summaryrefslogtreecommitdiff
path: root/app/models/repository.rb
blob: a8e826c9cbfea355af759254db5436644f060f82 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
require 'securerandom'

class Repository
  class CommitError < StandardError; end

  # Files to use as a project avatar in case no avatar was uploaded via the web
  # UI.
  AVATAR_FILES = %w{logo.png logo.jpg logo.gif}

  include Gitlab::ShellAdapter

  attr_accessor :path_with_namespace, :project

  def self.clean_old_archives
    repository_downloads_path = Gitlab.config.gitlab.repository_downloads_path

    return unless File.directory?(repository_downloads_path)

    Gitlab::Popen.popen(%W(find #{repository_downloads_path} -not -path #{repository_downloads_path} -mmin +120 -delete))
  end

  def initialize(path_with_namespace, project)
    @path_with_namespace = path_with_namespace
    @project = project
  end

  def raw_repository
    return nil unless path_with_namespace

    @raw_repository ||= Gitlab::Git::Repository.new(path_to_repo)
  end

  def update_autocrlf_option
    raw_repository.autocrlf = :input if raw_repository.autocrlf != :input
  end

  # Return absolute path to repository
  def path_to_repo
    @path_to_repo ||= File.expand_path(
      File.join(Gitlab.config.gitlab_shell.repos_path, path_with_namespace + ".git")
    )
  end

  def exists?
    return @exists unless @exists.nil?

    @exists = cache.fetch(:exists?) do
      begin
        raw_repository && raw_repository.rugged ? true : false
      rescue Gitlab::Git::Repository::NoRepository
        false
      end
    end
  end

  def empty?
    return @empty unless @empty.nil?

    @empty = cache.fetch(:empty?) { raw_repository.empty? }
  end

  #
  # Git repository can contains some hidden refs like:
  #   /refs/notes/*
  #   /refs/git-as-svn/*
  #   /refs/pulls/*
  # This refs by default not visible in project page and not cloned to client side.
  #
  # This method return true if repository contains some content visible in project page.
  #
  def has_visible_content?
    return @has_visible_content unless @has_visible_content.nil?

    @has_visible_content = cache.fetch(:has_visible_content?) do
      branch_count > 0
    end
  end

  def commit(id = 'HEAD')
    return nil unless exists?
    commit = Gitlab::Git::Commit.find(raw_repository, id)
    commit = Commit.new(commit, @project) if commit
    commit
  rescue Rugged::OdbError
    nil
  end

  def commits(ref, path = nil, limit = nil, offset = nil, skip_merges = false)
    options = {
      repo: raw_repository,
      ref: ref,
      path: path,
      limit: limit,
      offset: offset,
      # --follow doesn't play well with --skip. See:
      # https://gitlab.com/gitlab-org/gitlab-ce/issues/3574#note_3040520
      follow: false,
      skip_merges: skip_merges
    }

    commits = Gitlab::Git::Commit.where(options)
    commits = Commit.decorate(commits, @project) if commits.present?
    commits
  end

  def commits_between(from, to)
    commits = Gitlab::Git::Commit.between(raw_repository, from, to)
    commits = Commit.decorate(commits, @project) if commits.present?
    commits
  end

  def find_commits_by_message(query, ref = nil, path = nil, limit = 1000, offset = 0)
    ref ||= root_ref

    # Limited to 1000 commits for now, could be parameterized?
    args = %W(#{Gitlab.config.git.bin_path} log #{ref} --pretty=%H --skip #{offset} --max-count #{limit} --grep=#{query})
    args = args.concat(%W(-- #{path})) if path.present?

