From 6e5c7bf308ddcb2be756cb84c6c7119b612e4e28 Mon Sep 17 00:00:00 2001
From: "Haelwenn (lanodan) Monnier" <contact@hacktivis.me>
Date: Sun, 10 Sep 2023 08:22:28 +0200
Subject: [PATCH] Use export-subst gitattribute to allow tarball builds

For example it would do the following:

    let subst = "d3bf557c";
---
 .gitattributes                    |  1 +
 build/webpack.prod.conf.js        | 13 ++++++++++---
 changelog.d/export-subst-hash.fix |  1 +
 3 files changed, 12 insertions(+), 3 deletions(-)
 create mode 100644 .gitattributes
 create mode 100644 changelog.d/export-subst-hash.fix

diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 00000000..c5b9ea10
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+/build/webpack.prod.conf.js export-subst
diff --git a/build/webpack.prod.conf.js b/build/webpack.prod.conf.js
index 7de93721..664290a5 100644
--- a/build/webpack.prod.conf.js
+++ b/build/webpack.prod.conf.js
@@ -11,9 +11,16 @@ var env = process.env.NODE_ENV === 'testing'
     ? require('../config/test.env')
     : config.build.env
 
-let commitHash = require('child_process')
-    .execSync('git rev-parse --short HEAD')
-    .toString();
+let commitHash = (() => {
+  let subst = "$Format:%h$";
+  if(!subst.match(/Format:/)) {
+    return subst;
+  } else {
+    return require('child_process')
+      .execSync('git rev-parse --short HEAD')
+      .toString();
+  }
+})();
 
 var webpackConfig = merge(baseWebpackConfig, {
   mode: 'production',
diff --git a/changelog.d/export-subst-hash.fix b/changelog.d/export-subst-hash.fix
new file mode 100644
index 00000000..fb0d85cb
--- /dev/null
+++ b/changelog.d/export-subst-hash.fix
@@ -0,0 +1 @@
+Use export-subst gitattribute to allow tarball builds