commit successive changes to illutrator files

artboard.py

#!env python
"""
artboard.py - (c) 2012 marcos.a.ojeda <[email protected]>

--"Quis leget haec?"

requires:
  graphicsmagick  - brew install graphicsmagick
  ghostscript - brew install ghostscript
  macfsevents - pip install MacFSEvents
"""
import sys
import os
import subprocess
import fsevents
import re
from collections import defaultdict

def popen_results(args):
    proc = subprocess.Popen(args, stdout=subprocess.PIPE)
    return proc.communicate()[0]

def popen_return_code(args, input=None):
    proc = subprocess.Popen(args, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
    proc.communicate(input)
    return proc.returncode


FS_ITEM_CREATED = 0x00000100 #256
FS_ITEM_REMOVED = 0x00000200 #512
FS_ITEM_RENAMED = 0x00000800 #2048
FS_ITEM_MODIFIED = 0x00001000 #4096

# deal with observing the filesystem

def run_observer(observer):
  try:
    observer.start()
    print 'Artboard is now looking for changes in %s' % os.getcwd()
    while True:
      pass
  except KeyboardInterrupt:
    observer.stop()

def whatsnew():
    newfiles = popen_results("hg st -m -a -u -n".split(' ')).strip()
    if newfiles:
        return newfiles.split('\n')
    return []

def extracto(files):
    """groups and bins changes to files"""
    bs = re.compile('(?P<filename>.*?)-(?P<artboard>\d{2}).png')
    coll = defaultdict(list)
    for f in files:
        fn = os.path.split(f)[1]
        m = bs.search(fn)
        if m:
            coll[m.group('filename')].append(int(m.group('artboard')))
    return ['"%s.ai" boards:(%s)' % (f, ','.join([str(ab) for ab in coll[f]])) for f in coll]

# iterate over illustrator files
def renderFiles( illustrations ):
    """feeds files through gm"""
    for ai in illustrations:
        print "+ Rendering %s" % ai
        base = ai.split(".")[0]
        newfile = 'repo/%s-%%02d.png' % base
        cmds = ["gm", "convert", "+adjoin", ai, newfile]
        popen_results(cmds)
    # commit the files
    concise = extracto(whatsnew())
    print '  New/Modified files:'
    print '\n'.join(['  - %s' % x for x in concise])
    addresults = popen_results(["hg", "add", "."])
    commit_msg = popen_results(["hg", "ci", "-m", "; ".join(concise)])

def callback(event, *args, **kwargs):
    """docstring for callback"""
    fname = os.path.split(event.name)[-1]
    if fname.endswith("ai"):
        print '\n%s has changed' % fname
        fileschanged = whatsnew()
        if fileschanged:
            renderFiles(fileschanged)

observer = fsevents.Observer()
stream = fsevents.Stream(callback, os.getcwd(), file_events=True)
observer.schedule(stream)
run_observer(observer)

this is broken at least for me in that the only way i can terminate the script is by killing the window.

also, at some point gm added the +adjoin option (or made it necessary), so it may break with older versions of gm.