fix: Print dotenv file path when there is an error reading file

Fixes #1261.

task_test.go

@@ -1657,6 +1657,18 @@ func TestDotenvHasEnvVarInPath(t *testing.T) {
  tt.Run(t)
 }
 
+func TestTaskDotenvParseErrorMessage(t *testing.T) {
+ e := task.Executor{
+ Dir: "testdata/dotenv/parse_error",
+ }
+
+ path, _ := filepath.Abs(filepath.Join(e.Dir, ".env-with-error"))
+ expected := fmt.Sprintf("error reading env file %s:", path)
+
+ err := e.Setup()
+ require.ErrorContains(t, err, expected)
+}
+
 func TestTaskDotenv(t *testing.T) {
  tt := fileContentTest{
  Dir: "testdata/dotenv_task/default",

taskfile/dotenv.go

@@ -1,6 +1,7 @@
 package taskfile
 
 import (
+ "fmt"
  "os"
 
  "github.com/joho/godotenv"
@@ -37,7 +38,7 @@ func Dotenv(c *compiler.Compiler, tf *ast.Taskfile, dir string) (*ast.Vars, erro
 
  envs, err := godotenv.Read(dotEnvPath)
  if err != nil {
- return nil, err
+ return nil, fmt.Errorf("error reading env file %s: %w", dotEnvPath, err)
  }
  for key, value := range envs {
  if ok := env.Exists(key); !ok {

testdata/dotenv/parse_error/.env-with-error

@@ -0,0 +1,2 @@
+#intentional parse error
+SOME_VAR

testdata/dotenv/parse_error/Taskfile.yml

@@ -0,0 +1,8 @@
+version: '3'
+
+dotenv: ['.env-with-error']
+
+tasks:
+ default:
+ cmd: "true"
+