#!/usr/bin/python
# License: CC0

"""
Helper script to replace "@since xxx" in Javadoc by the upcoming revision number.

Will retrieve the current revision number from the server. It runs over all
modified and added .java files and replaces xxx in "@since xxx" by the revision
number that is to be expected for the next commit.
"""

import xml.etree.ElementTree as ElementTree
import subprocess

svn_info_local = subprocess.check_output("svn info --xml".split(" "))
rep_url = ElementTree.fromstring(svn_info_local).findtext("./entry/repository/root")
svn_info_server = subprocess.check_output("svn info --xml".split(" ") + [rep_url])
rev = int(ElementTree.fromstring(svn_info_server).find("./entry").get("revision")) + 1
svn_status = subprocess.check_output("svn status --xml".split(" "))
for el in ElementTree.fromstring(svn_status).findall("./target/entry"):
    if  el.find('wc-status').get("item") not in ["added", "modified"]:
        continue
    path = el.get("path")
    if not path.endswith('.java'):
        continue
    with open(path, 'r') as f:
        filedata = f.read()
    filedata2 = filedata.replace("@since xxx", "@since {}".format(rev))
    if filedata != filedata2:
        print("replacing '@since xxx' with '@since {}' in '{}'".format(rev, path))
        with open(path, 'w') as f:
            f.write(filedata2)