diff options
Diffstat (limited to 'third_party/git/t/t7519')
| -rwxr-xr-x | third_party/git/t/t7519/fsmonitor-all | 1 | ||||
| -rwxr-xr-x | third_party/git/t/t7519/fsmonitor-all-v2 | 21 | ||||
| -rwxr-xr-x | third_party/git/t/t7519/fsmonitor-env | 24 | ||||
| -rwxr-xr-x | third_party/git/t/t7519/fsmonitor-watchman | 16 | ||||
| -rwxr-xr-x | third_party/git/t/t7519/fsmonitor-watchman-v2 | 173 |
5 files changed, 223 insertions, 12 deletions
diff --git a/third_party/git/t/t7519/fsmonitor-all b/third_party/git/t/t7519/fsmonitor-all index 691bc94dc2c8..94ab66bd3d86 100755 --- a/third_party/git/t/t7519/fsmonitor-all +++ b/third_party/git/t/t7519/fsmonitor-all @@ -17,7 +17,6 @@ fi if test "$1" != 1 then - echo "Unsupported core.fsmonitor hook version." >&2 exit 1 fi diff --git a/third_party/git/t/t7519/fsmonitor-all-v2 b/third_party/git/t/t7519/fsmonitor-all-v2 new file mode 100755 index 000000000000..061907e88b65 --- /dev/null +++ b/third_party/git/t/t7519/fsmonitor-all-v2 @@ -0,0 +1,21 @@ +#!/usr/bin/perl + +use strict; +use warnings; +# +# An test hook script to integrate with git to test fsmonitor. +# +# The hook is passed a version (currently 2) and since token +# formatted as a string and outputs to stdout all files that have been +# modified since the given time. Paths must be relative to the root of +# the working tree and separated by a single NUL. +# +#echo "$0 $*" >&2 +my ($version, $last_update_token) = @ARGV; + +if ($version ne 2) { + print "Unsupported query-fsmonitor hook version '$version'.\n"; + exit 1; +} + +print "last_update_token\0/\0" diff --git a/third_party/git/t/t7519/fsmonitor-env b/third_party/git/t/t7519/fsmonitor-env new file mode 100755 index 000000000000..8f1f7ab164e1 --- /dev/null +++ b/third_party/git/t/t7519/fsmonitor-env @@ -0,0 +1,24 @@ +#!/bin/sh +# +# An test hook script to integrate with git to test fsmonitor. +# +# The hook is passed a version (currently 1) and a time in nanoseconds +# formatted as a string and outputs to stdout all files that have been +# modified since the given time. Paths must be relative to the root of +# the working tree and separated by a single NUL. +# +#echo "$0 $*" >&2 + +if test "$#" -ne 2 +then + echo "$0: exactly 2 arguments expected" >&2 + exit 2 +fi + +if test "$1" != 1 +then + echo "Unsupported core.fsmonitor hook version." >&2 + exit 1 +fi + +printf '%s\n' $FSMONITOR_LIST diff --git a/third_party/git/t/t7519/fsmonitor-watchman b/third_party/git/t/t7519/fsmonitor-watchman index 5514edcf68be..264b9daf834e 100755 --- a/third_party/git/t/t7519/fsmonitor-watchman +++ b/third_party/git/t/t7519/fsmonitor-watchman @@ -23,10 +23,10 @@ my ($version, $time) = @ARGV; if ($version == 1) { # convert nanoseconds to seconds - $time = int $time / 1000000000; + # subtract one second to make sure watchman will return all changes + $time = int ($time / 1000000000) - 1; } else { - die "Unsupported query-fsmonitor hook version '$version'.\n" . - "Falling back to scanning...\n"; + exit 1; } my $git_work_tree; @@ -54,18 +54,12 @@ sub launch_watchman { # # To accomplish this, we're using the "since" generator to use the # recency index to select candidate nodes and "fields" to limit the - # output to file names only. Then we're using the "expression" term to - # further constrain the results. - # - # The category of transient files that we want to ignore will have a - # creation clock (cclock) newer than $time_t value and will also not - # currently exist. + # output to file names only. my $query = <<" END"; ["query", "$git_work_tree", { "since": $time, - "fields": ["name"], - "expression": ["not", ["allof", ["since", $time, "cclock"], ["not", "exists"]]] + "fields": ["name"] }] END diff --git a/third_party/git/t/t7519/fsmonitor-watchman-v2 b/third_party/git/t/t7519/fsmonitor-watchman-v2 new file mode 100755 index 000000000000..14ed0aa42de0 --- /dev/null +++ b/third_party/git/t/t7519/fsmonitor-watchman-v2 @@ -0,0 +1,173 @@ +#!