Add -OID and -parentOIDs to GTCommit

Author: tiennou

ObjectiveGit/GTCommit.h

@@ -39,9 +39,11 @@ NS_ASSUME_NONNULL_BEGIN
 
 @interface GTCommit : GTObject {}
 
+@property (nonatomic, readonly, strong) GTOID *OID;
 @property (nonatomic, readonly, strong) GTSignature * _Nullable author;
 @property (nonatomic, readonly, strong) GTSignature * _Nullable committer;
 @property (nonatomic, readonly, copy) NSArray<GTCommit *> *parents;
+@property (nonatomic, readonly, copy) NSArray<GTOID *> *parentOIDs;
 @property (nonatomic, readonly) NSString * _Nullable message;
 @property (nonatomic, readonly) NSString *messageDetails;
 @property (nonatomic, readonly) NSString *messageSummary;

ObjectiveGit/GTCommit.m

@@ -53,6 +53,10 @@ - (git_commit *)git_commit {
 
 #pragma mark API
 
+- (GTOID *)OID {
+	return [GTOID oidWithGitOid:git_commit_id(self.git_commit)];
+}
+
 - (NSString *)message {
 	const char *s = git_commit_message(self.git_commit);
 	if(s == NULL) return nil;
@@ -117,6 +121,19 @@ - (BOOL)isMerge {
 	return git_commit_parentcount(self.git_commit) > 1;
 }
 
+- (NSArray <GTOID *> *)parentOIDs {
+	unsigned numberOfParents = git_commit_parentcount(self.git_commit);
+	NSMutableArray <GTOID *> *parents = [NSMutableArray arrayWithCapacity:numberOfParents];
+
+	for (unsigned i = 0; i < numberOfParents; i++) {
+		const git_oid *parent = git_commit_parent_id(self.git_commit, i);
+
+		[parents addObject:[GTOID oidWithGitOid:parent]];
+	}
+
+	return parents;
+}
+
 - (NSArray *)parents {
 	unsigned numberOfParents = git_commit_parentcount(self.git_commit);
 	NSMutableArray *parents = [NSMutableArray arrayWithCapacity:numberOfParents];

ObjectiveGitTests/GTCommitSpec.m

@@ -31,6 +31,7 @@
 	expect(commit).to(beAnInstanceOf(GTCommit.class));
 	expect(commit.type).to(equal(@"commit"));
 	expect(commit.SHA).to(equal(commitSHA));
+	expect(commit.OID).to(equal([GTOID oidWithSHA:commitSHA]));
 
 	expect(commit.message).to(equal(@"testing\n"));
 	expect(commit.messageSummary).to(equal(@"testing"));
@@ -60,7 +61,14 @@
 	expect(commit).notTo(beNil());
 	expect(error).to(beNil());
 
-	expect(@(commit.parents.count)).to(equal(@2));
+	NSArray *commitOIDs = @[@"c47800c7266a2be04c571c04d5a6614691ea99bd", @"9fd738e8f7967c078dceed8190330fc8648ee56a"];
+	NSArray *commitParents = commit.parentOIDs;
+	expect(@(commitParents.count)).to(equal(@(commitOIDs.count)));
+	expect([commitParents valueForKey:@"SHA"]).to(equal(commitOIDs));
+
+	commitParents = commit.parents;
+	expect(@(commitParents.count)).to(equal(@(commitOIDs.count)));
+	expect([commitParents valueForKeyPath:@"OID.SHA"]).to(equal(commitOIDs));
 });
 
 it(@"can identify merges", ^{