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gl-reflog -- first version; proof of concept only, NOT for production use (yet)

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Sitaram Chamarty 2010-10-05 20:33:32 +05:30
parent dc62d69848
commit 51ef951768
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contrib/adc/gl-reflog Executable file
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#!/usr/bin/perl -w
use strict;
use warnings;
# - show fake "reflog" from gitolite server
# - recover deleted branches
# - recover from bad force pushes
# --------------------
# - PROOF OF CONCEPT ONLY
# - NO ARGUMENT OR ERROR CHECKING DONE; DO NOT USE IN PRODUCTION UNTIL THAT IS FIXED
# --------------------
# WARNING
# - heavily dependent on the gitolite log file format (duh!)
# USAGE
# ssh git@server gl-reflog show r1 refs/heads/b1
# # shows last 10 updates to branch b1 in repo r1
# ssh git@server gl-reflog show r1 refs/heads/b1 20
# # shows last 20 entries...
# ssh git@server gl-reflog recover r1 refs/heads/b1
# # recovers the last update to b1 in r1 if it was a "+"
# NOTES
# - the verb "recover" is used because this is expected to be used most often
# to recover deleted branches. Plus there's enough confusion in git land
# caused by "reset" and "revert" I thought I should add my bit to it ;-)
# - git's internal reflog is NOT recovered, even if you recover the branch.
# I'm good but not *that* good ;-)
# - since this program produces a log entry that satisfies it's own criteria,
# it acts as a "toggle" for its own action for rewinds (but not for deletes)
my($cmd, $repo, $ref, $limit) = @ARGV;
$limit ||= 10;
my @logfiles = sort glob("$ENV{GL_ADMINDIR}/logs/*");
# TODO figure out how to avoid reading *all* the log files when you really
# only need the last few
our @loglines;
{
my @f;
local(@ARGV) = @logfiles;
while (<>) {
chomp;
@f = split /\t/;
# field 2 is the userid, 5 is W or +, 6/7 are old/new SHAs
# 8 is reponame, 9 is refname (but all those are 1-based)
next unless $f[1] eq $ENV{GL_USER};
next unless $f[3] =~ /^(git-receive-pack|gl-reflog recover) /;
next unless $f[8];
next unless $f[7] eq $repo;
next unless $f[8] eq $ref;
push @loglines, $_;
}
}
if ( $cmd eq 'show' ) {
my $start = @loglines - $limit;
$start = 0 if $start < 0;
map { print "$loglines[$_]\n" } $start .. $#loglines;
exit 0;
}
if ( $cmd eq 'recover' ) {
my @f = split /\t/, $loglines[$#loglines];
die "sorry, the last commit was not a rewind or delete\n"
unless $f[4] eq '+';
my($oldsha, $newsha) = @f[5,6];
if ($newsha =~ /^0+$/) {
print "recovering $repo $ref at $oldsha (was deleted)\n";
} else {
print "recovering $repo $ref at $oldsha (was forced to $newsha)\n";
}
chdir("$ENV{GL_REPO_BASE_ABS}/$repo.git");
require "$ENV{GL_BINDIR}/gitolite.pm" or die "parse gitolite.pm failed\n";
my $newsha2 = $newsha;
$newsha2 = '' if $newsha =~ /^0+$/;
system("git", "update-ref", $ref, $oldsha, $newsha2) and
die "repo $repo, update-ref $ref $oldsha $newsha failed...\n";
&log_it("", "+\t$newsha\t$oldsha\t$repo\t$ref");
}