Revert to using pycocci

This reverts commit 3756f63528b044d6487bac046ad2972bc21583a5
and commit 709e720caa66816f32c6adc6050549fa40b9cf52 since
using built-in concurrency caused problems with --cocci-grep,
and not using that makes things slower.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 174 insertions, 0 deletions

diff --git a/devel/pycocci b/devel/pycocci
new file mode 100755
index 00000000..4aa1d363
--- /dev/null
+++ b/devel/pycocci
@@ -0,0 +1,174 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2014 Luis R. Rodriguez  <mcgrof@suse.com>
+# Copyright (c) 2013 Johannes Berg <johannes@sipsolutions.net>
+#
+# This file is released under the GPLv2.
+#
+# Python wrapper for Coccinelle for multithreaded support,
+# designed to be used for working on a git tree, and with sensible
+# defaults, specifically for kernel developers.
+
+from multiprocessing import Process, cpu_count, Queue
+import argparse, subprocess, os, sys
+import tempfile, shutil
+
+# simple tempdir wrapper object for 'with' statement
+#
+# Usage:
+# with tempdir.tempdir() as tmpdir:
+#     os.chdir(tmpdir)
+#     do something
+#
+class tempdir(object):
+    def __init__(self, suffix='', prefix='', dir=None, nodelete=False):
+        self.suffix = ''
+        self.prefix = ''
+        self.dir = dir
+        self.nodelete = nodelete
+
+    def __enter__(self):
+        self._name = tempfile.mkdtemp(suffix=self.suffix,
+                                      prefix=self.prefix,
+                                      dir=self.dir)
+        return self._name
+
+    def __exit__(self, type, value, traceback):
+        if self.nodelete:
+            print('not deleting directory %s!' % self._name)
+        else:
+            shutil.rmtree(self._name)
+
+class CoccinelleError(Exception):
+    pass
+
+class ExecutionErrorThread(CoccinelleError):
+    def __init__(self, errcode, fn, cocci_file, threads, t, logwrite, print_name):
+        self.error_code = errcode
+        logwrite("Failed to apply changes from %s\n" % print_name)
+
+        logwrite("Specific log output from change that failed using %s\n" % print_name)
+        tf = open(fn, 'r')
+        for line in tf.read():
+            logwrite(line)
+        tf.close()
+
+        logwrite("Full log using %s\n" % print_name)
+        for num in range(threads):
+            fn = os.path.join(t, '.tmp_spatch_worker.' + str(num))
+            if (not os.path.isfile(fn)):
+                continue
+            tf = open(fn, 'r')
+            for line in tf.read():
+                logwrite(line)
+            tf.close()
+            os.unlink(fn)
+
+def spatch(cocci_file, outdir,
+           max_threads, thread_id, temp_dir, ret_q, extra_args=[]):
+    cmd = ['spatch',
+            '--sp-file', cocci_file,
+            '--in-place',
+            '--recursive-includes',
+            '--relax-include-path',
+            '--use-coccigrep',
+            '--timeout', '120',
+            '--dir', outdir ]
+
+    if (max_threads > 1):
+        cmd.extend(['-max', str(max_threads), '-index', str(thread_id)])
+
+    cmd.extend(extra_args)
+
+    fn = os.path.join(temp_dir, '.tmp_spatch_worker.' + str(thread_id))
+    outfile = open(fn, 'w')
+    logwrite("%s\n" % " ".join(cmd))
+
+    sprocess = subprocess.Popen(cmd,
+                               stdout=outfile, stderr=subprocess.STDOUT,
+                               close_fds=True, universal_newlines=True)
+    sprocess.wait()
+    outfile.close()
+    ret_q.put((sprocess.returncode, fn))
+
+def threaded_spatch(cocci_file, outdir, logwrite, num_jobs,
+                    print_name, extra_args=[]):
+    num_cpus = cpu_count()
+    if num_jobs:
+        threads = int(num_jobs)
+    else:
+        threads = num_cpus
+    jobs = list()
+    output = ""
+    ret_q = Queue()
+    with tempdir() as t:
+        for num in range(threads):
+            p = Process(target=spatch, args=(cocci_file, outdir,
+                                             threads, num, t, ret_q,
+                                             extra_args))
+            jobs.append(p)
+        for p in jobs:
+            p.start()
+
+        for num in range(threads):
+            ret, fn = ret_q.get()
+            if ret != 0:
+                raise ExecutionErrorThread(ret, fn, cocci_file, threads, t,
+                                           logwrite, print_name)
+        for job in jobs:
+            p.join()
+
+        for num in range(threads):
+            fn = os.path.join(t, '.tmp_spatch_worker.' + str(num))
+            tf = open(fn, 'r')
+            output = output + tf.read()
+            tf.close()
+            os.unlink(fn)
+        return output
+
+def logwrite(msg):
+    sys.stdout.write(msg)
+    sys.stdout.flush()
+
+def _main():
+    parser = argparse.ArgumentParser(description='Multithreaded Python wrapper for Coccinelle ' +
+                                     'with sensible defaults, targetted specifically ' +
+                                     'for git development environments')
+    parser.add_argument('cocci_file', metavar='<Coccinelle SmPL rules file>', type=str,
+                        help='This is the Coccinelle file you want to use')
+    parser.add_argument('target_dir', metavar='<target directory>', type=str,
+                        help='Target source directory to modify')
+    parser.add_argument('-p', '--profile-cocci', const=True, default=False, action="store_const",
+                        help='Enable profile, this will pass --profile  to Coccinelle.')
+    parser.add_argument('-j', '--jobs', metavar='<jobs>', type=str, default=None,
+                        help='Only use the cocci file passed for Coccinelle, don\'t do anything else, ' +
+                        'also creates a git repo on the target directory for easy inspection ' +
+                        'of changes done by Coccinelle.')
+    parser.add_argument('-v', '--verbose', const=True, default=False, action="store_const",
+                        help='Enable output from Coccinelle')
+    args = parser.parse_args()
+
+    if not os.path.isfile(args.cocci_file):
+        return -2
+
+    extra_spatch_args = []
+    if args.profile_cocci:
+        extra_spatch_args.append('--profile')
+    jobs = 0
+    if args.jobs > 0:
+        jobs = args.jobs
+
+    output = threaded_spatch(args.cocci_file,
+                             args.target_dir,
+                             logwrite,
+                             jobs,
+                             os.path.basename(args.cocci_file),
+                             extra_args=extra_spatch_args)
+    if args.verbose:
+        logwrite(output)
+    return 0
+
+if __name__ == '__main__':
+    ret = _main()
+    if ret:
+        sys.exit(ret)