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GCCommitDatabase.m
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// Copyright (C) 2015 Pierre-Olivier Latour <info@pol-online.net>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#if __has_feature(objc_arc)
#error This file requires MRC
#endif
#import <sqlite3.h>
#import "GCPrivate.h"
#define __UNIQUE_RELATIONS__ 1
#define __CHECK_CONSISTENCY__ 0
#define kSchemaVersion 3
#define kTipsTableName "tips"
#define kCommitsTableName "commits"
#define kRelationsTableName "relations"
#define kUsersTableName "users"
#define kFTSPrefix "fts_"
#define kFTSMessagesTableName kFTSPrefix "messages"
#define kFTSDiffsTableName kFTSPrefix "diffs"
#define kFTSUsersTableName kFTSPrefix "users"
#define kMinWordLength 2
#define kWordCacheSize 1024
#define kMaxFileSizeForTextDiff (32 * 1024 * 1024) // libgit2 default is 512 MiB
#define IS_ALPHANUMERICAL(c) (((c) >= '0' && (c) <= '9') || ((c) >= 'A' && (c) <= 'Z') || ((c) >= 'a' && (c) <='z'))
#define IS_DELIMITER(c) (((c) < 0x80) && !IS_ALPHANUMERICAL(c) && ((c) != '_')) // Don't split tokens on '_'
#define SET_BIT(a, n) (a[(n) / CHAR_BIT] |= (1 << ((n) % CHAR_BIT)))
#define GET_BIT(a, n) (a[(n) / CHAR_BIT] & (1 << ((n) % CHAR_BIT)))
#define LOG_SQLITE_ERROR(__CODE__) \
do { \
XLOG_DEBUG_CHECK((__CODE__ != SQLITE_OK) && (__CODE__ != SQLITE_DONE)); \
XLOG_ERROR(@"sqlite3 error (%i): %s", __CODE__, sqlite3_errmsg(_database)); \
} \
while (0)
#define CHECK_SQLITE_FUNCTION_CALL(__FAIL_ACTION__, __STATUS__, __COMPARISON__) \
do { \
if (!(__STATUS__ __COMPARISON__)) { \
LOG_SQLITE_ERROR(__STATUS__); \
if (error) { \
*error = _NewSQLiteError(__STATUS__, sqlite3_errmsg(_database)); \
} \
__FAIL_ACTION__; \
} \
} while(0)
#define CALL_SQLITE_FUNCTION_RETURN(__RETURN_VALUE_ON_ERROR__, __FUNCTION__, ...) \
do { \
int __callResult = __FUNCTION__(__VA_ARGS__); \
CHECK_SQLITE_FUNCTION_CALL(return __RETURN_VALUE_ON_ERROR__, __callResult, == SQLITE_OK); \
} while(0)
#define CALL_SQLITE_FUNCTION_GOTO(__GOTO_LABEL__, __FUNCTION__, ...) \
do { \
int __callResult = __FUNCTION__(__VA_ARGS__); \
CHECK_SQLITE_FUNCTION_CALL(goto __GOTO_LABEL__, __callResult, == SQLITE_OK); \
} while(0)
typedef NS_ENUM(int, Statement) {
kStatement_BeginTransaction = 0,
kStatement_ListTipSHA1s,
kStatement_FindCommitID,
kStatement_LookupCommitParentIDs,
kStatement_AddTip,
kStatement_AddCommit,
kStatement_FindUserID,
kStatement_AddUser,
kStatement_AddRelation,
kStatement_DeleteTip,
kStatement_RetainCommit,
kStatement_ReleaseCommit,
kStatement_DeleteOrphanCommit,
kStatement_DeleteCommitRelations,
kStatement_AddFTSUser,
kStatement_AddFTSMessage,
kStatement_AddFTSDiff,
kStatement_EndTransaction,
kStatement_SearchCommits,
kNumStatements
};
typedef struct {
const unsigned char* start;
size_t length;
} Word;
typedef struct {
git_commit* commit;
sqlite3_int64 childID;
} Item;
NSString* const SQLiteErrorDomain = @"SQLiteErrorDomain";
static NSError* _NewSQLiteError(int code, const char* message) {
return [NSError errorWithDomain:SQLiteErrorDomain
code:code
userInfo:@{NSLocalizedDescriptionKey: [NSString stringWithUTF8String:message]}];
}
// TODO: Consider using triggers to handle retain/release
// TODO: Garbage collect users table
@implementation GCCommitDatabase {
sqlite3* _database;
sqlite3_stmt** _statements;
BOOL _ready;
}
static void _SQLiteLog(void* unused, int error, const char* message) {
if ((error & 0xFF) == SQLITE_NOTICE) {
XLOG_INFO(@"SQLite (%i): %s", error, message);
} else if ((error & 0xFF) == SQLITE_WARNING) {
const char* ignore = "2file renamed while open"; // TODO: This is sometimes triggered by sqlite3_step()?
