diff options
| -rw-r--r-- | app/models/commit.rb | 11 | ||||
| -rw-r--r-- | lib/gitlab/diff/diff_refs.rb | 22 | ||||
| -rw-r--r-- | lib/gitlab/diff/position.rb | 11 |
3 files changed, 31 insertions, 13 deletions
diff --git a/app/models/commit.rb b/app/models/commit.rb index 2ae8890c1b3..c85b5b93607 100644 --- a/app/models/commit.rb +++ b/app/models/commit.rb @@ -26,7 +26,8 @@ class Commit DIFF_HARD_LIMIT_LINES = 50000 # The SHA can be between 7 and 40 hex characters. - COMMIT_SHA_PATTERN = '\h{7,40}'.freeze + MIN_SHA_LENGTH = 7 + COMMIT_SHA_PATTERN = /\h{#{MIN_SHA_LENGTH},40}/.freeze def banzai_render_context(field) context = { pipeline: :single_line, project: self.project } @@ -53,7 +54,7 @@ class Commit # Truncate sha to 8 characters def truncate_sha(sha) - sha[0..7] + sha[0..MIN_SHA_LENGTH] end def max_diff_options @@ -100,7 +101,7 @@ class Commit def self.reference_pattern @reference_pattern ||= %r{ (?:#{Project.reference_pattern}#{reference_prefix})? - (?<commit>\h{7,40}) + (?<commit>#{COMMIT_SHA_PATTERN}) }x end @@ -216,9 +217,9 @@ class Commit @raw.respond_to?(method, include_private) || super end - # Truncate sha to 8 characters + # Truncate sha to 7 characters def short_id - @raw.short_id(7) + @raw.short_id(MIN_SHA_LENGTH) end def diff_refs diff --git a/lib/gitlab/diff/diff_refs.rb b/lib/gitlab/diff/diff_refs.rb index 371cbe04b9b..1c4c1deb7a9 100644 --- a/lib/gitlab/diff/diff_refs.rb +++ b/lib/gitlab/diff/diff_refs.rb @@ -13,9 +13,9 @@ module Gitlab def ==(other) other.is_a?(self.class) && - base_sha == other.base_sha && - start_sha == other.start_sha && - head_sha == other.head_sha + shas_equal?(base_sha, other.base_sha) && + shas_equal?(start_sha, other.start_sha) && + shas_equal?(head_sha, other.head_sha) end alias_method :eql?, :== @@ -47,6 +47,22 @@ module Gitlab CompareService.new(project, head_sha).execute(project, start_sha, straight: straight) end end + + private + + def shas_equal?(sha1, sha2) + return true if sha1 == sha2 + return false if sha1.nil? || sha2.nil? + return false unless sha1.class == sha2.class + + length = [sha1.length, sha2.length].min + + # If either of the shas is below 7 characters in length, we cannot be sure + # if they actually refer to the same commit because of hash collision. + return false if length < Commit::MIN_SHA_LENGTH + + sha1[0, length] == sha2[0, length] + end end end end diff --git a/lib/gitlab/diff/position.rb b/lib/gitlab/diff/position.rb index f80afb20f0c..b8db3adef0a 100644 --- a/lib/gitlab/diff/position.rb +++ b/lib/gitlab/diff/position.rb @@ -49,12 +49,13 @@ module Gitlab coder['attributes'] = self.to_h end - def key - @key ||= [base_sha, start_sha, head_sha, Digest::SHA1.hexdigest(old_path || ""), Digest::SHA1.hexdigest(new_path || ""), old_line, new_line] - end - def ==(other) - other.is_a?(self.class) && key == other.key + other.is_a?(self.class) && + other.diff_refs == diff_refs && + other.old_path == old_path && + other.new_path == new_path && + other.old_line == old_line && + other.new_line == new_line end def to_h |