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GTRepository.m
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GTRepository.m
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//
// GTRepository.m
// ObjectiveGitFramework
//
// Created by Timothy Clem on 2/17/11.
//
// The MIT License
//
// Copyright (c) 2011 Tim Clem
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
#import "GTRepository.h"
#import "GTEnumerator.h"
#import "GTObject.h"
#import "GTCommit.h"
#import "GTObjectDatabase.h"
#import "GTIndex.h"
#import "GTBranch.h"
#import "GTTag.h"
#import "NSError+Git.h"
#import "NSString+Git.h"
@interface GTRepository ()
@property (nonatomic, assign) git_repository *git_repository;
@property (nonatomic, strong) NSURL *fileURL;
@property (nonatomic, strong) GTEnumerator *enumerator;
@property (nonatomic, strong) GTIndex *index;
@property (nonatomic, strong) GTObjectDatabase *objectDatabase;
@end
@implementation GTRepository
@synthesize enumerator;
- (NSString *)description {
return [NSString stringWithFormat:@"<%@: %p> fileURL: %@", NSStringFromClass([self class]), self, self.fileURL];
}
- (void)dealloc {
// we need to make sure the enumerator gets released before the repository is freed
if(enumerator != nil) {
enumerator.repository = nil;
self.enumerator = nil;
}
if(self.git_repository != NULL) git_repository_free(self.git_repository);
}
#pragma mark API
+ (BOOL)isAGitDirectory:(NSURL *)directory {
NSFileManager *fm = [[NSFileManager alloc] init];
BOOL isDir = NO;
NSURL *headFileURL = [directory URLByAppendingPathComponent:@"HEAD"];
if([fm fileExistsAtPath:[headFileURL path] isDirectory:&isDir] && !isDir) {
NSURL *objectsDir = [directory URLByAppendingPathComponent:@"objects"];
if([fm fileExistsAtPath:[objectsDir path] isDirectory:&isDir] && isDir) {
return YES;
}
}
return NO;
}
+ (NSURL *)_gitURLForURL:(NSURL *)url error:(NSError **)error {
if ([url isFileURL] == NO) {
if (error != NULL) {
*error = [NSError errorWithDomain:NSCocoaErrorDomain code:kCFURLErrorUnsupportedURL userInfo:[NSDictionary dictionaryWithObject:@"not a local file URL" forKey:NSLocalizedDescriptionKey]];
}
return nil;
}
if ([[url path] hasSuffix:@".git"] == NO || [GTRepository isAGitDirectory:url] == NO) {
url = [url URLByAppendingPathComponent:@".git"];
}
return url;
}
+ (BOOL)initializeEmptyRepositoryAtURL:(NSURL *)localFileURL error:(NSError **)error {
const char *path = [[localFileURL path] UTF8String];
git_repository *r;
int gitError = git_repository_init(&r, path, 0);
if (gitError < GIT_SUCCESS) {
if (error != NULL) {
*error = [NSError git_errorFor:gitError withDescription:@"Failed to initialize repository."];
}
}
return (gitError == GIT_SUCCESS);
}
+ (id)repositoryWithURL:(NSURL *)localFileURL error:(NSError **)error {
return [[self alloc] initWithURL:localFileURL error:error];
}
@synthesize git_repository;
@synthesize fileURL;
@synthesize index;
@synthesize objectDatabase;
- (id)initWithURL:(NSURL *)localFileURL error:(NSError **)error {
localFileURL = [[self class] _gitURLForURL:localFileURL error:error];
if (localFileURL == nil) {
return nil;
}
self = [super init];
if (self) {
git_repository *r;
int gitError = git_repository_open(&r, [[localFileURL path] UTF8String]);
if (gitError < GIT_SUCCESS) {
if (error != NULL) {
*error = [NSError git_errorFor:gitError withDescription:@"Failed to open repository."];
}
return nil;
}
self.git_repository = r;
self.fileURL = localFileURL;
}
return self;
}
+ (NSString *)hash:(NSString *)data objectType:(GTObjectType)type error:(NSError **)error {
git_oid oid;
int gitError = git_odb_hash(&oid, [data UTF8String], [data length], (git_otype) type);
if(gitError < GIT_SUCCESS) {
if (error != NULL)
*error = [NSError git_errorFor:gitError withDescription:@"Failed to get hash for object."];
return nil;
}
return [NSString git_stringWithOid:&oid];
}
- (GTObject *)lookupObjectByOid:(git_oid *)oid objectType:(GTObjectType)type error:(NSError **)error {
git_object *obj;
int gitError = git_object_lookup(&obj, self.git_repository, oid, (git_otype) type);
if(gitError < GIT_SUCCESS) {
if(error != NULL)
*error = [NSError git_errorFor:gitError withDescription:@"Failed to lookup object in repository."];
return nil;
}