if (strncmp(message, ignore, sizeof(ignore) - 1)) {
XLOG_WARNING(@"SQLite (%i): %s", error, message);
}
}
}
+ (void)initialize {
XLOG_CHECK(sqlite3_compileoption_used("THREADSAFE=2"));
XLOG_CHECK(sqlite3_compileoption_used("ENABLE_FTS3"));
XLOG_CHECK(sqlite3_compileoption_used("ENABLE_FTS3_PARENTHESIS"));
sqlite3_config(SQLITE_CONFIG_LOG, _SQLiteLog, NULL);
}
static int _CaseInsensitiveUTF8Compare(void* context, int length1, const void* bytes1, int length2, const void* bytes2) {
CFStringRef string1 = CFStringCreateWithBytesNoCopy(kCFAllocatorDefault, bytes1, length1, kCFStringEncodingUTF8, false, kCFAllocatorNull);
CFStringRef string2 = CFStringCreateWithBytesNoCopy(kCFAllocatorDefault, bytes2, length2, kCFStringEncodingUTF8, false, kCFAllocatorNull);;
CFComparisonResult result;
if (string1 && string2) {
result = CFStringCompare(string1, string2, kCFCompareCaseInsensitive);
CFRelease(string2);
CFRelease(string1);
} else if (string1) {
result = 1;
CFRelease(string1);
} else if (string2) {
result = -1;
CFRelease(string2);
} else {
result = 0;
}
return result;
}
- (BOOL)_initializeDatabase:(NSString*)path error:(NSError**)error {
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_open_v2, path.fileSystemRepresentation, &_database, SQLITE_OPEN_CREATE | SQLITE_OPEN_READWRITE | SQLITE_OPEN_NOMUTEX | SQLITE_OPEN_SHAREDCACHE, NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_extended_result_codes, _database, true);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "PRAGMA page_size = 32768", NULL, NULL, NULL); // Default appears to be 4096 on OS X
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "PRAGMA cache_size = 500", NULL, NULL, NULL); // Default appears to be 500 on OS X
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "PRAGMA journal_mode = WAL", NULL, NULL, NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_wal_autocheckpoint, _database, 0);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_create_collation, _database, "utf8", SQLITE_UTF8, NULL, _CaseInsensitiveUTF8Compare);
if (_options & kGCCommitDatabaseOptions_QueryOnly) {
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "PRAGMA query_only = 1", NULL, NULL, NULL);
}
return YES;
}
// Emails are considered case-insensitive with "COLLATE NOCASE" which only works with ASCII characters but that should be fine for emails
// TODO: Does the order of columns inside a table affect performance?
- (BOOL)_initializeSchema:(int)version error:(NSError**)error {
// Users table
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "CREATE TABLE " kUsersTableName "("
"_id_ INTEGER PRIMARY KEY,"
"email TEXT NOT NULL COLLATE NOCASE,"
"name TEXT COLLATE utf8"
")", NULL, NULL, NULL);
// Index to ensure unique email/name combinations and to search for users
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "CREATE UNIQUE INDEX " kUsersTableName "_email_name on " kUsersTableName "(email, name)", NULL, NULL, NULL);
// Commits table (with implicit index for "sha1")
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "CREATE TABLE " kCommitsTableName "("
"_id_ INTEGER PRIMARY KEY,"
"retain_count INTEGER NOT NULL,"
"sha1 BLOB UNIQUE NOT NULL,"
"time INTEGER NOT NULL,"
"offset INTEGER NOT NULL,"
"author INTEGER NOT NULL,"
"committer INTEGER NOT NULL,"
"parent_sha1s BLOB NOT NULL,"
"message TEXT NOT NULL"
")", NULL, NULL, NULL);
// Relations table
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "CREATE TABLE " kRelationsTableName "("
"_id_ INTEGER PRIMARY KEY,"
"child INTEGER NOT NULL,"
"parent INTEGER NOT NULL"
")", NULL, NULL, NULL);
// Index for finding parents of a given child (works as a covering index too)
#if __UNIQUE_RELATIONS__
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "CREATE UNIQUE INDEX " kRelationsTableName "_child_parent on " kRelationsTableName "(child, parent)", NULL, NULL, NULL);
#endif
// Tips table
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "CREATE TABLE " kTipsTableName "("
"_id_ INTEGER PRIMARY KEY,"
"`commit` INTEGER NOT NULL"
")", NULL, NULL, NULL);
// FTS for commit messages (external content)
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "CREATE VIRTUAL TABLE " kFTSMessagesTableName " USING fts4(content='" kCommitsTableName "', message, tokenize=unicode61 'tokenchars=_')", NULL, NULL, NULL); // Don't split tokens on '_'
// FTS for commit diffs (stored content)
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "CREATE VIRTUAL TABLE " kFTSDiffsTableName " USING fts4(added, deleted, tokenize=unicode61 'tokenchars=_')", NULL, NULL, NULL); // Don't split tokens on '_'
// FTS for users (external content)
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "CREATE VIRTUAL TABLE " kFTSUsersTableName " USING fts4(content='" kUsersTableName "', email, name, tokenize=unicode61)", NULL, NULL, NULL);
// Save version
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, [[NSString stringWithFormat:@"PRAGMA user_version = %i", version] UTF8String], NULL, NULL, NULL);
return YES;
}
// DELETE triggers are required because we must delete from FTS *before* deleting from content table which is impractical to do in -_removeCommitsForTip
