feat: add --version flag to display binary version

.github/workflows/ci.yml

@@ -30,9 +30,13 @@ jobs:
     - name: Run unit tests
       run: go test -v -race -coverprofile=coverage.txt -covermode=atomic ./pkg/...
 
+    - name: Check available disk space
+      run: df -h /
+
     - name: Run acceptance tests (Ginkgo)
       env:
         PIVNET_TOKEN: ${{ secrets.PIVNET_TOKEN }}
+        PIVNET_MIN_FREE_SPACE_GB: "2"  # Lower requirement for CI tests (default: 5GB)
         # ENABLE_DOWNLOAD_TESTS: "1"  # Uncomment to run all 12 tests (slower, downloads tiles)
       run: |
         go build -v ./cmd/tile-diff
@@ -63,7 +67,7 @@ jobs:
     - name: Build binary
       run: |
         go build -v -o bin/tile-diff ./cmd/tile-diff
-        ./bin/tile-diff --version || echo "Version command not implemented yet"
+        ./bin/tile-diff --version
 
     - name: Test binary runs
       run: |

Makefile

@@ -1,8 +1,11 @@
 .PHONY: build test acceptance-test acceptance-test-with-token acceptance-test-fast acceptance-test-fast-with-token clean install lint fmt vet
 
+# Get version from git tags, or use "dev" if not on a tag
+VERSION ?= $(shell git describe --tags --always --dirty 2>/dev/null || echo "dev")
+
 # Build the binary
 build:
-	go build -o tile-diff ./cmd/tile-diff
+	go build -ldflags "-X main.version=$(VERSION)" -o tile-diff ./cmd/tile-diff
 
 # Run unit tests
 test:

cmd/tile-diff/main.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strconv"
 	"strings"
 
 	"github.com/malston/tile-diff/pkg/api"
@@ -18,6 +19,9 @@ import (
 	"github.com/malston/tile-diff/pkg/report"
 )
 
+// version is set via ldflags during build
+var version = "dev"
+
 // EnrichmentResult contains the results of release notes enrichment
 type EnrichmentResult struct {
 	Matches    map[string]releasenotes.Match
@@ -181,9 +185,16 @@ func main() {
 	productConfig := flag.String("product-config", "configs/products.yaml", "Path to product config file")
 	verbose := flag.Bool("verbose", false, "Enable verbose output")
 	debugMatching := flag.Bool("debug-matching", false, "Show detailed property-to-feature matching information")
+	showVersion := flag.Bool("version", false, "Show version information")
 
 	flag.Parse()
 
+	// Handle version flag
+	if *showVersion {
+		fmt.Printf("tile-diff version %s\n", version)
+		os.Exit(0)
+	}
+
 	// Track if we're in JSON mode to suppress non-JSON output
 	jsonMode := *reportFormat == "json"
 
@@ -231,6 +242,14 @@ func main() {
 			os.Exit(1)
 		}
 
+		// Get minimum free space requirement from env var or use default
+		minFreeSpaceGB := int64(10) // Default: 10GB (most tiles < 5GB, some > 10GB)
+		if envSpace := os.Getenv("PIVNET_MIN_FREE_SPACE_GB"); envSpace != "" {
+			if parsed, err := strconv.ParseInt(envSpace, 10, 64); err == nil && parsed > 0 {
+				minFreeSpaceGB = parsed
+			}
+		}
+
 		if *reportFormat != "json" {
 			fmt.Printf("tile-diff - Ops Manager Product Tile Comparison\n")
 			fmt.Printf("================================================\n\n")
@@ -265,7 +284,7 @@ func main() {
 		}
 
 		// Create downloader (quiet mode in JSON to suppress progress output)
-		downloader := pivnet.NewDownloader(client, cacheDirectory, manifestFile, eulaFile, 20, jsonMode)
+		downloader := pivnet.NewDownloader(client, cacheDirectory, manifestFile, eulaFile, minFreeSpaceGB, jsonMode)
 
 		// Download old tile
 		if !jsonMode {

test/acceptance_test.go

@@ -12,6 +12,29 @@ import (
 	. "github.com/onsi/gomega"
 )
 
+var _ = Describe("Basic Flags", func() {
+	BeforeEach(func() {
+		if _, err := os.Stat(tileDiffBin); os.IsNotExist(err) {
+			Fail(fmt.Sprintf("tile-diff binary not found at %s - run 'make build' first", tileDiffBin))
+		}
+	})
+
+	Describe("Version Flag", func() {
+		It("prints version information when --version is provided", func() {
+			output, err := runTileDiff("--version")
+
+			// Should succeed
+			Expect(err).NotTo(HaveOccurred(), "Should exit successfully")
+
+			// Should contain version information
+			Expect(output).To(ContainSubstring("version"), "Should contain 'version' in output")
+
+			// Should not contain error messages
+			Expect(output).NotTo(ContainSubstring("Error"), "Should not contain error messages")
+		})
+	})
+})
+
 var _ = Describe("Pivnet Integration", func() {
 	BeforeEach(func() {
 		if _, err := os.Stat(tileDiffBin); os.IsNotExist(err) {