1 files changed, 71 insertions, 0 deletions
diff --git a/src/commands/git-annex-shell b/src/commands/git-annex-shell
new file mode 100755
index 0000000..572aba6
--- /dev/null
+++ b/src/commands/git-annex-shell
@@ -0,0 +1,71 @@
+#!/usr/bin/perl
+
+use lib $ENV{GL_LIBDIR};
+use Gitolite::Easy;
+
+# This command requires unrestricted arguments, so add it to the ENABLE list
+# like this:
+#   'git-annex-shell ua',
+
+# This requires git-annex version 20111016 or newer. Older versions won't
+# be secure.
+
+use strict;
+use warnings;
+
+# ignore @ARGV and look at the original unmodified command
+my $cmd = $ENV{SSH_ORIGINAL_COMMAND};
+
+# Expect commands like:
+#   git-annex-shell 'configlist' '/~/repo'
+#   git-annex-shell 'configlist' '/repo'
+#   git-annex-shell 'sendkey' '/~/repo' 'key'
+# The parameters are always single quoted, and the repo path is always
+# the second parameter.
+# Further parameters are not validated here (see below).
+die "bad git-annex-shell command: $cmd"
+  unless $cmd =~ m#^(git-annex-shell '\w+' ')/(?:\~/)?([0-9a-zA-Z][0-9a-zA-Z._\@/+-]*)('( .*|))$#;
+my $start = $1;
+my $repo  = $2;
+my $end   = $3;
+$repo =~ s/\.git$//;
+die "I dont like some of the characters in $repo\n" unless $repo =~ $Gitolite::Rc::REPONAME_PATT;
+die "I dont like absolute paths in $cmd\n" if $repo =~ /^\//;
+die "I dont like '..' paths in $cmd\n"     if $repo =~ /\.\./;
+
+# Modify $cmd, fixing up the path to the repo to include GL_REPO_BASE.
+my $newcmd = "$start$rc{GL_REPO_BASE}/$repo$end";
+
+# Rather than keeping track of which git-annex-shell commands
+# require write access and which are readonly, we tell it
+# when readonly access is needed.
+if ( can_write($repo) ) {
+} elsif ( can_read($repo) ) {
+    $ENV{GIT_ANNEX_SHELL_READONLY} = 1;
+} else {
+    die "$repo $ENV{GL_USER} DENIED\n";
+}
+# Further limit git-annex-shell to safe commands (avoid it passing
+# unknown commands on to git-shell)
+$ENV{GIT_ANNEX_SHELL_LIMITED} = 1;
+
+# Note that $newcmd does *not* get evaluated by the unix shell.
+# Instead it is passed as a single parameter to git-annex-shell for
+# it to parse and handle the command. This is why we do not need to
+# fully validate $cmd above.
+Gitolite::Common::gl_log( $ENV{SSH_ORIGINAL_COMMAND} );
+exec "git-annex-shell", "-c", $newcmd;
+
+__END__
+
+INSTRUCTIONS... (NEED TO BE VALIDATED BY SOMEONE WHO KNOWS GIT-ANNEX WELL).
+
+based on http://git-annex.branchable.com/tips/using_gitolite_with_git-annex/
+ONLY VARIATIONS FROM THAT PAGE ARE WRITTEN HERE.
+
+setup
+
+  * in the ENABLE list in the rc file, add an entry like this:
+        'git-annex-shell ua',
+
+That should be it; everything else should be as in that page.