Module: Covet::VCS::Git

Defined in:
lib/covet/vcs/git.rb

Class Method Summary collapse

Class Method Details

.changes_since(revision = :last_commit) ⇒ Object

Find lines in git-indexed files that were changed (added/deleted/modified) in the codebase since ‘revision`.

Raises:

  • Rugged::Error, Rugged::InvalidError, TypeError



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# File 'lib/covet/vcs/git.rb', line 11

def self.changes_since(revision = :last_commit)
  repo = Rugged::Repository.new(find_git_repo_path!) # raises if can't find git repo
  lines_to_run = Set.new
  diff = case revision.to_s
  when 'last_commit', 'HEAD'
    repo.index.diff
  else
    # raises Rugged::Error or TypeError if `revision` is invalid Git object id
    # (tag name or sha1, etc.)
    commit = Rugged::Commit.new(repo, revision)
    repo.index.diff(commit, {}) # NOTE: for some reason, this call doesn't work properly if the second argument isn't given. Bug in rugged?
  end
  diff.each_patch { |patch|
    file = patch.delta.old_file[:path] # NOTE: old file is the index's version

    patch.each_hunk { |hunk|
      hunk.each_line { |line|
        case line.line_origin
        when :addition
          lines_to_run << [file, line.new_lineno]
        when :deletion
          lines_to_run << [file, line.old_lineno]
        when :context
          lines_to_run << [file, line.new_lineno]
        end
      }
    }
  }
  lines_to_run
end

.find_git_repo_path! ⇒ Object

find git repository path at or below ‘Dir.pwd`



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# File 'lib/covet/vcs/git.rb', line 43

def self.find_git_repo_path!
  dir = orig_dir = Dir.pwd
  found = Dir.exist?('.git') && dir
  while !found && dir && Dir.exist?(dir)
    old_dir = Dir.pwd
    Dir.chdir('..')
    dir = Dir.pwd
    return if old_dir == dir # at root directory
    if dir && Dir.exist?('.git')
      found = dir
    end
  end
  found
ensure
  Dir.chdir(orig_dir) if Dir.pwd != orig_dir
end