D7058: rust-dirstate-status: add first Rust implementation of `dirstate.status`
Alphare (Raphaël Gomès)
phabricator at mercurial-scm.org
Mon Oct 14 06:23:53 EDT 2019
Alphare updated this revision to Diff 17133.
REPOSITORY
rHG Mercurial
CHANGES SINCE LAST UPDATE
https://phab.mercurial-scm.org/D7058?vs=17132&id=17133
CHANGES SINCE LAST ACTION
https://phab.mercurial-scm.org/D7058/new/
REVISION DETAIL
https://phab.mercurial-scm.org/D7058
AFFECTED FILES
rust/Cargo.lock
rust/hg-core/Cargo.toml
rust/hg-core/src/dirstate.rs
rust/hg-core/src/dirstate/status.rs
rust/hg-core/src/lib.rs
rust/hg-core/src/utils/files.rs
CHANGE DETAILS
diff --git a/rust/hg-core/src/utils/files.rs b/rust/hg-core/src/utils/files.rs
--- a/rust/hg-core/src/utils/files.rs
+++ b/rust/hg-core/src/utils/files.rs
@@ -12,6 +12,7 @@
use crate::utils::hg_path::{HgPath, HgPathBuf};
use std::iter::FusedIterator;
+use std::fs::{read_link, Metadata};
use std::path::Path;
pub fn get_path_from_bytes(bytes: &[u8]) -> &Path {
@@ -79,6 +80,57 @@
path.to_ascii_lowercase()
}
+/// Get name in the case stored in the filesystem
+/// The name should be relative to root, and be normcase-ed for efficiency.
+///
+/// Note that this function is unnecessary, and should not be
+// called, for case-sensitive filesystems (simply because it's expensive).
+/// The root should be normcase-ed, too.
+pub fn filesystem_path<P: AsRef<HgPath>>(root: &HgPath, path: P) -> HgPathBuf {
+ // TODO path for case-insensitive filesystems, for now this is transparent
+ root.to_owned().join(path.as_ref())
+}
+
+/// Returns `true` if path refers to an existing path.
+/// Returns `true` for broken symbolic links.
+/// Equivalent to `exists()` on platforms lacking `lstat`.
+pub fn lexists<P: AsRef<Path>>(path: P) -> bool {
+ if !path.as_ref().exists() {
+ return read_link(path).is_ok();
+ }
+ true
+}
+
+#[derive(Eq, PartialEq, Ord, PartialOrd, Copy, Clone)]
+pub struct HgMetadata {
+ pub st_dev: u64,
+ pub st_mode: u32,
+ pub st_nlink: u64,
+ pub st_size: u64,
+ pub st_mtime: i64,
+ pub st_ctime: i64,
+}
+
+impl HgMetadata {
+ #[cfg(unix)]
+ pub fn from_metadata(metadata: Metadata) -> Self {
+ use std::os::linux::fs::MetadataExt;
+ Self {
+ st_dev: metadata.st_dev(),
+ st_mode: metadata.st_mode(),
+ st_nlink: metadata.st_nlink(),
+ st_size: metadata.st_size(),
+ st_mtime: metadata.st_mtime(),
+ st_ctime: metadata.st_ctime(),
+ }
+ }
+ #[cfg(not(unix))]
+ pub fn from_metdata(metadata: Metadata) -> Self {
+ // TODO support other platforms
+ unimplemented!()
+ }
+}
+
#[cfg(test)]
mod tests {
use super::*;
diff --git a/rust/hg-core/src/lib.rs b/rust/hg-core/src/lib.rs
--- a/rust/hg-core/src/lib.rs
+++ b/rust/hg-core/src/lib.rs
@@ -12,6 +12,7 @@
dirs_multiset::{DirsMultiset, DirsMultisetIter},
dirstate_map::DirstateMap,
parsers::{pack_dirstate, parse_dirstate, PARENT_SIZE},
+ status::status,
CopyMap, CopyMapIter, DirstateEntry, DirstateParents, EntryState,
StateMap, StateMapIter,
};
diff --git a/rust/hg-core/src/dirstate/status.rs b/rust/hg-core/src/dirstate/status.rs
new file mode 100644
--- /dev/null
+++ b/rust/hg-core/src/dirstate/status.rs
@@ -0,0 +1,254 @@
+// status.rs
+//
+// Copyright 2019 Raphaël Gomès <rgomes at octobus.net>
+//
+// This software may be used and distributed according to the terms of the
+// GNU General Public License version 2 or any later version.
+
+//! Rust implementation of dirstate.status (dirstate.py).
+//! It is currently missing a lot of functionality compared to the Python one
+//! and will only be triggered in narrow cases.
+
+use crate::utils::files::HgMetadata;
+use crate::utils::hg_path::{hg_path_to_path_buf, HgPathBuf};
+use crate::{DirstateEntry, DirstateMap, EntryState};
+use rayon::prelude::*;
+use std::collections::HashMap;
+use std::fs::Metadata;
+use std::path::Path;
+
+/// Get stat data about the files explicitly specified by match.
+/// TODO subrepos
+fn walk_explicit<P: AsRef<Path> + Sync>(
+ files: Vec<HgPathBuf>,
+ dmap: &mut DirstateMap,
+ root_dir: P,
+) -> std::io::Result<HashMap<HgPathBuf, Option<HgMetadata>>> {
+ let mut results = HashMap::new();
+
+ // A tuple of the normalized filename and the `Result` of the call to
+ // `symlink_metadata` for separate handling.
+ type WalkTuple<'a> = (&'a HgPathBuf, std::io::Result<Metadata>);
+
+ let stats_res: std::io::Result<Vec<WalkTuple>> = files
+ .par_iter()
+ .map(|filename| {
+ // TODO normalization
+ let normalized = filename;
+
+ let target_filename =
+ root_dir.as_ref().join(hg_path_to_path_buf(normalized)?);
+
+ Ok((normalized, target_filename.symlink_metadata()))
+ })
+ .collect();
+
+ for res in stats_res? {
+ match res {
+ (normalized, Ok(stat)) => {
+ if stat.is_file() {
+ results.insert(
+ normalized.to_owned(),
+ Some(HgMetadata::from_metadata(stat)),
+ );
+ } else {
+ if dmap.contains_key(normalized) {
+ results.insert(normalized.to_owned(), None);
+ }
+ }
+ }
+ (normalized, Err(_)) => {
+ if dmap.contains_key(normalized) {
+ results.insert(normalized.to_owned(), None);
+ }
+ }
+ };
+ }
+
+ Ok(results)
+}
+
+// Stat all entries in the `DirstateMap` and return their new metadata.
+pub fn stat_dmap_entries<P: AsRef<Path> + Sync>(
+ dmap: &DirstateMap,
+ results: &HashMap<HgPathBuf, Option<HgMetadata>>,
+ root_dir: P,
+) -> std::io::Result<Vec<(HgPathBuf, Option<HgMetadata>)>> {
+ dmap.par_iter()
+ .filter_map(
+ // Getting file metadata is costly, so we don't do it if the
+ // file is already present in the results, hence `filter_map`
+ |(filename, _)| -> Option<
+ std::io::Result<(HgPathBuf, Option<HgMetadata>)>
+ > {
+ if results.contains_key(filename) {
+ return None;
+ }
+ let meta = match hg_path_to_path_buf(filename) {
+ Ok(p) => root_dir.as_ref().join(p).symlink_metadata(),
+ Err(e) => return Some(Err(e.into())),
+ };
+
+ Some(match meta {
+ Ok(ref m)
+ if !(m.file_type().is_file()
+ || m.file_type().is_symlink()) =>
+ {
+ Ok((filename.to_owned(), None))
