better-setup-go v1: pinned static Go, musl-safe

README.md

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+# better-setup-go
+
+Fork of the setup-go recipe for git.madapes.com runners: installs the **pinned** Go from the
+official static tarball. No versions-manifest round-trip, no glibc runtime requirement —
+works on musl runner images where nothing needs installing first.
+
+```yaml
+- uses: https://git.madapes.com/actions/better-setup-go@v1
+  with: { go-version: "1.27.0" }
+```

action.yml

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+name: better-setup-go
+description: Install a pinned Go toolchain from the official static tarball — musl-safe, no manifest fetches, Forgejo/act runner safe.
+inputs:
+  go-version:
+    description: Exact Go version to install (e.g. 1.27.0).
+    required: true
+runs:
+  using: composite
+  steps:
+    - shell: bash
+      run: |
+        set -euo pipefail
+        v="${{ inputs.go-version }}"
+        case "$(uname -m)" in
+          x86_64|amd64) arch=amd64 ;;
+          aarch64|arm64) arch=arm64 ;;
+          *) echo "better-setup-go: unsupported arch $(uname -m)" >&2; exit 1 ;;
+        esac
+        curl -fsSL "https://go.dev/dl/go${v}.linux-${arch}.tar.gz" | tar -xz -C /usr/local
+        ln -sf /usr/local/go/bin/go /usr/local/bin/go
+        ln -sf /usr/local/go/bin/gofmt /usr/local/bin/gofmt
+        go version