Custom 'git all' command in Ruby and 'hg all' extension in Python

[git] configuration and example

C:\Users\Jon\Documents\WebDev>git config --global --list | grep -P "^alias\.[abs]"
alias.all=!ruby c:/tools/gitall.rb
alias.br=branch
alias.st=status -sb


C:\Users\Jon\Documents\WebDev>git all fetch
No '.gitall_ignore' found; processing all '*-git' dirs...
[FETCH] 960-gs-git
[FETCH] cramp-git
[FETCH] jekyll-git
[FETCH] lift-git
[FETCH] mustache-rails3-git
[FETCH] mustache-sinatra-git
[FETCH] nanoc-git
[FETCH] padrino-git
From https://github.com/padrino/padrino-framework
   95df763..8941e4b  master     -> origin/master
[FETCH] quotes-git
[FETCH] rack-git
From https://github.com/rack/rack
   fb0d0d4..0c26ffe  master     -> origin/master
   698ec56..e65368f  rack-1.3   -> origin/rack-1.3
[FETCH] rack-mount-git
[FETCH] rack-test-git
[FETCH] radiant-git
[FETCH] scalatra-git
[FETCH] sdj-git
[FETCH] sinatra-authentication-git
[FETCH] sinatra-contrib-git
From https://github.com/sinatra/sinatra-contrib
   9a31497..35a92b6  master     -> origin/master
[FETCH] sinatra-git
From https://github.com/sinatra/sinatra
   27206ab..a25bff1  1.2.x      -> origin/1.2.x
 * [new tag]         1.2.7      -> 1.2.7
 * [new tag]         v1.2.7     -> v1.2.7
[FETCH] slim-git
[FETCH] toto-git
[FETCH] trinidad-git
[FETCH] warden-git

The following repos were updated:

padrino-git
rack-git
sinatra-contrib-git
sinatra-git

[git] gitall.rb

# Revision: 10/12/2011 9:13:05 AM

# TODO recognize more git commands
# TODO better handling of aliases as not all have my custom aliases :(
# TODO code clean this little experiment
# TODO enable full git subcommand options to be passed to git

root = File.expand_path File.dirname(__FILE__)

def usage_and_exit(msg=USAGE, code=-1)
  STDERR.puts msg
  exit(code)
end

USAGE = <<-EOT
usage: git all GIT_COMMAND

where GIT_COMMAND is one of:
  br     branch
  fetch  fetch
  st     status
EOT

VALID_CMDS = [
  :br,
  :fetch,
  :st,
]

usage_and_exit unless ARGV.length > 0

options = {}
options[:debug] = ARGV.delete('--debug') || ARGV.delete('-d')

cmd = ARGV.shift.downcase.to_sym
usage_and_exit unless VALID_CMDS.include?(cmd)

require 'open3'

begin
  require 'psych'
rescue LoadError
ensure
  require 'yaml'
end

begin
  excludes = YAML.load_file('.gitall_ignore')
rescue ::Exception
  STDERR.puts %q[No '.gitall_ignore' found; processing all '*-git' dirs...]
end

updated = []

Dir.glob('*-git').each do |dir|
  if excludes
    next if excludes.include?(dir)
  end

  Dir.chdir(dir) do
    puts "[#{cmd.upcase}] #{dir}"

    results, status = Open3.capture2e("git #{cmd}", :binmode => true)

    case cmd
    when :st, :br
      puts results
    when :fetch
      #unless results.empty?
      if results =~ /^From/
        updated << dir
        puts results
      end
    end

    print "Exit status: #{status.exitstatus}\n\n" if options[:debug]
  end
end

if updated.length > 0 
  puts <<-EOT

The following repos were updated:

#{updated.join("\n")}
EOT
end

[hg] configuration and example

C:\Users\Jon\Documents\webDev>type %USERPROFILE%\.hgrc
...
[extensions]
all= C:/tools/hgall.py
...


C:\Users\Jon\Documents\WebDev>hg all fetch
[FETCH] cp-hg
pulling from https://bitbucket.org/cherrypy/cherrypy
searching for changes
no changes found

[hg] hgall.py

# hgall.py - execute commands on multiple hg repos
#
# Created: 10/16/2011 8:35:05 PM
# Revision: 10/20/2011 12:04:17 PM
#
# TODO fix inability to pass hg cmd options without needing `--`

"""execute commands on multiple repositories"""

from mercurial import commands, util
from mercurial.dispatch import dispatch, request

import glob, json, os

commands.norepo += ' all'

def hgall(ui, *args, **opts):
    "Execute commands on multiple Mercurial repos"

    if len(args) == 0:
        return

    try:
        with open('.hgall_ignore') as f:
            excludes = json.load(f)
    except Exception:
        print("No '.hgall_ignore' found; processing all '*%s' dirs" % opts['suffix'])

    for d in glob.glob('*%s' % opts['suffix']):
        if 'excludes' in locals():
            if d in excludes:
                continue

        ui.write('[%s] %s\n' % (args[0].upper(), d))
        os.chdir(d)
        dispatch(request(list(args)))
        os.chdir('..')

cmdtable = {
    "all": (hgall,
            [('s', 'suffix', '-hg', 'Mercurial repo identifier suffix'),
            ],
            "[options] CMD [-- CMD_OPTIONS]")
}