+ }
+ Ok(m) => Ok((
+ filename.to_owned(),
+ Some(HgMetadata::from_metadata(m)),
+ )),
+ Err(ref e)
+ if e.kind() == std::io::ErrorKind::NotFound
+ || e.raw_os_error() == Some(20) =>
+ {
+ // Rust does not yet have an `ErrorKind` for
+ // `NotADirectory` (errno 20)
+ Ok((filename.to_owned(), None))
+ }
+ Err(e) => Err(e),
+ })
+ },
+ )
+ .collect()
+}
+
+pub struct StatusResult {
+ pub modified: Vec<HgPathBuf>,
+ pub added: Vec<HgPathBuf>,
+ pub removed: Vec<HgPathBuf>,
+ pub deleted: Vec<HgPathBuf>,
+ pub clean: Vec<HgPathBuf>,
+ // TODO ignored
+ // TODO unknown
+}
+
+fn build_response(
+ dmap: &DirstateMap,
+ list_clean: bool,
+ last_normal_time: i64,
+ check_exec: bool,
+ results: HashMap<HgPathBuf, Option<HgMetadata>>,
+) -> ((Vec<HgPathBuf>, StatusResult)) {
+ let mut lookup = vec![];
+ let mut modified = vec![];
+ let mut added = vec![];
+ let mut removed = vec![];
+ let mut deleted = vec![];
+ let mut clean = vec![];
+
+ for (filename, metadata_option) in results.into_iter() {
+ let DirstateEntry {
+ state,
+ mode,
+ mtime,
+ size,
+ } = match dmap.get(&filename) {
+ None => {
+ continue;
+ }
+ Some(e) => *e,
+ };
+
+ match metadata_option {
+ None if match state {
+ EntryState::Normal
+ | EntryState::Merged
+ | EntryState::Added => true,
+ _ => false,
+ } =>
+ {
+ deleted.push(filename);
+ }
+ None => match state {
+ EntryState::Removed => removed.push(filename),
+ _ => {}
+ },
+ Some(HgMetadata {
+ st_mode,
+ st_size,
+ st_mtime,
+ ..
+ }) => {
+ match state {
+ EntryState::Normal => {
+ // Dates and times that are outside the 31-bit signed
+ // range are compared modulo 2^31. This should prevent
+ // it from behaving badly with very large files or
+ // corrupt dates while still having a high probability
+ // of detecting changes. (issue2608)
+ let range_mask = 0x7fffffff;
+
+ let size_changed = (size != st_size as i32)
+ && size != (st_size as i32 & range_mask);
+ let mode_changed = (mode ^ st_mode as i32) & 0o100
+ != 0o000
+ && check_exec;
+ if size >= 0
+ && (size_changed || mode_changed)
+ || size == -2 // other parent
+ || dmap.copy_map.contains_key(&filename)
+ {
+ modified.push(filename);
+ } else if mtime != st_mtime as i32
+ && mtime != (st_mtime as i32 & range_mask)
+ {
+ lookup.push(filename);
+ } else if st_mtime == last_normal_time {
+ // the file may have just been marked as normal and
+ // it may have changed in the same second without
+ // changing its size. This can happen if we quickly
+ // do multiple commits. Force lookup, so we don't
+ // miss such a racy file change.
