#!/usr/bin/env python

# commiturl.py
# gsutter@zer0.org

_version_id = "$Id: commiturl.py,v 1.3 2003/08/17 06:22:34 gsutter Exp $"

import os, sys
import string
import re
import getopt
import fileinput


def usage(progname):
  print ("%s adds URLs to FreeBSD commit messages." % progname)
  print ("Usage: %s [--debug] [<messagefile>]" % progname)


def checkrepo(line):
  matchrepo = r"\s\sFreeBSD\s([a-z]+)\srepository"
  repo = re.match(matchrepo, line)
  if repo:
    cvsrepo = repo.expand(r"\1")
    if sys.debug == 1:
      print ("DEBUG: cvsrepo: %s" % cvsrepo)
    return(cvsrepo)


def checkcommit(line, cvsrepo):
  matchnew = "\s+[\d.]+\s+\+\d+\s+\-\d+\s+([-A-Za-z]+)/(.*)\s+\((dead|new)\)"
  matchdiff = "\s+([\d.]+)\.(\d+)\s+\+\d+\s+\-\d+\s+([-A-Za-z]+)/(.*)"
  matchpr = "\s+PR\:[^\d]+(\d+)"

  pr = re.match(matchpr, line)
  if pr:
    prinfo = pr.expand(r"\1")
    if sys.debug == 1:
      print ("DEBUG: prinfo: %s" % prinfo)
    prurl = r"http://www.freebsd.org/cgi/query-pr.cgi?pr=" + prinfo
    return(prurl)

  new = re.match(matchnew, line)
  if new:
    (cvstree, cvsinfo) = new.expand(r"\1"), new.expand(r"\2")
    if sys.debug == 1:
      print ("DEBUG: cvstree (new): %s" % cvstree)
      print ("DEBUG: cvsinfo (new): %s" % cvsinfo)
    if cvstree == "CVSROOT":
      cvstree = "CVSROOT-%s" % cvsrepo
    cvsurl = r"http://cvsweb.freebsd.org/" + cvstree + r"/" + cvsinfo
    if sys.debug == 1:
      print ("DEBUG: cvsurl: %s" % cvsurl)
    return(cvsurl)

  diff = re.match(matchdiff, line)  
  if diff:
    (diffmajor, diffminor, cvstree, cvsinfo) = diff.expand(r"\1"), \
      diff.expand(r"\2"), diff.expand(r"\3"), diff.expand(r"\4")
    if sys.debug == 1:
      print ("DEBUG: diffmajor: %s" % diffmajor)
      print ("DEBUG: diffminor: %s" % diffminor)
      print ("DEBUG: cvstree (diff): %s" % cvstree)
      print ("DEBUG: cvsinfo (diff): %s" % cvsinfo)
    if cvstree == "CVSROOT":
      cvstree = "CVSROOT-%s" % cvsrepo
    cvsurl = r"http://cvsweb.freebsd.org/" + cvstree + r"/" + cvsinfo + \
      r".diff?&r1=" + str(diffmajor) + r"." + str((int(diffminor) - 1)) + \
      r"&r2=" + str(diffmajor) + r"." + str(diffminor) + r"&f=h"
    if sys.debug == 1:
      print ("DEBUG: cvsurl: %s" % cvsurl)
    return(cvsurl)

  return()


def main(argv, stdout, environ):
  progname = string.split(argv[0], "/")[-1]
  options, args = getopt.getopt(argv[1:], "dh", ["debug", "help"])

  # default is non-debug mode
  sys.debug = 0

  for (field, value) in options:
    if field == "--debug" or field == "-d":
      sys.debug = 1
    if field == "--help" or field== "-h":
      usage(progname)
      sys.exit(-1)
      
  if len(args) > 1:
    usage(progname)
    print "Exiting: can take 0 or 1 arguments."
    sys.exit(-1)

  # initialize with fake repo name, since we know the real repo will
  # be identified before it is needed in a URL.
  cvsrepo = "foo"
  urllist = []

  for line in fileinput.input(args):
    repo = checkrepo(line)
    if repo:
      if sys.debug == 1:
        print ("DEBUG: repo: %s" % repo)
      cvsrepo = repo

    url = checkcommit(line, cvsrepo)
    if url:
      if sys.debug == 1:
        print ("DEBUG: url: %s" % url)
      urllist.append(url)
    
    print ("%s" % line),

  for url in urllist:
    print ("%s" % url)


if __name__ == "__main__":
  main(sys.argv, sys.stdout, os.environ)