Keep your local git branches clean! This is a script I use to loop through all my local branches, then delete any branches that have already landed in upstream. It will notice if it landed as a merge commit or a rebase. It will list out what's merged and not for any branches it keeps, so you can tell what you should revisit and what you should g…

git-pit

#!/usr/bin/env ruby

require "colorize"

class Branch
  attr_reader :name, :base_branch
  
  def initialize(name, base)
    @name = name
    @base_branch = base || %x{git log -1 --format="%h" @{u}}.chomp
  end
  
  def to_s
    [
      can_pit? ? "[PIT] " : "",
      name,
      "\n",
      "-"*80,
      "\n",
      commits,
      "\n",
      "-"*80,
    ].flatten.join
  end
  
  def commits_to_s
    return '' if commits.empty?
    
    "#     ".blue + commits.join("\n#     ".blue)
  end
  
  def commits
    @commits ||= %x{git cherry -v #{base_branch} #{name}}.chomp.split("\n").reject(&:empty?).map {|l| l.start_with?("+") ? l.green : l }
  end
  
  def can_pit?
    @can_pit ||= commits.all? {|c| c.start_with? '-'}
  end
  
  def self.all_names
    %x{git branch}.split - ["*"]
  end
  
  def self.find(base: nil, names: (ARGV.length > 0 ? ARGV : Branch.all_names))
    names.map {|n| Branch.new(n, base)}
  end
  
  def self.current
    @current ||= (%x{git branch}.split("\n").grep(/[*]/) || ['']).first[2..-1]
  end
end

dry_run = ARGV[0] == '--dry-run'
ARGV.shift if dry_run
base_branch = (ARGV.shift; ARGV.shift) if ARGV[0] == '--branch'

all = Branch.find(base: base_branch)
puts "# PITTING #{"#"*70}".blue.bold
puts "# (dry run only; will not delete branches)".blue if dry_run
all.select(&:can_pit?).each do |b|
  puts(*["git br -D #{b.name}", b.commits_to_s].reject(&:empty?))
  if b.name == Branch.current
    puts "# (can't delete; it's the current branch)".blue
  else
    %x{git br -D #{b.name}} unless dry_run
  end
  puts
end
puts "# KEEPING #{"#"*70}".blue.bold
all.reject(&:can_pit?).each {|b| puts "# keeping ".blue + b.name.blue.bold + "; green commits have not merged", b.commits_to_s, ""}

Sample output: