|
/// time a `status()` call wrote their hash to the dirstate. `None` means
|
|
|
/// we don’t know as this run doesn’t list either ignored or uknown files
|
|
|
/// and therefore isn’t reading `.hgignore`.
|
|
|
ignore_patterns_have_changed: Option<bool>,
|
|
|
|
|
|
/// The current time at the start of the `status()` algorithm, as measured
|
|
|
/// and possibly truncated by the filesystem.
|
|
|
filesystem_time_at_status_start: Option<TruncatedTimestamp>,
|
|
|
}
|
|
|
|
|
|
enum Outcome {
|
|
|
Modified,
|
|
|
Added,
|
|
|
Removed,
|
|
|
Deleted,
|
|
|
Clean,
|
|
|
Ignored,
|
|
|
Unknown,
|
|
|
Unsure,
|
|
|
}
|
|
|
|
|
|
impl<'a, 'tree, 'on_disk> StatusCommon<'a, 'tree, 'on_disk> {
|
|
|
fn push_outcome(
|
|
|
&self,
|
|
|
which: Outcome,
|
|
|
dirstate_node: &NodeRef<'tree, 'on_disk>,
|
|
|
) -> Result<(), DirstateV2ParseError> {
|
|
|
let path = dirstate_node
|
|
|
.full_path_borrowed(self.dmap.on_disk)?
|
|
|
.detach_from_tree();
|
|
|
let copy_source = if self.options.list_copies {
|
|
|
dirstate_node
|
|
|
.copy_source_borrowed(self.dmap.on_disk)?
|
|
|
.map(|source| source.detach_from_tree())
|
|
|
} else {
|
|
|
None
|
|
|
};
|
|
|
self.push_outcome_common(which, path, copy_source);
|
|
|
Ok(())
|
|
|
}
|
|
|
|
|
|
fn push_outcome_without_copy_source(
|
|
|
&self,
|
|
|
which: Outcome,
|
|
|
path: &BorrowedPath<'_, 'on_disk>,
|
|
|
) {
|
|
|
self.push_outcome_common(which, path.detach_from_tree(), None)
|
|
|
}
|
|
|
|
|
|
fn push_outcome_common(
|
|
|
&self,
|
|
|
which: Outcome,
|
|
|
path: HgPathCow<'on_disk>,
|
|
|
copy_source: Option<HgPathCow<'on_disk>>,
|
|
|
) {
|
|
|
let mut outcome = self.outcome.lock().unwrap();
|
|
|
let vec = match which {
|
|
|
Outcome::Modified => &mut outcome.modified,
|
|
|
Outcome::Added => &mut outcome.added,
|
|
|
Outcome::Removed => &mut outcome.removed,
|
|
|
Outcome::Deleted => &mut outcome.deleted,
|
|
|
Outcome::Clean => &mut outcome.clean,
|
|
|
Outcome::Ignored => &mut outcome.ignored,
|
|
|
Outcome::Unknown => &mut outcome.unknown,
|
|
|
Outcome::Unsure => &mut outcome.unsure,
|
|
|
};
|
|
|
vec.push(StatusPath { path, copy_source });
|
|
|
}
|
|
|
|
|
|
fn read_dir(
|
|
|
&self,
|
|
|
hg_path: &HgPath,
|
|
|
fs_path: &Path,
|
|
|
is_at_repo_root: bool,
|
|
|
) -> Result<Vec<DirEntry>, ()> {
|
|
|
DirEntry::read_dir(fs_path, is_at_repo_root)
|
|
|
.map_err(|error| self.io_error(error, hg_path))
|
|
|
}
|
|
|
|
|
|
fn io_error(&self, error: std::io::Error, hg_path: &HgPath) {
|
|
|
let errno = error.raw_os_error().expect("expected real OS error");
|
|
|
self.outcome
|
|
|
.lock()
|
|
|
.unwrap()
|
|
|
.bad
|
|
|
.push((hg_path.to_owned().into(), BadMatch::OsError(errno)))
|
|
|
}
|
|
|
|
|
|
fn check_for_outdated_directory_cache(
|
|
|
&self,
|
|
|
dirstate_node: &NodeRef<'tree, 'on_disk>,
|
|
|
) -> Result<(), DirstateV2ParseError> {
|
|
|
if self.ignore_patterns_have_changed == Some(true)
|
|
|
&& dirstate_node.cached_directory_mtime()?.is_some()
|
|
|
{
|
|
|
self.outated_cached_directories.lock().unwrap().push(
|
|
|
dirstate_node
|
|
|
.full_path_borrowed(self.dmap.on_disk)?
