/**
* The main function of the hook.
*
* Expects the following arguments:
*
* - $argv[1] - The path of the configuration file, xgit-config.php.
* - $argv[2] - The name of the ref being stored.
* - $argv[3] - The old object name stored in the ref.
* - $argv[4] - The new objectname to be stored in the ref.
*
* @param argc
* The number of arguments on the command line.
*
* @param argv
* Array of the arguments.
*/
function xgit_init($argc, $argv)
{
$this_file = array_shift($argv);
// argv[0]
if ($argc != 5) {
xgit_help($this_file, STDERR);
exit(VERSIONCONTROL_GIT_ERROR_WRONG_ARGC);
}
$config_file = array_shift($argv);
// argv[1]
$ref = array_shift($argv);
// argv[2]
$old_obj = array_shift($argv);
// argv[3]
$new_obj = array_shift($argv);
// argv[4]
// Load the configuration file and bootstrap Drupal.
if (!file_exists($config_file)) {
fwrite(STDERR, t('Error: failed to load configuration file.') . "\n");
exit(VERSIONCONTROL_GIT_ERROR_NO_CONFIG);
}
include_once $config_file;
global $xgit;
// Admins and other privileged users don't need to go through any checks.
if (!in_array($xgit['uid'], $xgit['allowed_users'])) {
// Do a full Drupal bootstrap.
xgit_bootstrap();
$ref_type = xgit_ref_type($ref);
if ($ref_type === FALSE) {
fwrite(STDERR, "Given reference '{$ref}' is invalid.\n\n");
exit(VERSIONCONTROL_GIT_ERROR_INVALID_REF);
}
try {
_xgit_assert_type(array($new_obj => array('commit', 'tag', 'empty'), $old_obj => array('commit', 'tag', 'empty')));
} catch (Exception $e) {
fwrite(STDERR, $e->getMessage());
exit(VERSIONCONTROL_GIT_ERROR_INVALID_OBJ);
}
// Debugging help
if ($GLOBALS['xgit_debug']) {
$commits = xgit_get_commits($old_obj, $new_obj);
$commits = implode(' ', $commits);
fwrite(STDERR, 'DEBUG COMMITS:' . $commits . "\n");
}
$label = xgit_label_for($ref, $old_obj, $new_obj);
foreach (xgit_get_commits($old_obj, $new_obj) as $commit) {
$access = xgit_check_commit_access($commit, $label);
// Fail and print out error messages if commit access has been denied.
if (!$access) {
fwrite(STDERR, implode("\n\n", versioncontrol_get_access_errors()) . "\n\n");
exit(VERSIONCONTROL_GIT_ERROR_NO_ACCESS);
}
}
}
// Everything succeeded. Allow operation to complete.
exit(0);
}
/**
* Gets either an array of branches which are "fully contained by" the given
* commit or those branches which are not contained by the given commit. This is
* useful for figuring out which commits are not already contained by a
* different branch, since
*
* git rev-list <commit> --not <unmerged_branches>
*
* will return the commits which are parents of $commit and are not reachable
* from any other branch. This list can then be used to figure out which commits
* are introduced by a newly created branch.
*
* @param $commit
* The commit for which to find the merged branches.
*
* @param $merged
* Whether to get merged or unmerged branches. If TRUE, returns the merged
* branches; FALSE gets the unmerged branches.
*
* @param $include_remote
* Whether or not to include remote tracking branches in the search. Is FALSE
* by default.
*/
function _xgit_get_merged_branches($commit, $merged = TRUE, $include_remote = FALSE)
{
global $xgit;
_xgit_assert_type(array($commit => 'commit'));
if (!isset($xgit['objects'][$commit]['unmerged'])) {
$remote_spec = $include_remote ? '-a' : '';
$merged_spec = $merged ? '--merged' : '--no-merged';
$command = 'git --git-dir="%s" branch %s --no-color %s %s';
$command = sprintf($command, $xgit['git_dir'], $remote_spec, $merged_spec, escapeshellarg($commit));
$result = shell_exec($command);
$branches = preg_split("/\n/", $result, -1, PREG_SPLIT_NO_EMPTY);
// There is a chance that $result may contain a '*' if there is a HEAD and it
// is included in the output.
$branches = preg_replace('/^([\\* ] )?/', '', $branches);
$xgit['objects'][$commit]['unmerged'] = $branches;
}
return $xgit['objects'][$commit]['unmerged'];
}
