From: Chris Lamb <chris@chris-lamb.co.uk>
Date: Sat, 7 Dec 2019 15:41:56 +0000 (+0000)
Subject: Make the build reproducible (#6817)
X-Git-Tag: v3.0.0-alpha~204
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c4483d18648a4de1fff9a03a95bfec416c0f1be4;p=thirdparty%2FChart.js.git

Make the build reproducible (#6817)

Whilst working on the Reproducible Builds effort [0] we noticed that
Chart.js could not be built reproducibly.

This is because it was embedding another build date in a "banner"
comment. This patch uses the value from SOURCE_DATE_EPOCH [1] if
present.

This was originally filed in Debian as #946333 [2].

 [0] https://reproducible-builds.org/
 [1] https://reproducible-builds.org/specs/source-date-epoch/
 [2] https://bugs.debian.org/946333

Signed-off-by: Chris Lamb <lamby@debian.org>
---

diff --git a/rollup.config.js b/rollup.config.js
index e8b593793..3cbfe0b5c 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -12,7 +12,7 @@ const input = 'src/index.js';
 const banner = `/*!
  * Chart.js v${pkg.version}
  * ${pkg.homepage}
- * (c) ${new Date().getFullYear()} Chart.js Contributors
+ * (c) ${(new Date(process.env.SOURCE_DATE_EPOCH ? (process.env.SOURCE_DATE_EPOCH * 1000) : new Date().getTime())).getFullYear()} Chart.js Contributors
  * Released under the MIT License
  */`;