fix: propagate include vars in multi-level includes

task_test.go

@@ -1798,6 +1798,29 @@ VAR_2 is included-default-var2
 	assert.Equal(t, strings.TrimSpace(buff.String()), expectedOutputOrder)
 }
 
+func TestIncludedVarsMultiLevel(t *testing.T) {
+	const dir = "testdata/include_with_vars_multi_level"
+	var buff bytes.Buffer
+	e := task.Executor{
+		Dir:    dir,
+		Stdout: &buff,
+		Stderr: &buff,
+	}
+	require.NoError(t, e.Setup())
+
+	expectedOutputOrder := strings.TrimSpace(`
+task: [lib:greet] echo 'Hello world'
+Hello world
+task: [foo:lib:greet] echo 'Hello foo'
+Hello foo
+task: [bar:lib:greet] echo 'Hello bar'
+Hello bar
+`)
+	require.NoError(t, e.Run(context.Background(), taskfile.Call{Task: "default"}))
+	t.Log(buff.String())
+	assert.Equal(t, strings.TrimSpace(buff.String()), expectedOutputOrder)
+}
+
 func TestErrorCode(t *testing.T) {
 	const dir = "testdata/error_code"
 

taskfile/read/taskfile.go

@@ -149,7 +149,10 @@ func Taskfile(readerNode *ReaderNode) (*taskfile.Taskfile, string, error) {
 
 			for _, task := range includedTaskfile.Tasks.Values() {
 				task.Dir = filepathext.SmartJoin(dir, task.Dir)
-				task.IncludeVars = includedTask.Vars
+				if task.IncludeVars == nil {
+					task.IncludeVars = &taskfile.Vars{}
+				}
+				task.IncludeVars.Merge(includedTask.Vars)
 				task.IncludedTaskfileVars = includedTaskfile.Vars
 				task.IncludedTaskfile = &includedTask
 			}

testdata/include_with_vars_multi_level/Taskfile.yml

@@ -0,0 +1,17 @@
+version: "3"
+
+includes:
+  lib:
+    taskfile: lib/Taskfile.yml
+    internal: true
+  foo:
+    taskfile: foo/Taskfile.yml
+  bar:
+    taskfile: bar/Taskfile.yml
+
+tasks:
+  default:
+    cmds:
+      - task: lib:greet
+      - task: foo:lib:greet
+      - task: bar:lib:greet

testdata/include_with_vars_multi_level/bar/Taskfile.yml

@@ -0,0 +1,7 @@
+version: "3"
+
+includes:
+  lib:
+    taskfile: ../lib/Taskfile.yml
+    vars:
+      RECEIVER: "bar"

testdata/include_with_vars_multi_level/foo/Taskfile.yml

@@ -0,0 +1,7 @@
+version: "3"
+
+includes:
+  lib:
+    taskfile: ../lib/Taskfile.yml
+    vars:
+      RECEIVER: "foo"

testdata/include_with_vars_multi_level/lib/Taskfile.yml

@@ -0,0 +1,9 @@
+version: "3"
+
+vars:
+  RECEIVER: "world"
+
+tasks:
+  greet:
+    cmds:
+      - echo 'Hello {{.RECEIVER}}'