// We don't need INSERT or UPDATE triggers since we never update content that is indexed by FTS
- (BOOL)_initializeTriggers:(NSError**)error {
// Triggers for FTS commits
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "\
CREATE TRIGGER " kCommitsTableName "_before_delete BEFORE DELETE ON " kCommitsTableName " BEGIN \
DELETE FROM " kFTSMessagesTableName " WHERE docid=old.rowid; \
DELETE FROM " kFTSDiffsTableName " WHERE docid=old.rowid; \
END; \
", NULL, NULL, NULL);
// Triggers for FTS users
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "\
CREATE TRIGGER " kUsersTableName "_before_delete BEFORE DELETE ON " kUsersTableName " BEGIN \
DELETE FROM " kFTSUsersTableName " WHERE docid=old.rowid; \
END; \
", NULL, NULL, NULL);
return YES;
}
- (BOOL)_initializeDeferredIndexes:(NSError**)error {
// Indexes for finding commits by author or comitter
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "CREATE INDEX " kCommitsTableName "_author on " kCommitsTableName "(author)", NULL, NULL, NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "CREATE INDEX " kCommitsTableName "_committer on " kCommitsTableName "(committer)", NULL, NULL, NULL);
#if !__UNIQUE_RELATIONS__
// Index for finding parents of a given child (works as a covering index too)
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "CREATE INDEX " kRelationsTableName "_child_parent on " kRelationsTableName "(child, parent)", NULL, NULL, NULL);
#endif
// Index for deleting tips by commit ID
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_exec, _database, "CREATE INDEX " kTipsTableName "_commit on " kTipsTableName "(`commit`)", NULL, NULL, NULL);
return YES;
}
- (BOOL)_initializeStatements:(NSError**)error {
_statements = calloc(kNumStatements, sizeof(sqlite3_stmt*));
if (!(_options & kGCCommitDatabaseOptions_QueryOnly)) {
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "BEGIN IMMEDIATE TRANSACTION", -1, &_statements[kStatement_BeginTransaction], NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "SELECT " kCommitsTableName ".sha1 FROM " kCommitsTableName " JOIN " kTipsTableName " ON " kTipsTableName ".`commit`=" kCommitsTableName "._id_" , -1, &_statements[kStatement_ListTipSHA1s], NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "SELECT _id_ FROM " kCommitsTableName " WHERE sha1=?1", -1, &_statements[kStatement_FindCommitID], NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "SELECT parent FROM " kRelationsTableName " WHERE child=?1", -1, &_statements[kStatement_LookupCommitParentIDs], NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "SELECT _id_ FROM " kUsersTableName " WHERE email=?1 AND name=?2", -1, &_statements[kStatement_FindUserID], NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "INSERT INTO " kTipsTableName " VALUES (NULL, ?1)", -1, &_statements[kStatement_AddTip], NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "INSERT INTO " kCommitsTableName " VALUES (NULL, ?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8)", -1, &_statements[kStatement_AddCommit], NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "INSERT INTO " kUsersTableName " VALUES (NULL, ?1, ?2)", -1, &_statements[kStatement_AddUser], NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "INSERT INTO " kRelationsTableName " VALUES (NULL, ?1, ?2)", -1, &_statements[kStatement_AddRelation], NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "UPDATE " kCommitsTableName " SET retain_count=retain_count+1 WHERE _id_=?1", -1, &_statements[kStatement_RetainCommit], NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "UPDATE " kCommitsTableName " SET retain_count=retain_count-1 WHERE _id_=?1", -1, &_statements[kStatement_ReleaseCommit], NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "DELETE FROM " kTipsTableName " WHERE `commit`=?1", -1, &_statements[kStatement_DeleteTip], NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "DELETE FROM " kCommitsTableName " WHERE _id_=?1 AND retain_count=0", -1, &_statements[kStatement_DeleteOrphanCommit], NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "DELETE FROM " kRelationsTableName " WHERE child=?1 OR parent=?1", -1, &_statements[kStatement_DeleteCommitRelations], NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "INSERT INTO " kFTSUsersTableName "(docid, email, name) VALUES(?1, ?2, ?3)", -1, &_statements[kStatement_AddFTSUser], NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "INSERT INTO " kFTSMessagesTableName "(docid, message) VALUES(?1, ?2)", -1, &_statements[kStatement_AddFTSMessage], NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "INSERT INTO " kFTSDiffsTableName "(docid, added, deleted) VALUES(?1, ?2, ?3)", -1, &_statements[kStatement_AddFTSDiff], NULL);
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "END TRANSACTION", -1, &_statements[kStatement_EndTransaction], NULL);
}
CALL_SQLITE_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, " \
SELECT sha1, time FROM " kFTSMessagesTableName " JOIN " kCommitsTableName " ON " kCommitsTableName ".rowid=" kFTSMessagesTableName ".docid WHERE " kFTSMessagesTableName " MATCH ?1 \
UNION \
