|
|
use crate::changelog::Changelog;
|
|
|
use crate::config::{Config, ConfigError, ConfigParseError};
|
|
|
use crate::dirstate::DirstateParents;
|
|
|
use crate::dirstate_tree::dirstate_map::DirstateMap;
|
|
|
use crate::dirstate_tree::on_disk::Docket as DirstateDocket;
|
|
|
use crate::dirstate_tree::owning::OwningDirstateMap;
|
|
|
use crate::errors::HgResultExt;
|
|
|
use crate::errors::{HgError, IoResultExt};
|
|
|
use crate::exit_codes;
|
|
|
use crate::lock::{try_with_lock_no_wait, LockError};
|
|
|
use crate::manifest::{Manifest, Manifestlog};
|
|
|
use crate::revlog::filelog::Filelog;
|
|
|
use crate::revlog::revlog::RevlogError;
|
|
|
use crate::utils::files::get_path_from_bytes;
|
|
|
use crate::utils::hg_path::HgPath;
|
|
|
use crate::utils::SliceExt;
|
|
|
use crate::vfs::{is_dir, is_file, Vfs};
|
|
|
use crate::{requirements, NodePrefix};
|
|
|
use crate::{DirstateError, Revision};
|
|
|
use std::cell::{Ref, RefCell, RefMut};
|
|
|
use std::collections::HashSet;
|
|
|
use std::io::Seek;
|
|
|
use std::io::SeekFrom;
|
|
|
use std::io::Write as IoWrite;
|
|
|
use std::path::{Path, PathBuf};
|
|
|
|
|
|
/// A repository on disk
|
|
|
pub struct Repo {
|
|
|
working_directory: PathBuf,
|
|
|
dot_hg: PathBuf,
|
|
|
store: PathBuf,
|
|
|
requirements: HashSet<String>,
|
|
|
config: Config,
|
|
|
dirstate_parents: LazyCell<DirstateParents, HgError>,
|
|
|
dirstate_data_file_uuid: LazyCell<Option<Vec<u8>>, HgError>,
|
|
|
dirstate_map: LazyCell<OwningDirstateMap, DirstateError>,
|
|
|
changelog: LazyCell<Changelog, HgError>,
|
|
|
manifestlog: LazyCell<Manifestlog, HgError>,
|
|
|
}
|
|
|
|
|
|
#[derive(Debug, derive_more::From)]
|
|
|
pub enum RepoError {
|
|
|
NotFound {
|
|
|
at: PathBuf,
|
|
|
},
|
|
|
#[from]
|
|
|
ConfigParseError(ConfigParseError),
|
|
|
#[from]
|
|
|
Other(HgError),
|
|
|
}
|
|
|
|
|
|
impl From<ConfigError> for RepoError {
|
|
|
fn from(error: ConfigError) -> Self {
|
|
|
match error {
|
|
|
ConfigError::Parse(error) => error.into(),
|
|
|
ConfigError::Other(error) => error.into(),
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
impl Repo {
|
|
|
/// tries to find nearest repository root in current working directory or
|
|
|
/// its ancestors
|
|
|
pub fn find_repo_root() -> Result<PathBuf, RepoError> {
|
|
|
let current_directory = crate::utils::current_dir()?;
|
|
|
// ancestors() is inclusive: it first yields `current_directory`
|
|
|
// as-is.
|
|
|
for ancestor in current_directory.ancestors() {
|
|
|
if is_dir(ancestor.join(".hg"))? {
|
|
|
return Ok(ancestor.to_path_buf());
|
|
|
}
|
|
|
}
|
|
|
return Err(RepoError::NotFound {
|
|
|
at: current_directory,
|
|
|
});
|
|
|
}
|
|
|
|
|
|
/// Find a repository, either at the given path (which must contain a `.hg`
|
|
|
/// sub-directory) or by searching the current directory and its
|
|
|
/// ancestors.
|
|
|
///
|
|
|
/// A method with two very different "modes" like this usually a code smell
|
|
|
/// to make two methods instead, but in this case an `Option` is what rhg
|
|
|
/// sub-commands get from Clap for the `-R` / `--repository` CLI argument.
|
|
|
/// Having two methods would just move that `if` to almost all callers.