return [GTObject objectWithObj:obj inRepository:self];
}
- (GTObject *)lookupObjectByOid:(git_oid *)oid error:(NSError **)error {
return [self lookupObjectByOid:oid objectType:GTObjectTypeAny error:error];
}
- (GTObject *)lookupObjectBySha:(NSString *)sha objectType:(GTObjectType)type error:(NSError **)error {
git_oid oid;
int gitError = git_oid_fromstr(&oid, [sha UTF8String]);
if(gitError < GIT_SUCCESS) {
if(error != NULL)
*error = [NSError git_errorForMkStr:gitError];
return nil;
}
return [self lookupObjectByOid:&oid objectType:type error:error];
}
- (GTObject *)lookupObjectBySha:(NSString *)sha error:(NSError **)error {
return [self lookupObjectBySha:sha objectType:GTObjectTypeAny error:error];
}
- (BOOL)enumerateCommitsBeginningAtSha:(NSString *)sha sortOptions:(GTEnumeratorOptions)options error:(NSError **)error usingBlock:(void (^)(GTCommit *, BOOL *))block {
if(block == nil) {
if(error != NULL)
*error = [NSError git_errorWithDescription:@"No block was provided to the method."];
return NO;
}
if(sha == nil) {
GTReference *head = [self headReferenceWithError:error];
if(head == nil) return NO;
sha = head.target;
}
[self.enumerator reset];
[self.enumerator setOptions:options];
BOOL success = [self.enumerator push:sha error:error];
if(!success) return NO;
GTCommit *commit = nil;
while((commit = [self.enumerator nextObjectWithError:error]) != nil) {
BOOL stop = NO;
block(commit, &stop);
if(stop) break;
}
if(error == NULL) {
return YES;
}
return *error == nil;
}
- (BOOL)enumerateCommitsBeginningAtSha:(NSString *)sha error:(NSError **)error usingBlock:(void (^)(GTCommit *, BOOL *))block; {
return [self enumerateCommitsBeginningAtSha:sha sortOptions:GTEnumeratorOptionsTimeSort error:error usingBlock:block];
}
- (NSArray *)selectCommitsBeginningAtSha:(NSString *)sha error:(NSError **)error block:(BOOL (^)(GTCommit *commit, BOOL *stop))block {
NSMutableArray *passingCommits = [NSMutableArray array];
[self enumerateCommitsBeginningAtSha:sha error:error usingBlock:^(GTCommit *commit, BOOL *stop) {
BOOL passes = block(commit, stop);
if(passes) {
[passingCommits addObject:commit];
}
}];
return passingCommits;
}
- (BOOL)setupIndexWithError:(NSError **)error {
git_index *i;
int gitError = git_repository_index(&i, self.git_repository);
if(gitError < GIT_SUCCESS) {
if(error != NULL)
*error = [NSError git_errorFor:gitError withDescription:@"Failed to get index for repository."];
return NO;
}
else {
self.index = [GTIndex indexWithGitIndex:i];
return YES;
}
}
- (GTReference *)headReferenceWithError:(NSError **)error {
GTReference *headSymRef = [GTReference referenceByLookingUpReferencedNamed:@"HEAD" inRepository:self error:error];
if(headSymRef == nil) return nil;
return [GTReference referenceByResolvingSymbolicReference:headSymRef error:error];
}
- (NSArray *)localBranchesWithError:(NSError **)error {
return [self branchesWithPrefix:[GTBranch localNamePrefix] error:error];
}
- (NSArray *)remoteBranchesWithError:(NSError **)error {
static NSArray *unwantedRemoteBranches = nil;
if(unwantedRemoteBranches == nil) {
unwantedRemoteBranches = [NSArray arrayWithObjects:@"HEAD", nil];
}
NSArray *remoteBranches = [self branchesWithPrefix:[GTBranch remoteNamePrefix] error:error];
if(remoteBranches == nil) return nil;
NSMutableArray *filteredList = [NSMutableArray arrayWithCapacity:remoteBranches.count];
for(GTBranch *branch in remoteBranches) {
if(![unwantedRemoteBranches containsObject:branch.shortName]) {
[filteredList addObject:branch];
}
}
return filteredList;
}
- (NSArray *)branchesWithPrefix:(NSString *)prefix error:(NSError **)error {
NSArray *references = [self referenceNamesWithError:error];
if(references == nil) return nil;
NSMutableArray *branches = [NSMutableArray array];
for(NSString *ref in references) {
if([ref hasPrefix:prefix]) {
GTBranch *b = [GTBranch branchWithName:ref repository:self error:error];
if(b != nil)
[branches addObject:b];
}
}
return branches;
}
- (NSArray *)allBranchesWithError:(NSError **)error {
NSMutableArray *allBranches = [NSMutableArray array];
NSArray *localBranches = [self localBranchesWithError:error];
NSArray *remoteBranches = [self remoteBranchesWithError:error];
if(localBranches == nil || remoteBranches == nil) return nil;
