refactor: make ReadApps main API entrypoint

This allows AppsReadFS/AppsReadWeb to be used behind the scenes of this
API for the conditional loading logic. All functions are left as public
for now while we're experimenting.

cli/recipe.go

@@ -94,6 +94,28 @@ func AppsFSIsLatest() (bool, error) {
 	return true, nil
 }
 
+func ReadApps() (Apps, error) {
+	apps := make(Apps)
+
+	appsFSIsLatest, err := AppsFSIsLatest()
+	if err != nil {
+		return nil, err
+	}
+
+	if !appsFSIsLatest {
+		if err := ReadAppsWeb(&apps); err != nil {
+			return nil, err
+		}
+		return apps, nil
+	}
+
+	if err := ReadAppsFS(&apps); err != nil {
+		return nil, err
+	}
+
+	return apps, nil
+}
+
 func ReadAppsFS(target interface{}) error {
 	appsJsonFS, err := ioutil.ReadFile(config.APPS_JSON)
 	if err != nil {
@@ -105,36 +127,21 @@ func ReadAppsFS(target interface{}) error {
 	return nil
 }
 
-func ReadAppsWeb() (Apps, error) {
-	apps := make(Apps)
+func ReadAppsWeb(target interface{}) error {
+	if err := readJson(AppsUrl, &target); err != nil {
+		return err
+	}
 
-	appsFSIsLatest, err := AppsFSIsLatest()
+	appsJson, err := json.MarshalIndent(target, "", "    ")
 	if err != nil {
-		return nil, err
+		return err
 	}
 
-	if !appsFSIsLatest {
-		if err := readJson(AppsUrl, &apps); err != nil {
-			return nil, err
-		}
-
-		appsJson, err := json.MarshalIndent(apps, "", "    ")
-		if err != nil {
-			return nil, err
-		}
-
-		if err := ioutil.WriteFile(config.APPS_JSON, appsJson, 0644); err != nil {
-			return nil, err
-		}
-
-		return apps, nil
+	if err := ioutil.WriteFile(config.APPS_JSON, appsJson, 0644); err != nil {
+		return err
 	}
 
-	if err := ReadAppsFS(&apps); err != nil {
-		return nil, err
-	}
-
-	return apps, nil
+	return nil
 }
 
 func SortByAppName(apps Apps) []string {
@@ -150,7 +157,7 @@ var recipeListCommand = &cli.Command{
 	Name:    "list",
 	Aliases: []string{"ls"},
 	Action: func(c *cli.Context) error {
-		appSpecs, err := ReadAppsWeb()
+		apps, err := ReadApps()
 		if err != nil {
 			logrus.Fatal(err.Error())
 		}