Clarify how args are used in Push

cf/push.go

@@ -38,29 +38,32 @@ var Push = func(appName string, args ...string) *gexec.Session {
 	}
 
 	for i := 0; i < len(args); i += 2 {
-		switch args[i] {
+		flag := args[i]
+		flagValue := args[i+1]
+
+		switch flag {
 		case "-b":
-			app.Buildpacks = append(app.Buildpacks, args[i+1])
+			app.Buildpacks = append(app.Buildpacks, flagValue)
 		case "-c":
-			app.Command = args[i+1]
+			app.Command = flagValue
 		case "-d":
-			app.Routes = append(app.Routes, map[string]string{"route": fmt.Sprintf("%s.%s", appName, args[i+1])})
+			app.Routes = append(app.Routes, map[string]string{"route": fmt.Sprintf("%s.%s", appName, flagValue)})
 		case "-i":
-			instances, err := strconv.Atoi(args[i+1])
+			instances, err := strconv.Atoi(flagValue)
 			if err != nil {
 				panic(err)
 			}
 			app.Instances = instances
 		case "-m":
-			app.Memory = args[i+1]
+			app.Memory = flagValue
 		case "-p":
-			path, err := filepath.Abs(args[i+1])
+			path, err := filepath.Abs(flagValue)
 			if err != nil {
 				panic(err)
 			}
 			app.Path = path
 		case "-s":
-			app.Stack = args[i+1]
+			app.Stack = flagValue
 		}
 	}