class GITRepo

# File lib/vcs-ann/git.rb, line 2
def initialize(topdir)
  @topdir = topdir
end

# File lib/vcs-ann/git.rb, line 74
def format_commit(list)
  rev = list[0]
  rev
  log_out, log_status = Open3.capture2({'LC_ALL'=>'C'},
     'git', '-C', @topdir.to_s, 'log', '-1', '--parents', rev)
  log_out.force_encoding('locale').scrub!
  if !log_status.success?
    raise "git log failed."
  end

  if /^commit ([0-9a-f]+)(.*)\n/ !~ log_out
    raise "git log doesn't produce 'commit' line."
  end
  commit_rev = $1
  parent_revs = $2.strip.split(/\s+/)

  result = '<pre>'
  log_out.each_line {|line|
    result << "#{h line.chomp}\n"
  }
  result << '</pre>'

  parent_revs.each {|parent_rev|
    diff_out, diff_status = Open3.capture2({'LC_ALL'=>'C'},
       'git', '-C', @topdir.to_s, 'diff', parent_rev, commit_rev)
    diff_out.force_encoding('locale').scrub!
    if !diff_status.success?
      raise "git diff failed."
    end

    rev1 = parent_rev
    rev2 = commit_rev
    filename1 = filename2 = '?'
    result << '<pre>'
    scan_udiff(diff_out) {|tag, *rest|
      case tag
      when :filename1
        line, filename1 = rest
        filename1.sub!(%r{\Aa/}, '')
        result << " "
        result << (h line.chomp.expand_tab) << "\n"
      when :filename2
        line, filename2 = rest
        filename2.sub!(%r{\Ab/}, '')
        result << " "
        result << (h line.chomp.expand_tab) << "\n"
      when :hunk_header
        line, ln_cur1, ln_num1, ln_cur2, ln_num2 = rest
        result << " "
        result << (h line.chomp.expand_tab) << "\n"
      when :del
        line, content_line, ln_cur1 = rest
        content_line = content_line.chomp.expand_tab
        rev1_url = "/file/#{rev1}/#{filename1}\##{ln_cur1}"
        result << %{<a name="#{h(u(rev1.to_s+"/"+filename1+":"+ln_cur1.to_s))}"></a>}
        result << %{<a href="#{h rev1_url}"> -</a>}
        result << (h content_line) << "\n"
      when :add
        line, content_line, ln_cur2 = rest
        content_line = content_line.chomp.expand_tab
        rev2_url = "/file/#{rev2}/#{filename2}\##{ln_cur2}"
        result << %{<a name="#{h(u(rev2.to_s+"/"+filename2+":"+ln_cur2.to_s))}"></a>}
        result << %{<a href="#{h rev2_url}"> +</a>}
        result << (h content_line) << "\n"
      when :com
        line, content_line, ln_cur1, ln_cur2 = rest
        content_line = content_line.chomp.expand_tab
        rev1_url = "/file/#{rev1}/#{filename1}\##{ln_cur1}"
        rev2_url = "/file/#{rev2}/#{filename2}\##{ln_cur2}"
        result << %{<a name="#{h(u(rev1.to_s+"/"+filename1+":"+ln_cur1.to_s))}"></a>}
        result << %{<a name="#{h(u(rev2.to_s+"/"+filename2+":"+ln_cur2.to_s))}"></a>}
        result << %{<a href="#{h rev1_url}"> </a>}
        result << %{<a href="#{h rev2_url}"> </a>}
        result << (h content_line) << "\n"
      when :other
        line, = rest
        result << " "
        result << (h line.chomp.expand_tab) << "\n"
      else
        raise "unexpected udiff line tag"
      end
    }
    result << '</pre>'

  }

  result
end

# File lib/vcs-ann/git.rb, line 39
def format_file(list)
  rev = list[0]
  relpath = list[1..-1].join('/')

  result = '<pre>'

  data = []
  author_name_width = 0
  git_blame_each(@topdir.to_s, relpath, rev) {|rev, original_file_line_number, final_file_line_number, numlines, header, content_line|
    author_time = Time.at(header['author-time'].to_i).strftime("%Y-%m-%d")
    author_name = header['author']
    content_line = content_line.chomp.expand_tab
    author_name_width = author_name.length if author_name_width < author_name.length
    data << [rev, author_time, author_name, content_line, header['filename'], original_file_line_number]
  }

  prev_rev = nil
  ln = 1
  data.each {|rev, author_time, author_name, content_line, filename, original_file_line_number|
    formatted_author_time = prev_rev == rev ? ' ' * 10 : author_time
    formatted_author_name = "%-#{author_name_width}s" % author_name
    commit_url = "/commit/#{rev}\##{u(rev+"/"+filename.to_s+":"+original_file_line_number.to_s)}"
    result << %{<a name="#{h ln.to_s}"></a>}
    result << %{<a href="#{h commit_url}">#{h formatted_author_time}</a> }
    result << %{#{h formatted_author_name} }
    result << %{#{h content_line}\n}
    prev_rev = rev
    ln += 1
  }

  result << '</pre>'

  result
end

# File lib/vcs-ann/git.rb, line 6
def git_blame_each(topdir, relpath, rev)
  out, status = Open3.capture2('git', '-C', topdir, 'blame', '--porcelain', rev, '--', relpath)
  out.force_encoding('locale').scrub!
  if !status.success?
    raise "git blame failed"
  end

  header_hash = {}
  prev_header = {}
  block = []
  out.each_line {|line|
    line.force_encoding('locale').scrub!
    if /\A\t/ !~ line
      block << line
    else
      content_line = line.sub(/\A\t/, '')
      rev, original_file_line_number, final_file_line_number, numlines = block.shift.split(/\s+/)
      if !block.empty?
        header = {}
        block.each {|header_line|
          if / / =~ header_line.chomp
            header[$`] = $'
          end
        }
        header_hash[rev] = header
      end
      header = header_hash[rev]
      yield rev, original_file_line_number, final_file_line_number, numlines, header, content_line
      block = []
    end
  }
end