    git_log_results = Gitlab::Popen.popen(args, path_to_repo).first.lines.map(&:chomp)
    commits = git_log_results.map { |c| commit(c) }
    commits
  end

  def find_branch(name)
    raw_repository.branches.find { |branch| branch.name == name }
  end

  def find_tag(name)
    raw_repository.tags.find { |tag| tag.name == name }
  end

  def add_branch(user, branch_name, target)
    oldrev = Gitlab::Git::BLANK_SHA
    ref    = Gitlab::Git::BRANCH_REF_PREFIX + branch_name
    target = commit(target).try(:id)

    return false unless target

    GitHooksService.new.execute(user, path_to_repo, oldrev, target, ref) do
      rugged.branches.create(branch_name, target)
    end

    after_create_branch
    find_branch(branch_name)
  end

  def add_tag(tag_name, ref, message = nil)
    before_push_tag

    gitlab_shell.add_tag(path_with_namespace, tag_name, ref, message)
  end

  def rm_branch(user, branch_name)
    before_remove_branch

    branch = find_branch(branch_name)
    oldrev = branch.try(:target)
    newrev = Gitlab::Git::BLANK_SHA
    ref    = Gitlab::Git::BRANCH_REF_PREFIX + branch_name

    GitHooksService.new.execute(user, path_to_repo, oldrev, newrev, ref) do
      rugged.branches.delete(branch_name)
    end

    after_remove_branch
    true
  end

  def rm_tag(tag_name)
    before_remove_tag

    gitlab_shell.rm_tag(path_with_namespace, tag_name)
  end

  def branch_names
    cache.fetch(:branch_names) { branches.map(&:name) }
  end

  def tag_names
    cache.fetch(:tag_names) { raw_repository.tag_names }
  end

  def commit_count
    cache.fetch(:commit_count) do
      begin
        raw_repository.commit_count(self.root_ref)
      rescue
        0
      end
    end
  end

  def branch_count
    @branch_count ||= cache.fetch(:branch_count) { branches.size }
  end

  def tag_count
    @tag_count ||= cache.fetch(:tag_count) { raw_repository.rugged.tags.count }
  end

  # Return repo size in megabytes
  # Cached in redis
  def size
    cache.fetch(:size) { raw_repository.size }
  end

  def diverging_commit_counts(branch)
    root_ref_hash = raw_repository.rev_parse_target(root_ref).oid
    cache.fetch(:"diverging_commit_counts_#{branch.name}") do
      # Rugged seems to throw a `ReferenceError` when given branch_names rather
      # than SHA-1 hashes
      number_commits_behind = raw_repository.
        count_commits_between(branch.target, root_ref_hash)

      number_commits_ahead = raw_repository.
        count_commits_between(root_ref_hash, branch.target)

      { behind: number_commits_behind, ahead: number_commits_ahead }
    end
  end

  def cache_keys
    %i(size branch_names tag_names commit_count
       readme version contribution_guide changelog license)
  end

  def build_cache
    cache_keys.each do |key|
      unless cache.exist?(key)
        send(key)
      end
    end
  end

  def expire_tags_cache
    cache.expire(:tag_names)
    @tags = nil
  end

  def expire_branches_cache
    cache.expire(:branch_names)
    @local_branches = nil
  end

  def expire_cache(branch_name = nil, revision = nil)
    cache_keys.each do |key|
      cache.expire(key)
    end

    expire_branch_cache(branch_name)
    expire_avatar_cache(branch_name, revision)

    # This ensures this particular cache is flushed after the first commit to a
    # new repository.
    expire_emptiness_caches if empty?
  end

  def expire_branch_cache(branch_name = nil)
    # When we push to the root branch we have to flush the cache for all other
    # branches as their statistics are based on the commits relative to the
    # root branch.
    if !branch_name || branch_name == root_ref
      branches.each do |branch|
        cache.expire(:"diverging_commit_counts_#{branch.name}")
      end
    # In case a commit is pushed to a non-root branch we only have to flush the
    # cache for said branch.
    else
      cache.expire(:"diverging_commit_counts_#{branch_name}")
    end
  end

  def expire_root_ref_cache
    cache.expire(:root_ref)
    @root_ref = nil
  end

  # Expires the cache(s) used to determine if a repository is empty or not.
  def expire_emptiness_caches
    cache.expire(:empty?)
    @empty = nil

