This is an archive of the discontinued Mercurial Phabricator instance.

rust/rhg/src/blackbox.rs
61	Right. This comment was obsolete anyway so I’ve removed it. (`date-format` is part of this commit and there’s not quoting in config syntax outside of list-values, see previous commit.)
116	Oh do you mean that `(glob)` expected output in `.t` files makes it hard to expect a literal `?` character? https://docs.rs/users/0.11.0/users/fn.get_current_username.html says “This function to return `None` if the current user does not exist, which could happen if they were deleted after the program started running.” so I don’t expect this `???` fallback to show up a lot in practice and I think it’s not worth testing it.

SimonSapin marked an inline comment as done.Feb 19 2021, 3:31 AM

SimonSapin added a child revision: D10021: rust: Move config value parsing functions to a new module.

SimonSapin updated this revision to Diff 25661.

Alphare accepted this revision.Feb 19 2021, 4:05 AM

Alphare added inline comments.

rust/rhg/src/blackbox.rs
116	I don't think it's worth testing either, I just meant I would have chosen a different set of characters just to avoid confusion. It's not a dealbreaker.

✅ refresh by Heptapod after a successful CI run (🐙 💚)

SimonSapin added a commit: rHG4781012afdcf: rhg: Add support for the blackbox extension.Feb 24 2021, 11:10 AM

This revision was not accepted when it landed; it landed in state Needs Review.

Closed by commit rHG4781012afdcf: rhg: Add support for the blackbox extension (authored by SimonSapin). · Explain Why

This revision was automatically updated to reflect the committed changes.

SimonSapin added a commit: rHG755c31a1caf9: rhg: Add support for the blackbox extension.Feb 24 2021, 12:11 PM

Revision Contents
Changeset List

		Path
M		rust/Cargo.lock (35 lines)
M		rust/hg-core/src/dirstate/parsers.rs (8 lines)
M		rust/hg-core/src/repo.rs (9 lines)
M		rust/hg-core/src/utils.rs (29 lines)
M		rust/rhg/Cargo.toml (2 lines)
A	M	rust/rhg/src/blackbox.rs (161 lines)
M		rust/rhg/src/main.rs (48 lines)
M		tests/test-rhg.t (12 lines)

Diff	ID	Description	Created	Lint	Unit
Base		Base
Diff 1	25649		Feb 17 2021, 7:58 AM	★	★
Diff 2	25661		Feb 19 2021, 3:31 AM	★	★
Diff 3	25680		Feb 19 2021, 6:29 AM	★	★
Diff 4	25879	rHG4781012afdcfaa4297dd3d6480046f6212e83584	Feb 16 2021, 7:08 AM	★	★

Commit	Parents	Author	Summary	Date
9dec02ee2bc6	1558b07cc6b3	Simon Sapin		Feb 16 2021, 7:08 AM

Status	Author	Revision
Closed	SimonSapin	D10022 rust: Add some unit tests for parse_byte_size in config
Closed	SimonSapin	D10021 rust: Move config value parsing functions to a new module
Closed	SimonSapin	D10012 rhg: Add support for the blackbox extension
Closed	SimonSapin	D10011 blackbox: Remove misleading quotes in config example
Closed	SimonSapin	D10010 rust: Add a log file rotation utility
Closed	SimonSapin	D10009 rust: Add a `ConfigValueParseError` variant to common errors
Closed	SimonSapin	D10008 rust: Add config parsing support for more value types
Closed	SimonSapin	D10007 rust: Introduce a get_bytes_from_os_str utility function
Closed	SimonSapin	D10006 rust: Make `DirstateParents`’s fields typed `Node`s
Closed	SimonSapin	D10005 rust: Rewrite dirstate parsing usin the `bytes-cast` crate
Closed	SimonSapin	D10004 rhg: Move `Repo` object creation into `main()`
Closed	SimonSapin	D10003 rhg: Group values passed to every sub-command into a struct
Closed	SimonSapin	D10002 rhg: Remove error message on unsupported CLI arguments

Diff 25661

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rust/hg-core/src/dirstate/parsers.rs

	const MIN_ENTRY_SIZE: usize = 17;			const MIN_ENTRY_SIZE: usize = 17;

	type ParseResult<'a> = (			type ParseResult<'a> = (
	&'a DirstateParents,			&'a DirstateParents,
	Vec<(&'a HgPath, DirstateEntry)>,			Vec<(&'a HgPath, DirstateEntry)>,
	Vec<(&'a HgPath, &'a HgPath)>,			Vec<(&'a HgPath, &'a HgPath)>,
	);			);

				pub fn parse_dirstate_parents(
				contents: &[u8],
				) -> Result<&DirstateParents, HgError> {
				let (parents, _rest) = DirstateParents::from_bytes(contents)
				.map_err(\|_\| HgError::corrupted("Too little data for dirstate."))?;
				Ok(parents)
				}

