show current branches of git repo under current directory

current-branches.rb

#! /usr/bin/env ruby

# Pull all directory under current directory, if it's on master, has no local changes, can be pulled fast-forward.

def git_repo?
  `git status`.chomp !~ /Not a git repository/
end

def not_changed?
  `git status -s`.chomp.empty?
end

def master?
  # .gitconfig
  # current-branch  = "!sh -c \"git branch | grep '*' | awk '{ print \\$2 }' \""
  `git current-branch`.chomp == 'master'
end

list = Dir['./*'].select {|d| File.directory? d }.map do |d|
  Dir.chdir(d) { git_repo? && [d, `git current-branch`.strip ] }
end.compact

l = list.map(&:first).map(&:length).max + 1

list.each {|dir, branch|
  puts "#{dir.ljust(l)}: #{branch}"
}