fork command, and some core changes to make it work...

- access command allows checking ^C
  - ^C check will fail when the repo exists
This commit is contained in:
Sitaram Chamarty 2012-04-22 09:34:06 +05:30
parent cf3dd885fc
commit c3ec518cef
7 changed files with 144 additions and 2 deletions

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@ -18,6 +18,7 @@ bug to me if they don't.
Here's a list of remote commands that are shipped: Here's a list of remote commands that are shipped:
* 'desc' -- get/set the 'description' file for a repo * 'desc' -- get/set the 'description' file for a repo
* 'fork' -- fork a repo
* 'info' -- already documented [here][info] * 'info' -- already documented [here][info]
* 'mirror' -- documented [here][sync] * 'mirror' -- documented [here][sync]
* 'perms' -- get/set the gl-perms file; see [perms][] for more * 'perms' -- get/set the gl-perms file; see [perms][] for more

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@ -42,7 +42,7 @@ if ( $ARGV[0] eq '-q' ) { $quiet = 1; shift @ARGV; }
my ( $repo, $user, $aa, $ref ) = @ARGV; my ( $repo, $user, $aa, $ref ) = @ARGV;
$aa ||= '+'; $aa ||= '+';
$ref ||= 'any'; $ref ||= 'any';
_die "invalid perm" if not( $aa and $aa =~ /^(R|W|\+|C|D|M)$/ ); _die "invalid perm" if not( $aa and $aa =~ /^(R|W|\+|C|D|M|\^C)$/ );
_die "invalid ref name" if not( $ref and $ref =~ $REPONAME_PATT ); _die "invalid ref name" if not( $ref and $ref =~ $REPONAME_PATT );
my $ret = ''; my $ret = '';

62
src/commands/fork Executable file
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@ -0,0 +1,62 @@
#!/bin/sh
# Usage: ssh git@host fork <repo1> <repo2>
#
# Forks repo1 to repo2. You must have read permissions on repo1, and create
# ("C") permissions for repo2, which of course must not exist.
#
# A fork is functionally the same as cloning repo1 to a client and pushing it
# to a new repo2. It's just a little more efficient, not just in network
# traffic but because it uses git clone's "-l" option to share the object
# store also, so it is likely to be almost instantaneous, regardless of how
# big the repo actually is.
#
# The only caveat is that the repo you cloned *from* must not later become
# unavailable in any way. If you cannot be sure of this, take the scenic
# route (clone repo1, push to repo2).
die() { echo "$@" >&2; exit 1; }
usage() { perl -lne 'print substr($_, 2) if /^# Usage/../^$/' < $0; exit 1; }
[ -z "$1" ] && usage
[ "$1" = "-h" ] && usage
[ -z "$GL_USER" ] && die GL_USER not set
# ----------------------------------------------------------------------
from=$1; shift
to=$1; shift
[ -z "$to" ] && usage
gitolite access -q "$from" $GL_USER R any || die "'$from' does not exist or you are not allowed to read it"
gitolite access -q "$to" $GL_USER ^C any || die "'$to' already exists or you are not allowed to create it"
# ----------------------------------------------------------------------
# IMPORTANT NOTE: checking whether someone can create a repo is done as above.
# However, make sure that the env var GL_USER is set, and that too to the same
# value as arg-2 of the access command), otherwise it won't work.
# Ideally, you'll leave such code to me. There's a reason ^C is not listed in
# the help message for 'gitolite access'.
# ----------------------------------------------------------------------
# clone $from to $to
git clone --bare -l $GL_REPO_BASE/$from.git $GL_REPO_BASE/$to.git
[ $? -ne 0 ] && exit 1
echo "$from forked to $to" >&2
# fix up creator, default role permissions (gl-perms), and hooks
cd $GL_REPO_BASE/$to.git
echo $GL_USER > gl-creator
if gitolite query-rc -q DEFAULT_ROLE_PERMS
then
gitolite query-rc DEFAULT_ROLE_PERMS > gl-perms
fi
ln -sf `gitolite query-rc GL_ADMIN_BASE`/hooks/common/* hooks
# record where you came from
echo "$from" > gl-forked-from
# trigger post_create
gitolite trigger POST_CREATE