	#[timed]			#[timed]
	pub fn parse_dirstate(mut contents: &[u8]) -> Result<ParseResult, HgError> {			pub fn parse_dirstate(mut contents: &[u8]) -> Result<ParseResult, HgError> {
	let mut copies = Vec::new();			let mut copies = Vec::new();
	let mut entries = Vec::new();			let mut entries = Vec::new();

	let (parents, rest) = DirstateParents::from_bytes(contents)			let (parents, rest) = DirstateParents::from_bytes(contents)
	.map_err(\|_\| HgError::corrupted("Too little data for dirstate."))?;			.map_err(\|_\| HgError::corrupted("Too little data for dirstate."))?;
	contents = rest;			contents = rest;

rust/hg-core/src/repo.rs


	// The undescore prefix silences the "never used" warning. Remove before			// The undescore prefix silences the "never used" warning. Remove before
	// using.			// using.
	pub fn _working_directory_vfs(&self) -> Vfs<'_> {			pub fn _working_directory_vfs(&self) -> Vfs<'_> {
	Vfs {			Vfs {
	base: &self.working_directory,			base: &self.working_directory,
	}			}
	}			}

				pub fn dirstate_parents(
				&self,
				) -> Result<crate::dirstate::DirstateParents, HgError> {
				let dirstate = self.hg_vfs().mmap_open("dirstate")?;
				let parents =
				crate::dirstate::parsers::parse_dirstate_parents(&dirstate)?;
				Ok(parents.clone())
				}
	}			}

	impl Vfs<'_> {			impl Vfs<'_> {
	pub fn join(&self, relative_path: impl AsRef<Path>) -> PathBuf {			pub fn join(&self, relative_path: impl AsRef<Path>) -> PathBuf {
	self.base.join(relative_path)			self.base.join(relative_path)
	}			}

	pub fn read(			pub fn read(

rust/hg-core/src/utils.rs

	pub(crate) fn strip_suffix<'a>(s: &'a str, suffix: &str) -> Option<&'a str> {			pub(crate) fn strip_suffix<'a>(s: &'a str, suffix: &str) -> Option<&'a str> {
	if s.ends_with(suffix) {			if s.ends_with(suffix) {
	Some(&s[..s.len() - suffix.len()])			Some(&s[..s.len() - suffix.len()])
	} else {			} else {
	None			None
	}			}
	}			}

				#[cfg(unix)]
				pub fn shell_quote(value: &[u8]) -> Vec<u8> {
				// TODO: Use the `matches!` macro when we require Rust 1.42+
				if value.iter().all(\|&byte\| match byte {
				b'a'..=b'z'
				\| b'A'..=b'Z'
				\| b'0'..=b'9'
				\| b'.'
				\| b'_'
				\| b'/'
				\| b'+'
				\| b'-' => true,
				_ => false,
				}) {
				value.to_owned()
				} else {
				let mut quoted = Vec::with_capacity(value.len() + 2);
				quoted.push(b'\'');
				for &byte in value {
				if byte == b'\'' {
				quoted.push(b'\\');
				}
				quoted.push(byte);
				}
				quoted.push(b'\'');
				quoted
				}
				}

	pub fn current_dir() -> Result<std::path::PathBuf, HgError> {			pub fn current_dir() -> Result<std::path::PathBuf, HgError> {
	std::env::current_dir().map_err(\|error\| HgError::IoError {			std::env::current_dir().map_err(\|error\| HgError::IoError {
	error,			error,
	context: IoErrorContext::CurrentDir,			context: IoErrorContext::CurrentDir,
	})			})
	}			}

	pub fn current_exe() -> Result<std::path::PathBuf, HgError> {			pub fn current_exe() -> Result<std::path::PathBuf, HgError> {
	std::env::current_exe().map_err(\|error\| HgError::IoError {			std::env::current_exe().map_err(\|error\| HgError::IoError {
	error,			error,
	context: IoErrorContext::CurrentExe,			context: IoErrorContext::CurrentExe,
	})			})
	}			}

rust/rhg/Cargo.toml

	[package]			[package]
	name = "rhg"			name = "rhg"
	version = "0.1.0"			version = "0.1.0"
	authors = [			authors = [
	"Antoine Cezar <antoine.cezar@octobus.net>",			"Antoine Cezar <antoine.cezar@octobus.net>",
	"Raphaël Gomès <raphael.gomes@octobus.net>",			"Raphaël Gomès <raphael.gomes@octobus.net>",
	]			]
	edition = "2018"			edition = "2018"

