Author: Bernhard M. Wiedemann <bwiedemann suse de>

Date: 2019-07-22

Allow to override build date with SOURCE_DATE_EPOCH

in order to make builds reproducible.

See https://reproducible-builds.org/ for why this is good

and https://reproducible-builds.org/specs/source-date-epoch/

for the definition of this variable.

diff --git a/python/mozbuild/mozbuild/action/langpack_manifest.py b/python/mozbuild/mozbuild/action/langpack_manifest.py

--- a/python/mozbuild/mozbuild/action/langpack_manifest.py

+++ b/python/mozbuild/mozbuild/action/langpack_manifest.py

 import argparse

 import datetime

 import io

 import json

 import logging

 import os

 import sys

+import time

 import fluent.syntax.ast as FTL

 import mozpack.path as mozpath

 import mozversioncontrol

 import requests

 from fluent.syntax.parser import FluentParser

 from mozpack.chrome.manifest import Manifest, ManifestLocale, parse_manifest

 #    ts == "20170914215617"

 ###

 def get_timestamp_for_locale(path):

     dt = None

     if os.path.isdir(os.path.join(path, ".hg")):

         dt = get_dt_from_hg(path)

     if dt is None:

-        dt = datetime.datetime.utcnow()

+        dt = datetime.datetime.utcfromtimestamp(int(os.environ.get('SOURCE_DATE_EPOCH', time.time())))

     dt = dt.replace(microsecond=0)

     return dt.strftime("%Y%m%d%H%M%S")

 ###

 # Parses an FTL file into a key-value pair object.

 # Does not support attributes, terms, variables, functions or selectors;