|
|
|
.detach_from_tree(),
|
|
|
)
|
|
|
}
|
|
|
Ok(())
|
|
|
}
|
|
|
|
|
|
/// If this returns true, we can get accurate results by only using
|
|
|
/// `symlink_metadata` for child nodes that exist in the dirstate and don’t
|
|
|
/// need to call `read_dir`.
|
|
|
fn can_skip_fs_readdir(
|
|
|
&self,
|
|
|
directory_metadata: Option<&std::fs::Metadata>,
|
|
|
cached_directory_mtime: Option<TruncatedTimestamp>,
|
|
|
) -> bool {
|
|
|
if !self.options.list_unknown && !self.options.list_ignored {
|
|
|
// All states that we care about listing have corresponding
|
|
|
// dirstate entries.
|
|
|
// This happens for example with `hg status -mard`.
|
|
|
return true;
|
|
|
}
|
|
|
if !self.options.list_ignored
|
|
|
&& self.ignore_patterns_have_changed == Some(false)
|
|
|
{
|
|
|
if let Some(cached_mtime) = cached_directory_mtime {
|
|
|
// The dirstate contains a cached mtime for this directory, set
|
|
|
// by a previous run of the `status` algorithm which found this
|
|
|
// directory eligible for `read_dir` caching.
|
|
|
if let Some(meta) = directory_metadata {
|
|
|
if cached_mtime
|
|
|
.likely_equal_to_mtime_of(meta)
|
|
|
.unwrap_or(false)
|
|
|
{
|
|
|
// The mtime of that directory has not changed
|
|
|
// since then, which means that the results of
|
|
|
// `read_dir` should also be unchanged.
|
|
|
return true;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
false
|
|
|
}
|
|
|
|
|
|
/// Returns whether all child entries of the filesystem directory have a
|
|
|
/// corresponding dirstate node or are ignored.
|
|
|
fn traverse_fs_directory_and_dirstate(
|
|
|
&self,
|
|
|
has_ignored_ancestor: bool,
|
|
|
dirstate_nodes: ChildNodesRef<'tree, 'on_disk>,
|
|
|
directory_hg_path: &BorrowedPath<'tree, 'on_disk>,
|
|
|
directory_fs_path: &Path,
|
|
|
directory_metadata: Option<&std::fs::Metadata>,
|
|
|
cached_directory_mtime: Option<TruncatedTimestamp>,
|
|
|
is_at_repo_root: bool,
|
|
|
) -> Result<bool, DirstateV2ParseError> {
|
|
|
if self.can_skip_fs_readdir(directory_metadata, cached_directory_mtime)
|
|
|
{
|
|
|
dirstate_nodes
|
|
|
.par_iter()
|
|
|
.map(|dirstate_node| {
|
|
|
let fs_path = directory_fs_path.join(get_path_from_bytes(
|
|
|
dirstate_node.base_name(self.dmap.on_disk)?.as_bytes(),
|
|
|
));
|
|
|
match std::fs::symlink_metadata(&fs_path) {
|
|
|
Ok(fs_metadata) => self.traverse_fs_and_dirstate(
|
|
|
&fs_path,
|
|
|
&fs_metadata,
|
|
|
dirstate_node,
|
|
|
has_ignored_ancestor,
|
|
|
),
|
|
|
Err(e) if e.kind() == std::io::ErrorKind::NotFound => {
|
|
|
self.traverse_dirstate_only(dirstate_node)
|
|
|
}
|
|
|
Err(error) => {
|
|
|
let hg_path =
|
|
|
dirstate_node.full_path(self.dmap.on_disk)?;
|
|
|
Ok(self.io_error(error, hg_path))
|
|
|
}
|
|
|
}
|
|
|
})
|
|
|
.collect::<Result<_, _>>()?;
|
|
|
|
|
|
// We don’t know, so conservatively say this isn’t the case
|
|
|
let children_all_have_dirstate_node_or_are_ignored = false;