+ lookup.push(filename);
+ } else if list_clean {
+ clean.push(filename);
+ }
+ }
+ EntryState::Merged => modified.push(filename),
+ EntryState::Added => added.push(filename),
+ EntryState::Removed => removed.push(filename),
+ EntryState::Unknown => {}
+ }
+ }
+ }
+ }
+
+ (
+ lookup,
+ StatusResult {
+ modified,
+ added,
+ removed,
+ deleted,
+ clean,
+ },
+ )
+}
+
+pub fn status<P: AsRef<Path>>(
+ mut dmap: &mut DirstateMap,
+ root_dir: P,
+ files: Vec<HgPathBuf>,
+ list_clean: bool,
+ last_normal_time: i64,
+ check_exec: bool,
+) -> std::io::Result<(Vec<HgPathBuf>, StatusResult)>
+where
+ P: Sync,
+{
+ let mut results =
+ walk_explicit(files, &mut dmap, root_dir.as_ref().to_owned())?;
+
+ results.extend(stat_dmap_entries(&dmap, &results, root_dir)?);
+
+ Ok(build_response(
+ &dmap,
+ list_clean,
+ last_normal_time,
+ check_exec,
+ results,
+ ))
+}
diff --git a/rust/hg-core/src/dirstate.rs b/rust/hg-core/src/dirstate.rs
--- a/rust/hg-core/src/dirstate.rs
+++ b/rust/hg-core/src/dirstate.rs
@@ -13,6 +13,7 @@
pub mod dirs_multiset;
pub mod dirstate_map;
pub mod parsers;
+pub mod status;
#[derive(Debug, PartialEq, Clone)]
pub struct DirstateParents {
diff --git a/rust/hg-core/Cargo.toml b/rust/hg-core/Cargo.toml
--- a/rust/hg-core/Cargo.toml
+++ b/rust/hg-core/Cargo.toml
@@ -15,3 +15,4 @@
rand = "> 0.6.4"
rand_pcg = "> 0.1.0"
regex = "^1.1"
+rayon = "1.2.0"
diff --git a/rust/Cargo.lock b/rust/Cargo.lock
--- a/rust/Cargo.lock
+++ b/rust/Cargo.lock
@@ -9,6 +9,14 @@
]
[[package]]
+name = "arrayvec"
+version = "0.4.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
name = "autocfg"
version = "0.1.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -24,6 +32,11 @@
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
+name = "cfg-if"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
name = "cloudabi"
version = "0.0.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -43,6 +56,50 @@
]
[[package]]
+name = "crossbeam-deque"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "crossbeam-epoch 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "crossbeam-epoch"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "arrayvec 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memoffset 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "scopeguard 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "crossbeam-queue"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.6.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "either"
+version = "1.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
name = "fuchsia-cprng"
version = "0.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -56,6 +113,7 @@
"memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
"rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
"rand_pcg 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
"regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
]
@@ -94,11 +152,32 @@
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
+name = "memoffset"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "nodrop"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
name = "num-traits"
version = "0.2.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
+name = "num_cpus"
+version = "1.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
name = "python27-sys"
version = "0.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -213,6 +292,28 @@
]
[[package]]
+name = "rayon"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "crossbeam-deque 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "either 1.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon-core 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rayon-core"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "crossbeam-deque 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-queue 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
name = "rdrand"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -249,6 +350,11 @@
]
[[package]]
+name = "scopeguard"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
name = "semver"
version = "0.9.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -300,16 +406,26 @@
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"checksum rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)" = "6d71dacdc3c88c1fde3885a3be3fbab9f35724e6ce99467f7d9c5026132184ca"
@@ -322,10 +438,13 @@
"checksum rand_os 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "b7c690732391ae0abafced5015ffb53656abfaec61b342290e5eb56b286a679d"
"checksum rand_pcg 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "086bd09a33c7044e56bb44d5bdde5a60e7f119a9e95b0775f545de759a32fe05"
"checksum rand_xorshift 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cbf7e9e623549b0e21f6e97cf8ecf247c1a8fd2e8a992ae265314300b2455d5c"
+"checksum rayon 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "83a27732a533a1be0a0035a111fe76db89ad312f6f0347004c220c57f209a123"
+"checksum rayon-core 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "98dcf634205083b17d0861252431eb2acbfb698ab7478a2d20de07954f47ec7b"
"checksum rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"
"checksum regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "37e7cbbd370869ce2e8dff25c7018702d10b21a20ef7135316f8daecd6c25b7f"
"checksum regex-syntax 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)" = "4e47a2ed29da7a9e1960e1639e7a982e6edc6d49be308a3b02daf511504a16d1"
"checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
+"checksum scopeguard 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b42e15e59b18a828bbf5c58ea01debb36b9b096346de35d941dcb89009f24a0d"
"checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
"checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
"checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
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