abuild: implement getpkgver, default_fetch and default_unpack

to make life easier for volatile packages

abuild.in

@@ -178,7 +178,7 @@ is_remote() {
 	return 1
 }
 
-fetch() {
+default_fetch() {
 	local s
 	mkdir -p "$srcdir"
 	for s in $source; do
@@ -191,8 +191,12 @@ fetch() {
 	done
 }
 
+fetch() {
+	default_fetch
+}
+
 # unpack the sources
-unpack() {
+default_unpack() {
 	local u
 	md5check || return 1
 	mkdir -p "$srcdir"
@@ -216,6 +220,10 @@ unpack() {
 	done
 }
 
+unpack() {
+	default_unpack
+}
+
 # cleanup source and package dir
 clean() {
 	msg "Cleaning temporary build dirs..."
@@ -236,6 +244,7 @@ cleancache() {
 
 cleanpkg() {
 	local i
+	getpkgver || return 1
 	msg "Cleaning built packages..."
 	for i in $pkgname $subpackages; do
 		local p="${i%:*}-$pkgver-r$pkgrel"
@@ -248,6 +257,7 @@ cleanpkg() {
 # clean all packages except current
 cleanoldpkg() {
 	local i j
+	getpkgver || return 1
 	msg "Cleaning all packages except $pkgver-r$pkgrel..."
 	for i in $pkgname $subpackages; do
 		for j in "$PKGDEST"/${i%:*}-[0-9]*.apk; do
@@ -282,6 +292,14 @@ runpart() {
 }
 
 # override those in your build script
+getpkgver() {
+	# this func is supposed to be overridden by volatile packages
+	if [ "$pkgver" = "volatile" ]; then
+		error "Please provide a getpkgver() function in your APKBUILD"
+		return 1
+	fi
+}
+
 prepare() {
 	:
 }
@@ -315,6 +333,7 @@ prepare_subpackages() {
 }
 
 prepare_metafiles() {
+	getpkgver || return 1
 	local name=${subpkgname:-$pkgname}
 	[ -z "${name##* *}" ] && die "package name contains spaces"
 	local dir=${subpkgdir:-$pkgdir}
@@ -411,8 +430,7 @@ prepare_tracedeps() {
 prepare_package() {
 	msg "Preparing ${subpkgname:+sub}package ${subpkgname:-$pkgname}..."
 	stripbin
-	prepare_metafiles
-	prepare_tracedeps
+	prepare_metafiles && prepare_tracedeps
 }
 
 pkginfo_val() {
@@ -465,6 +483,7 @@ trace_apk_deps() {
 
 create_apks() {
 	local file
+	getpkgver || return 1
 	for file in "$pkgbasedir"/.control.*/.PKGINFO; do
 		local dir="${file%/.PKGINFO}"
 		local name=$(pkginfo_val pkgname $file)
@@ -635,6 +654,7 @@ rootpkg() {
 }
 
 srcpkg() {
+	getpkgver || return 1
 	local p="$pkgname-$pkgver-$pkgrel"
 	local prefix="${startdir##*/}"
 	local i files="$prefix/APKBUILD"
@@ -648,6 +668,7 @@ srcpkg() {
 
 # check if package is up to date
 apk_up2date() {
+	getpkgver || return 1
 	local pkg="$PKGDEST/$pkgname-$pkgver-r$pkgrel.apk"
 	local i s
 	cd "$startdir"
@@ -672,6 +693,7 @@ apk_up2date() {
 
 cache_up2date() {
 	local i apk
+	getpkgver || return 1
 	for i in $pkgname $subpackages; do
 		apk="${i%:*}-$pkgver-r$pkgrel.apk"
 		[ "$apkcache"/APKINDEX.tar.gz -nt "$apkcache"/$apk ] || return 1
@@ -842,6 +864,7 @@ stripbin() {
 # simply list target apks
 listpkg() {
 	local i 
+	getpkgver || return 1
 	for i in $pkgname $subpackages; do
 		echo "${i%:*}-$pkgver-r$pkgrel.apk"
 	done
@@ -909,6 +932,7 @@ install_has() {
 
 # install package after build
 post_add() {
+	getpkgver || return 1
 	local pkgf="$PKGDEST/$1-$pkgver-r$pkgrel.apk"
 	local deps i
 	if ! subpackages_has $1 && [ "$1" != "$pkgname" ]; then