Added two new objective c wrappers for libgit2

ObjectiveGit/GTDiffPatch.h

@@ -50,6 +50,9 @@
 /// Returns the raw size of the delta, in bytes.
 - (NSUInteger)sizeWithContext:(BOOL)includeContext hunkHeaders:(BOOL)includeHunkHeaders fileHeaders:(BOOL)includeFileHeaders;
 
+/// Returns the raw patch data.
+- (NSData *)patchData;
+
 /// Enumerate the hunks contained in the patch.
 ///
 /// This enumeration is synchronous, and will block the calling thread while

ObjectiveGit/GTDiffPatch.m

@@ -59,6 +59,16 @@ - (NSUInteger)sizeWithContext:(BOOL)includeContext hunkHeaders:(BOOL)includeHunk
 	return git_patch_size(self.git_patch, includeContext, includeHunkHeaders, includeFileHeaders);
 }
 
+- (NSData *)patchData {
+	git_buf buf = GIT_BUF_INIT_CONST(0, NULL);
+	git_patch_to_buf(&buf, self.git_patch);
+
+	NSData *buffer = [[NSData alloc] initWithBytes:buf.ptr length:buf.size];
+	git_buf_free(&buf);
+
+	return buffer;
+}
+
 #pragma mark Hunks
 
 - (BOOL)enumerateHunksUsingBlock:(void (^)(GTDiffHunk *hunk, BOOL *stop))block {

ObjectiveGit/GTTree.h

@@ -50,20 +50,27 @@ typedef NS_ENUM(NSInteger, GTTreeEnumerationOptions) {
 /// The underlying `git_object` as a `git_tree` object.
 - (git_tree *)git_tree __attribute__((objc_returns_inner_pointer));
 
-/// Get a entry at the specified index
+/// Get an entry at the specified index
 ///
 /// index - index to retreive entry from
 ///
 /// returns a GTTreeEntry or nil if there is nothing at the index
 - (GTTreeEntry *)entryAtIndex:(NSUInteger)index;
 
-/// Get a entry by name
+/// Get an entry by name
 ///
 /// name - the name of the entry
 ///
 /// returns a GTTreeEntry or nil if there is nothing with the specified name
 - (GTTreeEntry *)entryWithName:(NSString *)name;
 
+/// Get an entry by path
+///
+/// path - the path of the entry relative to the repository root
+///
+/// returns a GTTreeEntry or nil if there is nothing with the specified path
+- (GTTreeEntry *)entryWithPath:(NSString *)path error:(NSError **)error;
+
 /// Enumerates the contents of the tree
 ///
 /// options -  One of `GTTreeEnumerationOptionPre` (for pre-order walks) or

ObjectiveGit/GTTree.m

@@ -56,16 +56,29 @@ - (NSUInteger)entryCount {
 	return (NSUInteger)git_tree_entrycount(self.git_tree);
 }
 
-- (GTTreeEntry *)createEntryWithEntry:(const git_tree_entry *)entry {
-	return (entry != NULL ? [GTTreeEntry entryWithEntry:entry parentTree:self] : nil);
+- (GTTreeEntry *)createEntryWithEntry:(const git_tree_entry *)entry error:(NSError **)error {
+	return (entry != NULL ? [GTTreeEntry entryWithEntry:entry parentTree:self error:nil] : nil);
 }
 
 - (GTTreeEntry *)entryAtIndex:(NSUInteger)index {
-	return [self createEntryWithEntry:git_tree_entry_byindex(self.git_tree, index)];
+	return [self createEntryWithEntry:git_tree_entry_byindex(self.git_tree, index) error:nil];
 }
 
 - (GTTreeEntry *)entryWithName:(NSString *)name {
-	return [self createEntryWithEntry:git_tree_entry_byname(self.git_tree, name.UTF8String)];
+	return [self createEntryWithEntry:git_tree_entry_byname(self.git_tree, name.UTF8String) error:nil];
+}
+
+- (GTTreeEntry *)entryWithPath:(NSString *)path error:(NSError **)error {
+	git_tree_entry *internalEntry = NULL;
+	int gitError = git_tree_entry_bypath(&internalEntry, self.git_tree, path.UTF8String);
+	if (error != GIT_OK) {
+		if (error != NULL) *error = [NSError git_errorFor:gitError description:@"Failed to get tree entry %@", path];
+		return nil;
+	}
+
+	GTTreeEntry *entry = [self createEntryWithEntry:internalEntry error:error];
+	git_tree_entry_free(internalEntry);
+	return entry;
 }
 
