Add check for existing Grub config before writing default (#329)

Itxaka · web-flow · commit 6a9ac574bb79 · 2025-07-24T12:23:02.000+02:00
diff --git a/pkg/ops/iso.go b/pkg/ops/iso.go
@@ -347,7 +347,12 @@ func (b *BuildISOAction) prepareBootArtifacts(isoDir string) error {
 	if err != nil {
 		return err
 	}
-	return os.WriteFile(filepath.Join(isoDir, constants.GrubPrefixDir, constants.GrubCfg), constants.GrubLiveBiosCfg, constants.FilePerm)
+	if _, exist := os.Stat(filepath.Join(isoDir, constants.GrubPrefixDir, constants.GrubCfg)); os.IsNotExist(exist) {
+		return os.WriteFile(filepath.Join(isoDir, constants.GrubPrefixDir, constants.GrubCfg), constants.GrubLiveBiosCfg, constants.FilePerm)
+	} else {
+		b.cfg.Logger.Logger.Warn().Msgf("Grub config already exists at %s, skipping using default one", filepath.Join(isoDir, constants.GrubPrefixDir, constants.GrubCfg))
+	}
+	return nil
 }
 
 func (b BuildISOAction) prepareISORoot(isoDir string, rootDir string) error {

Original file line number	Diff line number	Diff line change
`@@ -347,7 +347,12 @@ func (b *BuildISOAction) prepareBootArtifacts(isoDir string) error {`
`347`	`347`	`if err != nil {`
`348`	`348`	`return err`
`349`	`349`	`}`
`350`		`- return os.WriteFile(filepath.Join(isoDir, constants.GrubPrefixDir, constants.GrubCfg), constants.GrubLiveBiosCfg, constants.FilePerm)`
	`350`	`+ if _, exist := os.Stat(filepath.Join(isoDir, constants.GrubPrefixDir, constants.GrubCfg)); os.IsNotExist(exist) {`
	`351`	`+ return os.WriteFile(filepath.Join(isoDir, constants.GrubPrefixDir, constants.GrubCfg), constants.GrubLiveBiosCfg, constants.FilePerm)`
	`352`	`+ } else {`
	`353`	`+ b.cfg.Logger.Logger.Warn().Msgf("Grub config already exists at %s, skipping using default one", filepath.Join(isoDir, constants.GrubPrefixDir, constants.GrubCfg))`
	`354`	`+ }`
	`355`	`+ return nil`
`351`	`356`	`}`
`352`	`357`
`353`	`358`	`func (b BuildISOAction) prepareISORoot(isoDir string, rootDir string) error {`