feat: support package_maps config parse and add unit test cases.

Signed-off-by: peefy <xpf6677@163.com>

pkg/settings/a_test_unix.go

@@ -19,6 +19,8 @@ kcl_cli_configs:
     - ${KCL_MOD}/file2.k
     - ../../base/base.k
   disable_none: false
+  package_maps:
+    k8s: ../vendor/k8s
 `
 	f, err := LoadFile("./sub/settings.yaml", []byte(s))
 	if err != nil {
@@ -33,6 +35,8 @@ kcl_cli_configs:
 	tAssertEQ(t, x.KFilenameList[1], filepath.Join(pwd, "sub", "sub_main.k"))
 	tAssertEQ(t, x.KFilenameList[2], filepath.Join(pwd, "file2.k"))
 	tAssertEQ(t, x.KFilenameList[3], filepath.Join(pwd, "..", "base", "base.k"))
+	tAssertEQ(t, x.ExternalPkgs[1].PkgName, "k8s")
+	tAssertEQ(t, x.ExternalPkgs[1].PkgPath, "../vendor/k8s")
 }
 
 func tAssertEQ(t *testing.T, x, y interface{}) {

pkg/settings/utils_settings_yaml.go

@@ -29,11 +29,13 @@ type ConfigStruct struct {
 	Overrides    []string `yaml:"overrides"`
 	PathSelector []string `yaml:"path_selector"`
 
-	StrictRangeCheck bool `yaml:"strict_range_check"`
-	DisableNone      bool `yaml:"disable_none"`
-	Verbose          int  `yaml:"verbose"`
-	Debug            bool `yaml:"debug"`
+	StrictRangeCheck bool              `yaml:"strict_range_check"`
+	DisableNone      bool              `yaml:"disable_none"`
+	Verbose          int               `yaml:"verbose"`
+	Debug            bool              `yaml:"debug"`
+	PackageMaps      map[string]string `yaml:"package_maps"`
 }
+
 type KeyValueStruct struct {
 	Key   string      `yaml:"key"`
 	Value interface{} `yaml:"value"`
@@ -174,6 +176,15 @@ func (settings *SettingsFile) To_ExecProgram_Args() *gpyrpc.ExecProgram_Args {
 		})
 	}
 
+	// kcl -E k8s=../vendor/k8s
+	for name, path := range settings.Config.PackageMaps {
+		externalPkg := gpyrpc.CmdExternalPkgSpec{
+			PkgName: name,
+			PkgPath: path,
+		}
+		args.ExternalPkgs = append(args.ExternalPkgs, &externalPkg)
+	}
+
 	return args
 }