 - (git_tree *)git_tree {
@@ -79,7 +92,7 @@ static int treewalk_cb(const char *root, const git_tree_entry *git_entry, void *
 	NSString *rootString = @(root);
 	GTTreeEntry *parentEntry = enumerationStruct->directoryStructure[rootString];
 	GTTree *parentTree = parentEntry != nil ? parentEntry.tree : enumerationStruct->myself;
-	GTTreeEntry *entry = [GTTreeEntry entryWithEntry:git_entry parentTree:parentTree];
+	GTTreeEntry *entry = [GTTreeEntry entryWithEntry:git_entry parentTree:parentTree error:nil];
 
 	if (entry.type == GTObjectTypeTree) {
 		NSString *path = [rootString stringByAppendingPathComponent:entry.name];

ObjectiveGit/GTTreeBuilder.m

@@ -110,7 +110,7 @@ - (GTTreeEntry *)entryWithFileName:(NSString *)fileName {
 	const git_tree_entry *entry = git_treebuilder_get(self.git_treebuilder, fileName.UTF8String);
 	if (entry == NULL) return nil;
 
-	return [GTTreeEntry entryWithEntry:entry parentTree:nil];
+	return [GTTreeEntry entryWithEntry:entry parentTree:nil error:nil];
 }
 
 - (GTTreeEntry *)addEntryWithData:(NSData *)data fileName:(NSString *)fileName fileMode:(GTFileMode)fileMode error:(NSError **)error {
@@ -139,7 +139,7 @@ - (GTTreeEntry *)addEntryWithOID:(GTOID *)oid fileName:(NSString *)fileName file
 		return nil;
 	}
 
-	return [GTTreeEntry entryWithEntry:entry parentTree:nil];
+	return [GTTreeEntry entryWithEntry:entry parentTree:nil error:error];
 }
 
 - (BOOL)removeEntryWithFileName:(NSString *)fileName error:(NSError **)error {

ObjectiveGit/GTTreeEntry.h

@@ -34,11 +34,11 @@
 @interface GTTreeEntry : NSObject
 
 /// Initializer and convience methods.
-- (instancetype)initWithEntry:(const git_tree_entry *)theEntry parentTree:(GTTree *)parent;
-+ (instancetype)entryWithEntry:(const git_tree_entry *)theEntry parentTree:(GTTree *)parent;
+- (instancetype)initWithEntry:(const git_tree_entry *)theEntry parentTree:(GTTree *)parent error:(NSError **)error;
++ (instancetype)entryWithEntry:(const git_tree_entry *)theEntry parentTree:(GTTree *)parent error:(NSError **)error;
 
 /// The underlying `git_tree_entry`.
-- (const git_tree_entry *)git_tree_entry __attribute__((objc_returns_inner_pointer));
+- (git_tree_entry *)git_tree_entry __attribute__((objc_returns_inner_pointer));
 
 /// The entry's parent tree. This may be nil if nil is passed in to -initWithEntry:
 @property (nonatomic, strong, readonly) GTTree *tree;

ObjectiveGit/GTTreeEntry.m

@@ -38,7 +38,7 @@
 #import "git2/errors.h"
 
 @interface GTTreeEntry ()
-@property (nonatomic, assign, readonly) const git_tree_entry *git_tree_entry;
+@property (nonatomic, assign, readonly) git_tree_entry *git_tree_entry;
 @end
 
 @implementation GTTreeEntry
@@ -64,19 +64,33 @@ - (BOOL)isEqualToEntry:(GTTreeEntry *)treeEntry {
 	return git_tree_entry_cmp(self.git_tree_entry, treeEntry.git_tree_entry) == 0 ? YES : NO;
 }
 
