Properly handle ALSA using ALSA_PLUGIN_DIR

[probonopd]

go-appimage/src/appimagetool/appdirtool.go

Lines 268 to 287 in b3760f0

	// ALSA
	// FIXME: Doesn't seem to get loaded. Is ALSA_PLUGIN_DIR needed and working in ALSA?
	// Is something like https://github.com/flatpak/freedesktop-sdk-images/blob/1.6/alsa-lib-plugin-path.patch needed in the bundled ALSA?
	// TODO: What about the `share/alsa` subdirectory? libasound.so.* refers to it as well
	for _, lib := range allELFs {
	if strings.HasPrefix(filepath.Base(lib), "libasound.so") {
	log.Println("Bundling alsa-lib directory (for <tbd>)...")
	locs, err := findWithPrefixInLibraryLocations("alsa-lib")
	if err != nil {
	log.Println("Could not find alsa-lib directory")
	log.Println("E.g., in Alpine Linux: apk add alsa-plugins alsa-plugins-pulse")
	os.Exit(1)
	} else {
	log.Println("Bundling dependencies of alsa-lib directory...")
	determineELFsInDirTree(appdir, locs[0])
	}
	break
	}
	}

A change was committed to ALSA master:
alsa-project/alsa-lib#34 (comment)

• alsa-project/alsa-lib@b2a4272
• alsa-project/alsa-lib@33089f3

So we should see whether we can make it work now using ALSA master.

[probonopd]

Some trickery used in

https://github.com/probonopd/doesemu2-factory/blob/4844ed18ba574bfb76071a32e39b61c9f6adbab6/build.sh#L91-L95

# ALSA patching... don't ask ;-)
find appdir/usr/lib -type f -exec sed -i -e 's|/usr|././|g' {} \;
mkdir -p appdir/usr/share/
( cd appdir/usr/share/ ; ln -s /usr/share/alsa . )
( cd appdir/usr/lib/alsa-lib ; ln -s ../ lib )

Is there a better way?

Reference:#

• find the way to package DOS programs/games dosemu2/dosemu2#2133 (comment)