|
|
|
|
|
|
return Ok(children_all_have_dirstate_node_or_are_ignored);
|
|
|
}
|
|
|
|
|
|
let mut fs_entries = if let Ok(entries) = self.read_dir(
|
|
|
directory_hg_path,
|
|
|
directory_fs_path,
|
|
|
is_at_repo_root,
|
|
|
) {
|
|
|
entries
|
|
|
} else {
|
|
|
// Treat an unreadable directory (typically because of insufficient
|
|
|
// permissions) like an empty directory. `self.read_dir` has
|
|
|
// already called `self.io_error` so a warning will be emitted.
|
|
|
Vec::new()
|
|
|
};
|
|
|
|
|
|
// `merge_join_by` requires both its input iterators to be sorted:
|
|
|
|
|
|
let dirstate_nodes = dirstate_nodes.sorted();
|
|
|
// `sort_unstable_by_key` doesn’t allow keys borrowing from the value:
|
|
|
// https://github.com/rust-lang/rust/issues/34162
|
|
|
fs_entries.sort_unstable_by(|e1, e2| e1.base_name.cmp(&e2.base_name));
|
|
|
|
|
|
// Propagate here any error that would happen inside the comparison
|
|
|
// callback below
|
|
|
for dirstate_node in &dirstate_nodes {
|
|
|
dirstate_node.base_name(self.dmap.on_disk)?;
|
|
|
}
|
|
|
itertools::merge_join_by(
|
|
|
dirstate_nodes,
|
|
|
&fs_entries,
|
|
|
|dirstate_node, fs_entry| {
|
|
|
// This `unwrap` never panics because we already propagated
|
|
|
// those errors above
|
|
|
dirstate_node
|
|
|
.base_name(self.dmap.on_disk)
|
|
|
.unwrap()
|
|
|
.cmp(&fs_entry.base_name)
|
|
|
},
|
|
|
)
|
|
|
.par_bridge()
|
|
|
.map(|pair| {
|
|
|
use itertools::EitherOrBoth::*;
|
|
|
let has_dirstate_node_or_is_ignored;
|
|
|
match pair {
|
|
|
Both(dirstate_node, fs_entry) => {
|
|
|
self.traverse_fs_and_dirstate(
|
|
|
&fs_entry.full_path,
|
|
|
&fs_entry.metadata,
|
|
|
dirstate_node,
|
|
|
has_ignored_ancestor,
|
|
|
)?;
|
|
|
has_dirstate_node_or_is_ignored = true
|
|
|
}
|
|
|
Left(dirstate_node) => {
|
|
|
self.traverse_dirstate_only(dirstate_node)?;
|
|
|
has_dirstate_node_or_is_ignored = true;
|
|
|
}
|
|
|
Right(fs_entry) => {
|
|
|
has_dirstate_node_or_is_ignored = self.traverse_fs_only(
|
|
|
has_ignored_ancestor,
|
|
|
directory_hg_path,
|
|
|
fs_entry,
|
|
|
)
|
|
|
}
|
|
|
}
|
|
|
Ok(has_dirstate_node_or_is_ignored)
|
|
|
})
|
|
|
.try_reduce(|| true, |a, b| Ok(a && b))
|
|
|
}
|
|
|
|
|
|
fn traverse_fs_and_dirstate(
|
|
|
&self,
|
|
|
fs_path: &Path,
|
|
|
fs_metadata: &std::fs::Metadata,
|
|
|
dirstate_node: NodeRef<'tree, 'on_disk>,
|
|
|
has_ignored_ancestor: bool,
|
|
|
) -> Result<(), DirstateV2ParseError> {
|
|
|
self.check_for_outdated_directory_cache(&dirstate_node)?;
|
|
|
let hg_path = &dirstate_node.full_path_borrowed(self.dmap.on_disk)?;
|
|
|
let file_type = fs_metadata.file_type();
|
|
|
let file_or_symlink = file_type.is_file() || file_type.is_symlink();
|
|
|
if !file_or_symlink {
|
|
|
// If we previously had a file here, it was removed (with
|
|
|
// `hg rm` or similar) or deleted before it could be
|
|
|
// replaced by a directory or something else.
