[contrib/] zig sdk test instructions

contrib/makerel

@@ -0,0 +1,28 @@
+#!/bin/bash
+set -euo pipefail
+
+zigdir=out/zig-x86_64-linux-musl-baseline
+
+if [[ ! "$PWD" =~ /zig-bootstrap$ ]]; then
+    >&2 echo "expected to be in zig-bootstrap directory. Bailing"
+    exit 1
+fi
+
+
+if [[ ! -f "$zigdir/bin/zig" ]]; then
+    >&2 echo "$zigdir/bin/zig not found. Please run:"
+    >&2 echo "    ./build -j\$(nproc) x86_64-linux-musl baseline"
+    exit 1
+fi
+
+pushd "$zigdir"
+    vsn=$(bin/zig version)
+    outdir="zig-linux-x86_64-$vsn"
+    mkdir -p "$outdir"
+    cp -r "bin/zig" "$outdir"
+    cp -r "lib/zig" "$outdir/lib"
+    tar -cf "$outdir.tar" "$outdir"
+    xz -vk --fast "$outdir.tar"
+popd
+
+echo "$zigdir/$outdir.tar.xz is ready for use"