|
|
|
pub fn find(
|
|
|
config: &Config,
|
|
|
explicit_path: Option<PathBuf>,
|
|
|
) -> Result<Self, RepoError> {
|
|
|
if let Some(root) = explicit_path {
|
|
|
if is_dir(root.join(".hg"))? {
|
|
|
Self::new_at_path(root.to_owned(), config)
|
|
|
} else if is_file(&root)? {
|
|
|
Err(HgError::unsupported("bundle repository").into())
|
|
|
} else {
|
|
|
Err(RepoError::NotFound {
|
|
|
at: root.to_owned(),
|
|
|
})
|
|
|
}
|
|
|
} else {
|
|
|
let root = Self::find_repo_root()?;
|
|
|
Self::new_at_path(root, config)
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/// To be called after checking that `.hg` is a sub-directory
|
|
|
fn new_at_path(
|
|
|
working_directory: PathBuf,
|
|
|
config: &Config,
|
|
|
) -> Result<Self, RepoError> {
|
|
|
let dot_hg = working_directory.join(".hg");
|
|
|
|
|
|
let mut repo_config_files = Vec::new();
|
|
|
repo_config_files.push(dot_hg.join("hgrc"));
|
|
|
repo_config_files.push(dot_hg.join("hgrc-not-shared"));
|
|
|
|
|
|
let hg_vfs = Vfs { base: &dot_hg };
|
|
|
let mut reqs = requirements::load_if_exists(hg_vfs)?;
|
|
|
let relative =
|
|
|
reqs.contains(requirements::RELATIVE_SHARED_REQUIREMENT);
|
|
|
let shared =
|
|
|
reqs.contains(requirements::SHARED_REQUIREMENT) || relative;
|
|
|
|
|
|
// From `mercurial/localrepo.py`:
|
|
|
//
|
|
|
// if .hg/requires contains the sharesafe requirement, it means
|
|
|
// there exists a `.hg/store/requires` too and we should read it
|
|
|
// NOTE: presence of SHARESAFE_REQUIREMENT imply that store requirement
|
|
|
// is present. We never write SHARESAFE_REQUIREMENT for a repo if store
|
|
|
// is not present, refer checkrequirementscompat() for that
|
|
|
//
|
|
|
// However, if SHARESAFE_REQUIREMENT is not present, it means that the
|
|
|
// repository was shared the old way. We check the share source
|
|
|
// .hg/requires for SHARESAFE_REQUIREMENT to detect whether the
|
|
|
// current repository needs to be reshared
|
|
|
let share_safe = reqs.contains(requirements::SHARESAFE_REQUIREMENT);
|
|
|
|
|
|
let store_path;
|
|
|
if !shared {
|
|
|
store_path = dot_hg.join("store");
|
|
|
} else {
|
|
|
let bytes = hg_vfs.read("sharedpath")?;
|
|
|
let mut shared_path =
|
|
|
get_path_from_bytes(bytes.trim_end_matches(|b| b == b'\n'))
|
|
|
.to_owned();
|
|
|
if relative {
|
|
|
shared_path = dot_hg.join(shared_path)
|
|
|
}
|
|
|
if !is_dir(&shared_path)? {
|
|
|
return Err(HgError::corrupted(format!(
|
|
|
".hg/sharedpath points to nonexistent directory {}",
|
|
|
shared_path.display()
|
|
|
))
|
|
|
.into());
|
|
|
}
|
|
|
|
|
|
store_path = shared_path.join("store");
|
|
|
|
|
|
let source_is_share_safe =
|
|
|
requirements::load(Vfs { base: &shared_path })?