    expire_has_visible_content_cache
  end

  def expire_has_visible_content_cache
    cache.expire(:has_visible_content?)
    @has_visible_content = nil
  end

  def expire_branch_count_cache
    cache.expire(:branch_count)
    @branch_count = nil
  end

  def expire_tag_count_cache
    cache.expire(:tag_count)
    @tag_count = nil
  end

  def lookup_cache
    @lookup_cache ||= {}
  end

  def expire_branch_names
    cache.expire(:branch_names)
  end

  def expire_avatar_cache(branch_name = nil, revision = nil)
    # Avatars are pulled from the default branch, thus if somebody pushes to a
    # different branch there's no need to expire anything.
    return if branch_name && branch_name != root_ref

    # We don't want to flush the cache if the commit didn't actually make any
    # changes to any of the possible avatar files.
    if revision && commit = self.commit(revision)
      return unless commit.diffs.
        any? { |diff| AVATAR_FILES.include?(diff.new_path) }
    end

    cache.expire(:avatar)

    @avatar = nil
  end

  def expire_exists_cache
    cache.expire(:exists?)
    @exists = nil
  end

  # Runs code after a repository has been created.
  def after_create
    expire_exists_cache
  end

  # Runs code just before a repository is deleted.
  def before_delete
    expire_exists_cache

    expire_cache if exists?

    expire_root_ref_cache
    expire_emptiness_caches
    expire_exists_cache
  end

  # Runs code just before the HEAD of a repository is changed.
  def before_change_head
    # Cached divergent commit counts are based on repository head
    expire_branch_cache
    expire_root_ref_cache
  end

  # Runs code before pushing (= creating or removing) a tag.
  def before_push_tag
    expire_cache
    expire_tags_cache
    expire_tag_count_cache
  end

  # Runs code before removing a tag.
  def before_remove_tag
    expire_tags_cache
    expire_tag_count_cache
  end

  def before_import
    expire_emptiness_caches
    expire_exists_cache
  end

  # Runs code after a repository has been forked/imported.
  def after_import
    expire_emptiness_caches
    expire_exists_cache
  end

  # Runs code after a new commit has been pushed.
  def after_push_commit(branch_name, revision)
    expire_cache(branch_name, revision)
  end

  # Runs code after a new branch has been created.
  def after_create_branch
    expire_branches_cache
    expire_has_visible_content_cache
    expire_branch_count_cache
  end

  # Runs code before removing an existing branch.
  def before_remove_branch
    expire_branches_cache
  end

  # Runs code after an existing branch has been removed.
  def after_remove_branch
    expire_has_visible_content_cache
    expire_branch_count_cache
    expire_branches_cache
  end

  def method_missing(m, *args, &block)
    if m == :lookup && !block_given?
      lookup_cache[m] ||= {}
      lookup_cache[m][args.join(":")] ||= raw_repository.send(m, *args, &block)
    else
      raw_repository.send(m, *args, &block)
    end
  end

  def respond_to_missing?(method, include_private = false)
    raw_repository.respond_to?(method, include_private) || super
  end

  def blob_at(sha, path)
    unless Gitlab::Git.blank_ref?(sha)
      Gitlab::Git::Blob.find(self, sha, path)
    end
  end

  def blob_by_oid(oid)
    Gitlab::Git::Blob.raw(self, oid)
  end

  def readme
    cache.fetch(:readme) { tree(:head).readme }
  end

  def version
    cache.fetch(:version) do
      tree(:head).blobs.find do |file|
        file.name.downcase == 'version'
      end
    end
  end

  def contribution_guide
    cache.fetch(:contribution_guide) do
      tree(:head).blobs.find do |file|
        file.contributing?
      end
    end
  end

  def changelog
    cache.fetch(:changelog) do
      tree(:head).blobs.find do |file|
        file.name =~ /\A(changelog|history)/i
      end
    end
  end