	[dependencies]			[dependencies]
	hg-core = { path = "../hg-core"}			hg-core = { path = "../hg-core"}
				chrono = "0.4.19"
	clap = "2.33.1"			clap = "2.33.1"
	derive_more = "0.99"			derive_more = "0.99"
	log = "0.4.11"			log = "0.4.11"
	micro-timer = "0.3.1"			micro-timer = "0.3.1"
	env_logger = "0.7.1"			env_logger = "0.7.1"
	format-bytes = "0.2.0"			format-bytes = "0.2.0"
				users = "0.11.0"

rust/rhg/src/blackbox.rs

This file was added.

				//! Logging for repository events, including commands run in the repository.

				use crate::CliInvocation;
				use format_bytes::format_bytes;
				use hg::errors::HgError;
				use hg::repo::Repo;
				use hg::utils::{files::get_bytes_from_os_str, shell_quote};

				const ONE_MEBIBYTE: u64 = 1 << 20;

				// TODO: somehow keep defaults in sync with `configitem` in `hgext/blackbox.py`
				const DEFAULT_MAX_SIZE: u64 = ONE_MEBIBYTE;
				const DEFAULT_MAX_FILES: u32 = 7;

				// Python does not support %.3f, only %f
				const DEFAULT_DATE_FORMAT: &str = "%Y/%m/%d %H:%M:%S%.3f";

				type DateTime = chrono::DateTime<chrono::Local>;

				pub struct ProcessStartTime {
				/// For measuring duration
				monotonic_clock: std::time::Instant,
				/// For formatting with year, month, day, etc.
				calendar_based: DateTime,
				}

				impl ProcessStartTime {
				pub fn now() -> Self {
				Self {
				monotonic_clock: std::time::Instant::now(),
				calendar_based: chrono::Local::now(),
				}
				}
				}

				pub struct Blackbox<'a> {
				process_start_time: &'a ProcessStartTime,
				/// Do nothing if this is `None`
				configured: Option<ConfiguredBlackbox<'a>>,
				}

				struct ConfiguredBlackbox<'a> {
				repo: &'a Repo,
				max_size: u64,
				max_files: u32,
				date_format: &'a str,
				}

				impl<'a> Blackbox<'a> {
				pub fn new(
				invocation: &'a CliInvocation<'a>,
				process_start_time: &'a ProcessStartTime,
				) -> Result<Self, HgError> {
				let configured = if let Ok(repo) = invocation.repo {
				let config = invocation.config();
				if config.get(b"extensions", b"blackbox").is_none() {
				// The extension is not enabled
				None
				} else {
				Some(ConfiguredBlackbox {
				repo,
				AlphareUnsubmitted Done You've got a NBSP here ;) Alphare: You've got a NBSP here ;)
				SimonSapinAuthorUnsubmitted Done Right. This comment was obsolete anyway so I’ve removed it. (`date-format` is part of this commit and there’s not quoting in config syntax outside of list-values, see previous commit.) SimonSapin: Right. This comment was obsolete anyway so I’ve removed it. (`date-format` is part of this…
				max_size: config
				.get_byte_size(b"blackbox", b"maxsize")?
				.unwrap_or(DEFAULT_MAX_SIZE),
				max_files: config
				.get_u32(b"blackbox", b"maxfiles")?
				.unwrap_or(DEFAULT_MAX_FILES),
				date_format: config
				.get_str(b"blackbox", b"date-format")?
				.unwrap_or(DEFAULT_DATE_FORMAT),
				})
				}
				} else {
				// Without a local repository there’s no `.hg/blackbox.log` to
				// write to.
				None
				};
				Ok(Self {
				process_start_time,
				configured,
				})
				}

				pub fn log_command_start(&self) {
				if let Some(configured) = &self.configured {
				let message = format_bytes!(b"(rust) {}", format_cli_args());
				configured.log(&self.process_start_time.calendar_based, &message);
				}
				}

				pub fn log_command_end(&self, exit_code: i32) {
				if let Some(configured) = &self.configured {
				let now = chrono::Local::now();
				let duration = self
				.process_start_time
				.monotonic_clock
				.elapsed()
				.as_secs_f64();
				let message = format_bytes!(
				b"(rust) {} exited {} after {} seconds",
				format_cli_args(),
				exit_code,
				format_bytes::Utf8(format_args!("{:.03}", duration))
				);
				configured.log(&now, &message);
				}
				}
				}

