ctucx.git: nimgit

commit.nim: add getCommitter and getParrent

diff --git a/nimgit/commit.nim b/nimgit/commit.nim
@@ -24,3 +24,16 @@ proc getAuthor* (commit: GitCommit): GitSignature =
     result.name  = $author.name
     result.email = $author.email
     result.when  = parseGitTime(author.when)
+
+proc getCommitter* (commit: GitCommit): GitSignature =
+    let author = git_commit_committer(commit)
+
+    result.name  = $author.name
+    result.email = $author.email
+    result.when  = parseGitTime(author.when)
+
+proc getParrent* (commit: GitCommit): GitCommit =
+    let error = git_commit_parent(addr result, commit, 0)
+
+    if error != 0:
+        raise newException(CatchableError, "parrent lookup failed: " & $error.getResultCode)