  def license
    cache.fetch(:license) do
      licenses =  tree(:head).blobs.find_all do |file|
                    file.name =~ /\A(copying|license|licence)/i
                  end

      preferences = [
        /\Alicen[sc]e\z/i,        # LICENSE, LICENCE
        /\Alicen[sc]e\./i,        # LICENSE.md, LICENSE.txt
        /\Acopying\z/i,           # COPYING
        /\Acopying\.(?!lesser)/i, # COPYING.txt
        /Acopying.lesser/i        # COPYING.LESSER
      ]

      license = nil
      preferences.each do |r|
        license = licenses.find { |l| l.name =~ r }
        break if license
      end

      license
    end
  end

  def gitlab_ci_yml
    return nil if !exists? || empty?

    @gitlab_ci_yml ||= tree(:head).blobs.find do |file|
      file.name == '.gitlab-ci.yml'
    end
  rescue Rugged::ReferenceError
    # For unknow reason spinach scenario "Scenario: I change project path"
    # lead to "Reference 'HEAD' not found" exception from Repository#empty?
    nil
  end

  def head_commit
    @head_commit ||= commit(self.root_ref)
  end

  def head_tree
    @head_tree ||= Tree.new(self, head_commit.sha, nil)
  end

  def tree(sha = :head, path = nil)
    if sha == :head
      if path.nil?
        return head_tree
      else
        sha = head_commit.sha
      end
    end

    Tree.new(self, sha, path)
  end

  def blob_at_branch(branch_name, path)
    last_commit = commit(branch_name)

    if last_commit
      blob_at(last_commit.sha, path)
    else
      nil
    end
  end

  # Returns url for submodule
  #
  # Ex.
  #   @repository.submodule_url_for('master', 'rack')
  #   # => git@localhost:rack.git
  #
  def submodule_url_for(ref, path)
    if submodules(ref).any?
      submodule = submodules(ref)[path]

      if submodule
        submodule['url']
      end
    end
  end

  def last_commit_for_path(sha, path)
    args = %W(#{Gitlab.config.git.bin_path} rev-list --max-count=1 #{sha} -- #{path})
    sha = Gitlab::Popen.popen(args, path_to_repo).first.strip
    commit(sha)
  end

  def next_patch_branch
    patch_branch_ids = self.branch_names.map do |n|
      result = n.match(/\Apatch-([0-9]+)\z/)
      result[1].to_i if result
    end.compact

    highest_patch_branch_id = patch_branch_ids.max || 0

    "patch-#{highest_patch_branch_id + 1}"
  end

  # Remove archives older than 2 hours
  def branches_sorted_by(value)
    case value
    when 'recently_updated'
      branches.sort do |a, b|
        commit(b.target).committed_date <=> commit(a.target).committed_date
      end
    when 'last_updated'
      branches.sort do |a, b|
        commit(a.target).committed_date <=> commit(b.target).committed_date
      end
    else
      branches
    end
  end

  def contributors
    commits = self.commits(nil, nil, 2000, 0, true)

    commits.group_by(&:author_email).map do |email, commits|
      contributor = Gitlab::Contributor.new
      contributor.email = email

      commits.each do |commit|
        if contributor.name.blank?
          contributor.name = commit.author_name
        end

        contributor.commits += 1
      end

      contributor
    end
  end

  def blob_for_diff(commit, diff)
    blob_at(commit.id, diff.file_path)
  end

  def prev_blob_for_diff(commit, diff)
    if commit.parent_id
      blob_at(commit.parent_id, diff.old_path)
    end
  end

  def refs_contains_sha(ref_type, sha)
    args = %W(#{Gitlab.config.git.bin_path} #{ref_type} --contains #{sha})
    names = Gitlab::Popen.popen(args, path_to_repo).first

    if names.respond_to?(:split)
      names = names.split("\n").map(&:strip)