SELECT sha1, time FROM " kFTSDiffsTableName " JOIN " kCommitsTableName " ON " kCommitsTableName ".rowid=" kFTSDiffsTableName ".docid WHERE " kFTSDiffsTableName " MATCH ?1 \
UNION \
SELECT sha1, time FROM " kFTSUsersTableName " JOIN " kUsersTableName " ON " kUsersTableName ".rowid=" kFTSUsersTableName ".docid JOIN " kCommitsTableName " ON " kCommitsTableName ".author=" kUsersTableName "._id_ WHERE " kFTSUsersTableName " MATCH ?1 \
UNION \
SELECT sha1, time FROM " kFTSUsersTableName " JOIN " kUsersTableName " ON " kUsersTableName ".rowid=" kFTSUsersTableName ".docid JOIN " kCommitsTableName " ON " kCommitsTableName ".committer=" kUsersTableName "._id_ WHERE " kFTSUsersTableName " MATCH ?1 \
ORDER BY time DESC", -1, &_statements[kStatement_SearchCommits], NULL);
return YES;
}
- (BOOL)_hasTables {
BOOL result = NO;
sqlite3_stmt* statement;
if (sqlite3_prepare_v2(_database, "SELECT 1 FROM sqlite_master", -1, &statement, NULL) == SQLITE_OK) {
if (sqlite3_step(statement) == SQLITE_ROW) {
result = YES;
}
sqlite3_finalize(statement);
}
return result;
}
- (int)_readVersion {
int version = 0;
sqlite3_stmt* statement;
if (sqlite3_prepare_v2(_database, "PRAGMA user_version", -1, &statement, NULL) == SQLITE_OK) {
if (sqlite3_step(statement) == SQLITE_ROW) {
version = sqlite3_column_int(statement, 0);
}
sqlite3_finalize(statement);
}
return version;
}
- (BOOL)_checkReady:(NSError**)error {
sqlite3_stmt* statement;
CALL_LIBGIT2_FUNCTION_RETURN(NO, sqlite3_prepare_v2, _database, "SELECT 1 FROM sqlite_master WHERE type='trigger'", -1, &statement, NULL);
int result = sqlite3_step(statement);
CALL_LIBGIT2_FUNCTION_RETURN(NO, sqlite3_finalize, statement);
if (result == SQLITE_ROW) {
_ready = YES;
} else {
XLOG_DEBUG_CHECK(result == SQLITE_DONE);
}
return YES;
}
- (instancetype)initWithRepository:(GCRepository*)repository databasePath:(NSString*)path options:(GCCommitDatabaseOptions)options error:(NSError**)error {
if ((self = [super init])) {
_repository = repository;
_databasePath = [path copy];
_options = options;
if (![self _initializeDatabase:path error:error]) {
[self release];
return nil;
}
int version = 2 * kSchemaVersion + (_options & kGCCommitDatabaseOptions_IndexDiffs ? 1 : 0);
if ([self _hasTables]) {
NSInteger currentVersion = [self _readVersion];
if (currentVersion == version) {
if (![self _checkReady:error]) {
[self release];
return nil;
}
} else {
if (_options & kGCCommitDatabaseOptions_QueryOnly) {
GC_SET_GENERIC_ERROR(@"Database is query-only");
[self release];
return nil;
}
sqlite3_close(_database);
_database = NULL;
XLOG_WARNING(@"Commit database for \"%@\" has an incompatible version (%li) and must be regenerated", _repository.repositoryPath, currentVersion);
if (![[NSFileManager defaultManager] removeItemAtPath:path error:error] || ![self _initializeDatabase:path error:error] || ![self _initializeSchema:version error:error]) {
[self release];
return nil;
}
}
} else {
if (![self _initializeSchema:version error:error]) {
[self release];
return nil;
}
}
if (![self _initializeStatements:error]) {
[self release];
return nil;
}
}
return self;
}
- (void)dealloc {
if (_statements) {
for (int i = 0; i < kNumStatements; ++i) {
sqlite3_finalize(_statements[i]);
}
free(_statements);
}
sqlite3_close(_database);
[_databasePath release];
[super dealloc];
}
#if DEBUG
static // Ensure function is inlined per C99 specs by leaving "static" out
#endif
inline unsigned int _hash_buffer(const unsigned char *key, size_t length) {
unsigned int h = 0;
const unsigned char* max = key + length;
while (key < max) {
#if 1
h = *key++ + (h << 6) + (h << 16) - h; // SDBM (seems to produces fewer false positives for about the same speed as SAX)
#else
h ^= (h << 5) + (h >> 2) + *key++; // SAX
#endif
}
return h;
}
// TODO: Skip common English words
// TODO: Skip programming keywords
// This uses a simple hash-based cache to reduce the lines to their unique words
// There can be false positives i.e. words repeated more than once in the result, but that's an acceptable speed trade-off considering SQLite FTS will fix this anyway
static void _ExtractUniqueWordsFromLines(NSMutableData* lines, NSMutableData* words) {
GC_LIST_ALLOCATE(list, kWordCacheSize, Word);
unsigned char* cache = calloc(kWordCacheSize / CHAR_BIT, sizeof(char));
Word* wordPtr;
const unsigned char* max = (unsigned char*)lines.bytes + lines.length;
const unsigned char* current = lines.bytes;
const unsigned char* start = NULL;
do {
if ((current == max) || IS_DELIMITER(*current)) {
if (start != NULL) {
size_t length = current - start;
unsigned int hash = _hash_buffer(start, length);
if (length >= kMinWordLength) {
if (!GET_BIT(cache, hash % kWordCacheSize)) {
Word word = {start, length};
GC_LIST_APPEND(list, &word);
SET_BIT(cache, hash % kWordCacheSize);
}
}
start = NULL;
}
} else {
if (start == NULL) {
start = current;
}
}
++current;
} while (current <= max);
char space = ' ';
GC_LIST_FOR_LOOP_POINTER(list, wordPtr) {
[words appendBytes:wordPtr->start length:wordPtr->length];
[words appendBytes:&space length:1];
}
free(cache);
GC_LIST_FREE(list);
}
// We don't use the GCDiff wrappers because we need the best possible performance
// TODO: Consider indexing file names
