Do not output empty 'libraries:' field if not needed in sketch.yaml

Author: cmaglie

internal/arduino/sketch/profiles.go

@@ -187,6 +187,9 @@ type ProfileRequiredLibraries []*ProfileLibraryReference
 
 // AsYaml outputs the required libraries as Yaml
 func (p *ProfileRequiredLibraries) AsYaml() string {
+	if len(*p) == 0 {
+		return ""
+	}
 	res := "    libraries:\n"
 	for _, lib := range *p {
 		res += lib.AsYaml()

internal/arduino/sketch/profiles_test.go

@@ -16,7 +16,6 @@
 package sketch
 
 import (
-	"fmt"
 	"testing"
 
 	"github.com/arduino/go-paths-helper"
@@ -28,7 +27,6 @@ func TestProjectFileLoading(t *testing.T) {
 		sketchProj := paths.New("testdata", "SketchWithProfiles", "sketch.yml")
 		proj, err := LoadProjectFile(sketchProj)
 		require.NoError(t, err)
-		fmt.Println(proj)
 		golden, err := sketchProj.ReadFile()
 		require.NoError(t, err)
 		require.Equal(t, proj.AsYaml(), string(golden))
@@ -37,7 +35,6 @@ func TestProjectFileLoading(t *testing.T) {
 		sketchProj := paths.New("testdata", "SketchWithDefaultFQBNAndPort", "sketch.yml")
 		proj, err := LoadProjectFile(sketchProj)
 		require.NoError(t, err)
-		fmt.Println(proj)
 		golden, err := sketchProj.ReadFile()
 		require.NoError(t, err)
 		require.Equal(t, proj.AsYaml(), string(golden))

internal/arduino/sketch/testdata/SketchWithProfiles/sketch.yml

@@ -9,6 +9,12 @@ profiles:
       - Arduino_ConnectionHandler (0.6.4)
       - TinyDHT sensor library (1.1.0)
 
+  nanorp_nolib:
+    fqbn: arduino:mbed_nano:nanorp2040connect
+    programmer: p1
+    platforms:
+      - platform: arduino:mbed_nano (2.1.0)
+
   another_profile_name:
     notes: testing the limit of the AVR platform, may be unstable
     fqbn: arduino:avr:uno