Add -[GTTag delete:]

Author: tiennou

ObjectiveGit/GTTag.h

@@ -59,6 +59,9 @@ NS_ASSUME_NONNULL_BEGIN
 /// Returns the found object or nil on error.
 - (id _Nullable)objectByPeelingTagError:(NSError **)error;
 
+/// Delete the receiver.
+- (BOOL)delete:(NSError **)error;
+
 /// The underlying `git_object` as a `git_tag` object.
 - (git_tag *)git_tag __attribute__((objc_returns_inner_pointer));
 

ObjectiveGit/GTTag.m

@@ -84,4 +84,13 @@ - (id)objectByPeelingTagError:(NSError **)error {
 	return [[GTObject alloc] initWithObj:target inRepository:self.repository];
 }
 
+- (BOOL)delete:(NSError **)error {
+	int gitError = git_tag_delete(self.repository.git_repository, self.name.UTF8String);
+	if (gitError != GIT_OK) {
+		if (error) *error = [NSError git_errorFor:gitError description:@"Tag deletion failed"];
+		return NO;
+	}
+	return YES;
+}
+
 @end

ObjectiveGitTests/GTTagSpec.m

@@ -39,6 +39,18 @@
 	expect(signature.email).to(equal(@"schacon@gmail.com"));
 });
 
+it(@"can delete tags", ^{
+	NSError *error = nil;
+
+	BOOL success = [tag delete:&error];
+	expect(@(success)).to(beTruthy());
+	expect(error).to(beNil());
+
+	success = [tag delete:&error];
+	expect(@(success)).to(beFalsy());
+	expect(error).notTo(beNil());
+});
+
 afterEach(^{
 	[self tearDown];
 });