Initial project scaffold for Dimma

go/main.go

@@ -0,0 +1,100 @@
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"strings"
+)
+
+const (
+	CurrentVersion = "v0.1.0"
+	ReleaseURL     = "https://gitea.sanplex.xyz/Sansan/dimma/releases/latest"
+)
+
+type ReleaseInfo struct {
+	TagName string `json:"tag_name"`
+}
+
+func main() {
+	check := flag.Bool("check", false, "Check for updates")
+	flag.Parse()
+
+	if !*check {
+		flag.Usage()
+		return
+	}
+
+	fmt.Printf("Current version: %s\n", CurrentVersion)
+
+	latestVersion, err := fetchLatestVersion()
+	if err != nil {
+		fmt.Printf("Error fetching latest version: %v\n", err)
+		return
+	}
+
+	fmt.Printf("Latest version: %s\n", latestVersion)
+
+	if compareVersions(latestVersion, CurrentVersion) > 0 {
+		fmt.Printf("Update available: %s\n", latestVersion)
+	} else {
+		fmt.Println("Up to date")
+	}
+}
+
+func fetchLatestVersion() (string, error) {
+	resp, err := http.Get(ReleaseURL)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("HTTP %d", resp.StatusCode)
+	}
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return "", err
+	}
+
+	// Gitea releases API returns JSON with tag_name
+	var release ReleaseInfo
+	if err := json.Unmarshal(body, &release); err != nil {
+		// Try to extract from HTML if not JSON
+		release.TagName = extractVersionFromHTML(string(body))
+		if release.TagName == "" {
+			return "", fmt.Errorf("failed to parse release info")
+		}
+	}
+
+	return release.TagName, nil
+}
+
+func extractVersionFromHTML(html string) string {
+	// Simple extraction from HTML (fallback for non-API URLs)
+	// Looks for patterns like "v0.1.0" or "0.1.0"
+	parts := strings.Split(html, "v")
+	for _, part := range parts {
+		if len(part) > 0 && part[0] >= '0' && part[0] <= '9' {
+			version := "v" + strings.Split(part, "\"")[0]
+			version = strings.Split(version, " ")[0]
+			version = strings.Split(version, ">")[0]
+			version = strings.TrimSpace(version)
+			if version != "" {
+				return version
+			}
+		}
+	}
+	return ""
+}
+
+func compareVersions(a, b string) int {
+	// Simple version comparison (v0.1.0 format)
+	a = strings.TrimPrefix(a, "v")
+	b = strings.TrimPrefix(b, "v")
+	return strings.Compare(a, b)
+}