/**
* Get a commit
*
* @param string $hash commit hash
* @return GitPHP_Commit|null commit objet
*/
public function GetCommit($hash)
{
if (empty($hash)) {
return null;
}
if (preg_match('/^[0-9A-Fa-f]{4,39}$/', $hash)) {
$fullHash = $this->project->ExpandHash($hash);
if ($fullHash == $hash) {
throw new GitPHP_InvalidHashException($hash);
}
$hash = $fullHash;
}
if (!preg_match('/^[0-9A-Fa-f]{40}$/', $hash)) {
return null;
}
$key = GitPHP_Commit::CacheKey($this->project->GetProject(), $hash);
$commit = null;
if ($this->memoryCache) {
$commit = $this->memoryCache->Get($key);
}
if (!$commit) {
if ($this->cache) {
$commit = $this->cache->Get($key);
}
$strategy = null;
if ($this->compat) {
$strategy = new GitPHP_CommitLoad_Git($this->exe);
} else {
$strategy = new GitPHP_CommitLoad_Raw($this->objectLoader, $this->exe);
}
if ($commit) {
$commit->SetProject($this->project);
$commit->SetStrategy($strategy);
} else {
$commit = new GitPHP_Commit($this->project, $hash, $strategy);
}
$commit->AddObserver($this);
if ($this->memoryCache) {
$this->memoryCache->Set($key, $commit);
}
}
return $commit;
}
/**
* Gets the cache key to use for this object
*
* @return string cache key
*/
public function GetCacheKey()
{
return GitPHP_Commit::CacheKey($this->project->GetProject(), $this->hash);
}