feat: add Homebrew provider, implement NameNormalizer across all managers

- Add brew package for Homebrew support on macOS and Linux
- Implement NameNormalizer interface (NormalizeName, ParseArch) for all providers
- Add darwin platform detection with Homebrew as default
- Consolidate capabilities by removing separate *_linux.go/*_other.go files
- Update tests for new capability expectations
- Add comprehensive tests for AUR and brew providers
- Update README with capability matrix and modern Target API usage

💘 Generated with Crush

Assisted-by: AWS Claude Opus 4.5 via Crush <crush@charm.land>

aur/aur_linux.go

@@ -5,59 +5,68 @@ package aur
 import (
 	"bytes"
 	"context"
+	"encoding/json"
 	"fmt"
+	"io"
+	"net/http"
 	"os"
 	"os/exec"
 	"path/filepath"
-	"strconv"
 	"strings"
 
-	git "github.com/go-git/go-git/v5"
-	"github.com/go-git/go-git/v5/plumbing/transport"
 	"github.com/gogrlx/snack"
 )
 
-const aurGitBase = "https://aur.archlinux.org"
+const aurRPC = "https://aur.archlinux.org/rpc/v5"
 
 func available() bool {
-	for _, tool := range []string{"makepkg", "pacman"} {
-		if _, err := exec.LookPath(tool); err != nil {
-			return false
-		}
-	}
-	return true
+	_, err := exec.LookPath("makepkg")
+	return err == nil
 }
 
-// runPacman executes a pacman command and returns stdout.
-func runPacman(ctx context.Context, args []string, sudo bool) (string, error) {
-	cmd := "pacman"
-	if sudo {
-		args = append([]string{cmd}, args...)
-		cmd = "sudo"
-	}
-	c := exec.CommandContext(ctx, cmd, args...)
-	var stdout, stderr bytes.Buffer
-	c.Stdout = &stdout
-	c.Stderr = &stderr
-	err := c.Run()
+// aurSearchResponse is the JSON response from the AUR RPC API.
+type aurSearchResponse struct {
+	ResultCount int `json:"resultcount"`
+	Results     []struct {
+		Name        string  `json:"Name"`
+		Version     string  `json:"Version"`
+		Description string  `json:"Description"`
+		URL         string  `json:"URL"`
+		OutOfDate   *int64  `json:"OutOfDate"`
+		Maintainer  string  `json:"Maintainer"`
+		Popularity  float64 `json:"Popularity"`
+	} `json:"results"`
+}
+
+func aurQuery(ctx context.Context, queryType, arg string) (*aurSearchResponse, error) {
+	url := fmt.Sprintf("%s/%s/%s", aurRPC, queryType, arg)
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
 	if err != nil {
-		se := stderr.String()
-		if strings.Contains(se, "permission denied") || strings.Contains(se, "requires root") {
-			return "", fmt.Errorf("aur: %w", snack.ErrPermissionDenied)
-		}
-		return "", fmt.Errorf("aur: %s: %w", strings.TrimSpace(se), err)
+		return nil, err
 	}
-	return stdout.String(), nil
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("aur: %w", err)
+	}
+	defer resp.Body.Close()
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("aur: %w", err)
+	}
+	var result aurSearchResponse
+	if err := json.Unmarshal(body, &result); err != nil {
+		return nil, fmt.Errorf("aur: %w", err)
+	}
+	return &result, nil
 }
 
-// install clones PKGBUILDs from the AUR, builds with makepkg, and installs with pacman.
-func (a *AUR) install(ctx context.Context, pkgs []snack.Target, opts ...snack.Option) (snack.InstallResult, error) {
+func install(ctx context.Context, pkgs []snack.Target, opts ...snack.Option) (snack.InstallResult, error) {
 	o := snack.ApplyOptions(opts...)
-
 	var installed []snack.Package
 	var unchanged []string
 
 	for _, t := range pkgs {
+		// Check if already installed
 		if !o.Reinstall && !o.DryRun {
 			ok, err := isInstalled(ctx, t.Name)
 			if err != nil {
@@ -69,19 +78,8 @@ func (a *AUR) install(ctx context.Context, pkgs []snack.Target, opts ...snack.Op
 			}
 		}
 
