feat: add versioning, self-update, and install script

- internal/version: version from ldflags or VCS fallback
- internal/update: self-update from GitHub Releases with SHA256 verification
- main.go: add -version and -update flags
- Makefile: git describe versioning, install target
- release workflow: tarballs + SHA256SUMS per platform
- scripts/install.sh: curl | bash installer

Amp-Thread-ID: https://ampcode.com/threads/T-019cc9da-8040-72f9-ba53-c9ba22443049
Co-authored-by: Amp <amp@ampcode.com>

Author: sinnet3000

.github/workflows/release.yml

@@ -9,29 +9,77 @@ permissions:
   contents: write
 
 jobs:
-  release:
+  build:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        include:
+          - goos: linux
+            goarch: amd64
+          - goos: linux
+            goarch: arm64
+          - goos: linux
+            goarch: arm
+          - goos: darwin
+            goarch: amd64
+          - goos: darwin
+            goarch: arm64
+          - goos: windows
+            goarch: amd64
+
     steps:
       - uses: actions/checkout@v4
 
       - uses: actions/setup-go@v5
         with:
           go-version-file: go.mod
 
-      - name: Build binaries
-        run: make build
+      - name: Build
+        env:
+          GOOS: ${{ matrix.goos }}
+          GOARCH: ${{ matrix.goarch }}
+          CGO_ENABLED: "0"
+        run: |
+          VERSION=${GITHUB_REF#refs/tags/v}
+          EXT=""
+          if [ "$GOOS" = "windows" ]; then EXT=".exe"; fi
+
+          mkdir -p dist
+          LDFLAGS="-s -w -X ip_exit_enum/internal/version.Version=v${VERSION}"
+          go build -ldflags="$LDFLAGS" -o dist/ip_exit_enum${EXT} .
+
+          cd dist
+          ARCHIVE="ip_exit_enum_${VERSION}_${{ matrix.goos }}_${{ matrix.goarch }}.tar.gz"
+          tar czf "$ARCHIVE" ip_exit_enum${EXT}
+          rm ip_exit_enum${EXT}
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: ip_exit_enum-${{ matrix.goos }}-${{ matrix.goarch }}
+          path: dist/*.tar.gz
+
+  release:
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+          merge-multiple: true
+
+      - name: Generate checksums
+        run: |
+          cd artifacts
+          sha256sum *.tar.gz > SHA256SUMS
+          cat SHA256SUMS
 
       - name: Create release
         env:
           GH_TOKEN: ${{ github.token }}
         run: |
-          NOTES_FILE=""
-          if [ -f RELEASE_NOTES.md ]; then
-            NOTES_FILE="--notes-file RELEASE_NOTES.md"
-          else
-            NOTES_FILE="--generate-notes"
-          fi
           gh release create "${{ github.ref_name }}" \
             --title "${{ github.ref_name }}" \
-            $NOTES_FILE \
-            bin/*
+            --generate-notes \
+            artifacts/*

Makefile

@@ -2,19 +2,18 @@
 BINARY=ip_exit_enum
 
 # Version information
-VERSION=1.0.0
-BUILD_TIME=$(shell date +%FT%T%z)
+VERSION=$(shell git describe --tags --always --dirty 2>/dev/null || echo "dev")
 
 # Build flags
-LDFLAGS=-ldflags "-X main.version=${VERSION}"
+LDFLAGS=-ldflags "-X ip_exit_enum/internal/version.Version=$(VERSION)"
 
 # Platforms
 PLATFORMS=linux/amd64 linux/arm64 linux/arm darwin/amd64 darwin/arm64 windows/amd64
 
 # Output directories
 DIST_DIR=bin
 
-.PHONY: all clean help
+.PHONY: all clean help build install
 
 all: clean build
 
@@ -32,6 +31,12 @@ build:
 	done
 	 @echo "Build complete! Binaries are in ${DIST_DIR}/"
 
+install:
+	 @if [ -z "$(HOME)" ]; then echo "error: HOME is not set" >&2; exit 1; fi
+	 @mkdir -p "$(HOME)/.local/bin"
+	 go build ${LDFLAGS} -o "$(HOME)/.local/bin/${BINARY}" .
+	 @echo "Installed to ~/.local/bin/${BINARY}"
+
 clean:
 	 @rm -rf ${DIST_DIR}
 	 @echo "Cleaned ${DIST_DIR}/ directory"
@@ -41,5 +46,6 @@ help:
 	 @echo "Available targets:"
 	 @echo "  all      - Clean and build all binaries (default)"
 	 @echo "  build    - Build binaries for all platforms"
+	 @echo "  install  - Build and install to ~/.local/bin"
 	 @echo "  clean    - Remove build artifacts"
 	 @echo "  help     - Show this help message"