From 3fe296294d00af43a148cb6ce83193805fd9ec56 Mon Sep 17 00:00:00 2001
From: Jakob Odersky <jakob@odersky.com>
Date: Tue, 11 Dec 2018 18:58:55 -0800
Subject: Initial commit

---
 scripts/combinejars | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100755 scripts/combinejars

(limited to 'scripts')

diff --git a/scripts/combinejars b/scripts/combinejars
new file mode 100755
index 0000000..338bd6d
--- /dev/null
+++ b/scripts/combinejars
@@ -0,0 +1,26 @@
+#!/bin/bash
+# Usage: combinejars <destination> <jars...>
+#
+# Combines contents of jars into a single destination jar. The
+# destination jar will have all it entries dates set to the unix
+# epoch, hence making it reproducible for the same input.
+#
+# Contents at same paths are overwritten, the latter overwriting the earlier.
+
+destination="$(realpath "$1")"
+shift
+sources=("$@")
+
+workdir="$(mktemp -d)"
+
+cleanup() {
+    rm -rf "$workdir"
+}
+trap cleanup EXIT
+
+for s in "${sources[@]}"; do
+    absolute=$(realpath "$s")
+    (cd "$workdir" || exit 1; unzip -uo "$absolute" > /dev/null)
+done
+find "$workdir" -exec touch -t 197001010000 {} \;
+jar -cMf "$destination" -C "$workdir" .
-- 
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