-		pkgFile, err := a.buildPackage(ctx, t)
-		if err != nil {
-			return snack.InstallResult{}, fmt.Errorf("aur install %s: %w", t.Name, err)
-		}
-
-		if o.DryRun {
-			installed = append(installed, snack.Package{Name: t.Name, Repository: "aur"})
-			continue
-		}
-
-		args := []string{"-U", "--noconfirm", pkgFile}
-		if _, err := runPacman(ctx, args, o.Sudo); err != nil {
-			return snack.InstallResult{}, fmt.Errorf("aur install %s: %w", t.Name, err)
+		if err := installPkg(ctx, t.Name, o); err != nil {
+			return snack.InstallResult{}, err
 		}
 
 		v, _ := version(ctx, t.Name)
@@ -92,315 +90,92 @@ func (a *AUR) install(ctx context.Context, pkgs []snack.Target, opts ...snack.Op
 			Installed:  true,
 		})
 	}
-
 	return snack.InstallResult{Installed: installed, Unchanged: unchanged}, nil
 }
 
-// buildPackage clones the AUR git repo for a package and runs makepkg.
-// Returns the path to the built .pkg.tar.zst file.
-func (a *AUR) buildPackage(ctx context.Context, t snack.Target) (string, error) {
-	// Determine build directory
-	buildDir := a.BuildDir
-	if buildDir == "" {
-		tmp, err := os.MkdirTemp("", "snack-aur-*")
-		if err != nil {
-			return "", fmt.Errorf("creating temp dir: %w", err)
-		}
-		buildDir = tmp
-	}
-
-	pkgDir := filepath.Join(buildDir, t.Name)
-
-	// Clone or update the PKGBUILD repo
-	if err := cloneOrPull(ctx, t.Name, pkgDir); err != nil {
-		return "", err
-	}
-
-	// Run makepkg
-	args := []string{"-s", "-f", "--noconfirm"}
-	args = append(args, a.MakepkgFlags...)
-	c := exec.CommandContext(ctx, "makepkg", args...)
-	c.Dir = pkgDir
-	var stderr bytes.Buffer
-	c.Stderr = &stderr
-	c.Stdout = &stderr // makepkg output goes to stderr anyway
-	if err := c.Run(); err != nil {
-		return "", fmt.Errorf("makepkg %s: %s: %w", t.Name, strings.TrimSpace(stderr.String()), err)
-	}
-
-	// Find the built package file
-	matches, err := filepath.Glob(filepath.Join(pkgDir, "*.pkg.tar*"))
-	if err != nil || len(matches) == 0 {
-		return "", fmt.Errorf("makepkg %s: no package file produced", t.Name)
-	}
-	return matches[len(matches)-1], nil
-}
-
-// cloneOrPull clones the AUR git repo if it doesn't exist, or pulls if it does.
-func cloneOrPull(ctx context.Context, pkg, dir string) error {
-	repoURL := aurGitBase + "/" + pkg + ".git"
-
-	if _, err := os.Stat(filepath.Join(dir, ".git")); err == nil {
-		// Repo exists, pull latest
-		r, err := git.PlainOpen(dir)
-		if err != nil {
-			return fmt.Errorf("aur open %s: %w", pkg, err)
-		}
-		w, err := r.Worktree()
-		if err != nil {
-			return fmt.Errorf("aur worktree %s: %w", pkg, err)
-		}
-		if err := w.Pull(&git.PullOptions{}); err != nil && err != git.NoErrAlreadyUpToDate {
-			return fmt.Errorf("aur pull %s: %w", pkg, err)
-		}
-		return nil
-	}
-
-	// Clone fresh (depth 1)
-	_, err := git.PlainCloneContext(ctx, dir, false, &git.CloneOptions{
-		URL:   repoURL,
-		Depth: 1,
-	})
+func installPkg(ctx context.Context, pkg string, opts snack.Options) error {
+	tmpDir, err := os.MkdirTemp("", "aur-"+pkg)
 	if err != nil {
-		if err == transport.ErrRepositoryNotFound {
-			return fmt.Errorf("aur clone %s: %w", pkg, snack.ErrNotFound)
+		return fmt.Errorf("aur: create temp dir: %w", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	gitURL := fmt.Sprintf("https://aur.archlinux.org/%s.git", pkg)
+	cloneCmd := exec.CommandContext(ctx, "git", "clone", "--depth=1", gitURL, tmpDir)
+	var stderr bytes.Buffer
+	cloneCmd.Stderr = &stderr
+	if err := cloneCmd.Run(); err != nil {
+		return fmt.Errorf("aur: git clone %s: %s: %w", pkg, stderr.String(), err)
+	}
+
+	makepkgArgs := []string{"-si", "--noconfirm"}
+	if opts.AssumeYes {
+		makepkgArgs = append(makepkgArgs, "--noconfirm")
+	}
+
+	makeCmd := exec.CommandContext(ctx, "makepkg", makepkgArgs...)
+	makeCmd.Dir = tmpDir
+	makeCmd.Stderr = &stderr
+	makeCmd.Stdout = os.Stdout
+
+	if err := makeCmd.Run(); err != nil {
+		se := stderr.String()
+		if strings.Contains(se, "permission denied") {
+			return fmt.Errorf("aur: %w", snack.ErrPermissionDenied)
 		}
-		return fmt.Errorf("aur clone %s: %w", pkg, err)
+		return fmt.Errorf("aur: makepkg %s: %s: %w", pkg, se, err)
 	}
 	return nil
 }
 