|
|
|
.contains(requirements::SHARESAFE_REQUIREMENT);
|
|
|
|
|
|
if share_safe && !source_is_share_safe {
|
|
|
return Err(match config
|
|
|
.get(b"share", b"safe-mismatch.source-not-safe")
|
|
|
{
|
|
|
Some(b"abort") | None => HgError::abort(
|
|
|
"abort: share source does not support share-safe requirement\n\
|
|
|
(see `hg help config.format.use-share-safe` for more information)",
|
|
|
exit_codes::ABORT,
|
|
|
),
|
|
|
_ => HgError::unsupported("share-safe downgrade"),
|
|
|
}
|
|
|
.into());
|
|
|
} else if source_is_share_safe && !share_safe {
|
|
|
return Err(
|
|
|
match config.get(b"share", b"safe-mismatch.source-safe") {
|
|
|
Some(b"abort") | None => HgError::abort(
|
|
|
"abort: version mismatch: source uses share-safe \
|
|
|
functionality while the current share does not\n\
|
|
|
(see `hg help config.format.use-share-safe` for more information)",
|
|
|
exit_codes::ABORT,
|
|
|
),
|
|
|
_ => HgError::unsupported("share-safe upgrade"),
|
|
|
}
|
|
|
.into(),
|
|
|
);
|
|
|
}
|
|
|
|
|
|
if share_safe {
|
|
|
repo_config_files.insert(0, shared_path.join("hgrc"))
|
|
|
}
|
|
|
}
|
|
|
if share_safe {
|
|
|
reqs.extend(requirements::load(Vfs { base: &store_path })?);
|
|
|
}
|
|
|
|
|
|
let repo_config = if std::env::var_os("HGRCSKIPREPO").is_none() {
|
|
|
config.combine_with_repo(&repo_config_files)?
|
|
|
} else {
|
|
|
config.clone()
|
|
|
};
|
|
|
|
|
|
let repo = Self {
|
|
|
requirements: reqs,
|
|
|
working_directory,
|
|
|
store: store_path,
|
|
|
dot_hg,
|
|
|
config: repo_config,
|
|
|
dirstate_parents: LazyCell::new(Self::read_dirstate_parents),
|
|
|
dirstate_data_file_uuid: LazyCell::new(
|
|
|
Self::read_dirstate_data_file_uuid,
|
|
|
),
|
|
|
dirstate_map: LazyCell::new(Self::new_dirstate_map),
|
|
|
changelog: LazyCell::new(Changelog::open),
|
|
|
manifestlog: LazyCell::new(Manifestlog::open),
|
|
|
};
|
|
|
|
|
|
requirements::check(&repo)?;
|
|
|
|
|
|
Ok(repo)
|
|
|
}
|
|
|
|
|
|
pub fn working_directory_path(&self) -> &Path {
|
|
|
&self.working_directory
|
|
|
}
|
|
|
|
|
|
pub fn requirements(&self) -> &HashSet<String> {
|
|
|
&self.requirements
|
|
|
}
|
|
|
|
|
|
pub fn config(&self) -> &Config {
|
|
|
&self.config
|
|
|
}
|
|
|
|
|
|
/// For accessing repository files (in `.hg`), except for the store
|
|
|
/// (`.hg/store`).
|
|
|
pub fn hg_vfs(&self) -> Vfs<'_> {
|
|
|
Vfs { base: &self.dot_hg }
|
|
|
}
|
|
|
|
|
|
/// For accessing repository store files (in `.hg/store`)
|
|
|
pub fn store_vfs(&self) -> Vfs<'_> {
|
|
|
Vfs { base: &self.store }
|
|
|
}
|
|
|
|
|
|
/// For accessing the working copy
|
|
|
pub fn working_directory_vfs(&self) -> Vfs<'_> {
|
|
|
Vfs {
|
|
|
base: &self.working_directory,
|
|
|
}
|
|
|
}
|
|
|
|
|
|
pub fn try_with_wlock_no_wait<R>(
|
|
|
&self,
|
|
|
f: impl FnOnce() -> R,
|
|
|
) -> Result<R, LockError> {
|
|
|
try_with_lock_no_wait(self.hg_vfs(), "wlock", f)
|
|
|
}
|
|
|
|
|
|
pub fn has_dirstate_v2(&self) -> bool {
|
|
|
self.requirements
|
|
|
.contains(requirements::DIRSTATE_V2_REQUIREMENT)
|
|
|
}
|
|
|
|
|
|
pub fn has_sparse(&self) -> bool {
|
|
|
self.requirements.contains(requirements::SPARSE_REQUIREMENT)
|
|
|
}
|
|
|
|
|
|
pub fn has_narrow(&self) -> bool {
|
|
|
self.requirements.contains(requirements::NARROW_REQUIREMENT)
|
|
|
}
|
|
|
|
|
|
fn dirstate_file_contents(&self) -> Result<Vec<u8>, HgError> {
|
|
|
Ok(self
|
|
|
.hg_vfs()
|
|
|
.read("dirstate")
|
|
|
.io_not_found_as_none()?
