ggit/src/get-one-line-log.js

var la = require('lazy-ass')
var is = require('check-more-types')
var exec = require('./exec')
var debug = require('debug')('ggit')

var parsers = require('./parse-git-log')
la(is.fn(parsers.parseOneLineLog), 'missing single line parser', parsers)
la(is.fn(parsers.parseCommitLog), 'missing full log parser', parsers)

// returns a promise
function getLog (opts) {
  opts = opts || {}

  var cmd = opts.full ? 'git log --pretty=full' : 'git log --pretty=oneline'
  var logParser = opts.full ? parsers.parseCommitLog : parsers.parseOneLineLog

  if (opts.n > 0) {
    cmd += ' -n ' + opts.n
  }
  if (opts.remote && opts.branch) {
    cmd += ' ' + opts.remote + '/' + opts.branch + '..' + opts.branch
  } else if (opts.from) {
    cmd += ' ' + opts.from + '..'
  }
  if (opts.firstParent) {
    cmd += ' --first-parent ' + opts.firstParent
  }
  debug('using log cmd "%s"', cmd)

  return exec(cmd).then(logParser)
}

module.exports = getLog

if (!module.parent) {
  getLog({ n: 5 }).then(console.log, console.error)
}