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PBGitRevList.m
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PBGitRevList.m
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//
// PBGitRevList.m
// GitX
//
// Created by Pieter de Bie on 17-06-08.
// Copyright 2008 __MyCompanyName__. All rights reserved.
//
#import "PBGitRevList.h"
#import "PBGitRepository.h"
#import "PBGitCommit.h"
#import "PBGitGrapher.h"
#import "PBGitRevSpecifier.h"
@implementation PBGitRevList
@synthesize commits;
- initWithRepository: (id) repo
{
repository = repo;
[repository addObserver:self forKeyPath:@"currentBranch" options:0 context:nil];
return self;
}
- (void) reload
{
[self readCommitsForce: YES];
}
- (void) readCommitsForce: (BOOL) force
{
// We use refparse to get the commit sha that we will parse. That way,
// we can check if the current branch is the same as the previous one
// and in that case we don't have to reload the revision list.
// If no branch is selected, don't do anything
if (![repository currentBranch] || [[repository currentBranch] count] == 0)
return;
NSArray* selectedBranches = [[repository branches] objectsAtIndexes: [repository currentBranch]];
// Apparently, The selected index does not exist.. don't do anything
if ([selectedBranches count] == 0)
return;
PBGitRevSpecifier* newRev = [selectedBranches objectAtIndex:0];
NSString* newSha = nil;
if (!force && newRev && [newRev isSimpleRef]) {
newSha = [repository parseReference:[newRev simpleRef]];
if ([newSha isEqualToString:lastSha])
return;
}
lastSha = newSha;
NSThread * commitThread = [[NSThread alloc] initWithTarget: self selector: @selector(walkRevisionListWithSpecifier:) object:newRev];
[commitThread start];
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object
change:(NSDictionary *)change context:(void *)context
{
if (object == repository)
[self readCommitsForce: NO];
}
struct decorateParameters {
NSMutableArray* revisions;
PBGitRevSpecifier* rev;
};
- (void) walkRevisionListWithSpecifier: (PBGitRevSpecifier*) rev
{
NSMutableArray* newArray = [NSMutableArray array];
NSMutableArray* arguments;
BOOL showSign = [rev hasLeftRight];
if (showSign)
arguments = [NSMutableArray arrayWithObjects:@"log", @"--topo-order", @"--pretty=format:%H\01%an\01%s\01%P\01%at\01%m", nil];
else
arguments = [NSMutableArray arrayWithObjects:@"log", @"--topo-order", @"--pretty=format:%H\01%an\01%s\01%P\01%at", nil];
if (!rev)
[arguments addObject:@"HEAD"];
else
[arguments addObjectsFromArray:[rev parameters]];
NSFileHandle* handle = [repository handleForArguments: arguments];
// We decorate the commits in a separate thread.
NSArray *decorationArguments = [NSArray arrayWithObjects:newArray, rev, nil];
NSThread * decorationThread = [[NSThread alloc] initWithTarget: self selector: @selector(decorateRevisions:) object:decorationArguments];
[decorationThread start];
int fd = [handle fileDescriptor];
FILE* f = fdopen(fd, "r");
int BUFFERSIZE = 2048;
char buffer[BUFFERSIZE];
buffer[BUFFERSIZE - 2] = 0;
char* l;
NSMutableString* currentLine = [NSMutableString string];
while (l = fgets(buffer, BUFFERSIZE, f)) {
NSString *s = [NSString stringWithCString:(const char *)l encoding:NSUTF8StringEncoding];
if ([s length] == 0)
s = [NSString stringWithCString:(const char *)l encoding:NSASCIIStringEncoding];
[currentLine appendString: s];
// If buffer is full, we go for another round
if (buffer[BUFFERSIZE - 2] != 0) {
//NSLog(@"Line too long!");
buffer[BUFFERSIZE - 2] = 0;
continue;
}
// If we are here, we currentLine is a full line.
NSArray* components = [currentLine componentsSeparatedByString:@"\01"];
if ([components count] < 5) {
NSLog(@"Can't split string: %@", currentLine);
continue;
}
PBGitCommit* newCommit = [[PBGitCommit alloc] initWithRepository: repository andSha: [components objectAtIndex:0]];
NSArray* parents = [[components objectAtIndex:3] componentsSeparatedByString:@" "];
newCommit.parents = parents;
newCommit.subject = [components objectAtIndex:2];
newCommit.author = [components objectAtIndex:1];
newCommit.date = [NSDate dateWithTimeIntervalSince1970:[[components objectAtIndex:4] intValue]];
if (showSign)
newCommit.sign = [[components objectAtIndex:5] characterAtIndex:0];
@synchronized(newArray) {
[newArray addObject: newCommit];
}
currentLine = [NSMutableString string];
}
[decorationThread cancel];
[NSThread exit];
}
- (void) decorateRevisions:(NSArray *)params
{
NSMutableArray* revisions = [params objectAtIndex:0];
PBGitRevSpecifier* rev = [params objectAtIndex:1];
NSDictionary* refs = [repository refs];
BOOL decorateCommits = ![rev hasPathLimiter];
NSDate* start = [NSDate date];
NSMutableArray* allRevisions = [NSMutableArray arrayWithCapacity:1000];
int num = 0;
PBGitGrapher* g = [[PBGitGrapher alloc] initWithRepository: repository];
while (!([[NSThread currentThread] isCancelled] && [revisions count] == 0)) {
if ([revisions count] == 0)
usleep(5000);
NSArray* currentRevisions;
@synchronized(revisions) {
currentRevisions = [revisions copy];
[revisions removeAllObjects];
}
for (PBGitCommit* commit in currentRevisions) {
num++;
if (decorateCommits)
[g decorateCommit: commit];
if (refs && [refs objectForKey:commit.sha])
commit.refs = [refs objectForKey:commit.sha];
[allRevisions addObject: commit];
if (num % 1000 == 0 || num == 10)
[self performSelectorOnMainThread:@selector(setCommits:) withObject:allRevisions waitUntilDone:NO];
}
}
[self performSelectorOnMainThread:@selector(setCommits:) withObject:allRevisions waitUntilDone:YES];
NSTimeInterval duration = [[NSDate date] timeIntervalSinceDate:start];
NSLog(@"Loaded %i commits in %f seconds", num, duration);
[NSThread exit];
}
@end