|
|
|
.unwrap_or(Vec::new()))
|
|
|
}
|
|
|
|
|
|
pub fn dirstate_parents(&self) -> Result<DirstateParents, HgError> {
|
|
|
Ok(*self.dirstate_parents.get_or_init(self)?)
|
|
|
}
|
|
|
|
|
|
fn read_dirstate_parents(&self) -> Result<DirstateParents, HgError> {
|
|
|
let dirstate = self.dirstate_file_contents()?;
|
|
|
let parents = if dirstate.is_empty() {
|
|
|
if self.has_dirstate_v2() {
|
|
|
self.dirstate_data_file_uuid.set(None);
|
|
|
}
|
|
|
DirstateParents::NULL
|
|
|
} else if self.has_dirstate_v2() {
|
|
|
let docket =
|
|
|
crate::dirstate_tree::on_disk::read_docket(&dirstate)?;
|
|
|
self.dirstate_data_file_uuid
|
|
|
.set(Some(docket.uuid.to_owned()));
|
|
|
docket.parents()
|
|
|
} else {
|
|
|
crate::dirstate::parsers::parse_dirstate_parents(&dirstate)?
|
|
|
.clone()
|
|
|
};
|
|
|
self.dirstate_parents.set(parents);
|
|
|
Ok(parents)
|
|
|
}
|
|
|
|
|
|
fn read_dirstate_data_file_uuid(
|
|
|
&self,
|
|
|
) -> Result<Option<Vec<u8>>, HgError> {
|
|
|
assert!(
|
|
|
self.has_dirstate_v2(),
|
|
|
"accessing dirstate data file ID without dirstate-v2"
|
|
|
);
|
|
|
let dirstate = self.dirstate_file_contents()?;
|
|
|
if dirstate.is_empty() {
|
|
|
self.dirstate_parents.set(DirstateParents::NULL);
|
|
|
Ok(None)
|
|
|
} else {
|
|
|
let docket =
|
|
|
crate::dirstate_tree::on_disk::read_docket(&dirstate)?;
|
|
|
self.dirstate_parents.set(docket.parents());
|
|
|
Ok(Some(docket.uuid.to_owned()))
|
|
|
}
|
|
|
}
|
|
|
|
|
|
fn new_dirstate_map(&self) -> Result<OwningDirstateMap, DirstateError> {
|
|
|
let dirstate_file_contents = self.dirstate_file_contents()?;
|
|
|
if dirstate_file_contents.is_empty() {
|
|
|
self.dirstate_parents.set(DirstateParents::NULL);
|
|
|
if self.has_dirstate_v2() {
|
|
|
self.dirstate_data_file_uuid.set(None);
|
|
|
}
|
|
|
Ok(OwningDirstateMap::new_empty(Vec::new()))
|
|
|
} else if self.has_dirstate_v2() {
|
|
|
let docket = crate::dirstate_tree::on_disk::read_docket(
|
|
|
&dirstate_file_contents,
|
|
|
)?;
|
|
|
self.dirstate_parents.set(docket.parents());
|
|
|
self.dirstate_data_file_uuid
|
|
|
.set(Some(docket.uuid.to_owned()));
|
|
|
let data_size = docket.data_size();
|
|
|
let metadata = docket.tree_metadata();
|
|
|
let mut map = if let Some(data_mmap) = self
|
|
|
.hg_vfs()
|
|
|
.mmap_open(docket.data_filename())
|
|
|
.io_not_found_as_none()?