static BOOL _ProcessDiff(git_repository* repo, git_commit* commit, git_commit* parent, NSMutableData* addedLines, NSMutableData* deletedLines) {
BOOL success = NO;
git_tree* newTree;
int status = git_commit_tree(&newTree, commit);
if (status == GIT_OK) {
git_tree* oldTree = NULL;
if (parent) {
status = git_commit_tree(&oldTree, parent);
}
if (status == GIT_OK) {
git_diff_options diffOptions = GIT_DIFF_OPTIONS_INIT;
diffOptions.ignore_submodules = GIT_SUBMODULE_IGNORE_ALL;
diffOptions.max_size = kMaxFileSizeForTextDiff;
diffOptions.context_lines = 0;
diffOptions.interhunk_lines = 0;
git_diff* diff;
status = git_diff_tree_to_tree(&diff, repo, oldTree, newTree, &diffOptions);
if (status == GIT_OK) {
git_diff_find_options findOptions = GIT_DIFF_FIND_OPTIONS_INIT;
findOptions.flags = GIT_DIFF_FIND_RENAMES; // We need to find renames to avoid generated added/deleted lines when just renaming a file
status = git_diff_find_similar(diff, &findOptions);
if (status == GIT_OK) {
success = YES;
for (size_t i = 0, iMax = git_diff_num_deltas(diff); i < iMax; ++i) {
git_patch* patch;
status = git_patch_from_diff(&patch, diff, i);
if (status == GIT_OK) {
for (size_t j = 0, jMax = git_patch_num_hunks(patch); j < jMax; ++j) {
for (size_t k = 0, kMax = git_patch_num_lines_in_hunk(patch, j); k < kMax; ++k) {
const git_diff_line* line;
if (git_patch_get_line_in_hunk(&line, patch, j, k) == GIT_OK) {
if (line->origin == GIT_DIFF_LINE_ADDITION) {
[addedLines appendBytes:line->content length:line->content_len];
} else if (line->origin == GIT_DIFF_LINE_DELETION) {
[deletedLines appendBytes:line->content length:line->content_len];
}
} else {
XLOG_DEBUG_UNREACHABLE();
success = NO;
}
}
}
git_patch_free(patch);
} else {
LOG_LIBGIT2_ERROR(status);
success = NO;
break;
}
}
} else {
LOG_LIBGIT2_ERROR(status);
}
git_diff_free(diff);
} else {
LOG_LIBGIT2_ERROR(status);
}
git_tree_free(oldTree);
} else {
LOG_LIBGIT2_ERROR(status);
}
git_tree_free(newTree);
} else {
LOG_LIBGIT2_ERROR(status);
}
return success;
}
- (BOOL)_addCommitsForTip:(const git_oid*)tipOID handler:(BOOL (^)())handler error:(NSError**)error {
BOOL success = NO;
GC_LIST_ALLOCATE(row, 16, Item);
GC_LIST_ALLOCATE(newRow, 16, Item);
git_commit* mainParent = NULL;
NSMutableData* addedLines = [[NSMutableData alloc] initWithCapacity:(64 * 1024)];
NSMutableData* deletedLines = [[NSMutableData alloc] initWithCapacity:(64 * 1024)];
NSMutableData* addedWords = [[NSMutableData alloc] initWithCapacity:(32 * 1024)];
NSMutableData* deletedWords = [[NSMutableData alloc] initWithCapacity:(32 * 1024)];
sqlite3_stmt** statements = _statements;
BOOL indexDiffs = _options & kGCCommitDatabaseOptions_IndexDiffs ? YES : NO;
git_commit* commit;
int result;
int status;
Item item;
const Item* itemPtr;
// Check if commit is already in database
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_blob, statements[kStatement_FindCommitID], 1, tipOID, GIT_OID_RAWSZ, SQLITE_STATIC);
result = sqlite3_step(statements[kStatement_FindCommitID]);
if (result == SQLITE_ROW) {
sqlite3_int64 tipID = sqlite3_column_int64(statements[kStatement_FindCommitID], 0);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_FindCommitID]);
// Create tip
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_AddTip], 1, tipID);
result = sqlite3_step(statements[kStatement_AddTip]);
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_AddTip]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 1);
// Retain commit
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_RetainCommit], 1, tipID);
result = sqlite3_step(statements[kStatement_RetainCommit]);
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_RetainCommit]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 1);
success = YES;
goto cleanup;
}
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_FindCommitID]);
// Load tip commit and queue it
status = git_commit_lookup(&commit, _repository.private, tipOID);
if (status == GIT_ENOTFOUND) {
XLOG_WARNING(@"Missing tip commit %s from repository \"%@\"", git_oid_tostr_s(tipOID), _repository.repositoryPath);
success = YES;
goto cleanup;
}
CHECK_LIBGIT2_FUNCTION_CALL(goto cleanup, status, == GIT_OK);
item.commit = commit;
item.childID = 0;
GC_LIST_APPEND(row, &item);
// Create commits for the tip and its ancestors
while (1) {
for (size_t i = 0; i < GC_LIST_COUNT(row); ++i) {
itemPtr = GC_LIST_ITEM_POINTER(row, i);
unsigned int parentCount = git_commit_parentcount(itemPtr->commit);
const git_signature* author = git_commit_author(itemPtr->commit);
const git_signature* committer = git_commit_committer(itemPtr->commit);
// Bind retain count (always 1 as the commit is either retained by the tip or by its parent)
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int, statements[kStatement_AddCommit], 1, 1);
// Bind commit SHA1
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_blob, statements[kStatement_AddCommit], 2, git_commit_id(itemPtr->commit), GIT_OID_RAWSZ, SQLITE_STATIC);
// Bind commit date
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_AddCommit], 3, committer->when.time);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int, statements[kStatement_AddCommit], 4, committer->when.offset);
