( )⚙ D10012 rhg: Add support for the blackbox extension

This is an archive of the discontinued Mercurial Phabricator instance.

Differential D10012

rhg: Add support for the blackbox extension
ClosedPublic

Authored by SimonSapin on Feb 17 2021, 7:58 AM.

Details

Reviewers
Alphare
Group Reviewers
hg-reviewers
Commits
rHG755c31a1caf9: rhg: Add support for the blackbox extension
rHG4781012afdcf: rhg: Add support for the blackbox extension
Summary

Only command and commandfinish events are logged.
The dirty, logsource, track and ignore configuration items
are not supported yet.

To indicate commands executed without Python, a (rust) prefix is added
in corresponding log messages.

Diff Detail

Repository
rHG Mercurial
Branch
default
Lint
No Linters Available
Unit
No Unit Test Coverage

Event Timeline

SimonSapin created this revision.Feb 17 2021, 7:58 AM
Alphare added a subscriber: Alphare.Feb 18 2021, 5:10 AM
Alphare added inline comments.
rust/rhg/src/blackbox.rs
61

You've got a NBSP here ;)

116

Problem with this is that it conflicts with .t output. Or was it intentional?

SimonSapin marked an inline comment as done.Feb 19 2021, 3:29 AM
SimonSapin added inline comments.
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.

baymax updated this revision to Diff 25680.Feb 19 2021, 6:29 AM

✅ 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.

Revision Contents
Changeset List

Diff 25680

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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)