|
|
|
self.mark_removed_or_deleted_if_file(&dirstate_node)?;
|
|
|
}
|
|
|
if file_type.is_dir() {
|
|
|
if self.options.collect_traversed_dirs {
|
|
|
self.outcome
|
|
|
.lock()
|
|
|
.unwrap()
|
|
|
.traversed
|
|
|
.push(hg_path.detach_from_tree())
|
|
|
}
|
|
|
let is_ignored = has_ignored_ancestor || (self.ignore_fn)(hg_path);
|
|
|
let is_at_repo_root = false;
|
|
|
let children_all_have_dirstate_node_or_are_ignored = self
|
|
|
.traverse_fs_directory_and_dirstate(
|
|
|
is_ignored,
|
|
|
dirstate_node.children(self.dmap.on_disk)?,
|
|
|
hg_path,
|
|
|
fs_path,
|
|
|
Some(fs_metadata),
|
|
|
dirstate_node.cached_directory_mtime()?,
|
|
|
is_at_repo_root,
|
|
|
)?;
|
|
|
self.maybe_save_directory_mtime(
|
|
|
children_all_have_dirstate_node_or_are_ignored,
|
|
|
fs_metadata,
|
|
|
dirstate_node,
|
|
|
)?
|
|
|
} else {
|
|
|
if file_or_symlink && self.matcher.matches(hg_path) {
|
|
|
if let Some(entry) = dirstate_node.entry()? {
|
|
|
if !entry.any_tracked() {
|
|
|
// Forward-compat if we start tracking unknown/ignored
|
|
|
// files for caching reasons
|
|
|
self.mark_unknown_or_ignored(
|
|
|
has_ignored_ancestor,
|
|
|
hg_path,
|
|
|
);
|
|
|
}
|
|
|
if entry.added() {
|
|
|
self.push_outcome(Outcome::Added, &dirstate_node)?;
|
|
|
} else if entry.removed() {
|
|
|
self.push_outcome(Outcome::Removed, &dirstate_node)?;
|
|
|
} else if entry.modified() {
|
|
|
self.push_outcome(Outcome::Modified, &dirstate_node)?;
|
|
|
} else {
|
|
|
self.handle_normal_file(&dirstate_node, fs_metadata)?;
|
|
|
}
|
|
|
} else {
|
|
|
// `node.entry.is_none()` indicates a "directory"
|
|
|
// node, but the filesystem has a file
|
|
|
self.mark_unknown_or_ignored(
|
|
|
has_ignored_ancestor,
|
|
|
hg_path,
|
|
|
);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
for child_node in dirstate_node.children(self.dmap.on_disk)?.iter()
|
|
|
{
|
|
|
self.traverse_dirstate_only(child_node)?
