Added support for [GTRepository pushNotes:...]

Author: slavikus

ObjectiveGit/GTRepository+RemoteOperations.h

@@ -97,6 +97,20 @@ typedef NS_ENUM(NSInteger, GTFetchPruneOption) {
 /// will point to an error describing what happened).
 - (BOOL)pushBranches:(NSArray<GTBranch *> *)branches toRemote:(GTRemote *)remote withOptions:(nullable NSDictionary *)options error:(NSError **)error progress:(nullable void (^)(unsigned int current, unsigned int total, size_t bytes, BOOL *stop))progressBlock;
 
+/// Push a given Git notes reference name to a remote.
+///
+/// noteRef       - Name of the notes reference. If NULL, will default to whatever the default is (e.g. "refs/notes/commits")
+/// remote        - The remote to push to. Must not be nil.
+/// options       - Options applied to the push operation. Can be NULL.
+///                 Recognized options are:
+///                 `GTRepositoryRemoteOptionsCredentialProvider`
+/// error         - The error if one occurred. Can be NULL.
+/// progressBlock - An optional callback for monitoring progress. May be NULL.
+///
+/// Returns YES if the push was successful, NO otherwise (and `error`, if provided,
+/// will point to an error describing what happened).
+- (BOOL)pushNotes:(nullable NSString *)noteRef toRemote:(GTRemote *)remote withOptions:(nullable NSDictionary *)options error:(NSError **)error progress:(nullable void (^)(unsigned int current, unsigned int total, size_t bytes, BOOL *stop))progressBlock;
+
 /// Delete a remote branch
 ///
 /// branch        - The branch to push. Must not be nil.

ObjectiveGit/GTRepository+RemoteOperations.m

@@ -21,6 +21,8 @@
 
 #import "git2/errors.h"
 #import "git2/remote.h"
+#import "git2/notes.h"
+#import "git2/buffer.h"
 
 NSString *const GTRepositoryRemoteOptionsCredentialProvider = @"GTRepositoryRemoteOptionsCredentialProvider";
 NSString *const GTRepositoryRemoteOptionsFetchPrune = @"GTRepositoryRemoteOptionsFetchPrune";
@@ -198,6 +200,28 @@ - (BOOL)pushBranches:(NSArray *)branches toRemote:(GTRemote *)remote withOptions
 	return [self pushRefspecs:refspecs toRemote:remote withOptions:options error:error progress:progressBlock];
 }
 
+- (BOOL)pushNotes:(NSString *)noteRef toRemote:(GTRemote *)remote withOptions:(NSDictionary *)options error:(NSError **)error progress:(GTRemotePushTransferProgressBlock)progressBlock {
+	NSParameterAssert(remote != nil);
+	
+	if (noteRef == nil) {
+		git_buf default_ref_name = { 0 };
+		int gitErr = git_note_default_ref(&default_ref_name, self.git_repository);
+		if (gitErr != GIT_OK) {
+			git_buf_free(&default_ref_name);
+			
+			if (error != NULL) {
+				*error = [NSError git_errorFor:gitErr description:@"Unable to get default git notes reference name"];
+			}
+			
+			return NO;
+		}
+		
+		noteRef = [NSString stringWithUTF8String:default_ref_name.ptr];
+	}
+	
+	return [self pushRefspecs:@[[NSString stringWithFormat:@"%@:%@", noteRef, noteRef]] toRemote:remote withOptions:options error:error progress:progressBlock];
+}
+
 #pragma mark - Deletion (Public)
 - (BOOL)deleteBranch:(GTBranch *)branch fromRemote:(GTRemote *)remote withOptions:(NSDictionary *)options error:(NSError **)error {
 	NSParameterAssert(branch != nil);