#!/usr/bin/env python
-import optparse, shlex, subprocess, sys
+import itertools
+import optparse
+import os
+import shlex
+import subprocess
+import sys
+import time
-def parseArgs():
- parser = optparse.OptionParser(usage="%prog batchfile1 [batchfile2] ...")
- opts, args = parser.parse_args(sys.argv[1:])
- return args
-def run(args):
- subprocess.Popen(args).wait()
+def run(running_jobs, cmd):
+ p = subprocess.Popen(cmd, stdin=file(os.devnull, 'r'))
+ running_jobs.append(p)
+
+def wait_for_completion(max_jobs, running_jobs):
+ while len(running_jobs) >= max_jobs:
+ time.sleep(1)
+ for job in running_jobs:
+ if job.poll() is not None:
+ running_jobs.remove(job)
+ job.wait()
+
+def parse_file(fd):
+ def count_indent(s):
+ level = 0
+ for ch in s:
+ if ch == "\t":
+ level += 1
+ else:
+ break
+ return level
-def batchProcess(fd):
- opts = [[], []]
for line in fd:
- args = shlex.split(line)
- if line.startswith("\t\t"):
- run(opts[0] + opts[1] + args)
- elif line.startswith("\t"):
- opts[1] = args
- else:
- opts[0] = args
+ if not line.strip():
+ continue # Ignore blank lines
+ level = count_indent(line)
+ line = line[level:] # Slice off the indentation
+ yield level, line
+ yield 0, None
+
+def batch_process(opts, lines):
+ running_jobs = []
+ cmd = []
+
+ for level, line in lines:
+ old_level = len(cmd) - 1
+ if level <= old_level:
+ run(running_jobs, itertools.chain(*cmd))
+ wait_for_completion(opts.jobs, running_jobs)
+
+ # Delete all options that belong to groups that are indented more than
+ # this one
+ cmd = cmd[:level]
+ assert len(cmd) == level
+
+ if line:
+ cmd.append(shlex.split(line))
+
+ # Wait for remaining jobs to finish
+ wait_for_completion(1, running_jobs)
+
+def parse_args():
+ parser = optparse.OptionParser(usage="%prog batchfile1 [batchfile2] ...")
+ parser.add_option("-j", "--jobs",
+ action="store", dest="jobs", default=1, type="int",
+ help="The number of concurrent jobs to run")
+ opts, args = parser.parse_args(sys.argv[1:])
+ opts.running_jobs = []
+ return opts, args
def main():
- args = parseArgs()
+ opts, args = parse_args()
for name in args:
- batchProcess(open(name))
+ batch_process(opts, parse_file(open(name)))
if __name__ == "__main__":
main()