      names.each do |name|
        name.slice! '* '
      end

      names
    else
      []
    end
  end

  def branch_names_contains(sha)
    refs_contains_sha('branch', sha)
  end

  def tag_names_contains(sha)
    refs_contains_sha('tag', sha)
  end

  def local_branches
    @local_branches ||= rugged.branches.each(:local).map do |branch|
      Gitlab::Git::Branch.new(branch.name, branch.target)
    end
  end

  alias_method :branches, :local_branches

  def tags
    @tags ||= raw_repository.tags
  end

  def root_ref
    @root_ref ||= cache.fetch(:root_ref) { raw_repository.root_ref }
  end

  def commit_dir(user, path, message, branch)
    commit_with_hooks(user, branch) do |ref|
      committer = user_to_committer(user)
      options = {}
      options[:committer] = committer
      options[:author] = committer

      options[:commit] = {
        message: message,
        branch: ref,
      }

      raw_repository.mkdir(path, options)
    end
  end

  def commit_file(user, path, content, message, branch, update)
    commit_with_hooks(user, branch) do |ref|
      committer = user_to_committer(user)
      options = {}
      options[:committer] = committer
      options[:author] = committer
      options[:commit] = {
        message: message,
        branch: ref,
      }

      options[:file] = {
        content: content,
        path: path,
        update: update
      }

      Gitlab::Git::Blob.commit(raw_repository, options)
    end
  end

  def remove_file(user, path, message, branch)
    commit_with_hooks(user, branch) do |ref|
      committer = user_to_committer(user)
      options = {}
      options[:committer] = committer
      options[:author] = committer
      options[:commit] = {
        message: message,
        branch: ref
      }

      options[:file] = {
        path: path
      }

      Gitlab::Git::Blob.remove(raw_repository, options)
    end
  end

  def user_to_committer(user)
    {
      email: user.email,
      name: user.name,
      time: Time.now
    }
  end

  def can_be_merged?(source_sha, target_branch)
    our_commit = rugged.branches[target_branch].target
    their_commit = rugged.lookup(source_sha)

    if our_commit && their_commit
      !rugged.merge_commits(our_commit, their_commit).conflicts?
    else
      false
    end
  end

  def merge(user, source_sha, target_branch, options = {})
    our_commit = rugged.branches[target_branch].target
    their_commit = rugged.lookup(source_sha)

    raise "Invalid merge target" if our_commit.nil?
    raise "Invalid merge source" if their_commit.nil?

    merge_index = rugged.merge_commits(our_commit, their_commit)
    return false if merge_index.conflicts?

    commit_with_hooks(user, target_branch) do |ref|
      actual_options = options.merge(
        parents: [our_commit, their_commit],
        tree: merge_index.write_tree(rugged),
        update_ref: ref
      )

      Rugged::Commit.create(rugged, actual_options)
    end
  end

  def revert(user, commit, base_branch, revert_tree_id = nil)
    source_sha = find_branch(base_branch).target
    revert_tree_id ||= check_revert_content(commit, base_branch)

    return false unless revert_tree_id

    commit_with_hooks(user, base_branch) do |ref|
      committer = user_to_committer(user)
      source_sha = Rugged::Commit.create(rugged,
        message: commit.revert_message,
        author: committer,
        committer: committer,
        tree: revert_tree_id,
        parents: [rugged.lookup(source_sha)],
        update_ref: ref)
    end
  end

  def check_revert_content(commit, base_branch)
    source_sha = find_branch(base_branch).target
    args       = [commit.id, source_sha]
    args       << { mainline: 1 } if commit.merge_commit?

    revert_index = rugged.revert_commit(*args)
    return false if revert_index.conflicts?

