libmakepkg: Add lzip ext support

lzip is a lossless data compressor designed to replace gzip and bzip2 as
the standard general-purpose compressed format.
- add .lz (lzip) support to libmakepkg/util/compress.sh:compress_as
- add COMPRESSLZ to makepkg.conf.in
- document COMPRESSLZ
- document PKGEXT with `.tar.lz`

Signed-off-by: Chloe Kudryavtsev <toast@toastin.space>
Signed-off-by: Allan McRae <allan@archlinux.org>

doc/makepkg.conf.5.asciidoc

@@ -254,13 +254,14 @@ Options
 **COMPRESSLRZ=**"(lrzip -q)"::
 **COMPRESSLZ4=**"(lz4 -q)"::
 **COMPRESSZ=**"(compress -c -f)"::
+**COMPRESSLZ=**"(lzip -c -f)"::
 	Sets the command and options used when compressing compiled or source
 	packages in the named format.
 
 **PKGEXT=**".pkg.tar.gz", **SRCEXT=**".src.tar.gz"::
 	Sets the compression used when making compiled or source packages.
 	Valid suffixes are `.tar`, `.tar.gz`, `.tar.bz2`, `.tar.xz`, `.tar.zst`,
-	`.tar.lzo`, `.tar.lrz`, `.tar.lz4`, and `.tar.Z`.
+	`.tar.lzo`, `.tar.lrz`, `.tar.lz4`, `.tar.lz` and `.tar.Z`.
 	Do not touch these unless you know what you are doing.
 
 

etc/makepkg.conf.in

@@ -135,6 +135,7 @@ COMPRESSLRZ=(lrzip -q)
 COMPRESSLZO=(lzop -q)
 COMPRESSZ=(compress -c -f)
 COMPRESSLZ4=(lz4 -q)
+COMPRESSLZ=(lzip -c -f)
 
 #########################################################################
 # EXTENSION DEFAULTS

scripts/libmakepkg/util/compress.sh.in

@@ -42,6 +42,7 @@ compress_as() {
 		*tar.lzo) ${COMPRESSLZO[@]:-lzop -q} ;;
 		*tar.Z)   ${COMPRESSZ[@]:-compress -c -f} ;;
 		*tar.lz4) ${COMPRESSLZ4[@]:-lz4 -q} ;;
+		*tar.lz)  ${COMPRESSLZ[@]:-lzip -c -f} ;;
 		*tar)     cat ;;
 		*) warning "$(gettext "'%s' is not a valid archive extension.")" \
 			"$ext"; cat ;;