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Support SOURCE_DATE_EPOCH for reproducible builds #909

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Support SOURCE_DATE_EPOCH for reproducible builds #909

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8 changes: 6 additions & 2 deletions misc/tools/postprocess-designspace.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@
from multiprocessing import Pool
from fontTools.designspaceLib import DesignSpaceDocument
from ufo2ft.filters import loadFilters
from datetime import datetime
from datetime import datetime, timezone

sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), 'tools')))
from common import getGitHash, getVersion
Expand All @@ -15,7 +15,11 @@
def update_version(ufo):
version = getVersion()
buildtag, buildtagErrs = getGitHash()
now = datetime.utcnow()
sourceDateEpoch = os.environ.get("SOURCE_DATE_EPOCH")
if sourceDateEpoch is not None:
now = datetime.fromtimestamp(int(sourceDateEpoch), timezone.utc)
else:
now = datetime.utcnow()
if buildtag == "" or len(buildtagErrs) > 0:
buildtag = "src"
print("warning: getGitHash() failed: %r" % buildtagErrs, file=sys.stderr)
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