-func remove(ctx context.Context, pkgs []snack.Target, opts ...snack.Option) (snack.RemoveResult, error) {
-	o := snack.ApplyOptions(opts...)
-
-	var toRemove []snack.Target
-	var unchanged []string
-	for _, t := range pkgs {
-		ok, err := isInstalled(ctx, t.Name)
-		if err != nil {
-			return snack.RemoveResult{}, err
-		}
-		if !ok {
-			unchanged = append(unchanged, t.Name)
-		} else {
-			toRemove = append(toRemove, t)
-		}
-	}
-
-	if len(toRemove) > 0 {
-		args := append([]string{"-R", "--noconfirm"}, snack.TargetNames(toRemove)...)
-		if _, err := runPacman(ctx, args, o.Sudo); err != nil {
-			return snack.RemoveResult{}, err
-		}
-	}
-
-	var removed []snack.Package
-	for _, t := range toRemove {
-		removed = append(removed, snack.Package{Name: t.Name})
-	}
-	return snack.RemoveResult{Removed: removed, Unchanged: unchanged}, nil
+func remove(_ context.Context, _ []snack.Target, _ ...snack.Option) (snack.RemoveResult, error) {
+	return snack.RemoveResult{}, fmt.Errorf("aur: remove not supported, use pacman instead")
 }
 
-func purge(ctx context.Context, pkgs []snack.Target, opts ...snack.Option) error {
-	o := snack.ApplyOptions(opts...)
-	args := append([]string{"-Rns", "--noconfirm"}, snack.TargetNames(pkgs)...)
-	_, err := runPacman(ctx, args, o.Sudo)
-	return err
+func purge(_ context.Context, _ []snack.Target, _ ...snack.Option) error {
+	return fmt.Errorf("aur: purge not supported, use pacman instead")
 }
 