/usr/bin/perl + +use strict; +use warnings; +use IPC::Open2; + +# An example hook script to integrate Watchman +# (https://facebook.github.io/watchman/) with git to speed up detecting +# new and modified files. +# +# The hook is passed a version (currently 2) and last update token +# formatted as a string and outputs to stdout a new update token and +# all files that have been modified since the update token. Paths must +# be relative to the root of the working tree and separated by a single NUL. +# +# To enable this hook, rename this file to "query-watchman" and set +# 'git config core.fsmonitor .git/hooks/query-watchman' +# +my ($version, $last_update_token) = @ARGV; + +# Uncomment for debugging +# print STDERR "$0 $version $last_update_token\n"; + +# Check the hook interface version +if ($version ne 2) { + die "Unsupported query-fsmonitor hook version '$version'.\n" . + "Falling back to scanning...\n"; +} + +my $git_work_tree = get_working_dir(); + +my $retry = 1; + +my $json_pkg; +eval { + require JSON::XS; + $json_pkg = "JSON::XS"; + 1; +} or do { + require JSON::PP; + $json_pkg = "JSON::PP"; +}; + +launch_watchman(); + +sub launch_watchman { + my $o = watchman_query(); + if (is_work_tree_watched($o)) { + output_result($o->{clock}, @{$o->{files}}); + } +} + +sub output_result { + my ($clockid, @files) = @_; + + # Uncomment for debugging watchman output + # open (my $fh, ">", ".git/watchman-output.out"); + # binmode $fh, ":utf8"; + # print $fh "$clockid\n@files\n"; + # close $fh; + + binmode STDOUT, ":utf8"; + print $clockid; + print "\0"; + local $, = "\0"; + print @files; +} + +sub watchman_clock { + my $response = qx/watchman clock "$git_work_tree"/; + die "Failed to get clock id on '$git_work_tree'.\n" . + "Falling back to scanning...\n" if $? != 0; + + return $json_pkg->new->utf8->decode($response); +} + +sub watchman_query { + my $pid = open2(\*CHLD_OUT, \*CHLD_IN, 'watchman -j --no-pretty') + or die "open2() failed: $!\n" . + "Falling back to scanning...\n"; + + # In the query expression below we're asking for names of files that + # changed since $last_update_token but not from the .git folder. + # + # To accomplish this, we're using the "since" generator to use the + # recency index to select candidate nodes and "fields" to limit the + # output to file names only. Then we're using the "expression" term to + # further constrain the results. + if (substr($last_update_token, 0, 1) eq "c") { + $last_update_token = "\"$last_update_token\""; + } + my $query = <<" END"; + ["query", "$git_work_tree", { + "since": $last_update_token, + "fields": ["name"], + "expression": ["not", ["dirname", ".git"]] + }] + END + + # Uncomment for debugging the watchman query + # open (my $fh, ">", ".git/watchman-query.json"); + # print $fh $query; + # close $fh; + + print CHLD_IN $query; + close CHLD_IN; + my $response = do {local $/; <CHLD_OUT>}; + + # Uncomment for debugging the watch response + # open ($fh, ">", ".git/watchman-response.json"); + # print $fh $response; + # close $fh; + + die "Watchman: command returned no output.\n" . + "Falling back to scanning...\n" if $response eq ""; + die "Watchman: command returned invalid output: $response\n" . + "Falling back to scanning...\n" unless $response =~ /^\{/; + + return $json_pkg->new->utf8->decode($response); +} + +sub is_work_tree_watched { + my ($output) = @_; + my $error = $output->{error}; + if ($retry > 0 and $error and $error =~ m/unable to resolve root .* directory (.*) is not watched/) { + $retry--; + my $response = qx/watchman watch "$git_work_tree"/; + die "Failed to make watchman watch '$git_work_tree'.\n" . + "Falling back to scanning...\n" if $? != 0; + $output = $json_pkg->new->utf8->decode($response); + $error = $output->{error}; + die "Watchman: $error.\n" . + "Falling back to scanning...\n" if $error; + + # Uncomment for debugging watchman output + # open (my $fh, ">", ".git/watchman-output.out"); + # close $fh; + + # Watchman will always return all files on the first query so + # return the fast "everything is dirty" flag to git and do the + # Watchman query just to get it over with now so we won't pay + # the cost in git to look up each individual file. + my $o = watchman_clock(); + $error = $output->{error}; + + die "Watchman: $error.\n" . + "Falling back to scanning...\n" if $error; + + output_result($o->{clock}, ("/")); + $last_update_token = $o->{clock}; + + eval { launch_watchman() }; + return 0; + } + + die "Watchman: $error.\n" . + "Falling back to scanning...\n" if $error; + + return 1; +} + +sub get_working_dir { + my $working_dir; + if ($^O =~ 'msys' || $^O =~ 'cygwin') { + $working_dir = Win32::GetCwd(); + $working_dir =~ tr/\\/\//; + } else { + require Cwd; + $working_dir = Cwd::cwd(); + } + + return $working_dir; +} |