V3: Yocoto 1561: clean up the workdir

new file mode 100755
index 0000000..b77e8c6
@@ -0,0 +1,150 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2012 Wind River Systems, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+import os
+import sys
+import optparse
+import re
+import commands
+import shutil
+
+versions = {}
+obsolete_dirs = []
+parser = None
+
+def err_quit(msg):
+    print msg
+    parser.print_usage()
+    sys.exit(1)
+
+def parse_version(verstr):
+    elems = verstr.split(':')
+    epoch = elems[0]
+    if len(epoch) == 0:
+        return elems[1]
+    else:
+        return epoch + '_' + elems[1]
+
+def parse_dir(match, pkgabsdir):
+    pkg_name = match.group(1)
+    pkg_version = match.group(2)
+    if pkg_name in versions:
+        if pkg_version != versions[pkg_name]:
+            obsolete_dirs.append(pkgabsdir)
+        return True
+    return False
+
+def main():
+    global parser
+    parser = optparse.OptionParser(
+        usage = """%prog
+
+Remove the obsolete packages' build directories in WORKDIR.
+This script must be ran under BUILDDIR after source file \"oe-init-build-env\".""")
+
+    options, args = parser.parse_args(sys.argv)
+
+    builddir = commands.getoutput('echo $BUILDDIR')
+    if len(builddir) == 0:
+        err_quit("Please source file \"oe-init-build-env\" first.\n")
+
+    if os.getcwd() != builddir:
+        err_quit("Please run %s under: %s\n" % (os.path.basename(args[0]), builddir))
+
+    print 'Updating bitbake caches...'
+    cmd = "bitbake -s"
+    (ret, output) = commands.getstatusoutput(cmd)
+    if ret != 0:
+        print "Execute 'bitbake -s' failed. Can't get packages' versions."
+        return 1
+
+    output = output.split('\n')
+    index = 0
+    while len(output[index]) > 0:
+        index += 1
+    alllines = output[index+1:]
+
+    for line in alllines:
+        # empty again means end of the versions output
+        if len(line) == 0:
+            break
+        line = line.strip()
+        line = re.sub('\s+', ' ', line)
+        elems = line.split(' ')
+        if len(elems) == 2:
+            version = parse_version(elems[1])
+        else:
+            version = parse_version(elems[2])
+        versions[elems[0]] = version
+
+    cmd = "bitbake -e | grep ^TMPDIR"
+    (ret, output) = commands.getstatusoutput(cmd)
+    if ret != 0:
+        print "Execute 'bitbke -e' failed. Can't get TMPDIR."
+        return 1
+
+    tmpdir = output.split('"')[1]
+    workdir = os.path.join(tmpdir, 'work')
+    if not os.path.exists(workdir):
+        print "WORKDIR %s does NOT exist. Quit." % workdir
+        return 1
+
+    for archdir in os.listdir(workdir):
+        archdir = os.path.join(workdir, archdir)
+        if not os.path.isdir(archdir):
+            pass
+
+        for pkgdir in sorted(os.listdir(archdir)):
+            pkgabsdir = os.path.join(archdir, pkgdir)
+            if not os.path.isdir(pkgabsdir):
+                pass
+
+            # parse the package directory names
+            # parse native/nativesdk packages first
+            match = re.match('(.*?-native.*?)-(.*)', pkgdir)
+            if match and parse_dir(match, pkgabsdir):
+                continue
+
+            # parse package names which ends with numbers such as 'glib-2.0'
+            match = re.match('(.*?-[\.\d]+)-(\d.*)', pkgdir)
+            if match and parse_dir(match, pkgabsdir):
+                continue
+
+            # other packages
+            match = re.match('(.*?)-(\d.*)', pkgdir)
+            if match and parse_dir(match, pkgabsdir):
+                continue
+
+    for d in obsolete_dirs:
+        print "Deleleting %s" % d
+        shutil.rmtree(d, True)
+
+    if len(obsolete_dirs):
+        print '\nTotal %d items.' % len(obsolete_dirs)
+    else:
+        print '\nNo obsolete directory found under %s.' % workdir
+
+    return 0
+
+if __name__ == '__main__':
+    try:
+        ret = main()
+    except Exception:
+        ret = 2
+        import traceback
+        traceback.print_exc(3)
+    sys.exit(ret)