|
|
|
}
|
|
|
}
|
|
|
Ok(())
|
|
|
}
|
|
|
|
|
|
fn maybe_save_directory_mtime(
|
|
|
&self,
|
|
|
children_all_have_dirstate_node_or_are_ignored: bool,
|
|
|
directory_metadata: &std::fs::Metadata,
|
|
|
dirstate_node: NodeRef<'tree, 'on_disk>,
|
|
|
) -> Result<(), DirstateV2ParseError> {
|
|
|
if !children_all_have_dirstate_node_or_are_ignored {
|
|
|
return Ok(());
|
|
|
}
|
|
|
// All filesystem directory entries from `read_dir` have a
|
|
|
// corresponding node in the dirstate, so we can reconstitute the
|
|
|
// names of those entries without calling `read_dir` again.
|
|
|
|
|
|
// TODO: use let-else here and below when available:
|
|
|
// https://github.com/rust-lang/rust/issues/87335
|
|
|
let status_start = if let Some(status_start) =
|
|
|
&self.filesystem_time_at_status_start
|
|
|
{
|
|
|
status_start
|
|
|
} else {
|
|
|
return Ok(());
|
|
|
};
|
|
|
|
|
|
// Although the Rust standard library’s `SystemTime` type
|
|
|
// has nanosecond precision, the times reported for a
|
|
|
// directory’s (or file’s) modified time may have lower
|
|
|
// resolution based on the filesystem (for example ext3
|
|
|
// only stores integer seconds), kernel (see
|
|
|
// https://stackoverflow.com/a/14393315/1162888), etc.
|
|
|
let directory_mtime = if let Ok(option) =
|
|
|
TruncatedTimestamp::for_reliable_mtime_of(
|
|
|
directory_metadata,
|
|
|
status_start,
|
|
|
) {
|
|
|
if let Some(directory_mtime) = option {
|
|
|
directory_mtime
|
|
|
} else {
|
|
|
// The directory was modified too recently,
|
|
|
// don’t cache its `read_dir` results.
|
|
|
//
|
|
|
// 1. A change to this directory (direct child was
|
|
|
// added or removed) cause its mtime to be set
|
|
|
// (possibly truncated) to `directory_mtime`
|
|
|
// 2. This `status` algorithm calls `read_dir`
|
|
|
// 3. An other change is made to the same directory is
|
|
|
// made so that calling `read_dir` agin would give
|
|
|
// different results, but soon enough after 1. that
|
|
|
// the mtime stays the same
|
|
|
//
|
|
|
// On a system where the time resolution poor, this
|
|
|
// scenario is not unlikely if all three steps are caused
|
|
|
// by the same script.
|
|
|
return Ok(());
|
|
|
}
|
|
|
} else {
|
|
|
// OS/libc does not support mtime?
|
|
|
return Ok(());
|
|
|
};
|
|
|
// We’ve observed (through `status_start`) that time has
|
|
|
// “progressed” since `directory_mtime`, so any further
|
|
|
// change to this directory is extremely likely to cause a
|
|
|
// different mtime.
|
|
|
//
|
|
|
// Having the same mtime again is not entirely impossible
|
|
|
// since the system clock is not monotonous. It could jump
|
|
|
// backward to some point before `directory_mtime`, then a
|
|
|
// directory change could potentially happen during exactly
|
|
|
// the wrong tick.
|
|
|
//
|
|
|
// We deem this scenario (unlike the previous one) to be
|
|
|
// unlikely enough in practice.
|
|
|
|
|
|
let is_up_to_date =
|
|
|
if let Some(cached) = dirstate_node.cached_directory_mtime()? {
|
|
|
cached.likely_equal(directory_mtime)
|
|
|
} else {
|
|
|
false
|
|
|
};
|
|
|
if !is_up_to_date {
|
|
|
let hg_path = dirstate_node
|
|
|
.full_path_borrowed(self.dmap.on_disk)?