    tree_id = revert_index.write_tree(rugged)
    return false unless diff_exists?(source_sha, tree_id)

    tree_id
  end

  def diff_exists?(sha1, sha2)
    rugged.diff(sha1, sha2).size > 0
  end

  def merged_to_root_ref?(branch_name)
    branch_commit = commit(branch_name)
    root_ref_commit = commit(root_ref)

    if branch_commit
      is_ancestor?(branch_commit.id, root_ref_commit.id)
    else
      nil
    end
  end

  def merge_base(first_commit_id, second_commit_id)
    first_commit_id = commit(first_commit_id).try(:id) || first_commit_id
    second_commit_id = commit(second_commit_id).try(:id) || second_commit_id
    rugged.merge_base(first_commit_id, second_commit_id)
  rescue Rugged::ReferenceError
    nil
  end

  def is_ancestor?(ancestor_id, descendant_id)
    merge_base(ancestor_id, descendant_id) == ancestor_id
  end


  def search_files(query, ref)
    offset = 2
    args = %W(#{Gitlab.config.git.bin_path} grep -i -I -n --before-context #{offset} --after-context #{offset} -e #{query} #{ref || root_ref})
    Gitlab::Popen.popen(args, path_to_repo).first.scrub.split(/^--$/)
  end

  def parse_search_result(result)
    ref = nil
    filename = nil
    basename = nil
    startline = 0

    result.each_line.each_with_index do |line, index|
      if line =~ /^.*:.*:\d+:/
        ref, filename, startline = line.split(':')
        startline = startline.to_i - index
        extname = File.extname(filename)
        basename = filename.sub(/#{extname}$/, '')
        break
      end
    end

    data = ""

    result.each_line do |line|
      data << line.sub(ref, '').sub(filename, '').sub(/^:-\d+-/, '').sub(/^::\d+:/, '')
    end

    OpenStruct.new(
      filename: filename,
      basename: basename,
      ref: ref,
      startline: startline,
      data: data
    )
  end

  def fetch_ref(source_path, source_ref, target_ref)
    args = %W(#{Gitlab.config.git.bin_path} fetch --no-tags -f #{source_path} #{source_ref}:#{target_ref})
    Gitlab::Popen.popen(args, path_to_repo)
  end

  def with_tmp_ref(oldrev = nil)
    random_string = SecureRandom.hex
    tmp_ref = "refs/tmp/#{random_string}/head"

    if oldrev && !Gitlab::Git.blank_ref?(oldrev)
      rugged.references.create(tmp_ref, oldrev)
    end

    # Make commit in tmp ref
    yield(tmp_ref)
  ensure
    rugged.references.delete(tmp_ref) rescue nil
  end

  def commit_with_hooks(current_user, branch)
    update_autocrlf_option

    oldrev = Gitlab::Git::BLANK_SHA
    ref = Gitlab::Git::BRANCH_REF_PREFIX + branch
    target_branch = find_branch(branch)
    was_empty = empty?

    if !was_empty && target_branch
      oldrev = target_branch.target
    end

    with_tmp_ref(oldrev) do |tmp_ref|
      # Make commit in tmp ref
      newrev = yield(tmp_ref)

      unless newrev
        raise CommitError.new('Failed to create commit')
      end

      GitHooksService.new.execute(current_user, path_to_repo, oldrev, newrev, ref) do
        if was_empty || !target_branch
          # Create branch
          rugged.references.create(ref, newrev)
        else
          # Update head
          current_head = find_branch(branch).target

          # Make sure target branch was not changed during pre-receive hook
          if current_head == oldrev
            rugged.references.update(ref, newrev)
          else
            raise CommitError.new('Commit was rejected because branch received new push')
          end
        end
      end

      newrev
    end
  end

  def ls_files(ref)
    actual_ref = ref || root_ref
    raw_repository.ls_files(actual_ref)
  end

  def main_language
    unless empty?
      Linguist::Repository.new(rugged, rugged.head.target_id).language
    end
  end

  def avatar
    return nil unless exists?

    @avatar ||= cache.fetch(:avatar) do
      AVATAR_FILES.find do |file|
        blob_at_branch('master', file)
      end
    end
  end

  private

  def cache
    @cache ||= RepositoryCache.new(path_with_namespace)
  end
end