// Bind commit author
sqlite3_int64 authorID;
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_text, statements[kStatement_FindUserID], 1, author->email, -1, SQLITE_STATIC);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_text, statements[kStatement_FindUserID], 2, author->name, -1, SQLITE_STATIC);
result = sqlite3_step(statements[kStatement_FindUserID]);
if (result == SQLITE_ROW) {
authorID = sqlite3_column_int64(statements[kStatement_FindUserID], 0);
} else {
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
// Create user
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_text, statements[kStatement_AddUser], 1, author->email, -1, SQLITE_STATIC);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_text, statements[kStatement_AddUser], 2, author->name, -1, SQLITE_STATIC);
result = sqlite3_step(statements[kStatement_AddUser]);
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
authorID = sqlite3_last_insert_rowid(_database);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_AddUser]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 1);
// Update users FTS
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_AddFTSUser], 1, authorID);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_text, statements[kStatement_AddFTSUser], 2, author->email, -1, SQLITE_STATIC);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_text, statements[kStatement_AddFTSUser], 3, author->name, -1, SQLITE_STATIC);
result = sqlite3_step(statements[kStatement_AddFTSUser]);
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_AddFTSUser]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 1);
}
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_AddCommit], 5, authorID);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_FindUserID]);
// Bind commit committer
sqlite3_int64 committerID;
if (!strcmp(committer->email, author->email) && ((committer->name == author->name) || (committer->name && author->name && !strcmp(committer->name, author->name)))) {
committerID = authorID; // Fast path for common case
} else {
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_text, statements[kStatement_FindUserID], 1, committer->email, -1, SQLITE_STATIC);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_text, statements[kStatement_FindUserID], 2, committer->name, -1, SQLITE_STATIC);
result = sqlite3_step(statements[kStatement_FindUserID]);
if (result == SQLITE_ROW) {
committerID = sqlite3_column_int64(statements[kStatement_FindUserID], 0);
} else {
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
// Create user
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_text, statements[kStatement_AddUser], 1, committer->email, -1, SQLITE_STATIC);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_text, statements[kStatement_AddUser], 2, committer->name, -1, SQLITE_STATIC);
result = sqlite3_step(statements[kStatement_AddUser]);
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
committerID = sqlite3_last_insert_rowid(_database);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_AddUser]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 1);
// Update users FTS
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_AddFTSUser], 1, committerID);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_text, statements[kStatement_AddFTSUser], 2, committer->email, -1, SQLITE_STATIC);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_text, statements[kStatement_AddFTSUser], 3, committer->name, -1, SQLITE_STATIC);
result = sqlite3_step(statements[kStatement_AddFTSUser]);
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_AddFTSUser]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 1);
}
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_FindUserID]);
}
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_AddCommit], 6, committerID);
// Bind commit parent SHA1s
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wvla"
git_oid parents[parentCount];
#pragma clang diagnostic pop
for (unsigned int j = 0; j < parentCount; ++j) {
git_oid_cpy(&parents[j], git_commit_parent_id(itemPtr->commit, j));
}
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_blob, statements[kStatement_AddCommit], 7, parents, (int)sizeof(parents), SQLITE_STATIC);
// Bind commit message
const char* message = git_commit_message(itemPtr->commit); // This already trims leading newlines
size_t length = strlen(message);
if (length) {
while (message[length - 1] == '\n') { // Trim trailing newlines
--length;
}
}
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_text, statements[kStatement_AddCommit], 8, message, (int)length, SQLITE_STATIC);
// Create commit
sqlite3_int64 commitID;
result = sqlite3_step(statements[kStatement_AddCommit]);
if (result == SQLITE_CONSTRAINT_UNIQUE) { // This can happen when a row contains a commit that was already created while processing an earlier row
XLOG_DEBUG_CHECK(itemPtr->childID);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 0);
sqlite3_reset(statements[kStatement_AddCommit]);
// Commit already exists in database so just fetch its ID...
