Reorganize app dir code

cmd/fdroidcl/install.go

@@ -7,8 +7,6 @@ import (
 	"fmt"
 	"log"
 	"path/filepath"
-
-	"github.com/mvdan/basedir"
 )
 
 var cmdInstall = &Command{
@@ -27,11 +25,10 @@ func runInstall(args []string) {
 	device := mustOneDevice()
 	apps := findApps(args)
 	paths := make([]string, len(apps))
-	apksDir := apksCacheDir()
 	for i, app := range apps {
 		apk := app.CurApk
 		url := fmt.Sprintf("%s/%s", repoURL, apk.ApkName)
-		path := filepath.Join(apksDir, apk.ApkName)
+		path := apkPath(apk.ApkName)
 		if err := downloadEtag(url, path, apk.Hash.Data); err != nil {
 			log.Fatalf("Could not download '%s': %v", app.ID, err)
 		}
@@ -48,18 +45,7 @@ func runInstall(args []string) {
 	}
 }
 
-func apksCacheDir() string {
-	cache, err := basedir.Cache()
-	if err != nil {
-		log.Fatalf("Could not determine cache dir: %v", err)
-	}
-	return appSubdir(cache, "apks")
-}
-
 func apkPath(apkname string) string {
-	cache, err := basedir.Cache()
-	if err != nil {
-		log.Fatalf("Could not determine cache dir: %v", err)
-	}
-	return filepath.Join(appSubdir(cache, "apks"), apkname)
+	apksDir := subdir(mustCache(), "apks")
+	return filepath.Join(apksDir, apkname)
 }

cmd/fdroidcl/main.go

@@ -8,7 +8,10 @@ import (
 	"fmt"
 	"log"
 	"os"
+	"path/filepath"
 	"strings"
+
+	"github.com/mvdan/basedir"
 )
 
 const (
@@ -18,6 +21,36 @@ const (
 	repoURL  = "https://f-droid.org/repo"
 )
 
+func subdir(dir, name string) string {
+	p := filepath.Join(dir, name)
+	if err := os.MkdirAll(p, 0755); err != nil {
+		log.Fatalf("Could not create dir '%s': %v", p, err)
+	}
+	return p
+}
+
+func mustCache() string {
+	dir, err := basedir.Cache()
+	if err != nil {
+		log.Fatalf("Could not determine cache dir: %v", err)
+	}
+	return subdir(dir, cmdName)
+}
+
+func mustConfig() string {
+	dir, err := basedir.Config()
+	if err != nil {
+		log.Fatalf("Could not determine config dir: %v", err)
+	}
+	return subdir(dir, cmdName)
+}
+
+var config struct {
+	Repos map[string]struct {
+		URL string `json:"url"`
+	} `json:"repos"`
+}
+
 // A Command is an implementation of a go command
 // like go build or go fix.
 type Command struct {