|
|
|
.detach_from_tree();
|
|
|
self.new_cachable_directories
|
|
|
.lock()
|
|
|
.unwrap()
|
|
|
.push((hg_path, directory_mtime))
|
|
|
}
|
|
|
Ok(())
|
|
|
}
|
|
|
|
|
|
/// A file that is clean in the dirstate was found in the filesystem
|
|
|
fn handle_normal_file(
|
|
|
&self,
|
|
|
dirstate_node: &NodeRef<'tree, 'on_disk>,
|
|
|
fs_metadata: &std::fs::Metadata,
|
|
|
) -> Result<(), DirstateV2ParseError> {
|
|
|
// Keep the low 31 bits
|
|
|
fn truncate_u64(value: u64) -> i32 {
|
|
|
(value & 0x7FFF_FFFF) as i32
|
|
|
}
|
|
|
|
|
|
let entry = dirstate_node
|
|
|
.entry()?
|
|
|
.expect("handle_normal_file called with entry-less node");
|
|
|
let mode_changed =
|
|
|
|| self.options.check_exec && entry.mode_changed(fs_metadata);
|
|
|
let size = entry.size();
|
|
|
let size_changed = size != truncate_u64(fs_metadata.len());
|
|
|
if size >= 0 && size_changed && fs_metadata.file_type().is_symlink() {
|
|
|
// issue6456: Size returned may be longer due to encryption
|
|
|
// on EXT-4 fscrypt. TODO maybe only do it on EXT4?
|
|
|
self.push_outcome(Outcome::Unsure, dirstate_node)?
|
|
|
} else if dirstate_node.has_copy_source()
|
|
|
|| entry.is_from_other_parent()
|
|
|
|| (size >= 0 && (size_changed || mode_changed()))
|
|
|
{
|
|
|
self.push_outcome(Outcome::Modified, dirstate_node)?
|
|
|
} else {
|
|
|
let mtime_looks_clean;
|
|
|
if let Some(dirstate_mtime) = entry.truncated_mtime() {
|
|
|
let fs_mtime = TruncatedTimestamp::for_mtime_of(fs_metadata)
|
|
|
.expect("OS/libc does not support mtime?");
|
|
|
// There might be a change in the future if for example the
|
|
|
// internal clock become off while process run, but this is a
|
|
|
// case where the issues the user would face
|
|
|
// would be a lot worse and there is nothing we
|
|
|
// can really do.
|
|
|
mtime_looks_clean = fs_mtime.likely_equal(dirstate_mtime)
|
|
|
} else {
|
|
|
// No mtime in the dirstate entry
|
|
|
mtime_looks_clean = false
|
|
|
};
|
|
|
if !mtime_looks_clean {
|
|
|
self.push_outcome(Outcome::Unsure, dirstate_node)?
|
|
|
} else if self.options.list_clean {
|
|
|
self.push_outcome(Outcome::Clean, dirstate_node)?
|
|
|
}
|
|
|
}
|
|
|
Ok(())
|
|
|
}
|
|
|
|
|
|
/// A node in the dirstate tree has no corresponding filesystem entry
|
|
|
fn traverse_dirstate_only(
|
|
|
&self,
|
|
|
dirstate_node: NodeRef<'tree, 'on_disk>,
|
|
|
) -> Result<(), DirstateV2ParseError> {
|
|
|
self.check_for_outdated_directory_cache(&dirstate_node)?;
|
|
|
self.mark_removed_or_deleted_if_file(&dirstate_node)?;
|
|
|
dirstate_node
|
|
|
.children(self.dmap.on_disk)?
|
|
|
.par_iter()
|
|
|
.map(|child_node| self.traverse_dirstate_only(child_node))
|
|
|
.collect()
|
|
|
}
|
|
|
|
|
|
/// A node in the dirstate tree has no corresponding *file* on the
|
|
|
/// filesystem
|
|
|
///
|
|
|
/// Does nothing on a "directory" node
|
|
|
fn mark_removed_or_deleted_if_file(
|
|
|
&self,
|
|
|
dirstate_node: &NodeRef<'tree, 'on_disk>,
|
|
|
) -> Result<(), DirstateV2ParseError> {
|
|
|
if let Some(entry) = dirstate_node.entry()? {
|
|
|
if !entry.any_tracked() {
|
|
|
// Future-compat for when we start storing ignored and unknown
|
|
|
// files for caching reasons
|
|
|
return Ok(());
|
|
|
}
|
|
|
let path = dirstate_node.full_path(self.dmap.on_disk)?;
|
|
|
if self.matcher.matches(path) {
|
|
|
if entry.removed() {
|
|
|
self.push_outcome(Outcome::Removed, dirstate_node)?
|
|
|
} else {
|
|
|
self.push_outcome(Outcome::Deleted, &dirstate_node)?
