检查用户所要求的作用域是否能执行

src/chsrc-main.c

@@ -335,7 +335,7 @@ cli_print_target_features (Target_t *target, const char *input_target_name)
           printf (" %s%s (%s)\n", bdred(NoMark), purple(scope_msg), "是否支持该作用域尚不了解，欢迎贡献");
           break;
         case ScopeCap_Unable:
-          printf (" %s%s (%s)\n", bdred(NoMark), purple(scope_msg), "不支持的作用域");
+          printf (" %s%s (%s)\n", bdred(NoMark), purple(scope_msg), "不支持");
           break;
         case ScopeCap_Able_But_Not_Implemented:
           printf (" %s%s (%s)\n", bdyellow(HalfYesMark), purple(scope_msg), "支持但未实现");
@@ -666,6 +666,8 @@ get_target (const char *input, TargetOp code, char *option)
     {
       if (target->setfn)
         {
+          /* Hook时机: 开始运行前可以在这里进行一些拦截操作 */
+          chsrc_check_scope_capability (target); /* 用户要求设置的作用域，真的能够执行吗？ */
           target->setfn(option);
         }
       else chsrc_error (xy_strcat (3, "暂未对 ", input, " 实现 set 功能，邀您帮助: chsrc issue"));

src/framework/core.c

@@ -1277,6 +1277,62 @@ chsrc_conclude (Source_t *source)
 }
 
 
+/**
+ * @brief 检测该 target 是否实现了用户所指定的 scope 能力
+ *
+ * @note 此函数目前只支持中文
+ */
+void
+chsrc_check_scope_capability (Target_t *target)
+{
+  ScopeCapability_t cap = ScopeCap_Unknown;
+
+  char *msg1 = "不支持";
+  char *msg2 = "换源，请使用 chsrc ls ";
+  char *msg3 = " 查看支持的作用域以及默认作用域";
+
+  char *aliases = target->aliases;
+  char *scope_name = NULL;
+
+  if (chsrc_in_project_scope_mode())
+    {
+      cap = target->scope_caps[ScopeCap_Slot_Project];
+
+      if (cap != ScopeCap_Able_And_Implemented)
+        {
+          scope_name = "项目级";
+          char* msg = xy_strcat (5, msg1, scope_name, msg2, aliases, msg3);
+          chsrc_error (msg);
+          exit (Exit_UserCause);
+        }
+    }
+  if (chsrc_in_user_scope_mode())
+    {
+      cap = target->scope_caps[ScopeCap_Slot_User];
+
+      if (cap != ScopeCap_Able_And_Implemented)
+        {
+          scope_name = "用户级";
+          char* msg = xy_strcat (5, msg1, scope_name, msg2, aliases, msg3);
+          chsrc_error (msg);
+          exit (Exit_UserCause);
+        }
+    }
+  if (chsrc_in_system_scope_mode())
+    {
+      cap = target->scope_caps[ScopeCap_Slot_System];
+
+      if (cap != ScopeCap_Able_And_Implemented)
+        {
+          scope_name = "系统级";
+          char* msg = xy_strcat (5, msg1, scope_name, msg2, aliases, msg3);
+          chsrc_error (msg);
+          exit (Exit_UserCause);
+        }
+    }
+}
+
+
 
 void
 chsrc_ensure_root ()

src/framework/struct.h

@@ -108,6 +108,9 @@ typedef enum Scope_t
 Scope_t;
 
 #define NumberOfScopeType 3
+#define ScopeCap_Slot_Project 0
+#define ScopeCap_Slot_User    1
+#define ScopeCap_Slot_System  2
 
 typedef enum ScopeCapability_t
 {
@@ -166,9 +169,7 @@ typedef struct Target_t
 
   /**
    * 各作用域的支持情况
-   * 0: project scope
-   * 1: user scope
-   * 2: system scope
+   * 参考 ScopeCap_Slot_Xxx 的值
    */
   ScopeCapability_t scope_caps[NumberOfScopeType];
   Scope_t default_scope;   /* 默认作用域 */