chore: update json structure and format

internal/cli/repo.go

@@ -25,16 +25,20 @@ func (app *appEnv) repos() []Repo {
 		return nil
 	}
 
-	rs := make([]Repo, 0, 20)
-	err = json.Unmarshal(conf, &rs)
+	cfg := struct {
+		Repos []Repo `json:"repos"`
+	}{
+		Repos: make([]Repo, 0, 20),
+	}
+	err = json.Unmarshal(conf, &cfg)
 	if err != nil {
 		app.exitVal = exitFailure
 		fmt.Fprintf(os.Stderr, "%s %s: %s\n", app.cmd, app.subCmd, err)
 		return nil
 	}
 
 	// Every repository must have a URL and a directory name.
-	return slices.DeleteFunc(rs, func(r Repo) bool {
+	return slices.DeleteFunc(cfg.Repos, func(r Repo) bool {
 		return r.URL == "" || r.Name == ""
 	})
 }

internal/cli/testdata/backups.json

@@ -1,14 +1,16 @@
-[
-	{
-		"url": "https://github.com/foo/foo.git",
-		"name": "foo.git"
-	},
-	{
-		"url": "https://github.com/bar/bar.git",
-		"name": "bar.git"
-	},
-	{
-		"url": "https://example.com/buzz/fizz.git",
-		"name": "random.git"
-	}
-]
+{
+    "repos": [
+        {
+            "name": "foo.git",
+            "url": "https://github.com/foo/foo.git"
+        },
+        {
+            "name": "bar.git",
+            "url": "https://github.com/bar/bar.git"
+        },
+        {
+            "name": "random.git",
+            "url": "https://example.com/buzz/fizz.git"
+        }
+    ]
+}

internal/cli/testdata/repo-checks.json

@@ -1,10 +1,12 @@
-[
-	{
-		"url": "https://github.com/user/repo.git",
-		"name": ""
-	},
-	{
-		"url": "",
-		"name": "repo.git"
-	}
-]
+{
+    "repos": [
+        {
+            "name": "",
+            "url": "https://github.com/user/repo.git"
+        },
+        {
+            "name": "repo.git",
+            "url": ""
+        }
+    ]
+}