batch_export_alembic.py

#========================================
#    author: Changlong.Zang
#      mail: zclongpop123@163.com
#      time: Wed Jun 15 15:11:51 2022
#========================================
import os
import glob
from datetime import datetime
import maya.cmds as mc
import maya.mel as mel
#--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
EXPORT_GROUPS = ('MODEL', )

EXPORT_ARGS   = '-stripNamespaces -uvWrite -writeUVSets -worldSpace -writeVisibility -dataFormat ogawa'

PRE_FRAME_OFFSET  = 5

POST_FRAME_OFFSET = 5

def export_alembic(cache_dir, log):
    '''
    '''
    #-
    if not mc.pluginInfo('AbcExport.mll', q=True, loaded=True):
        try:
            mc.loadPlugin('AbcExport.mll', quiet=True)
        except:
            return False

    start_frame = int(mc.playbackOptions(q=True, min=True) - PRE_FRAME_OFFSET)
    end_frame   = int(mc.playbackOptions(q=True, max=True) + POST_FRAME_OFFSET)
    export_cmds = 'AbcExport'

    for ref in mc.file(q=True, r=True):
        ns = mc.file(ref, q=True, ns=True)
        export_objects = ['{0}:{1}'.format(ns, geo) for geo in EXPORT_GROUPS]
        export_objects = [geo for geo in export_objects if mc.objExists(geo)]
        if not export_objects:
            continue

        cache_file = os.path.join(cache_dir, '{0}.abc'.format(ns)).replace('\\', '/')
        export_cmds += ' -j "-frameRange {0} {1} {2} -root {3} -file {4}"'.format(start_frame,
                                                                                  end_frame, 
                                                                                  EXPORT_ARGS, 
                                                                                  ' -root '.join(export_objects), 
                                                                                  cache_file)
        with open(log, 'w') as f:
            f.write(export_cmds)

    mel.eval(export_cmds)



def main(pattrn):
    '''
    '''
    shot_files = dict()
    for f in glob.glob(pattrn):
        shot_files.setdefault(os.path.dirname(f), list()).append(f)

    for files in shot_files.values():
        scene = sorted(files)[-1]
        log   = '{0}.{1}.log'.format(scene, datetime.now().strftime('%Y-%m-%d'))
        if os.path.isfile(log):
            continue

        with open(log, 'w') as f:
            f.write(datetime.now().strftime('%Y-%m-%d %H:%M:%S'))
            f.write('\r\n')

        mc.file(scene, o=True, f=True, pmt=False)
        export_alembic('D:/test', log)
        mc.file(new=True, f=True)


if __name__ == '__main__':
    main('D:/*.m[ab]')