[allBranches addObjectsFromArray:localBranches];
// we want to add the remote branches that we don't already have as a local branch
NSMutableDictionary *shortNamesToBranches = [NSMutableDictionary dictionary];
for(GTBranch *branch in localBranches) {
[shortNamesToBranches setObject:branch forKey:branch.shortName];
}
for(GTBranch *branch in remoteBranches) {
GTBranch *localBranch = [shortNamesToBranches objectForKey:branch.shortName];
if(localBranch == nil) {
[allBranches addObject:branch];
}
NSMutableArray *branches = [NSMutableArray array];
if(localBranch.remoteBranches != nil) {
[branches addObjectsFromArray:localBranch.remoteBranches];
}
[branches addObject:branch];
localBranch.remoteBranches = branches;
}
return allBranches;
}
- (NSUInteger)numberOfCommitsInCurrentBranch:(NSError **)error {
GTReference *head = [self headReferenceWithError:error];
if(head == nil) return NSNotFound;
return [self.enumerator countFromSha:head.target error:error];
}
- (GTBranch *)createBranchNamed:(NSString *)name fromReference:(GTReference *)ref error:(NSError **)error {
GTReference *newRef = [GTReference referenceByCreatingReferenceNamed:[NSString stringWithFormat:@"%@%@", [GTBranch localNamePrefix], name] fromReferenceTarget:[ref target] inRepository:self error:error];
return [GTBranch branchWithReference:newRef repository:self];
}
- (BOOL)isEmpty {
return (BOOL) git_repository_is_empty(self.git_repository);
}
- (GTBranch *)currentBranchWithError:(NSError **)error {
GTReference *head = [self headReferenceWithError:error];
if (head == nil) return nil;
GTBranch *currentBranch = [GTBranch branchWithReference:head repository:self];
NSArray *remoteBranches = [self remoteBranchesWithError:error];
NSMutableArray *matchedRemoteBranches = [NSMutableArray array];
for(GTBranch *branch in remoteBranches) {
if([branch.shortName isEqualToString:currentBranch.shortName]) {
[matchedRemoteBranches addObject:branch];
}
}
currentBranch.remoteBranches = matchedRemoteBranches;
return currentBranch;
}
- (NSArray *)localCommitsRelativeToRemoteBranch:(GTBranch *)remoteBranch error:(NSError **)error {
if(remoteBranch == nil) {
return [NSArray array];
}
GTBranch *localBranch = [self currentBranchWithError:error];
if(localBranch == nil) {
return nil;
}
GTEnumerator *localBranchEnumerator = [GTEnumerator enumeratorWithRepository:self error:error];
if(localBranchEnumerator == nil) {
return nil;
}
[localBranchEnumerator setOptions:GTEnumeratorOptionsTopologicalSort];
BOOL success = [localBranchEnumerator push:localBranch.sha error:error];
if(!success) {
return nil;
}
NSString *remoteBranchTip = remoteBranch.sha;
NSMutableArray *commits = [NSMutableArray array];
GTCommit *currentCommit = [localBranchEnumerator nextObjectWithError:error];
while(currentCommit != nil) {
if([currentCommit.sha isEqualToString:remoteBranchTip]) {
break;
}
[commits addObject:currentCommit];
currentCommit = [localBranchEnumerator nextObjectWithError:error];
}
return commits;
}
- (NSArray *)referenceNamesWithTypes:(GTReferenceTypes)types error:(NSError **)error {
git_strarray array;
int gitError = git_reference_listall(&array, self.git_repository, types);
if(gitError < GIT_SUCCESS) {
if(error != NULL)
*error = [NSError git_errorFor:gitError withDescription:@"Failed to list all references."];
return nil;
}
NSMutableArray *references = [NSMutableArray arrayWithCapacity:array.count];
for(NSUInteger i = 0; i< array.count; i++) {
[references addObject:[NSString stringWithUTF8String:array.strings[i]]];
}
git_strarray_free(&array);
return references;
}
- (NSArray *)referenceNamesWithError:(NSError **)error {
return [self referenceNamesWithTypes:GTReferenceTypesListAll error:error];
}
- (GTRepository *)repository {
return self;
}
- (GTObjectDatabase *)objectDatabase {
if(objectDatabase == nil) {
self.objectDatabase = [GTObjectDatabase objectDatabaseWithRepository:self];
}
return objectDatabase;
}
- (GTEnumerator *)enumerator {
if(enumerator == nil) {
self.enumerator = [[GTEnumerator alloc] initWithRepository:self error:NULL];
}
return enumerator;
}
- (BOOL)isBare {
return self.git_repository && git_repository_is_bare(self.git_repository);
}
- (BOOL)isHeadDetached {
return (BOOL) git_repository_head_detached(self.git_repository);
}
@end