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Support SOURCE_DATE_EPOCH for reproducible builds (#1035)

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If the `SOURCE_DATE_EPOCH` environment variable is set, use its value
for timestamps in the generated TTF files to make builds reproducible:
https://reproducible-builds.org/docs/source-date-epoch/
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Sergey Vlasov 2021-05-23 01:52:36 +03:00 • committed by GitHub
parent b9baee2c65
commit 6556e4f883
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1 changed files with 6 additions and 1 deletions
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7
font-src/gen/empty-font.js
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@ -3,7 +3,7 @@
const { Ot } = require("ot-builder");
module.exports = function () {
return {
var font = {
head: new Ot.Head.Table(),
hhea: new Ot.MetricHead.Hhea(),
os2: new Ot.Os2.Table(4),
@ -11,4 +11,9 @@ module.exports = function () {
maxp: Ot.Maxp.Table.TrueType(),
name: new Ot.Name.Table()
};
if (process.env.SOURCE_DATE_EPOCH) {
font.head.created = new Date(process.env.SOURCE_DATE_EPOCH * 1000);
font.head.modified = new Date(process.env.SOURCE_DATE_EPOCH * 1000);
}
return font;
};