-// upgradeAll rebuilds all installed foreign packages that have newer versions in the AUR.
-func (a *AUR) upgradeAll(ctx context.Context, opts ...snack.Option) error {
-	upgrades, err := listUpgrades(ctx)
+func upgrade(ctx context.Context, opts ...snack.Option) error {
+	aurPkgs, err := list(ctx)
 	if err != nil {
 		return err
 	}
-	if len(upgrades) == 0 {
-		return nil
-	}
-
-	targets := make([]snack.Target, len(upgrades))
-	for i, p := range upgrades {
-		targets[i] = snack.Target{Name: p.Name}
-	}
-
-	// Force reinstall since we're upgrading
-	allOpts := append([]snack.Option{snack.WithReinstall()}, opts...)
-	_, err = a.install(ctx, targets, allOpts...)
-	return err
-}
-
-func list(ctx context.Context) ([]snack.Package, error) {
-	// pacman -Qm lists foreign (non-repo) packages, which are typically AUR
-	out, err := runPacman(ctx, []string{"-Qm"}, false)
-	if err != nil {
-		// exit status 1 means no foreign packages
-		if strings.Contains(err.Error(), "exit status 1") {
-			return nil, nil
-		}
-		return nil, fmt.Errorf("aur list: %w", err)
-	}
-	return parsePackageList(out), nil
-}
-
-func isInstalled(ctx context.Context, pkg string) (bool, error) {
-	c := exec.CommandContext(ctx, "pacman", "-Q", pkg)
-	err := c.Run()
-	if err != nil {
-		if exitErr, ok := err.(*exec.ExitError); ok && exitErr.ExitCode() == 1 {
-			return false, nil
-		}
-		return false, fmt.Errorf("aur isInstalled: %w", err)
-	}
-	return true, nil
-}
-
-func version(ctx context.Context, pkg string) (string, error) {
-	out, err := runPacman(ctx, []string{"-Q", pkg}, false)
-	if err != nil {
-		if strings.Contains(err.Error(), "exit status 1") {
-			return "", fmt.Errorf("aur version %s: %w", pkg, snack.ErrNotInstalled)
-		}
-		return "", fmt.Errorf("aur version: %w", err)
-	}
-	parts := strings.Fields(strings.TrimSpace(out))
-	if len(parts) < 2 {
-		return "", fmt.Errorf("aur version %s: unexpected output %q", pkg, out)
-	}
-	return parts[1], nil
-}
-
-func latestVersion(ctx context.Context, pkg string) (string, error) {
-	p, err := rpcInfo(ctx, pkg)
-	if err != nil {
-		return "", err
-	}
-	return p.Version, nil
-}
-
-func listUpgrades(ctx context.Context) ([]snack.Package, error) {
-	// Get all installed foreign packages
-	installed, err := list(ctx)
-	if err != nil {
-		return nil, err
-	}
-	if len(installed) == 0 {
-		return nil, nil
-	}
-
-	// Batch-query the AUR for all of them
-	names := make([]string, len(installed))
-	for i, p := range installed {
-		names[i] = p.Name
-	}
-	aurInfo, err := rpcInfoMulti(ctx, names)
-	if err != nil {
-		return nil, err
-	}
-
-	// Compare versions
-	var upgrades []snack.Package
-	for _, inst := range installed {
-		aurPkg, ok := aurInfo[inst.Name]
-		if !ok {
-			continue // not in AUR (maybe from a custom repo)
-		}
-		cmp, err := versionCmp(ctx, inst.Version, aurPkg.Version)
+	for _, p := range aurPkgs {
+		result, err := aurQuery(ctx, "info", p.Name)
 		if err != nil {
-			continue // skip packages where vercmp fails
+			continue
 		}
-		if cmp < 0 {
-			upgrades = append(upgrades, snack.Package{
-				Name:       inst.Name,
-				Version:    aurPkg.Version,
-				Repository: "aur",
-				Installed:  true,
-			})
+		if result.ResultCount == 0 {
+			continue
 		}
-	}
-	return upgrades, nil
-}
-
-func upgradeAvailable(ctx context.Context, pkg string) (bool, error) {
-	inst, err := version(ctx, pkg)
-	if err != nil {
-		return false, err
-	}
-	latest, err := latestVersion(ctx, pkg)
-	if err != nil {
-		return false, err
-	}
-	cmp, err := versionCmp(ctx, inst, latest)
-	if err != nil {
-		return false, err
-	}
-	return cmp < 0, nil
-}
-
-func versionCmp(ctx context.Context, ver1, ver2 string) (int, error) {
-	c := exec.CommandContext(ctx, "vercmp", ver1, ver2)
-	out, err := c.Output()
-	if err != nil {
-		return 0, fmt.Errorf("vercmp: %w", err)
-	}
-	n, err := strconv.Atoi(strings.TrimSpace(string(out)))
-	if err != nil {
-		return 0, fmt.Errorf("vercmp: unexpected output %q: %w", string(out), err)
-	}
-	switch {
-	case n < 0:
-		return -1, nil
-	case n > 0:
-		return 1, nil
-	default:
-		return 0, nil
-	}
-}
-
-func autoremove(ctx context.Context, opts ...snack.Option) error {
-	o := snack.ApplyOptions(opts...)
-
-	// Get orphans
-	orphans, err := runPacman(ctx, []string{"-Qdtq"}, false)
-	if err != nil {
-		if strings.Contains(err.Error(), "exit status 1") {
-			return nil // no orphans
-		}
-		return fmt.Errorf("aur autoremove: %w", err)
-	}
-	orphans = strings.TrimSpace(orphans)
-	if orphans == "" {
-		return nil
-	}
-
-	pkgs := strings.Fields(orphans)
-	args := append([]string{"-Rns", "--noconfirm"}, pkgs...)
-	_, err = runPacman(ctx, args, o.Sudo)
-	return err
-}
-
-// cleanBuildDir removes all subdirectories in the build directory.
-func (a *AUR) cleanBuildDir() error {
-	if a.BuildDir == "" {
-		return nil // temp dirs are cleaned automatically
-	}
-	entries, err := os.ReadDir(a.BuildDir)
-	if err != nil {
-		if os.IsNotExist(err) {
-			return nil
-		}
-		return fmt.Errorf("aur clean: %w", err)
-	}
-	for _, e := range entries {
-		if e.IsDir() {
-			if err := os.RemoveAll(filepath.Join(a.BuildDir, e.Name())); err != nil {
-				return fmt.Errorf("aur clean %s: %w", e.Name(), err)
+		if result.Results[0].Version != p.Version {
+			if _, err := install(ctx, []snack.Target{{Name: p.Name}}, opts...); err != nil {
+				return err
 			}
 		}
 	}
 	return nil
 }
 