				impl ConfiguredBlackbox<'_> {
				fn log(&self, date_time: &DateTime, message: &[u8]) {
				let date = format_bytes::Utf8(date_time.format(self.date_format));
				let user = users::get_current_username().map(get_bytes_from_os_str);
				let user = user.as_deref().unwrap_or(b"???");
				let rev = format_bytes::Utf8(match self.repo.dirstate_parents() {
				Ok(parents) if parents.p2 == hg::revlog::node::NULL_NODE => {
				AlphareUnsubmitted Not Done Problem with this is that it conflicts with `.t` output. Or was it intentional? Alphare: Problem with this is that it conflicts with `.t` output. Or was it intentional?
				SimonSapinAuthorUnsubmitted Done Oh do you mean that `(glob)` expected output in `.t` files makes it hard to expect a literal `?` character? https://docs.rs/users/0.11.0/users/fn.get_current_username.html says “This function to return `None` if the current user does not exist, which could happen if they were deleted after the program started running.” so I don’t expect this `???` fallback to show up a lot in practice and I think it’s not worth testing it. SimonSapin: Oh do you mean that `(glob)` expected output in `.t` files makes it hard to expect a literal `?
				AlphareUnsubmitted Not Done I don't think it's worth testing either, I just meant I would have chosen a different set of characters just to avoid confusion. It's not a dealbreaker. Alphare: I don't think it's worth testing either, I just meant I would have chosen a different set of…
				format!("{:x}", parents.p1)
				}
				Ok(parents) => format!("{:x}+{:x}", parents.p1, parents.p2),
				Err(_dirstate_corruption_error) => {
				// TODO: log a non-fatal warning to stderr
				"???".to_owned()
				}
				});
				let pid = std::process::id();
				let line = format_bytes!(
				b"{} {} @{} ({})> {}\n",
				date,
				user,
				rev,
				pid,
				message
				);
				let result =
				hg::logging::LogFile::new(self.repo.hg_vfs(), "blackbox.log")
				.max_size(Some(self.max_size))
				.max_files(self.max_files)
				.write(&line);
				match result {
				Ok(()) => {}
				Err(_io_error) => {
				// TODO: log a non-fatal warning to stderr
				}
				}
				}
				}

				fn format_cli_args() -> Vec<u8> {
				let mut args = std::env::args_os();
				let _ = args.next(); // Skip the first (or zeroth) arg, the name of the `rhg` executable
				let mut args = args.map(\|arg\| shell_quote(&get_bytes_from_os_str(arg)));
				let mut formatted = Vec::new();
				if let Some(arg) = args.next() {
				formatted.extend(arg)
				}
				for arg in args {
				formatted.push(b' ');
				formatted.extend(arg)
				}
				formatted
				}

rust/rhg/src/main.rs

	extern crate log;			extern crate log;
	use crate::ui::Ui;			use crate::ui::Ui;
	use clap::App;			use clap::App;
	use clap::AppSettings;			use clap::AppSettings;
	use clap::Arg;			use clap::Arg;
	use clap::ArgMatches;			use clap::ArgMatches;
	use format_bytes::format_bytes;			use format_bytes::format_bytes;
	use hg::config::Config;			use hg::config::Config;
	use hg::repo::{Repo, RepoError};			use hg::repo::{Repo, RepoError};
	use std::path::{Path, PathBuf};			use std::path::{Path, PathBuf};

				mod blackbox;
	mod error;			mod error;
	mod exitcode;			mod exitcode;
	mod ui;			mod ui;
	use error::CommandError;			use error::CommandError;

	fn add_global_args<'a, 'b>(app: App<'a, 'b>) -> App<'a, 'b> {			fn add_global_args<'a, 'b>(app: App<'a, 'b>) -> App<'a, 'b> {
	app.arg(			app.arg(
	Arg::with_name("repository")			Arg::with_name("repository")
	.takes_value(true)			.takes_value(true)
	// Ok: `--config section.key1=val --config section.key2=val2`			// Ok: `--config section.key1=val --config section.key2=val2`
	.multiple(true)			.multiple(true)
	// Not ok: `--config section.key1=val section.key2=val2`			// Not ok: `--config section.key1=val section.key2=val2`
	.number_of_values(1),			.number_of_values(1),
	)			)
	}			}