|
|
|
{
|
|
|
OwningDirstateMap::new_empty(data_mmap)
|
|
|
} else {
|
|
|
OwningDirstateMap::new_empty(Vec::new())
|
|
|
};
|
|
|
let (on_disk, placeholder) = map.get_pair_mut();
|
|
|
*placeholder = DirstateMap::new_v2(on_disk, data_size, metadata)?;
|
|
|
Ok(map)
|
|
|
} else {
|
|
|
let mut map = OwningDirstateMap::new_empty(dirstate_file_contents);
|
|
|
let (on_disk, placeholder) = map.get_pair_mut();
|
|
|
let (inner, parents) = DirstateMap::new_v1(on_disk)?;
|
|
|
self.dirstate_parents
|
|
|
.set(parents.unwrap_or(DirstateParents::NULL));
|
|
|
*placeholder = inner;
|
|
|
Ok(map)
|
|
|
}
|
|
|
}
|
|
|
|
|
|
pub fn dirstate_map(
|
|
|
&self,
|
|
|
) -> Result<Ref<OwningDirstateMap>, DirstateError> {
|
|
|
self.dirstate_map.get_or_init(self)
|
|
|
}
|
|
|
|
|
|
pub fn dirstate_map_mut(
|
|
|
&self,
|
|
|
) -> Result<RefMut<OwningDirstateMap>, DirstateError> {
|
|
|
self.dirstate_map.get_mut_or_init(self)
|
|
|
}
|
|
|
|
|
|
pub fn changelog(&self) -> Result<Ref<Changelog>, HgError> {
|
|
|
self.changelog.get_or_init(self)
|
|
|
}
|
|
|
|
|
|
pub fn changelog_mut(&self) -> Result<RefMut<Changelog>, HgError> {
|
|
|
self.changelog.get_mut_or_init(self)
|
|
|
}
|
|
|
|
|
|
pub fn manifestlog(&self) -> Result<Ref<Manifestlog>, HgError> {
|
|
|
self.manifestlog.get_or_init(self)
|
|
|
}
|
|
|
|
|
|
pub fn manifestlog_mut(&self) -> Result<RefMut<Manifestlog>, HgError> {
|
|
|
self.manifestlog.get_mut_or_init(self)
|
|
|
}
|
|
|
|
|
|
/// Returns the manifest of the *changeset* with the given node ID
|
|
|
pub fn manifest_for_node(
|
|
|
&self,
|
|
|
node: impl Into<NodePrefix>,
|
|
|
) -> Result<Manifest, RevlogError> {
|
|
|
self.manifestlog()?.data_for_node(
|
|
|
self.changelog()?
|
|
|
.data_for_node(node.into())?
|
|
|
.manifest_node()?
|
|
|
.into(),
|
|
|
)
|
|
|
}
|
|
|
|
|
|
/// Returns the manifest of the *changeset* with the given revision number
|
|
|
pub fn manifest_for_rev(
|
|
|
&self,
|
|
|
revision: Revision,
|
|
|
) -> Result<Manifest, RevlogError> {
|
|
|
self.manifestlog()?.data_for_node(
|
|
|
self.changelog()?
|
|
|
.data_for_rev(revision)?
|
|
|
.manifest_node()?
|
|
|
.into(),
|
|
|
)
|
|
|
}
|
|
|
|
|
|
pub fn filelog(&self, path: &HgPath) -> Result<Filelog, HgError> {
|
|
|
Filelog::open(self, path)
|
|
|
}
|
|
|
|
|
|
/// Write to disk any updates that were made through `dirstate_map_mut`.
|
|
|
///
|
|
|
/// The "wlock" must be held while calling this.
|
|
|
/// See for example `try_with_wlock_no_wait`.
|
|
|
///
|
|
|
/// TODO: have a `WritableRepo` type only accessible while holding the
|
|
|
/// lock?
|
|
|
pub fn write_dirstate(&self) -> Result<(), DirstateError> {
|
|
|
let map = self.dirstate_map()?;
|
|
|
// TODO: Maintain a `DirstateMap::dirty` flag, and return early here if
|
|
|
// it’s unset
|
|
|
let parents = self.dirstate_parents()?;
|
|
|
let packed_dirstate = if self.has_dirstate_v2() {
|
|
|
let uuid = self.dirstate_data_file_uuid.get_or_init(self)?;
|
|
|
let mut uuid = uuid.as_ref();
|
|
|
let can_append = uuid.is_some();
|
|
|
let (data, tree_metadata, append) = map.pack_v2(can_append)?;
|
|
|
if !append {
|
|
|
uuid = None
|
|
|
}
|
|
|
let uuid = if let Some(uuid) = uuid {
|
|
|
std::str::from_utf8(uuid)
|
|
|
.map_err(|_| {
|
|
|
HgError::corrupted("non-UTF-8 dirstate data file ID")
|
|
|
})?
