treeeater

• trees are a treat for treeeater
• use it to call git commands in Node
• it is written in CoffeeScript and is heavily using its sweet syntactic sugar
• http://flattr.com - yes, you can give me money :P

principle

• an asynchronous wrapper around git spawning commands
• use git help to find out how to get things done
• specify command line options in an readable and easy way in Coffee Script
• some output is being parsed into objects which actually make some sense!

usage in Coffee Script

• provide a callback to get the whole output

  git.version console.log
  # git version 1.7.5.2

• or listen on item or data events to get it line-, item- or chunkwise

  n = 0
  buffer = git.log()
  buffer.on 'item', (line) -> console.log "#{n += 1}:", line
  
  buffer = git.cat 'package.json', 'HEAD^'
  file = fs.createWriteStream("package.json.bak")
  file.on 'open', -> buffer.pipe file

• put command line arguments as key: value pairs or strings into your call

  Git = require 'treeeater'
  # an option on construction is default for all calls
  git = new Git cwd: 'parrot'
  # ~/parrot$ git log -1 --pretty=raw HEAD^^
  log = git.log 1:null, pretty:'raw', 'HEAD^^'
  log.on 'item', do_something_with_it
  # change current working directory, which must exist
  git.opts.cwd = 'dead'
  # git init --bare -L .
  git.init bare:null, L:'.'

• some functions are not named after git commands and provide some parsed output

  n = 0
  commits = git.commits()
  commits.on 'item', (commit) ->
      if my_email is commit.author.email
          n += 1
  commits.on 'close', ->
      console.log "I've authored #{n} commits!"
  
  git.tree 'HEAD', (trees) ->
      coffee = []
      tree = git.tree_hierachy(trees)
      for stuff in tree
          if stuff.type == 'tree'
              for more_stuff in stuff
                  if '.coffee' in more_stuff.path
                      coffee.push more_stuff
      console.log "#{coffe.length} coffee files in level 1 subfolders"