Show git additions/changes for the git diff from the main branch

show_git_additions.rb

##
#

# https://github.com/anolson/git_diff
require 'git_diff'

patch = `git diff main -U0 --diff-filter=AM`
diff = GitDiff.from_string(patch)

diff.files.each do |diff_file|
  puts "\n#{diff_file.b_path}"

  # Select diff lines that have been added/modified
  diff_lines = diff_file.hunks.map(&:lines).flatten.select { |diff_line| diff_line.content.start_with?("+") }

  diff_lines.each do |diff_line|
    puts "  #{diff_line.line_number.right.to_s.rjust(4)} #{diff_line.content} "
  end
end