write BootloaderExtraLines to config.txt

related to gokrazy/gokrazy#216

Author: stapelberg

go.mod

@@ -5,7 +5,7 @@ go 1.19
 require (
 	github.com/breml/rootcerts v0.2.10
 	github.com/donovanhide/eventsource v0.0.0-20210830082556-c59027999da0
-	github.com/gokrazy/internal v0.0.0-20231215075326-cb9424291086
+	github.com/gokrazy/internal v0.0.0-20231215141737-b4318213fb69
 	github.com/gokrazy/updater v0.0.0-20230215172637-813ccc7f21e2
 	github.com/google/go-cmp v0.5.9
 	github.com/google/renameio/v2 v2.0.0

go.sum

@@ -3,8 +3,8 @@ github.com/breml/rootcerts v0.2.10/go.mod h1:24FDtzYMpqIeYC7QzaE8VPRQaFZU5TIUDly
 github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/donovanhide/eventsource v0.0.0-20210830082556-c59027999da0 h1:C7t6eeMaEQVy6e8CarIhscYQlNmw5e3G36y7l7Y21Ao=
 github.com/donovanhide/eventsource v0.0.0-20210830082556-c59027999da0/go.mod h1:56wL82FO0bfMU5RvfXoIwSOP2ggqqxT+tAfNEIyxuHw=
-github.com/gokrazy/internal v0.0.0-20231215075326-cb9424291086 h1:i0QEXbhXFquF6YquA1r5PyXzIX+cFJy3mPKqF9nYpLo=
-github.com/gokrazy/internal v0.0.0-20231215075326-cb9424291086/go.mod h1:CIE3ta1pA9UGyV1BM6wSc9BvNIZTm6keFCy/ifi6PCw=
+github.com/gokrazy/internal v0.0.0-20231215141737-b4318213fb69 h1:v6WEQAZZtdqj/GOlbSuf6bDFRTPE2dfCHx9BEwajpyU=
+github.com/gokrazy/internal v0.0.0-20231215141737-b4318213fb69/go.mod h1:CIE3ta1pA9UGyV1BM6wSc9BvNIZTm6keFCy/ifi6PCw=
 github.com/gokrazy/updater v0.0.0-20230215172637-813ccc7f21e2 h1:kBY5R1tSf+EYZ+QaSrofLaVJtBqYsVNVBWkdMq3Smcg=
 github.com/gokrazy/updater v0.0.0-20230215172637-813ccc7f21e2/go.mod h1:PYOvzGOL4nlBmuxu7IyKQTFLaxr61+WPRNRzVtuYOHw=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=

internal/packer/write.go

@@ -131,6 +131,8 @@ func (p *Pack) writeConfig(fw *fat.Writer, src string) error {
 	if p.Cfg.SerialConsoleOrDefault() != "off" {
 		config = strings.ReplaceAll(config, "enable_uart=0", "enable_uart=1")
 	}
+	config += "\n"
+	config += strings.Join(p.Cfg.BootloaderExtraLines, "\n")
 	w, err := fw.File("/config.txt", time.Now())
 	if err != nil {
 		return err