+- (void)dealloc {
+	git_tree_entry_free(_git_tree_entry);
+}
+
 #pragma mark API
 
-- (instancetype)initWithEntry:(const git_tree_entry *)theEntry parentTree:(GTTree *)parent {
+- (instancetype)initWithEntry:(const git_tree_entry *)theEntry parentTree:(GTTree *)parent error:(NSError **)error {
 	NSParameterAssert(theEntry != NULL);
-	if((self = [super init])) {
-		_git_tree_entry = theEntry;
-		_tree = parent;
+
+	self = [super init];
+	if (self == nil) return nil;
+
+	git_tree_entry *copyOfEntry = nil;
+	int gitError = git_tree_entry_dup(&copyOfEntry, theEntry);
+	if (gitError != GIT_OK) {
+		if (error != NULL) *error = [NSError git_errorFor:gitError description:@"Failed to duplicate tree entry."];
+		return nil;
 	}
+
+	_git_tree_entry = copyOfEntry;
+	_tree = parent;
+
 	return self;
 }
 
-+ (instancetype)entryWithEntry:(const git_tree_entry *)theEntry parentTree:(GTTree *)parent {
-	return [[self alloc] initWithEntry:theEntry parentTree:parent];
++ (instancetype)entryWithEntry:(const git_tree_entry *)theEntry parentTree:(GTTree *)parent error:(NSError **)error {
+	return [[self alloc] initWithEntry:theEntry parentTree:parent error:error];
 }
 
 - (NSString *)name {

ObjectiveGitFramework.xcodeproj/project.pbxproj

@@ -311,6 +311,13 @@
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
+		3D6123BD1A6432F6008F831A /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 0867D690FE84028FC02AAC07 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = D0A330ED16027F1E00A616FA;
+			remoteInfo = libgit2;
+		};
 		6A28265A17C69D6300C6A948 /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
 			containerPortal = 0867D690FE84028FC02AAC07 /* Project object */;
@@ -346,13 +353,6 @@
 			remoteGlobalIDString = D0A330F216027F3600A616FA;
 			remoteInfo = "libgit2-iOS";
 		};
-		D0A330F716027F4900A616FA /* PBXContainerItemProxy */ = {
-			isa = PBXContainerItemProxy;
-			containerPortal = 0867D690FE84028FC02AAC07 /* Project object */;
-			proxyType = 1;
-			remoteGlobalIDString = D0A330ED16027F1E00A616FA;
-			remoteInfo = libgit2;
-		};
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXCopyFilesBuildPhase section */
@@ -1094,7 +1094,7 @@
 			buildRules = (
 			);
 			dependencies = (
-				D0A330F816027F4900A616FA /* PBXTargetDependency */,
+				3D6123BE1A6432F6008F831A /* PBXTargetDependency */,
 			);
 			name = "ObjectiveGit-Mac";
 			productInstallPath = "$(HOME)/Library/Frameworks";
@@ -1396,6 +1396,11 @@
 /* End PBXSourcesBuildPhase section */
 
 /* Begin PBXTargetDependency section */
+		3D6123BE1A6432F6008F831A /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = D0A330ED16027F1E00A616FA /* libgit2 */;
+			targetProxy = 3D6123BD1A6432F6008F831A /* PBXContainerItemProxy */;
+		};
 		6A28265B17C69D6300C6A948 /* PBXTargetDependency */ = {
 			isa = PBXTargetDependency;
 			target = 6A28265217C69CB400C6A948 /* OpenSSL-iOS */;
@@ -1421,11 +1426,6 @@
 			target = D0A330F216027F3600A616FA /* libgit2-iOS */;
 			targetProxy = D019779619F8335100F523DA /* PBXContainerItemProxy */;
 		};
-		D0A330F816027F4900A616FA /* PBXTargetDependency */ = {
-			isa = PBXTargetDependency;
-			target = D0A330ED16027F1E00A616FA /* libgit2 */;
-			targetProxy = D0A330F716027F4900A616FA /* PBXContainerItemProxy */;
-		};
 /* End PBXTargetDependency section */
 
 /* Begin PBXVariantGroup section */