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_blob, statements[kStatement_FindCommitID], 1, git_commit_id(itemPtr->commit), GIT_OID_RAWSZ, SQLITE_STATIC);
result = sqlite3_step(statements[kStatement_FindCommitID]);
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_ROW);
commitID = sqlite3_column_int64(statements[kStatement_FindCommitID], 0);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_FindCommitID]);
// ...and retain it because of relation we are about to create
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_RetainCommit], 1, commitID);
result = sqlite3_step(statements[kStatement_RetainCommit]);
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_RetainCommit]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 1);
// Don't follow parents later on
parentCount = 0;
} else {
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
commitID = sqlite3_last_insert_rowid(_database);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_AddCommit]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 1);
// Update messages FTS
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_AddFTSMessage], 1, commitID);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_text, statements[kStatement_AddFTSMessage], 2, message, (int)length, SQLITE_STATIC);
result = sqlite3_step(statements[kStatement_AddFTSMessage]);
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_AddFTSMessage]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 1);
// Update diffs FTS
if (indexDiffs) {
if (parentCount) {
status = git_commit_parent(&mainParent, itemPtr->commit, 0);
} else {
status = GIT_OK;
}
addedLines.length = 0;
deletedLines.length = 0;
if ((status == GIT_OK) && _ProcessDiff(_repository.private, itemPtr->commit, mainParent, addedLines, deletedLines)) {
if (addedLines.length || deletedLines.length) {
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_AddFTSDiff], 1, commitID);
addedWords.length = 0;
_ExtractUniqueWordsFromLines(addedLines, addedWords);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_blob, statements[kStatement_AddFTSDiff], 2, addedWords.bytes, (int)addedWords.length, SQLITE_STATIC);
deletedWords.length = 0;
_ExtractUniqueWordsFromLines(deletedLines, deletedWords);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_blob, statements[kStatement_AddFTSDiff], 3, deletedWords.bytes, (int)deletedWords.length, SQLITE_STATIC);
result = sqlite3_step(statements[kStatement_AddFTSDiff]);
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_AddFTSDiff]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 1);
}
} else {
XLOG_WARNING(@"Unable to compute diff for commit %s from repository \"%@\"", git_oid_tostr_s(git_commit_id(itemPtr->commit)), _repository.repositoryPath);
}
}
// Call handler
if (!handler()) {
if (error) {
*error = GCNewError(kGCErrorCode_UserCancelled, @"");
}
goto cleanup;
}
}
// Create relation with child unless currently processing tip commit...
if (itemPtr->childID) {
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_AddRelation], 1, itemPtr->childID);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_AddRelation], 2, commitID);
result = sqlite3_step(statements[kStatement_AddRelation]);
#if __UNIQUE_RELATIONS__
if (result == SQLITE_CONSTRAINT_UNIQUE) { // This can happen for degenerated commits with duplicate parents
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 0);
sqlite3_reset(statements[kStatement_AddRelation]);
// Release commit that was previously retained
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_ReleaseCommit], 1, commitID);
result = sqlite3_step(statements[kStatement_ReleaseCommit]);
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_ReleaseCommit]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 1);
} else
#endif
{
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_AddRelation]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 1);
}
}
// ...in which case create tip instead
else {
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_AddTip], 1, commitID);
result = sqlite3_step(statements[kStatement_AddTip]);
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_AddTip]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 1);
}
// Follow parents unless already in database
for (unsigned int j = 0; j < parentCount; ++j) {
const git_oid* parentOID = git_commit_parent_id(itemPtr->commit, j);
// Check if parent is already in database
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_blob, statements[kStatement_FindCommitID], 1, parentOID, GIT_OID_RAWSZ, SQLITE_STATIC);
result = sqlite3_step(statements[kStatement_FindCommitID]);
if (result == SQLITE_DONE) {
// Load parent commit and queue it
git_commit* parentCommit;
if (indexDiffs && (j == 0)) {
if (mainParent) {
parentCommit = mainParent; // Fast path
mainParent = NULL;
status = GIT_OK;
} else {
parentCommit = NULL; // Required to silence warning
status = GIT_ENOTFOUND;
}
} else {
status = git_commit_lookup(&parentCommit, _repository.private, parentOID);
}
if (status != GIT_ENOTFOUND) {
CHECK_LIBGIT2_FUNCTION_CALL(goto cleanup, status, == GIT_OK);
item.commit = parentCommit;
item.childID = commitID;
GC_LIST_APPEND(newRow, &item);
} else {
