Description: Make the build reproducible
Author: Chris Lamb <lamby@debian.org>
Last-Update: 2019-06-20

--- a/rollup.config.js
+++ b/rollup.config.js
@@ -10,7 +10,7 @@
     format: "umd",
     indent: false,
     extend: true,
-    banner: `// ${meta.homepage} v${meta.version} Copyright ${(new Date).getFullYear()} ${meta.author.name}`,
+    banner: `// ${meta.homepage} v${meta.version} Copyright ${(new Date(process.env.SOURCE_DATE_EPOCH ? (process.env.SOURCE_DATE_EPOCH * 1000) : new Date().getTime())).getFullYear()} ${meta.author.name}`,
     globals: Object.assign({}, ...Object.keys(meta.dependencies || {}).filter(key => /^d3-/.test(key)).map(key => ({[key]: "d3"})))
   },
   plugins: []