Initial commit

1 files changed, 26 insertions, 0 deletions

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" .