Add spin tool

spin.yaml

@@ -0,0 +1,52 @@
+package:
+  name: spin
+  version: 1.4.1
+  epoch: 0
+  description: "Spin is the open source developer tool for building and running serverless applications powered by WebAssembly."
+  copyright:
+    - license: Apache-2.0
+  dependencies:
+    runtime:
+      - git
+
+environment:
+  contents:
+    packages:
+      - wolfi-base
+      - busybox
+      - ca-certificates-bundle
+      - build-base
+      - rustup
+      - cmake
+      - openssl-dev
+      - bash
+
+pipeline:
+  - uses: git-checkout
+    with:
+      repository: https://github.com/fermyon/spin
+      tag: v${{package.version}}
+      expected-commit: e0bd9115fa51399e106681ac1c9ed1afbad1baaa
+
+  - name: Configure and build
+    runs: |
+      # This build requires the stable version of rust, managed by rustup, because it requires a few other toolchains too.
+      rustup install stable
+      rustup target add wasm32-wasi
+      rustup target add wasm32-unknown-unknown
+
+      # This is a bit of a hack, but it's the easiest way to get the right version of rustc and cargo in the path.
+      export PATH="$HOME/.rustup/toolchains/stable-${{host.triplet.rust}}/bin:$PATH"
+
+      cargo build --release
+
+      mkdir -p ${{targets.destdir}}/usr/bin/
+      mv target/release/spin ${{targets.destdir}}/usr/bin/
+
+  - uses: strip
+
+update:
+  enabled: true
+  github:
+    identifier: fermyon/spin
+    strip-prefix: v