caller_identity template function.

README.md

@@ -530,9 +530,17 @@ local must_env = std.native('must_env');
 
 #### Resolve AWS caller identity
 
-Note: This function is available only in Jsonnet.
+The `caller_identity` template function resolves the AWS caller identity.
 
-The `caller_identity` native function resolves the AWS caller identity.
+```json
+{
+  "Account": "{{ caller_identity.Account }}",
+  "Arn": "{{ caller_identity.Arn }}",
+  "UserId": "{{ caller_identity.UserId }}"
+}
+```
+
+The `caller_identity` native function also available in Jsonnet.
 
 ```jsonnet
 local caller = std.native('caller_identity')();

lambroll.go

@@ -130,6 +130,17 @@ func (c *CallerIdentity) JsonnetNativeFuncs(ctx context.Context) []*jsonnet.Nati
 	}
 }
 
+func (c *CallerIdentity) FuncMap(ctx context.Context) template.FuncMap {
+	return template.FuncMap{
+		"caller_identity": func() map[string]any {
+			if err := c.resolve(ctx); err != nil {
+				return nil
+			}
+			return c.data
+		},
+	}
+}
+
 // App represents lambroll application
 type App struct {
 	callerIdentity *CallerIdentity
@@ -250,6 +261,7 @@ func New(ctx context.Context, opt *Option) (*App, error) {
 		},
 	}
 	app.nativeFuncs = append(app.nativeFuncs, app.callerIdentity.JsonnetNativeFuncs(ctx)...)
+	app.loader.Funcs(app.callerIdentity.FuncMap(ctx))
 	return app, nil
 }
 

test/function.json

@@ -16,7 +16,7 @@
     "FunctionName": "{{ must_env `FUNCTION_NAME` }}",
     "FileSystemConfigs": [
         {
-            "Arn": "arn:aws:elasticfilesystem:ap-northeast-1:123456789012:access-point/fsap-04fc0858274e7dd9a",
+            "Arn": "arn:aws:elasticfilesystem:ap-northeast-1:{{ caller_identity.Account }}:access-point/fsap-04fc0858274e7dd9a",
             "LocalMountPath": "/mnt/lambda"
         }
     ],