PBGitRevList.mm

   1 //
   2 //  PBGitRevList.m
   3 //  GitX
   4 //
   5 //  Created by Pieter de Bie on 17-06-08.
   6 //  Copyright 2008 __MyCompanyName__. All rights reserved.
   7 //
   8
   9 #import "PBGitRevList.h"
  10 #import "PBGitRepository.h"
  11 #import "PBGitCommit.h"
  12 #import "PBGitGrapher.h"
  13 #import "PBGitRevSpecifier.h"
  14
  15 #include "git/oid.h"
  16 #include <ext/stdio_filebuf.h>
  17 #include <iostream>
  18 #include <string>
  19
  20 using namespace std;
  21
  22 @implementation PBGitRevList
  23
  24 @synthesize commits;
  25 - initWithRepository: (id) repo
  26 {
  27         repository = repo;
  28         [repository addObserver:self forKeyPath:@"currentBranch" options:0 context:nil];
  29
  30         return self;
  31 }
  32
  33 - (void) reload
  34 {
  35         [self readCommitsForce: YES];
  36 }
  37
  38 - (void) readCommitsForce: (BOOL) force
  39 {
  40         // We use refparse to get the commit sha that we will parse. That way,
  41         // we can check if the current branch is the same as the previous one
  42         // and in that case we don't have to reload the revision list.
  43
  44         // If no branch is selected, don't do anything
  45         if (![repository currentBranch])
  46                 return;
  47
  48         PBGitRevSpecifier* newRev = [repository currentBranch];
  49         NSString* newSha = nil;
  50
  51         if (!force && newRev && [newRev isSimpleRef]) {
  52                 newSha = [repository parseReference:[newRev simpleRef]];
  53                 if ([newSha isEqualToString:lastSha])
  54                         return;
  55         }
  56         lastSha = newSha;
  57
  58         NSThread * commitThread = [[NSThread alloc] initWithTarget: self selector: @selector(walkRevisionListWithSpecifier:) object:newRev];
  59         [commitThread start];
  60 }
  61
  62 - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object
  63         change:(NSDictionary *)change context:(void *)context
  64 {
  65         if (object == repository)
  66                 [self readCommitsForce: NO];
  67 }
  68
  69 - (void) walkRevisionListWithSpecifier: (PBGitRevSpecifier*) rev
  70 {
  71         NSDate *start = [NSDate date];
  72         NSMutableArray* revisions = [NSMutableArray array];
  73         PBGitGrapher* g = [[PBGitGrapher alloc] initWithRepository: repository];
  74
  75         NSMutableArray* arguments;
  76         BOOL showSign = [rev hasLeftRight];
  77
  78         if (showSign)
  79                 arguments = [NSMutableArray arrayWithObjects:@"log", @"-z", @"--early-output", @"--topo-order", @"--pretty=format:%H%x00%an%x00%s%x00%P%x00%at%x00%m", nil];
  80         else
  81                 arguments = [NSMutableArray arrayWithObjects:@"log", @"-z", @"--early-output", @"--topo-order", @"--pretty=format:%H%x00%an%x00%s%x00%P%x00%at", nil];
  82
  83         if (!rev)
  84                 [arguments addObject:@"HEAD"];
  85         else
  86                 [arguments addObjectsFromArray:[rev parameters]];
  87
  88         if ([rev hasPathLimiter])
  89                 [arguments insertObject:@"--children" atIndex:1];
  90
  91         NSTask *task = [PBEasyPipe taskForCommand:[PBGitBinary path] withArgs:arguments inDir:[repository fileURL].path];
  92         [task launch];
  93         NSFileHandle* handle = [task.standardOutput fileHandleForReading];
  94
  95         int fd = [handle fileDescriptor];
  96         __gnu_cxx::stdio_filebuf<char> buf(fd, std::ios::in);
  97         std::istream stream(&buf);
  98
  99         int num = 0;
 100         while (true) {
 101                 string sha;
 102                 if (!getline(stream, sha, '\0'))
 103                         break;
 104
 105                 // We reached the end of some temporary output. Show what we have
 106                 // until now, and then start again. The sha of the next thing is still
 107                 // in this buffer. So, we use a substring of current input.
 108                 if (sha[1] == 'i') // Matches 'Final output'
 109                 {
 110                         num = 0;
 111                         [self performSelectorOnMainThread:@selector(setCommits:) withObject:revisions waitUntilDone:NO];
 112                         g = [[PBGitGrapher alloc] initWithRepository: repository];
 113                         revisions = [NSMutableArray array];
 114
 115                         sha = sha.substr(sha.length() - 40, 40);
 116                 }
 117
 118                 // From now on, 1.2 seconds
 119                 git_oid oid;
 120                 git_oid_mkstr(&oid, sha.c_str());
 121                 PBGitCommit* newCommit = [[PBGitCommit alloc] initWithRepository:repository andSha:oid];
 122
 123                 string author;
 124                 getline(stream, author, '\0');
 125
 126                 string subject;
 127                 getline(stream, subject, '\0');
 128
 129                 string parentString;
 130                 getline(stream, parentString, '\0');
 131                 if (parentString.size() != 0)
 132                 {
 133                         if (((parentString.size() + 1) % 41) != 0) {
 134                                 NSLog(@"invalid parents: %i", parentString.size());
 135                                 continue;
 136                         }
 137                         int nParents = (parentString.size() + 1) / 41;
 138                         git_oid *parents = (git_oid *)malloc(sizeof(git_oid) * nParents);
 139                         int parentIndex;
 140                         for (parentIndex = 0; parentIndex < nParents; ++parentIndex)
 141                                 git_oid_mkstr(parents + parentIndex, parentString.substr(parentIndex * 41, 40).c_str());
 142
 143                         newCommit.parentShas = parents;
 144                         newCommit.nParents = nParents;
 145                 }
 146
 147                 int time;
 148                 stream >> time;
 149                 char c;
 150                 stream >> c;
 151
 152                 if (c != '\0')
 153                         cout << "Error" << endl;
 154
 155                 [newCommit setSubject:[NSString stringWithUTF8String:subject.c_str()]];
 156                 [newCommit setAuthor:[NSString stringWithUTF8String:author.c_str()]];
 157                 [newCommit setTimestamp:time];
 158
 159                 if (showSign)
 160                 {
 161                         stream >> c;
 162                         if (c != '>' && c != '<' && c != '^' && c != '-')
 163                                 NSLog(@"Error loading commits: sign not correct");
 164                         [newCommit setSign: c];
 165                         stream >> c;
 166                         if (c != '\0' && !stream.eof())
 167                                 NSLog(@"Error: unexpected char (expected '0', was: %c)", c);
 168                 }
 169
 170                 [revisions addObject: newCommit];
 171                 [g decorateCommit: newCommit];
 172
 173                 if (++num % 1000 == 0)
 174                         [self performSelectorOnMainThread:@selector(setCommits:) withObject:revisions waitUntilDone:NO];
 175         }
 176
 177         NSTimeInterval duration = [[NSDate date] timeIntervalSinceDate:start];
 178         NSLog(@"Loaded %i commits in %f seconds", num, duration);
 179         // Make sure the commits are stored before exiting.
 180         [self performSelectorOnMainThread:@selector(setCommits:) withObject:revisions waitUntilDone:YES];
 181         [task waitUntilExit];
 182 }
 183
 184 @end