feat: merger

taskfile/ast/taskfile.go

@@ -1,6 +1,7 @@
 package ast
 
 import (
+	"errors"
 	"fmt"
 	"time"
 
@@ -13,6 +14,9 @@ const NamespaceSeparator = ":"
 
 var V3 = semver.MustParse("3")
 
+// ErrIncludedTaskfilesCantHaveDotenvs is returned when a included Taskfile contains dotenvs
+var ErrIncludedTaskfilesCantHaveDotenvs = errors.New("task: Included Taskfiles can't have dotenv declarations. Please, move the dotenv declaration to the main Taskfile")
+
 // Taskfile is the abstract syntax tree for a Taskfile
 type Taskfile struct {
 	Location string
@@ -36,6 +40,9 @@ func (t1 *Taskfile) Merge(t2 *Taskfile, include *Include) error {
 	if !t1.Version.Equal(t2.Version) {
 		return fmt.Errorf(`task: Taskfiles versions should match. First is "%s" but second is "%s"`, t1.Version, t2.Version)
 	}
+	if len(t2.Dotenv) > 0 {
+		return ErrIncludedTaskfilesCantHaveDotenvs
+	}
 	if t2.Output.IsSet() {
 		t1.Output = t2.Output
 	}