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
Ok(())
|
|
|
}
|
|
|
|
|
|
/// Something in the filesystem has no corresponding dirstate node
|
|
|
///
|
|
|
/// Returns whether that path is ignored
|
|
|
fn traverse_fs_only(
|
|
|
&self,
|
|
|
has_ignored_ancestor: bool,
|
|
|
directory_hg_path: &HgPath,
|
|
|
fs_entry: &DirEntry,
|
|
|
) -> bool {
|
|
|
let hg_path = directory_hg_path.join(&fs_entry.base_name);
|
|
|
let file_type = fs_entry.metadata.file_type();
|
|
|
let file_or_symlink = file_type.is_file() || file_type.is_symlink();
|
|
|
if file_type.is_dir() {
|
|
|
let is_ignored =
|
|
|
has_ignored_ancestor || (self.ignore_fn)(&hg_path);
|
|
|
let traverse_children = if is_ignored {
|
|
|
// Descendants of an ignored directory are all ignored
|
|
|
self.options.list_ignored
|
|
|
} else {
|
|
|
// Descendants of an unknown directory may be either unknown or
|
|
|
// ignored
|
|
|
self.options.list_unknown || self.options.list_ignored
|
|
|
};
|
|
|
if traverse_children {
|
|
|
let is_at_repo_root = false;
|
|
|
if let Ok(children_fs_entries) = self.read_dir(
|
|
|
&hg_path,
|
|
|
&fs_entry.full_path,
|
|
|
is_at_repo_root,
|
|
|
) {
|
|
|
children_fs_entries.par_iter().for_each(|child_fs_entry| {
|
|
|
self.traverse_fs_only(
|
|
|
is_ignored,
|
|
|
&hg_path,
|
|
|
child_fs_entry,
|
|
|
);
|
|
|
})
|
|
|
}
|
|
|
if self.options.collect_traversed_dirs {
|
|
|
self.outcome.lock().unwrap().traversed.push(hg_path.into())
|
|
|
}
|
|
|
}
|
|
|
is_ignored
|
|
|
} else {
|
|
|
if file_or_symlink {
|
|
|
if self.matcher.matches(&hg_path) {
|
|
|
self.mark_unknown_or_ignored(
|
|
|
has_ignored_ancestor,
|
|
|
&BorrowedPath::InMemory(&hg_path),
|
|
|
)
|
|
|
} else {
|
|
|
// We haven’t computed whether this path is ignored. It
|
|
|
// might not be, and a future run of status might have a
|
|
|
// different matcher that matches it. So treat it as not
|
|
|
// ignored. That is, inhibit readdir caching of the parent
|
|
|
// directory.
|
|
|
false
|
|
|
}
|
|
|
} else {
|
|
|
// This is neither a directory, a plain file, or a symlink.
|
|
|
// Treat it like an ignored file.
