git-cms-showtags

#!/bin/bash

""":"
python_cmd="python"
python3 -V >/dev/null 2>&1 && python_cmd="python3"
exec ${python_cmd} $0 ${1+"$@"}
"""

from optparse import OptionParser
from commands import getstatusoutput
from os import environ
from os.path import join, exists
from sys import exit

def format(s, **kwds):
  return s % kwds

if __name__ == "__main__":
  parser = OptionParser()
  opts, args = parser.parse_args()
  if not "CMSSW_VERSION" in environ:
    parser.error("You do not have CMSSW environment setup. Please do cmsenv.")
  if not "CMSSW_BASE" in environ:
    parser.error("You need to be in a CMSSW workarea for this. Create one with scram project CMSSW_X_Y_Z.")
  if 'CMSSW_GIT_HASH' in environ:
    cmssw_tag = environ['CMSSW_GIT_HASH']
  else:
    cmssw_tag = environ['CMSSW_VERSION']
  # If no git area is found. We are in a vanilla area.
  if not exists(join(environ["CMSSW_BASE"], "src/.git")):
    parser.error("You do not have any code checked out WRT the release")

  cmd = "cd $CMSSW_BASE/src ; git ls-tree --abbrev -d -r %(tag)s"
  error, out = getstatusoutput(format(cmd, tag="HEAD"))
  if error:
    parser.error("Error while getting tags for the current working area")
  lines = [x.replace("\t", " ") for x in out.split("\n") if x.count("/") == 1]
  table = [x.split(" ") for x in lines if x]
  baseTags = dict([(x[3], x[2]) for x in table])

  error, out = getstatusoutput(format(cmd, tag = cmssw_tag))
  if error:
    parser.error("Error while getting tags for this CMSSW release, %s" % cmssw_tag)
  lines = [x.replace("\t", " ") for x in out.split("\n") if x.count("/") == 1]
  table = [x.split(" ") for x in lines if x]
  newTags = dict([(x[3], x[2]) for x in table])
  
  minPkg = max([len(x) for x in baseTags])
  minTag = max([len(x) for x in baseTags.itervalues()])

  for (k,v) in sorted(baseTags.iteritems()):
    if not k in newTags:
      print (format("%(package)s\t%(old)s\t%(new)s",
                   package=k.ljust(minPkg, " "),
                   old=v.ljust(minTag, " "),
                   new="REMOVED"))
      continue
    if newTags[k] == v:
      continue
    print (format("%(package)s\t%(old)s\t%(new)s",
                 package=k.ljust(minPkg, " "),
                 old=v.ljust(minTag, " "),
                 new=newTags[k]))