added update functionality

cmd/update.go

@@ -0,0 +1,143 @@
+// Copyright © 2026 NAME HERE
+
+package cmd
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/spf13/cobra"
+)
+
+// updateCmd represents the update command
+var updateCmd = &cobra.Command{
+	Use:   "update",
+	Short: "Updates all AUR packages.",
+	Long:  `Just run apac update.`,
+	Run: func(cmd *cobra.Command, args []string) {
+		aurRPC := "https://aur.archlinux.org/rpc/v5/info?arg="
+		out, err := exec.Command("pacman", "-Qm").Output()
+		if err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			return
+		}
+		lines := strings.Split(strings.TrimSpace(string(out)), "\n")
+		if len(lines) == 0 || (len(lines) == 1 && lines[0] == "") {
+			fmt.Println("no aur packages found")
+			return
+		}
+
+		var toUpdate []string
+		for _, l := range lines {
+			if l == "" {
+				continue
+			}
+			pkg := strings.Fields(l)[0]
+
+			// fetch AUR version
+			aurV := ""
+			{
+				client := &http.Client{Timeout: 10 * time.Second}
+				resp, err := client.Get(aurRPC + pkg)
+				if err == nil && resp != nil {
+					var m map[string]interface{}
+					if err := json.NewDecoder(resp.Body).Decode(&m); err == nil {
+						if r, ok := m["results"].([]interface{}); ok && len(r) > 0 {
+							if first, ok := r[0].(map[string]interface{}); ok {
+								if v, ok := first["Version"].(string); ok {
+									aurV = v
+								}
+							}
+						}
+					}
+					resp.Body.Close()
+				}
+			}
+
+			// local version
+			localV := ""
+			{
+				out2, err := exec.Command("pacman", "-Qi", pkg).Output()
+				if err == nil {
+					for _, line := range strings.Split(string(out2), "\n") {
+						if strings.HasPrefix(line, "Version") {
+							parts := strings.SplitN(line, ":", 2)
+							if len(parts) > 1 {
+								localV = strings.TrimSpace(parts[1])
+							}
+							break
+						}
+					}
+				}
+			}
+
+			if aurV == "" {
+				fmt.Printf("%s: not found in AUR\n", pkg)
+			} else if aurV == localV {
+				fmt.Printf("%s: up-to-date (%s)\n", pkg, aurV)
+			} else if aurV > localV {
+				fmt.Printf("%s: update available (AUR=%s local=%s)\n", pkg, aurV, localV)
+				toUpdate = append(toUpdate, pkg)
+			} else {
+				fmt.Printf("%s: local newer (AUR=%s local=%s)\n", pkg, aurV, localV)
+			}
+
+			time.Sleep(150 * time.Millisecond) // small delay to be polite to AUR
+		}
+
+		if len(toUpdate) == 0 {
+			fmt.Println("no updates found")
+			return
+		}
+
+		// create a temporary work dir under current directory: ./apac-aur-builds-<ts>
+		workDir := filepath.Join(".", fmt.Sprintf("apac-aur-builds-%d", time.Now().Unix()))
+		if err := os.MkdirAll(workDir, 0o755); err != nil {
+			fmt.Fprintln(os.Stderr, "failed to create work dir:", err)
+			return
+		}
+		defer func() {
+			// don't remove automatically — user might want to inspect builds
+			fmt.Fprintln(os.Stderr, "builds kept in", workDir)
+		}()
+
+		// clone, makepkg -si for each package
+		for _, p := range toUpdate {
+			tarURL := fmt.Sprintf("https://aur.archlinux.org/%s.git", p)
+			cloneDir := filepath.Join(workDir, p)
+
+			fmt.Println("cloning", tarURL)
+			cloneCmd := exec.Command("git", "clone", "--depth", "1", tarURL, cloneDir)
+			cloneCmd.Stdin = os.Stdin
+			cloneCmd.Stdout = os.Stdout
+			cloneCmd.Stderr = os.Stderr
+			if err := cloneCmd.Run(); err != nil {
+				fmt.Fprintln(os.Stderr, "git clone failed for", p, ":", err)
+				continue
+			}
+
+			// run makepkg -si in cloneDir
+			fmt.Println("building", p)
+			makeCmd := exec.Command("makepkg", "-si", "--noconfirm")
+			makeCmd.Dir = cloneDir
+			makeCmd.Stdin = os.Stdin
+			makeCmd.Stdout = os.Stdout
+			makeCmd.Stderr = os.Stderr
+			if err := makeCmd.Run(); err != nil {
+				fmt.Fprintln(os.Stderr, "makepkg failed for", p, ":", err)
+				continue
+			}
+		}
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(updateCmd)
+}
+