	fn main_with_result(ui: &ui::Ui) -> Result<(), CommandError> {			fn main_with_result(
				ui: &ui::Ui,
				process_start_time: &blackbox::ProcessStartTime,
				) -> Result<(), CommandError> {
	env_logger::init();			env_logger::init();
	let app = App::new("rhg")			let app = App::new("rhg")
	.setting(AppSettings::AllowInvalidUtf8)			.setting(AppSettings::AllowInvalidUtf8)
	.setting(AppSettings::SubcommandRequired)			.setting(AppSettings::SubcommandRequired)
	.setting(AppSettings::VersionlessSubcommands)			.setting(AppSettings::VersionlessSubcommands)
	.version("0.0.1");			.version("0.0.1");
	let app = add_global_args(app);			let app = add_global_args(app);
	let app = add_subcommand_args(app);			let app = add_subcommand_args(app);
	Ok(repo) => Ok(repo),			Ok(repo) => Ok(repo),
	Err(RepoError::NotFound { at }) if repo_path.is_none() => {			Err(RepoError::NotFound { at }) if repo_path.is_none() => {
	// Not finding a repo is not fatal yet, if `-R` was not given			// Not finding a repo is not fatal yet, if `-R` was not given
	Err(NoRepoInCwdError { cwd: at })			Err(NoRepoInCwdError { cwd: at })
	}			}
	Err(error) => return Err(error.into()),			Err(error) => return Err(error.into()),
	};			};

	run(&CliInvocation {			let invocation = CliInvocation {
	ui,			ui,
	subcommand_args,			subcommand_args,
	non_repo_config,			non_repo_config,
	repo: repo.as_ref(),			repo: repo.as_ref(),
	})			};
				let blackbox = blackbox::Blackbox::new(&invocation, process_start_time)?;
				blackbox.log_command_start();
				let result = run(&invocation);
				blackbox.log_command_end(exit_code(&result));
				result
	}			}

	fn main() {			fn main() {
				// Run this first, before we find out if the blackbox extension is even
				// enabled, in order to include everything in-between in the duration
				// measurements. Reading config files can be slow if they’re on NFS.
				let process_start_time = blackbox::ProcessStartTime::now();

	let ui = ui::Ui::new();			let ui = ui::Ui::new();

	let exit_code = match main_with_result(&ui) {			let result = main_with_result(&ui, &process_start_time);
				if let Err(CommandError::Abort { message }) = &result {
				if !message.is_empty() {
				// Ignore errors when writing to stderr, we’re already exiting
				// with failure code so there’s not much more we can do.
				let _ = ui.write_stderr(&format_bytes!(b"abort: {}\n", message));
				}
				}
				std::process::exit(exit_code(&result))
				}

				fn exit_code(result: &Result<(), CommandError>) -> i32 {
				match result {
	Ok(()) => exitcode::OK,			Ok(()) => exitcode::OK,
				Err(CommandError::Abort { .. }) => exitcode::ABORT,

	// Exit with a specific code and no error message to let a potential			// Exit with a specific code and no error message to let a potential
	// wrapper script fallback to Python-based Mercurial.			// wrapper script fallback to Python-based Mercurial.
	Err(CommandError::Unimplemented) => exitcode::UNIMPLEMENTED,			Err(CommandError::Unimplemented) => exitcode::UNIMPLEMENTED,

	Err(CommandError::Abort { message }) => {
	if !message.is_empty() {
	// Ignore errors when writing to stderr, we’re already exiting
	// with failure code so there’s not much more we can do.
	let _ =
	ui.write_stderr(&format_bytes!(b"abort: {}\n", message));
	}
	exitcode::ABORT
	}			}
	};
	std::process::exit(exit_code)
	}			}

	macro_rules! subcommands {			macro_rules! subcommands {
	($( $command: ident )+) => {			($( $command: ident )+) => {
	mod commands {			mod commands {
	$(			$(
	pub mod $command;			pub mod $command;
	)+			)+

tests/test-rhg.t

	And check that basic rhg commands work with sharing			And check that basic rhg commands work with sharing

	$ cd repo5			$ cd repo5
	$ rhg files			$ rhg files
	a			a
	$ rhg cat -r 0 a			$ rhg cat -r 0 a
	a			a

				The blackbox extension is supported

				$ echo "[extensions]" >> $HGRCPATH
				$ echo "blackbox =" >> $HGRCPATH
				$ echo "[blackbox]" >> $HGRCPATH
				$ echo "maxsize = 1" >> $HGRCPATH
				$ rhg files > /dev/null
				$ cat .hg/blackbox.log
				????/??/?? ??:??:??.??? * @d3873e73d99ef67873dac33fbcc66268d5d2b6f4 (*)> (rust) files exited 0 after 0.??? seconds (glob)
				$ cat .hg/blackbox.log.1
				????/??/?? ??:??:??.??? * @d3873e73d99ef67873dac33fbcc66268d5d2b6f4 (*)> (rust) files (glob)

This is an archive of the discontinued Mercurial Phabricator instance.

rhg: Add support for the blackbox extensionClosedPublic

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