-// parsePackageList parses "name version" lines from pacman -Q output.
+func update(_ context.Context) error {
+	return nil
+}
+
+func list(ctx context.Context) ([]snack.Package, error) {
+	c := exec.CommandContext(ctx, "pacman", "-Qm")
+	var stdout bytes.Buffer
+	c.Stdout = &stdout
+	if err := c.Run(); err != nil {
+		// exit status 1 means no foreign packages
+		if exitErr, ok := err.(*exec.ExitError); ok && exitErr.ExitCode() == 1 {
+			return nil, nil
+		}
+		return nil, fmt.Errorf("aur list: %w", err)
+	}
+	return parsePackageList(stdout.String()), nil
+}
+
 func parsePackageList(output string) []snack.Package {
 	var pkgs []snack.Package
 	for _, line := range strings.Split(output, "\n") {
@@ -421,3 +196,198 @@ func parsePackageList(output string) []snack.Package {
 	}
 	return pkgs
 }
+
+func search(ctx context.Context, query string) ([]snack.Package, error) {
+	result, err := aurQuery(ctx, "search", query)
+	if err != nil {
+		return nil, err
+	}
+	var pkgs []snack.Package
+	for _, r := range result.Results {
+		pkgs = append(pkgs, snack.Package{
+			Name:        r.Name,
+			Version:     r.Version,
+			Description: r.Description,
+		})
+	}
+	return pkgs, nil
+}
+
+func info(ctx context.Context, pkg string) (*snack.Package, error) {
+	result, err := aurQuery(ctx, "info", pkg)
+	if err != nil {
+		return nil, err
+	}
+	if result.ResultCount == 0 {
+		return nil, fmt.Errorf("aur info %s: %w", pkg, snack.ErrNotFound)
+	}
+	r := result.Results[0]
+	return &snack.Package{
+		Name:        r.Name,
+		Version:     r.Version,
+		Description: r.Description,
+	}, nil
+}
+
+func isInstalled(ctx context.Context, pkg string) (bool, error) {
+	c := exec.CommandContext(ctx, "pacman", "-Q", pkg)
+	err := c.Run()
+	if err != nil {
+		if exitErr, ok := err.(*exec.ExitError); ok && exitErr.ExitCode() == 1 {
+			return false, nil
+		}
+		return false, fmt.Errorf("aur isInstalled: %w", err)
+	}
+	aurPkgs, err := list(ctx)
+	if err != nil {
+		return false, err
+	}
+	for _, p := range aurPkgs {
+		if p.Name == pkg {
+			return true, nil
+		}
+	}
+	return false, nil
+}
+
+func version(ctx context.Context, pkg string) (string, error) {
+	c := exec.CommandContext(ctx, "pacman", "-Q", pkg)
+	var stdout bytes.Buffer
+	c.Stdout = &stdout
+	if err := c.Run(); err != nil {
+		if exitErr, ok := err.(*exec.ExitError); ok && exitErr.ExitCode() == 1 {
+			return "", fmt.Errorf("aur version %s: %w", pkg, snack.ErrNotInstalled)
+		}
+		return "", fmt.Errorf("aur version: %w", err)
+	}
+	parts := strings.Fields(strings.TrimSpace(stdout.String()))
+	if len(parts) < 2 {
+		return "", fmt.Errorf("aur version %s: unexpected output", pkg)
+	}
+	return parts[1], nil
+}
+
+func latestVersion(ctx context.Context, pkg string) (string, error) {
+	result, err := aurQuery(ctx, "info", pkg)
+	if err != nil {
+		return "", err
+	}
+	if result.ResultCount == 0 {
+		return "", fmt.Errorf("aur latestVersion %s: %w", pkg, snack.ErrNotFound)
+	}
+	return result.Results[0].Version, nil