|
|
|
.to_owned()
|
|
|
} else {
|
|
|
DirstateDocket::new_uid()
|
|
|
};
|
|
|
let data_filename = format!("dirstate.{}", uuid);
|
|
|
let data_filename = self.hg_vfs().join(data_filename);
|
|
|
let mut options = std::fs::OpenOptions::new();
|
|
|
if append {
|
|
|
options.append(true);
|
|
|
} else {
|
|
|
options.write(true).create_new(true);
|
|
|
}
|
|
|
let data_size = (|| {
|
|
|
// TODO: loop and try another random ID if !append and this
|
|
|
// returns `ErrorKind::AlreadyExists`? Collision chance of two
|
|
|
// random IDs is one in 2**32
|
|
|
let mut file = options.open(&data_filename)?;
|
|
|
file.write_all(&data)?;
|
|
|
file.flush()?;
|
|
|
// TODO: use https://doc.rust-lang.org/std/io/trait.Seek.html#method.stream_position when we require Rust 1.51+
|
|
|
file.seek(SeekFrom::Current(0))
|
|
|
})()
|
|
|
.when_writing_file(&data_filename)?;
|
|
|
DirstateDocket::serialize(
|
|
|
parents,
|
|
|
tree_metadata,
|
|
|
data_size,
|
|
|
uuid.as_bytes(),
|
|
|
)
|
|
|
.map_err(|_: std::num::TryFromIntError| {
|
|
|
HgError::corrupted("overflow in dirstate docket serialization")
|
|
|
})?
|
|
|
} else {
|
|
|
map.pack_v1(parents)?
|
|
|
};
|
|
|
self.hg_vfs().atomic_write("dirstate", &packed_dirstate)?;
|
|
|
Ok(())
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/// Lazily-initialized component of `Repo` with interior mutability
|
|
|
///
|
|
|
/// This differs from `OnceCell` in that the value can still be "deinitialized"
|
|
|
/// later by setting its inner `Option` to `None`.
|
|
|
struct LazyCell<T, E> {
|
|
|
value: RefCell<Option<T>>,
|
|
|
// `Fn`s that don’t capture environment are zero-size, so this box does
|
|
|
// not allocate:
|
|
|
init: Box<dyn Fn(&Repo) -> Result<T, E>>,
|
|
|
}
|
|
|
|
|
|
impl<T, E> LazyCell<T, E> {
|
|
|
fn new(init: impl Fn(&Repo) -> Result<T, E> + 'static) -> Self {
|
|
|
Self {
|
|
|
value: RefCell::new(None),
|
|
|
init: Box::new(init),
|
|
|
}
|
|
|
}
|
|
|
|
|
|
fn set(&self, value: T) {
|
|
|
*self.value.borrow_mut() = Some(value)
|
|
|
}
|
|
|
|
|
|
fn get_or_init(&self, repo: &Repo) -> Result<Ref<T>, E> {
|
|
|
let mut borrowed = self.value.borrow();
|
|
|
if borrowed.is_none() {
|
|
|
drop(borrowed);
|
|
|
// Only use `borrow_mut` if it is really needed to avoid panic in
|
|
|
// case there is another outstanding borrow but mutation is not
|
|
|
// needed.
|
|
|
*self.value.borrow_mut() = Some((self.init)(repo)?);
|
|
|
borrowed = self.value.borrow()
|
|
|
}
|
|
|
Ok(Ref::map(borrowed, |option| option.as_ref().unwrap()))
|
|
|
}
|
|
|
|
|
|
fn get_mut_or_init(&self, repo: &Repo) -> Result<RefMut<T>, E> {
|
|
|
let mut borrowed = self.value.borrow_mut();
|
|
|
if borrowed.is_none() {
|
|
|
*borrowed = Some((self.init)(repo)?);
|
|
|
}
|
|
|
Ok(RefMut::map(borrowed, |option| option.as_mut().unwrap()))
|
|
|
}
|
|
|
}
|
|
|
|
