makepkg: allow specifying compression options

Adds the ability to override the commands used to compressing
compiled and source packages.  This is useful for those wanting
to use alternative implementations of the compression tools or
non-default compression options.

Allan: documented options in man page

Signed-off-by: Allan McRae <allan@archlinux.org>

3 files changed, 18 insertions, 4 deletions

diff --git a/doc/makepkg.conf.5.txt b/doc/makepkg.conf.5.txt
index db1e6d53..5970946d 100644
--- a/doc/makepkg.conf.5.txt
+++ b/doc/makepkg.conf.5.txt
@@ -213,6 +213,10 @@ Options
 	This value is used when querying a package to see who was the builder.
 	It is recommended you change this to your name and email address.
 
+**COMPRESSGZ=**"(gzip -c -f -n)", **COMPRESSBZ2=**"(bzip2 -c -f)", **COMPRESSXZ=**"(xz -c -z -)", **COMPRESSZ=**"(compress -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. The
 	current valid suffixes are `.tar`, `.tar.gz`, `.tar.bz2`, `.tar.xz`, and
diff --git a/etc/makepkg.conf.in b/etc/makepkg.conf.in
index e9152c8b..6c87ea4c 100644
--- a/etc/makepkg.conf.in
+++ b/etc/makepkg.conf.in
@@ -107,6 +107,16 @@ PURGE_TARGETS=(usr/{,share}/info/dir .packlist *.pod)
 #GPGKEY=""
 
 #########################################################################
+# COMPRESSION DEFAULTS
+#########################################################################
+#
+COMPRESSGZ=(gzip -c -f -n)
+COMPRESSBZ2=(bzip2 -c -f)
+COMPRESSXZ=(xz -c -z -)
+COMPRESSZ=(compress -c -f)
+
+
+#########################################################################
 # EXTENSION DEFAULTS
 #########################################################################
 #
diff --git a/scripts/makepkg.sh.in b/scripts/makepkg.sh.in
index 6e7a5562..48f7f7ec 100644
--- a/scripts/makepkg.sh.in
+++ b/scripts/makepkg.sh.in
@@ -1294,10 +1294,10 @@ create_package() {
 	# Disable bsdtar compression and use gzip -n for now.
 	bsdtar -cf - $comp_files * |
 	case "$PKGEXT" in
-		*tar.gz)  gzip -c -f -n ;;
-		*tar.bz2) bzip2 -c -f ;;
-		*tar.xz)  xz -c -z - ;;
-		*tar.Z)   compress -c -f ;;
+		*tar.gz)  ${COMPRESSGZ[@]:-gzip -c -f -n} ;;
+		*tar.bz2) ${COMPRESSBZ2[@]:-bzip2 -c -f} ;;
+		*tar.xz)  ${COMPRESSXZ[@]:-xz -c -z -} ;;
+		*tar.Z)   ${COMPRESSZ[@]:-compress -c -f} ;;
 		*tar)     cat ;;
 		*) warning "$(gettext "'%s' is not a valid archive extension.")" \
 			"$PKGEXT"; cat ;;