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-rwxr-xr-xopenvpn3/openvpn3-linux/hooks/fsmonitor-watchman.sample174
1 files changed, 0 insertions, 174 deletions
diff --git a/openvpn3/openvpn3-linux/hooks/fsmonitor-watchman.sample b/openvpn3/openvpn3-linux/hooks/fsmonitor-watchman.sample
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index 23e856f5d..000000000
--- a/openvpn3/openvpn3-linux/hooks/fsmonitor-watchman.sample
+++ /dev/null
@@ -1,174 +0,0 @@
-#!/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.
- my $last_update_line = "";
- if (substr($last_update_token, 0, 1) eq "c") {
- $last_update_token = "\"$last_update_token\"";
- $last_update_line = qq[\n"since": $last_update_token,];
- }
- my $query = <<" END";
- ["query", "$git_work_tree", {$last_update_line
- "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;
-}