Pratyush Mallick / Mbed OS nano_dac

this is testing

noos_mbed/.git/hooks/fsmonitor-watchman.sample@0:e8a1ba50c46b, 2021-01-14 (annotated)

Committer:
pmallick
Date:
Thu Jan 14 19:12:57 2021 +0530
Revision:
0:e8a1ba50c46b
this is testing

Who changed what in which revision?

UserRevisionLine numberNew contents of line
pmallick 0:e8a1ba50c46b 1 #!/usr/bin/perl
pmallick 0:e8a1ba50c46b 2
pmallick 0:e8a1ba50c46b 3 use strict;
pmallick 0:e8a1ba50c46b 4 use warnings;
pmallick 0:e8a1ba50c46b 5 use IPC::Open2;
pmallick 0:e8a1ba50c46b 6
pmallick 0:e8a1ba50c46b 7 # An example hook script to integrate Watchman
pmallick 0:e8a1ba50c46b 8 # (https://facebook.github.io/watchman/) with git to speed up detecting
pmallick 0:e8a1ba50c46b 9 # new and modified files.
pmallick 0:e8a1ba50c46b 10 #
pmallick 0:e8a1ba50c46b 11 # The hook is passed a version (currently 2) and last update token
pmallick 0:e8a1ba50c46b 12 # formatted as a string and outputs to stdout a new update token and
pmallick 0:e8a1ba50c46b 13 # all files that have been modified since the update token. Paths must
pmallick 0:e8a1ba50c46b 14 # be relative to the root of the working tree and separated by a single NUL.
pmallick 0:e8a1ba50c46b 15 #
pmallick 0:e8a1ba50c46b 16 # To enable this hook, rename this file to "query-watchman" and set
pmallick 0:e8a1ba50c46b 17 # 'git config core.fsmonitor .git/hooks/query-watchman'
pmallick 0:e8a1ba50c46b 18 #
pmallick 0:e8a1ba50c46b 19 my ($version, $last_update_token) = @ARGV;
pmallick 0:e8a1ba50c46b 20
pmallick 0:e8a1ba50c46b 21 # Uncomment for debugging
pmallick 0:e8a1ba50c46b 22 # print STDERR "$0 $version $last_update_token\n";
pmallick 0:e8a1ba50c46b 23
pmallick 0:e8a1ba50c46b 24 # Check the hook interface version
pmallick 0:e8a1ba50c46b 25 if ($version ne 2) {
pmallick 0:e8a1ba50c46b 26 die "Unsupported query-fsmonitor hook version '$version'.\n" .
pmallick 0:e8a1ba50c46b 27 "Falling back to scanning...\n";
pmallick 0:e8a1ba50c46b 28 }
pmallick 0:e8a1ba50c46b 29
pmallick 0:e8a1ba50c46b 30 my $git_work_tree = get_working_dir();
pmallick 0:e8a1ba50c46b 31
pmallick 0:e8a1ba50c46b 32 my $retry = 1;
pmallick 0:e8a1ba50c46b 33
pmallick 0:e8a1ba50c46b 34 my $json_pkg;
pmallick 0:e8a1ba50c46b 35 eval {
pmallick 0:e8a1ba50c46b 36 require JSON::XS;
pmallick 0:e8a1ba50c46b 37 $json_pkg = "JSON::XS";
pmallick 0:e8a1ba50c46b 38 1;
pmallick 0:e8a1ba50c46b 39 } or do {
pmallick 0:e8a1ba50c46b 40 require JSON::PP;
pmallick 0:e8a1ba50c46b 41 $json_pkg = "JSON::PP";
pmallick 0:e8a1ba50c46b 42 };
pmallick 0:e8a1ba50c46b 43
pmallick 0:e8a1ba50c46b 44 launch_watchman();
pmallick 0:e8a1ba50c46b 45
pmallick 0:e8a1ba50c46b 46 sub launch_watchman {
pmallick 0:e8a1ba50c46b 47 my $o = watchman_query();
pmallick 0:e8a1ba50c46b 48 if (is_work_tree_watched($o)) {
pmallick 0:e8a1ba50c46b 49 output_result($o->{clock}, @{$o->{files}});
pmallick 0:e8a1ba50c46b 50 }
pmallick 0:e8a1ba50c46b 51 }
pmallick 0:e8a1ba50c46b 52
pmallick 0:e8a1ba50c46b 53 sub output_result {
pmallick 0:e8a1ba50c46b 54 my ($clockid, @files) = @_;
pmallick 0:e8a1ba50c46b 55
pmallick 0:e8a1ba50c46b 56 # Uncomment for debugging watchman output
pmallick 0:e8a1ba50c46b 57 # open (my $fh, ">", ".git/watchman-output.out");