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@ -80,6 +80,11 @@ sub access {
$iret =~ s/\^C/$aa/; $iret =~ s/\^C/$aa/;
return $iret if $iret =~ /DENIED/; return $iret if $iret =~ /DENIED/;
} }
# similarly, ^C must be denied if the repo exists
if ( $aa eq '^C' and not repo_missing($repo) ) {
trace( 2, "DENIED by existence" );
return "$aa $ref $repo $user DENIED by existence";
}
my @rules = rules( $repo, $user ); my @rules = rules( $repo, $user );
trace( 2, scalar(@rules) . " rules found" ); trace( 2, scalar(@rules) . " rules found" );
@ -367,7 +372,8 @@ sub generic_name {
# get the creator name. For not-yet-born repos this is $ENV{GL_USER}, # get the creator name. For not-yet-born repos this is $ENV{GL_USER},
# which should be set in all cases that we care about, viz., where we are # which should be set in all cases that we care about, viz., where we are
# checking ^C permissions before new_wild_repo(), and the info command. # checking ^C permissions before new_wild_repo(), and the info command.
# In particular, 'gitolite access' can't be used to check ^C perms. # In particular, 'gitolite access' can't be used to check ^C perms on wild
# repos that contain "CREATOR" if GL_USER is not set.
$creator = creator($base); $creator = creator($base);
$base2 = $base; $base2 = $base;

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@ -288,6 +288,7 @@ __DATA__
{ {
'help' => 1, 'help' => 1,
'desc' => 1, 'desc' => 1,
# 'fork' => 1,
'info' => 1, 'info' => 1,
# 'mirror' => 1, # 'mirror' => 1,
'perms' => 1, 'perms' => 1,

71
t/fork.t Executable file
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@ -0,0 +1,71 @@
#!/usr/bin/perl
use strict;
use warnings;
# this is hardcoded; change it if needed
use lib "src/lib";
use Gitolite::Test;
# fork command
# ----------------------------------------------------------------------
try "plan 30";
my $rb = `gitolite query-rc -n GL_REPO_BASE`;
confreset;confadd '
repo foo/CREATOR/..*
C = u1 u2
RW+ = CREATOR
';
try "ADMIN_PUSH set1; !/FATAL/" or die text();
try "
cd ..
# make the initial repo
glt ls-remote u1 file:///foo/u1/u1a;ok; gsh
/Initialized empty Git repository in .*/foo/u1/u1a.git/
# vrc doesn't have the fork command
glt fork u1 foo/u1/u1a foo/u1/u1a2; !ok; /FATAL: unknown git/gitolite command: fork/
";
# allow fork as a valid command
$ENV{G3T_RC} = "$ENV{HOME}/g3trc";
put "$ENV{G3T_RC}", "\$rc{COMMANDS}{fork} = 1;\n\$rc{DEFAULT_ROLE_PERMS} = 'READERS \@all';\n";
try "
# now the fork succeeds
glt fork u1 foo/u1/u1a foo/u1/u1a2; ok; /Cloning into bare repository '.*/foo/u1/u1a2.git'/
/foo/u1/u1a forked to foo/u1/u1a2/
# now the actual testing starts
# read error
glt fork u1 foo/u1/u1c foo/u1/u1d; !ok; /'foo/u1/u1c' does not exist or you are not allowed to read it/
glt fork u2 foo/u1/u1a foo/u1/u1d; !ok; /'foo/u1/u1a' does not exist or you are not allowed to read it/
# write error
glt fork u1 foo/u1/u1a foo/u2/u1d; !ok; /'foo/u2/u1d' already exists or you are not allowed to create it/
# no error
glt fork u1 foo/u1/u1a foo/u1/u1e; ok; /Cloning into bare repository '.*/foo/u1/u1e.git'/
/warning: You appear to have cloned an empty repository/
/foo/u1/u1a forked to foo/u1/u1e/
# both exist
glt fork u1 foo/u1/u1a foo/u1/u1e; !ok; /'foo/u1/u1e' already exists or you are not allowed to create it/
";
# now check the various files that should have been produced
try "cd $rb; find . -name gl-perms | sort | xargs md5sum"; cmp
'59b3a74b4d33c7631f08e75e7b60c7ce ./foo/u1/u1a2.git/gl-perms
59b3a74b4d33c7631f08e75e7b60c7ce ./foo/u1/u1e.git/gl-perms
';
try "cd $rb; find . -name gl-creator | sort | xargs md5sum"; cmp
'346955ff2eadbf76e19373f07dd370a9 ./foo/u1/u1a2.git/gl-creator
e4774cdda0793f86414e8b9140bb6db4 ./foo/u1/u1a.git/gl-creator
346955ff2eadbf76e19373f07dd370a9 ./foo/u1/u1e.git/gl-creator
';

1
t/glt
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@ -13,6 +13,7 @@ my %extcmds = (
help => 1, help => 1,
info => 1, info => 1,
desc => 1, desc => 1,
fork => 1,
perms => 1, perms => 1,
writable => 1, writable => 1,
); );