From 945c72cf6cbb4bd94d8079378074e1384857c973 Mon Sep 17 00:00:00 2001
From: Andrey Nering <andrey@nering.com.br>
Date: Sat, 10 Jul 2021 19:46:53 -0300
Subject: [PATCH] Small optimization and bug fix: don't compute variables if
 not needed for `dotenv:`

Closes #517
---
 CHANGELOG.md            | 5 +++++
 taskfile/read/dotenv.go | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 81c36aa1..a71ae25c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## Unreleased
+
+- Small optimization and bug fix: don't compute variables if not needed for
+  `dotenv:` ([#517](https://github.com/go-task/task/issues/517)).
+
 ## v3.5.0 - 2021-07-04
 
 - Add support for interpolation in `dotenv:`
diff --git a/taskfile/read/dotenv.go b/taskfile/read/dotenv.go
index 8d8ffd00..0ce6fed4 100644
--- a/taskfile/read/dotenv.go
+++ b/taskfile/read/dotenv.go
@@ -12,6 +12,10 @@ import (
 )
 
 func Dotenv(c compiler.Compiler, tf *taskfile.Taskfile, dir string) (*taskfile.Vars, error) {
+	if len(tf.Dotenv) == 0 {
+		return nil, nil
+	}
+
 	vars, err := c.GetTaskfileVariables()
 	if err != nil {
 		return nil, err