cleanup-workdir: add a script to clean up WORKDIR

[Yocto 1561]
Add script cleanup-workdir to clean up WORKDIR. It checks every
package build directories under WORKDIR then parse the directory
name to get package name and version. If the version is not the
package prefer version then delete the directory.

(From OE-Core rev: 5eecfa7e504970a9ffde95e568ed7f8e7d6288b9)

Signed-off-by: Kang Kai <kai.kang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/cleanup-workdir

@@ -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)