pmallick 0:e8a1ba50c46b 58 # binmode $fh, ":utf8";
pmallick 0:e8a1ba50c46b 59 # print $fh "$clockid\n@files\n";
pmallick 0:e8a1ba50c46b 60 # close $fh;
pmallick 0:e8a1ba50c46b 61
pmallick 0:e8a1ba50c46b 62 binmode STDOUT, ":utf8";
pmallick 0:e8a1ba50c46b 63 print $clockid;
pmallick 0:e8a1ba50c46b 64 print "\0";
pmallick 0:e8a1ba50c46b 65 local $, = "\0";
pmallick 0:e8a1ba50c46b 66 print @files;
pmallick 0:e8a1ba50c46b 67 }
pmallick 0:e8a1ba50c46b 68
pmallick 0:e8a1ba50c46b 69 sub watchman_clock {
pmallick 0:e8a1ba50c46b 70 my $response = qx/watchman clock "$git_work_tree"/;
pmallick 0:e8a1ba50c46b 71 die "Failed to get clock id on '$git_work_tree'.\n" .
pmallick 0:e8a1ba50c46b 72 "Falling back to scanning...\n" if $? != 0;
pmallick 0:e8a1ba50c46b 73
pmallick 0:e8a1ba50c46b 74 return $json_pkg->new->utf8->decode($response);
pmallick 0:e8a1ba50c46b 75 }
pmallick 0:e8a1ba50c46b 76
pmallick 0:e8a1ba50c46b 77 sub watchman_query {
pmallick 0:e8a1ba50c46b 78 my $pid = open2(\*CHLD_OUT, \*CHLD_IN, 'watchman -j --no-pretty')
pmallick 0:e8a1ba50c46b 79 or die "open2() failed: $!\n" .
pmallick 0:e8a1ba50c46b 80 "Falling back to scanning...\n";
pmallick 0:e8a1ba50c46b 81
pmallick 0:e8a1ba50c46b 82 # In the query expression below we're asking for names of files that
pmallick 0:e8a1ba50c46b 83 # changed since $last_update_token but not from the .git folder.
pmallick 0:e8a1ba50c46b 84 #
pmallick 0:e8a1ba50c46b 85 # To accomplish this, we're using the "since" generator to use the
pmallick 0:e8a1ba50c46b 86 # recency index to select candidate nodes and "fields" to limit the
pmallick 0:e8a1ba50c46b 87 # output to file names only. Then we're using the "expression" term to
pmallick 0:e8a1ba50c46b 88 # further constrain the results.
pmallick 0:e8a1ba50c46b 89 if (substr($last_update_token, 0, 1) eq "c") {
pmallick 0:e8a1ba50c46b 90 $last_update_token = "\"$last_update_token\"";
pmallick 0:e8a1ba50c46b 91 }
pmallick 0:e8a1ba50c46b 92 my $query = <<" END";
pmallick 0:e8a1ba50c46b 93 ["query", "$git_work_tree", {
pmallick 0:e8a1ba50c46b 94 "since": $last_update_token,
pmallick 0:e8a1ba50c46b 95 "fields": ["name"],
pmallick 0:e8a1ba50c46b 96 "expression": ["not", ["dirname", ".git"]]
pmallick 0:e8a1ba50c46b 97 }]
pmallick 0:e8a1ba50c46b 98 END
pmallick 0:e8a1ba50c46b 99
pmallick 0:e8a1ba50c46b 100 # Uncomment for debugging the watchman query
pmallick 0:e8a1ba50c46b 101 # open (my $fh, ">", ".git/watchman-query.json");
pmallick 0:e8a1ba50c46b 102 # print $fh $query;
pmallick 0:e8a1ba50c46b 103 # close $fh;
pmallick 0:e8a1ba50c46b 104
pmallick 0:e8a1ba50c46b 105 print CHLD_IN $query;
pmallick 0:e8a1ba50c46b 106 close CHLD_IN;
pmallick 0:e8a1ba50c46b 107 my $response = do {local $/; <CHLD_OUT>};
pmallick 0:e8a1ba50c46b 108
pmallick 0:e8a1ba50c46b 109 # Uncomment for debugging the watch response
pmallick 0:e8a1ba50c46b 110 # open ($fh, ">", ".git/watchman-response.json");
pmallick 0:e8a1ba50c46b 111 # print $fh $response;
pmallick 0:e8a1ba50c46b 112 # close $fh;
pmallick 0:e8a1ba50c46b 113
pmallick 0:e8a1ba50c46b 114 die "Watchman: command returned no output.\n" .
pmallick 0:e8a1ba50c46b 115 "Falling back to scanning...\n" if $response eq "";
