120 lines
4.5 KiB
Perl
Executable file
120 lines
4.5 KiB
Perl
Executable file
#!/usr/bin/perl
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use strict;
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use warnings;
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# === update ===
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# this is gitolite's update hook
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# part of the gitolite (GL) suite
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# how run: via git, being copied as .git/hooks/update in every repo
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# when: every push
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# input:
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# - see man githooks for STDIN
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# - uses the compiled config file to get permissions info
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# output: based on permissions etc., exit 0 or 1
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# security:
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# - none
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# robustness:
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# other notes:
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# ----------------------------------------------------------------------------
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# common definitions
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# ----------------------------------------------------------------------------
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our ($GL_CONF_COMPILED);
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our %repos;
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# we should already have the GL_RC env var set when we enter this hook
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die "parse $ENV{GL_RC} failed: " . ($! or $@) unless do $ENV{GL_RC};
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# then "do" the compiled config file, whose name we now know. Before doing
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# that we setup the creater etc from environment variables so that the parse
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# interpolates them. We've minimised the duplication but this *does*
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# duplicate a bit of parse_acl from gitolite.pm; we don't want to include that
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# file here just for that little bit
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{
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our $creater = $ENV{GL_CREATER};
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our $readers = $ENV{GL_READERS};
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our $writers = $ENV{GL_WRITERS};
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our $gl_user = $ENV{GL_USER};
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die "parse $GL_CONF_COMPILED failed: " . ($! or $@) unless do $GL_CONF_COMPILED;
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$repos{$ENV{GL_REPO}} = $repos{$ENV{GL_REPOPATT}} if ( $ENV{GL_REPOPATT} );
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}
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my $reported_repo = $ENV{GL_REPO} . ( $ENV{GL_REPOPATT} ? " ($ENV{GL_REPOPATT})" : "" );
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# we've started to need some common subs in what used to be a small, cute,
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# little script that barely spanned a few lines :(
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require "$ENV{GL_BINDIR}/gitolite.pm";
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# ----------------------------------------------------------------------------
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# start...
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# ----------------------------------------------------------------------------
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my @saved_ARGV = @ARGV; # for chaining to another update hook at the end
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my $ref = shift;
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my $oldsha = shift;
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my $newsha = shift;
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my $merge_base = '0' x 40;
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# compute a merge-base if both SHAs are non-0, else leave it as '0'x40
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# (i.e., for branch create or delete, merge_base == '0'x40)
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chomp($merge_base = `git merge-base $oldsha $newsha`)
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unless $oldsha eq '0' x 40
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or $newsha eq '0' x 40;
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# what are you trying to do? (is it 'W' or '+'?)
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my $perm = 'W';
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# rewriting a tag is considered a rewind, in terms of permissions
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$perm = '+' if $ref =~ m(refs/tags/) and $oldsha ne ('0' x 40);
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# non-ff push to ref
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# notice that ref delete looks like a rewind, as it should
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$perm = '+' if $oldsha ne $merge_base;
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my @allowed_refs;
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# we want specific perms to override @all, so they come first
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push @allowed_refs, @ { $repos{$ENV{GL_REPO}}{$ENV{GL_USER}} || [] };
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push @allowed_refs, @ { $repos{$ENV{GL_REPO}}{'@all'} || [] };
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# prepare the list of refs to be checked
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# previously, we just checked $ref -- the ref being updated, which is passed
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# to us by git (see man githooks). Now we also have to treat each NAME being
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# updated as a potential "ref" and check that, if NAME-based restrictions have
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# been specified
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my @refs = ($ref); # the first ref to check is the real one
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if (exists $repos{$ENV{GL_REPO}}{NAME_LIMITS}) {
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# this is special to git -- the hash of an empty tree
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my $empty='4b825dc642cb6eb9a060e54bf8d69288fbee4904';
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# well they're not really "trees" but $empty is indeed the empty tree so
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# we can just pretend $oldsha/$newsha are also trees, and anyway 'git
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# diff' only wants trees
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my $oldtree = $oldsha eq '0' x 40 ? $empty : $oldsha;
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my $newtree = $newsha eq '0' x 40 ? $empty : $newsha;
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push @refs, map { chomp; s/^/NAME\//; $_; } `git diff --name-only $oldtree $newtree`;
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}
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# and in this version, we have many "refs" to check. The one we print in the
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# log is the *first* one (which is a *real* ref, like refs/heads/master),
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# while all the rest (if they exist) are like NAME/something. So we do the
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# first one separately to capture it, then run the rest (if any)
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my $log_refex = check_ref(\@allowed_refs, $ENV{GL_REPO}, (shift @refs), $perm);
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&check_ref (\@allowed_refs, $ENV{GL_REPO}, $_ , $perm) for @refs;
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# if we returned at all, all the checks succeeded, so we log the action and exit 0
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&log_it("$ENV{GL_TS} $perm\t" .
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substr($oldsha, 0, 14) . "\t" . substr($newsha, 0, 14) .
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"\t$reported_repo\t$ref\t$ENV{GL_USER}\t$log_refex\n");
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# now chain to the local admin defined update hook, if present
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exec "./hooks/update.secondary", @saved_ARGV
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if -f "hooks/update.secondary" or -l "hooks/update.secondary";
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exit 0;
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