filter empty lines in env file

go.mod

@@ -1,3 +1,5 @@
-module git.tordarus.net/tordarus/i3-wrapper
+module git.milar.in/milarin/i3-wrapper
 
-go 1.17
+go 1.18
+
+require git.milar.in/milarin/slices v0.0.6 // indirect

go.sum

@@ -0,0 +1,2 @@
+git.milar.in/milarin/slices v0.0.6 h1:AQoSarZ58WHYol9c6woWJSe8wFpPC2RC4cvIlZpfg9s=
+git.milar.in/milarin/slices v0.0.6/go.mod h1:NOr53AOeur/qscu/FBj3lsFR262PNYBccLYSTCAXRk4=

main.go

@@ -3,13 +3,14 @@ package main
 import (
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"os/signal"
 	"path/filepath"
 	"strings"
 	"syscall"
+
+	"git.milar.in/milarin/slices"
 )
 
 var (
@@ -49,8 +50,8 @@ func main() {
 		cmd.Stderr = os.Stderr
 
 		cmd.Env = os.Environ()
-		if envData, err := ioutil.ReadFile(os.ExpandEnv(*envFile)); err == nil {
-			cmd.Env = append(cmd.Env, strings.Split(string(envData), "\n")...)
+		if envData, err := os.ReadFile(os.ExpandEnv(*envFile)); err == nil {
+			cmd.Env = append(cmd.Env, slices.Filter(strings.Split(string(envData), "\n"), IsNotEmpty)...)
 		} else {
 			fmt.Println(err)
 		}
@@ -71,3 +72,7 @@ func main() {
 		}
 	}
 }
+
+func IsNotEmpty(str string) bool {
+	return len(strings.TrimSpace(str)) > 0
+}