pmallick 0:e8a1ba50c46b 116 die "Watchman: command returned invalid output: $response\n" .
pmallick 0:e8a1ba50c46b 117 "Falling back to scanning...\n" unless $response =~ /^\{/;
pmallick 0:e8a1ba50c46b 118
pmallick 0:e8a1ba50c46b 119 return $json_pkg->new->utf8->decode($response);
pmallick 0:e8a1ba50c46b 120 }
pmallick 0:e8a1ba50c46b 121
pmallick 0:e8a1ba50c46b 122 sub is_work_tree_watched {
pmallick 0:e8a1ba50c46b 123 my ($output) = @_;
pmallick 0:e8a1ba50c46b 124 my $error = $output->{error};
pmallick 0:e8a1ba50c46b 125 if ($retry > 0 and $error and $error =~ m/unable to resolve root .* directory (.*) is not watched/) {
pmallick 0:e8a1ba50c46b 126 $retry--;
pmallick 0:e8a1ba50c46b 127 my $response = qx/watchman watch "$git_work_tree"/;
pmallick 0:e8a1ba50c46b 128 die "Failed to make watchman watch '$git_work_tree'.\n" .
pmallick 0:e8a1ba50c46b 129 "Falling back to scanning...\n" if $? != 0;
pmallick 0:e8a1ba50c46b 130 $output = $json_pkg->new->utf8->decode($response);
pmallick 0:e8a1ba50c46b 131 $error = $output->{error};
pmallick 0:e8a1ba50c46b 132 die "Watchman: $error.\n" .
pmallick 0:e8a1ba50c46b 133 "Falling back to scanning...\n" if $error;
pmallick 0:e8a1ba50c46b 134
pmallick 0:e8a1ba50c46b 135 # Uncomment for debugging watchman output
pmallick 0:e8a1ba50c46b 136 # open (my $fh, ">", ".git/watchman-output.out");
pmallick 0:e8a1ba50c46b 137 # close $fh;
pmallick 0:e8a1ba50c46b 138
pmallick 0:e8a1ba50c46b 139 # Watchman will always return all files on the first query so
pmallick 0:e8a1ba50c46b 140 # return the fast "everything is dirty" flag to git and do the
pmallick 0:e8a1ba50c46b 141 # Watchman query just to get it over with now so we won't pay
pmallick 0:e8a1ba50c46b 142 # the cost in git to look up each individual file.
pmallick 0:e8a1ba50c46b 143 my $o = watchman_clock();
pmallick 0:e8a1ba50c46b 144 $error = $output->{error};
pmallick 0:e8a1ba50c46b 145
pmallick 0:e8a1ba50c46b 146 die "Watchman: $error.\n" .
pmallick 0:e8a1ba50c46b 147 "Falling back to scanning...\n" if $error;
pmallick 0:e8a1ba50c46b 148
pmallick 0:e8a1ba50c46b 149 output_result($o->{clock}, ("/"));
pmallick 0:e8a1ba50c46b 150 $last_update_token = $o->{clock};
pmallick 0:e8a1ba50c46b 151
pmallick 0:e8a1ba50c46b 152 eval { launch_watchman() };
pmallick 0:e8a1ba50c46b 153 return 0;
pmallick 0:e8a1ba50c46b 154 }
pmallick 0:e8a1ba50c46b 155
pmallick 0:e8a1ba50c46b 156 die "Watchman: $error.\n" .
pmallick 0:e8a1ba50c46b 157 "Falling back to scanning...\n" if $error;
pmallick 0:e8a1ba50c46b 158
pmallick 0:e8a1ba50c46b 159 return 1;
pmallick 0:e8a1ba50c46b 160 }
pmallick 0:e8a1ba50c46b 161
pmallick 0:e8a1ba50c46b 162 sub get_working_dir {
pmallick 0:e8a1ba50c46b 163 my $working_dir;
pmallick 0:e8a1ba50c46b 164 if ($^O =~ 'msys' || $^O =~ 'cygwin') {
pmallick 0:e8a1ba50c46b 165 $working_dir = Win32::GetCwd();
pmallick 0:e8a1ba50c46b 166 $working_dir =~ tr/\\/\//;
pmallick 0:e8a1ba50c46b 167 } else {
pmallick 0:e8a1ba50c46b 168 require Cwd;
pmallick 0:e8a1ba50c46b 169 $working_dir = Cwd::cwd();
pmallick 0:e8a1ba50c46b 170 }
pmallick 0:e8a1ba50c46b 171
pmallick 0:e8a1ba50c46b 172 return $working_dir;
pmallick 0:e8a1ba50c46b 173 }