Wyst package manager

src/install.go

@@ -0,0 +1,98 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"path/filepath"
+)
+
+type PackageVersion struct {
+	Author      string `json:"author"`
+	Description string `json:"description"`
+	URL         string `json:"url"`
+}
+
+type PackageIndex struct {
+	Versions map[string]PackageVersion `json:"versions"`
+}
+
+func installPackage(packageName, packageVersion string) {
+	url := fmt.Sprintf("https://raw.githubusercontent.com/wyst-lang/index/master/%s/index.json", packageName)
+	resp, err := http.Get(url)
+	if err != nil {
+		fmt.Printf("Error fetching package info: %v\n", err)
+		return
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		fmt.Printf("Error: %s\n", resp.Status)
+		return
+	}
+
+	var pkgIndex PackageIndex
+	if err := json.NewDecoder(resp.Body).Decode(&pkgIndex); err != nil {
+		fmt.Printf("Error decoding package info: %v\n", err)
+		return
+	}
+
+	if packageVersion == "" {
+		packageVersion = getLatestVersion(pkgIndex)
+	}
+
+	pkgVersion, exists := pkgIndex.Versions[packageVersion]
+	if !exists {
+		fmt.Printf("Version %s not found for package %s\n", packageVersion, packageName)
+		return
+	}
+
+	downloadAndSavePackage(pkgVersion.URL, packageName, packageVersion)
+}
+
+func getLatestVersion(pkgIndex PackageIndex) string {
+	var latest string
+	for version := range pkgIndex.Versions {
+		if version > latest {
+			latest = version
+		}
+	}
+	return latest
+}
+
+func downloadAndSavePackage(url, packageName, packageVersion string) {
+	resp, err := http.Get(url)
+	if err != nil {
+		fmt.Printf("Error downloading package: %v\n", err)
+		return
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		fmt.Printf("Error: %s\n", resp.Status)
+		return
+	}
+
+	libDir := "lib"
+	if err := os.MkdirAll(libDir, 0755); err != nil {
+		fmt.Printf("Error creating lib directory: %v\n", err)
+		return
+	}
+
+	filename := filepath.Base(url)
+	packageFile := filepath.Join(libDir, filename)
+	out, err := os.Create(packageFile)
+	if err != nil {
+		fmt.Printf("Error creating package file: %v\n", err)
+		return
+	}
+	defer out.Close()
+
+	if _, err := io.Copy(out, resp.Body); err != nil {
+		fmt.Printf("Error saving package: %v\n", err)
+	} else {
+		fmt.Printf("Package %s version %s downloaded and saved successfully as %s\n", packageName, packageVersion, filename)
+	}
+}