84 lines
3.3 KiB
Diff
84 lines
3.3 KiB
Diff
From 2f935030ddb834426da1180b768e6b1e71d0824a Mon Sep 17 00:00:00 2001
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From: Sergei Trofimovich <slyich@gmail.com>
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Date: Sat, 9 Oct 2021 10:17:05 +0100
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Subject: [PATCH] terminus-font: bin/otb1cli.py: add support for
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SOURCE_DATE_EPOCH
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NixOS (and a few other distributions) strive for bit-reproducible
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builds. terminus-font-4.49.1 fails reproducibility test due to
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timestamp embedding into .otb files. diffoscope says that two
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consecutive builds differ at file creation timestamp:
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$ diffoscope '...-terminus-font-4.49.1' '...-terminus-font-4.49.1.check'
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- ...-terminus-font-4.49.1/share/fonts/terminus/ter-u12b.otb
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+ ...-terminus-font-4.49.1.check/share/fonts/terminus/ter-u12b.otb
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showttf {}
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@@ -1,32 +1,32 @@
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version=1, numtables=12, searchRange=128 entrySel=3 rangeshift=64
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File Checksum =b1b0afba (should be 0xb1b0afba), diff=0
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EBDT checksum=5263c696 actual=5263c696 diff=0 offset=204 len=23056
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EBLC checksum=350f1222 actual=350f1222 diff=0 offset=23260 len=84
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OS/2 checksum=8b4939dd actual=8b4939dd diff=0 offset=23344 len=96
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cmap checksum=da4e56f3 actual=da4e56f3 diff=0 offset=23440 len=1220
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glyf checksum=00000000 actual=00000000 diff=0 offset=24660 len=0
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-head checksum=1cb1374e actual=9db28c18 diff=8103bb56 offset=24660 len=54
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+head checksum=1cb528c7 actual=9dae9a9f diff=811bb258 offset=24660 len=54
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hhea checksum=055706a2 actual=055706a2 diff=0 offset=24716 len=36
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hmtx checksum=98000000 actual=98000000 diff=0 offset=24752 len=5424
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loca checksum=00000000 actual=00000000 diff=0 offset=30176 len=2714
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maxp checksum=058e0003 actual=058e0003 diff=0 offset=32892 len=32
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name checksum=208d345e actual=208d345e diff=0 offset=32924 len=448
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post checksum=ffd80056 actual=ffd80056 diff=0 offset=33372 len=32
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HEAD table (at 24660)
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Version=1
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fontRevision=1
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- checksumAdj=810154ca
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+ checksumAdj=80f971d8
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magicNumber=5f0f3cf5 (0x5f0f3cf5, diff=0)
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flags=20b baseline_at_0 lsb_at_0 ppem_to_int
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unitsPerEm=1024
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create[0]=0
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- create[1]=dd831dec
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- File created: Wed Oct 6 09:33:32 2021
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+ create[1]=dd870f65
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+ File created: Sat Oct 9 09:20:37 2021
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The change uses SOURCE_DATE_EPOCH environment variable to override
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on-disk timestamps:
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https://reproducible-builds.org/docs/source-date-epoch/
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---
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bin/otb1cli.py | 9 +++++++--
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1 file changed, 7 insertions(+), 2 deletions(-)
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diff --git a/bin/otb1cli.py b/bin/otb1cli.py
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index 92ab07b..847b570 100644
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--- a/bin/otb1cli.py
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+++ b/bin/otb1cli.py
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@@ -17,6 +17,7 @@
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#
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from datetime import datetime, timezone
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+import os
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import fnutil
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import fncli
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@@ -81,8 +82,12 @@ def main_program(nonopt, parsed):
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try:
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stat = ifs.fstat()
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if stat:
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- parsed.created = datetime.fromtimestamp(stat.st_ctime, timezone.utc)
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- parsed.modified = datetime.fromtimestamp(stat.st_mtime, timezone.utc)
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+ # Allow deterministic builds when SOURCE_DATE_EPOCH is set:
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+ # https://reproducible-builds.org/docs/source-date-epoch/
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+ ct = int(os.environ.get('SOURCE_DATE_EPOCH', stat.st_ctime))
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+ mt = int(os.environ.get('SOURCE_DATE_EPOCH', stat.st_mtime))
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+ parsed.created = datetime.fromtimestamp(ct, timezone.utc)
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+ parsed.modified = datetime.fromtimestamp(mt, timezone.utc)
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except Exception as ex:
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fnutil.warning(ifs.location(), str(ex))
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--
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2.33.0
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