|
|
|
true
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/// Returns whether that path is ignored
|
|
|
fn mark_unknown_or_ignored(
|
|
|
&self,
|
|
|
has_ignored_ancestor: bool,
|
|
|
hg_path: &BorrowedPath<'_, 'on_disk>,
|
|
|
) -> bool {
|
|
|
let is_ignored = has_ignored_ancestor || (self.ignore_fn)(&hg_path);
|
|
|
if is_ignored {
|
|
|
if self.options.list_ignored {
|
|
|
self.push_outcome_without_copy_source(
|
|
|
Outcome::Ignored,
|
|
|
hg_path,
|
|
|
)
|
|
|
}
|
|
|
} else {
|
|
|
if self.options.list_unknown {
|
|
|
self.push_outcome_without_copy_source(
|
|
|
Outcome::Unknown,
|
|
|
hg_path,
|
|
|
)
|
|
|
}
|
|
|
}
|
|
|
is_ignored
|
|
|
}
|
|
|
}
|
|
|
|
|
|
struct DirEntry {
|
|
|
base_name: HgPathBuf,
|
|
|
full_path: PathBuf,
|
|
|
metadata: std::fs::Metadata,
|
|
|
}
|
|
|
|
|
|
impl DirEntry {
|
|
|
/// Returns **unsorted** entries in the given directory, with name and
|
|
|
/// metadata.
|
|
|
///
|
|
|
/// If a `.hg` sub-directory is encountered:
|
|
|
///
|
|
|
/// * At the repository root, ignore that sub-directory
|
|
|
/// * Elsewhere, we’re listing the content of a sub-repo. Return an empty
|
|
|
/// list instead.
|
|
|
fn read_dir(path: &Path, is_at_repo_root: bool) -> io::Result<Vec<Self>> {
|
|
|
// `read_dir` returns a "not found" error for the empty path
|
|
|
let at_cwd = path == Path::new("");
|
|
|
let read_dir_path = if at_cwd { Path::new(".") } else { path };
|
|
|
let mut results = Vec::new();
|
|
|
for entry in read_dir_path.read_dir()? {
|
|
|
let entry = entry?;
|
|
|
let metadata = match entry.metadata() {
|
|
|
Ok(v) => v,
|
|
|
Err(e) => {
|
|
|
// race with file deletion?
|
|
|
if e.kind() == std::io::ErrorKind::NotFound {
|
|
|
continue;
|
|
|
} else {
|
|
|
return Err(e);
|
|
|
}
|
|
|
}
|
|
|
};
|
|
|
let file_name = entry.file_name();
|
|
|
// FIXME don't do this when cached
|
|
|
if file_name == ".hg" {
|
|
|
if is_at_repo_root {
|
|
|
// Skip the repo’s own .hg (might be a symlink)
|
|
|
continue;
|
|
|
} else if metadata.is_dir() {
|
|
|
// A .hg sub-directory at another location means a subrepo,
|
|
|
// skip it entirely.
|
|
|
return Ok(Vec::new());
|
|
|
}
|
|
|
}
|
|
|
let full_path = if at_cwd {
|
|
|
file_name.clone().into()
|
|
|
} else {
|
|
|
entry.path()
|
|
|
};
|
|
|
let base_name = get_bytes_from_os_string(file_name).into();
|
|
|
results.push(DirEntry {
|
|
|
base_name,
|
|
|
full_path,
|
|
|
metadata,
|
|
|
})
|
|
|
}
|
|
|
Ok(results)
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/// Return the `mtime` of a temporary file newly-created in the `.hg` directory
|
|
|
/// of the give repository.
|
|
|
///
|
|
|
/// This is similar to `SystemTime::now()`, with the result truncated to the
|
|
|
/// same time resolution as other files’ modification times. Using `.hg`
|
|
|
/// instead of the system’s default temporary directory (such as `/tmp`) makes
|
|
|
/// it more likely the temporary file is in the same disk partition as contents
|
|
|
/// of the working directory, which can matter since different filesystems may
|
|
|
/// store timestamps with different resolutions.
|
|
|
///
|
|
|
/// This may fail, typically if we lack write permissions. In that case we
|
|
|
/// should continue the `status()` algoritm anyway and consider the current
|
|
|
/// date/time to be unknown.
|
|
|
fn filesystem_now(repo_root: &Path) -> Result<SystemTime, io::Error> {
|
|
|
tempfile::tempfile_in(repo_root.join(".hg"))?
|
|
|
.metadata()?
|
|
|
.modified()
|
|
|
}
|
|
|
|
