#!/usr/bin/env python

# This script builds a swig-x.y.z distribution.
# Usage: mkdist.py version branch, where version should be x.y.z and branch is normally 'master'

import sys
import string
import os
import subprocess

def failed():
  print "mkdist.py failed to complete"
  sys.exit(2)


try:
   version = sys.argv[1]
   dirname = "swig-" + version
   branch = sys.argv[2]
except:
   print "Usage: mkdist.py version branch, where version should be x.y.z and branch is normally 'master'"
   sys.exit(1)

if sys.version_info[0:2] < (2, 7):
   print "Error: Python 2.7 is required"
   sys.exit(3)


# Check name matches normal unix conventions
if string.lower(dirname) != dirname:
  print "directory name ("+dirname+") should be in lowercase"
  sys.exit(3)

# If directory and tarball exist, remove it
print "Removing ", dirname
os.system("rm -rf "+dirname)

print "Removing "+dirname+".tar if exists"
os.system("rm -f "+dirname+".tar.gz")

print "Removing "+dirname+".tar.gz if exists"
os.system("rm -f "+dirname+".tar")

# Grab the code from git

print "Checking git repository is in sync with remote repository"
os.system("git remote update origin") == 0 or failed()
command = ["git", "status", "--porcelain", "-uno"]
out = subprocess.check_output(command)
if out.strip() != "":
  print "Local git repository has modifications"
  print " ".join(command)
  print out
  sys.exit(3)

command = ["git", "log", "--oneline", branch + "..origin/" + branch]
out = subprocess.check_output(command)
if out.strip() != "":
  print "Remote repository has additional modifications to local repository"
  print " ".join(command)
  print out
  sys.exit(3)

command = ["git", "log", "--oneline", "origin/" + branch + ".." + branch]
out = subprocess.check_output(command)
if out.strip() != "":
  print "Local repository has modifications not pushed to the remote repository"
  print "These should be pushed and checked that they pass Continuous Integration testing before continuing"
  print " ".join(command)
  print out
  sys.exit(3)

print "Tagging release"
tag = "'rel-" + version + "'"
os.system("git tag -a -m " + tag + " " + tag) == 0 or failed()

outdir = os.path.basename(os.getcwd()) + "/" + dirname + "/"
print "Grabbing tagged release git repository using 'git archive' into " + outdir
os.system("(cd .. && git archive --prefix=" + outdir + " " + tag + " . | tar -xf -)") == 0 or failed()

# Go build the system

print "Building system"
os.system("cd "+dirname+" && ./autogen.sh") == 0 or failed()
os.system("cd "+dirname+"/Source/CParse && bison -y -d parser.y && mv y.tab.c parser.c && mv y.tab.h parser.h") == 0 or failed()
os.system("cd "+dirname+" && make -f Makefile.in libfiles srcdir=./") == 0 or failed()

# Remove autoconf files
os.system("find "+dirname+" -name autom4te.cache -exec rm -rf {} \\;")

# Build documentation
print "Building html documentation"
os.system("cd "+dirname+"/Doc/Manual && make all clean-baks") == 0 or failed()

# Build the tar-ball
os.system("tar -cf "+dirname+".tar "+dirname) == 0 or failed()
os.system("gzip "+dirname+".tar") == 0 or failed()

print "Finished building "+dirname+".tar.gz"