XLOG_WARNING(@"Missing commit %s from repository \"%@\"", git_oid_tostr_s(parentOID), _repository.repositoryPath);
}
} else {
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_ROW);
sqlite3_int64 parentID = sqlite3_column_int64(statements[kStatement_FindCommitID], 0);
// Create relation with existing parent
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_AddRelation], 1, commitID);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_AddRelation], 2, parentID);
result = sqlite3_step(statements[kStatement_AddRelation]);
#if __UNIQUE_RELATIONS__
if (result == SQLITE_CONSTRAINT_UNIQUE) { // This can happen for degenerated commits with duplicate parents
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 0);
sqlite3_reset(statements[kStatement_AddRelation]);
} else
#endif
{
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_AddRelation]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 1);
// Retain existing parent
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_RetainCommit], 1, parentID);
result = sqlite3_step(statements[kStatement_RetainCommit]);
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_RetainCommit]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 1);
}
}
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_FindCommitID]);
}
git_commit_free(mainParent);
mainParent = NULL;
}
GC_LIST_FOR_LOOP_POINTER(row, itemPtr) {
git_commit_free(itemPtr->commit);
}
GC_LIST_RESET(row);
// Check if there are no more commits to follow
if (GC_LIST_COUNT(newRow) == 0) {
break;
}
GC_LIST_SWAP(newRow, row);
}
// We're done
success = YES;
cleanup:
[deletedWords release];
[addedWords release];
[deletedLines release];
[addedLines release];
git_commit_free(mainParent);
GC_LIST_FOR_LOOP_POINTER(newRow, itemPtr) {
git_commit_free(itemPtr->commit);
}
GC_LIST_FREE(newRow);
GC_LIST_FOR_LOOP_POINTER(row, itemPtr) {
git_commit_free(itemPtr->commit);
}
GC_LIST_FREE(row);
return success;
}
- (BOOL)_removeCommitsForTip:(const git_oid*)tipOID handler:(BOOL (^)())handler error:(NSError**)error {
BOOL success = NO;
GC_LIST_ALLOCATE(row, 16, sqlite3_int64);
GC_LIST_ALLOCATE(newRow, 16, sqlite3_int64);
sqlite3_stmt** statements = _statements;
sqlite3_int64* int64Ptr;
int result;
// Convert tip commit OID to tip commit ID and queue it
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_blob, statements[kStatement_FindCommitID], 1, tipOID, GIT_OID_RAWSZ, SQLITE_STATIC);
result = sqlite3_step(statements[kStatement_FindCommitID]);
if (result == SQLITE_DONE) {
XLOG_DEBUG_UNREACHABLE();
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_FindCommitID]);
success = YES;
goto cleanup;
}
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_ROW);
sqlite3_int64 tipID = sqlite3_column_int64(statements[kStatement_FindCommitID], 0);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_FindCommitID]);
GC_LIST_APPEND(row, &tipID);
// Delete tip
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_DeleteTip], 1, tipID);
result = sqlite3_step(statements[kStatement_DeleteTip]);
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_DeleteTip]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 1);
// Release commit and all its ancestors
while (1) {
GC_LIST_FOR_LOOP_POINTER(row, int64Ptr) {
sqlite3_int64 commitID = *int64Ptr;
size_t oldCount = GC_LIST_COUNT(newRow);
// Follow and queue parents
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_LookupCommitParentIDs], 1, commitID);
result = sqlite3_step(statements[kStatement_LookupCommitParentIDs]);
while (result == SQLITE_ROW) {
sqlite3_int64 parentID = sqlite3_column_int64(statements[kStatement_LookupCommitParentIDs], 0);
GC_LIST_APPEND(newRow, &parentID);
result = sqlite3_step(statements[kStatement_LookupCommitParentIDs]);
}
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_LookupCommitParentIDs]);
// Release commit
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_ReleaseCommit], 1, commitID);
result = sqlite3_step(statements[kStatement_ReleaseCommit]);
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_ReleaseCommit]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) == 1);
// Attempt to delete commit if retain count is zero
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_DeleteOrphanCommit], 1, commitID);
result = sqlite3_step(statements[kStatement_DeleteOrphanCommit]);
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_DeleteOrphanCommit]);
if (sqlite3_changes(_database) == 0) {
GC_LIST_TRUNCATE(newRow, oldCount); // Dequeue parents if commit is still in use
} else {
// Delete corresponding relations
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_bind_int64, statements[kStatement_DeleteCommitRelations], 1, commitID);
result = sqlite3_step(statements[kStatement_DeleteCommitRelations]);
CHECK_SQLITE_FUNCTION_CALL(goto cleanup, result, == SQLITE_DONE);
CALL_SQLITE_FUNCTION_GOTO(cleanup, sqlite3_reset, statements[kStatement_DeleteCommitRelations]);
XLOG_DEBUG_CHECK(sqlite3_changes(_database) > 0);
// Call handler
if (!handler()) {
if (error) {
*error = GCNewError(kGCErrorCode_UserCancelled, @"");
}
goto cleanup;
}
}
}
if (GC_LIST_COUNT(newRow) == 0) {
break;
}
GC_LIST_SWAP(newRow, row);
GC_LIST_RESET(newRow);
}