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#!/usr/bin/perl
use strict;
use warnings;
use POSIX qw(strftime);
use base qw/Exporter/;
our @EXPORT_OK=qw(iso_time_with_dot gen_dot_patch);
sub iso_time_with_dot {
strftime "%Y-%m-%d.%H:%M:%S",gmtime(shift||time)
}
# generate the contents of a .patch file for an arbitrary commitish, or for HEAD if none is supplied
# assumes the CWD is inside of a perl git repository. If the repository is bare then refs/heads/*
# is used to determine the branch. If the repository is not bare then refs/remotes/origin/* is used
# to determine the branch. (The assumption being that if its bare then this is running inside of
# the master git repo - if its not bare then it is a checkout which may not have all the branches)
sub gen_dot_patch {
my $target= shift || 'HEAD';
chomp(my ($git_dir, $is_bare, $sha1)=`git rev-parse --git-dir --is-bare-repository $target`);
die "Not in a git repository!" if !$git_dir;
$is_bare= "" if $is_bare and $is_bare eq 'false';
# which branches to scan - the order here is important, the first hit we find we use
# so if two branches can both reach a ref we want the right one first.
my @branches=(
'blead',
'maint-5.10',
'maint-5.8',
'maint-5.8-dor',
'maint-5.6',
'maint-5.005',
'maint-5.004',
# and more generalized searches...
'refs/heads/*',
'refs/remotes/*',
'refs/*',
);
my $reftype= $is_bare ? "heads" : "remotes/origin";
my $branch;
foreach my $name (@branches) {
my $refs= $name=~m!^refs/! ? $name : "refs/$reftype/$name";
my $cmd= "git name-rev --name-only --refs=$refs $sha1";
chomp($branch= `$cmd`);
last if $branch ne 'undefined';
}
for ($branch) {
$_ ||= "error"; # hmm, we did not get /anything/ from name-rev?
s!^\Q$reftype\E/!! || # strip off the reftype
s!^refs/heads/!! || # possible other places it was found
s!^refs/remotes/!! || # ...
s!^refs/!!; # might even be a tag or something weirdo...
s![~^].*\z!!; # strip off how far we are from the item
}
my $tstamp= iso_time_with_dot(`git log -1 --pretty="format:%ct" $sha1`);
chomp(my $describe= `git describe $sha1`);
join(" ", $branch, $tstamp, $sha1, $describe);
}
1;
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