#!/usr/bin/python2.7

# 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., 675 Mass Ave, Cambridge, MA 02139, USA.
#
# Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.


# Create a dictionary (timestamps) mapping paths of python files in the modules
# directory to their timestamps.  If a file is modified, its timestamp is the
# filesystem timestamp.  If it's unchanged, its timestamp is the timestamp of
# the last changeset which modified it.

from __future__ import print_function
import os
import time
import mercurial.cmdutil as cmdutil
import mercurial.match as matchmod
from mercurial.localrepo import localrepository
from mercurial.ui import ui

myui = ui()
repo = localrepository(myui, cmdutil.findrepo(os.getcwd()))

# Match only python files in src/modules.
matchfn = matchmod.match(repo.root, os.getcwd(), patterns=["re:src/modules/.*\.py$"])

# Dummy prep function.
def prep(ctx, fns):
        pass

# Get the set of matching files in the working directory parent.
manifest = set(
    f
    for f in repo["."]
    if f.startswith("src/modules/") and f.endswith(".py")
)

# Find out which files have changed.
status = repo.status(match=matchfn)

timestamps = {}

# Handle the modified files first: get their timestamps from the filesystem.
# Remove the filenames from "manifest" so that we don't look for their changeset
# timestamps in the next loop.
for f in status[0] + status[1]:
        if f in manifest:
                timestamps[f] = \
                    os.stat(os.path.join(repo.root, f)).st_mtime
                manifest.remove(f)

# Now walk backwards through the changesets from the working directory parent
# (making sure we don't look at changesets that aren't ancestors), and for each
# file that still needs a timestamp, grab it from the changeset and make sure we
# don't look at it again.
revs = ['reverse(ancestors(.))']
for ctx in cmdutil.walkchangerevs(repo, matchfn, {'rev': revs}, prep):
        for f in ctx.files():
                if f in manifest:
                        timestamps[f] = ctx.date()[0]
                        manifest.remove(f)

for name, stamp in timestamps.iteritems():
        print(stamp, name)

# Get the timestamp of the workspace.  If it's unmodified, then use the
# timestamp of the parent of the working directory, and the latest timestamp of
# the modified and added files if not.  (We would do removed, but we don't know
# when they were removed.)
s = repo.status()
modadd = s[0] + s[1]
if any(modadd):
        print(max((
            os.stat(os.path.join(repo.root, f)).st_mtime
            for f in modadd
        )), ".")
else:
        print(repo["."].date()[0], ".")