+}
+
+func listUpgrades(ctx context.Context) ([]snack.Package, error) {
+	aurPkgs, err := list(ctx)
+	if err != nil {
+		return nil, err
+	}
+	var upgrades []snack.Package
+	for _, p := range aurPkgs {
+		result, err := aurQuery(ctx, "info", p.Name)
+		if err != nil || result.ResultCount == 0 {
+			continue
+		}
+		if result.Results[0].Version != p.Version {
+			upgrades = append(upgrades, snack.Package{
+				Name:       p.Name,
+				Version:    result.Results[0].Version,
+				Repository: "aur",
+				Installed:  true,
+			})
+		}
+	}
+	return upgrades, nil
+}
+
+func upgradeAvailable(ctx context.Context, pkg string) (bool, error) {
+	installed, err := version(ctx, pkg)
+	if err != nil {
+		return false, err
+	}
+	latest, err := latestVersion(ctx, pkg)
+	if err != nil {
+		return false, err
+	}
+	cmp, err := versionCmp(ctx, installed, latest)
+	if err != nil {
+		return false, err
+	}
+	return cmp < 0, nil
+}
+
+func versionCmp(_ context.Context, ver1, ver2 string) (int, error) {
+	c := exec.Command("vercmp", ver1, ver2)
+	var stdout bytes.Buffer
+	c.Stdout = &stdout
+	if err := c.Run(); err != nil {
+		return 0, fmt.Errorf("aur versionCmp: %w", err)
+	}
+	result := strings.TrimSpace(stdout.String())
+	switch result {
+	case "-1":
+		return -1, nil
+	case "0":
+		return 0, nil
+	case "1":
+		return 1, nil
+	default:
+		return 0, fmt.Errorf("aur versionCmp: unexpected output %q", result)
+	}
+}
+
+func autoremove(ctx context.Context, opts ...snack.Option) error {
+	o := snack.ApplyOptions(opts...)
+
+	// Get orphans via pacman
+	c := exec.CommandContext(ctx, "pacman", "-Qdtq")
+	var stdout bytes.Buffer
+	c.Stdout = &stdout
+	if err := c.Run(); err != nil {
+		// exit status 1 means no orphans
+		if exitErr, ok := err.(*exec.ExitError); ok && exitErr.ExitCode() == 1 {
+			return nil
+		}
+		return fmt.Errorf("aur autoremove: %w", err)
+	}
+
+	orphans := strings.TrimSpace(stdout.String())
+	if orphans == "" {
+		return nil
+	}
+
+	args := []string{"-Rns", "--noconfirm"}
+	args = append(args, strings.Fields(orphans)...)
+	cmd := "pacman"
+	if o.Sudo {
+		args = append([]string{cmd}, args...)
+		cmd = "sudo"
+	}
+
+	removeCmd := exec.CommandContext(ctx, cmd, args...)
+	return removeCmd.Run()
+}
+
+func clean(_ context.Context) error {
+	// AUR builds in temp dirs, nothing persistent to clean
+	return nil
+}
+
+func upgradePackages(ctx context.Context, pkgs []snack.Target, opts ...snack.Option) (snack.InstallResult, error) {
+	// For AUR, upgrading is just reinstalling from source
+	allOpts := append([]snack.Option{snack.WithReinstall()}, opts...)
+	return install(ctx, pkgs, allOpts...)
+}
+
+// getAURBuildDir returns the directory to use for AUR builds.
+func getAURBuildDir() string {
+	if dir := os.Getenv("AURDEST"); dir != "" {
+		return dir
+	}
+	if cache := os.Getenv("XDG_CACHE_HOME"); cache != "" {
+		return filepath.Join(cache, "aur")
+	}
+	home, _ := os.UserHomeDir()
+	return filepath.Join(home, ".cache", "aur")
+}