abuild: add cmd:* providers for symlinks

abuild.in

@@ -1296,9 +1296,13 @@ prepare_command_provides() {
 	options_has "!tracedeps" && return 0
 	cd "$dir" || return 1
 	for i in bin/* sbin/* usr/bin/* usr/sbin/*; do
+		# We can't check symlinks properly with absolute paths,
+		# subpackages and dependencies so assume that they are commands
+		if ! [ -L "$i" ]; then
 			if ! [ -x "$i" ] || ! [ -f "$i" ]; then
 				continue
 			fi
+		fi
 		# exclude any provides: lines for commands that has '@' because '@'
 		# is used as seperator between command name and repository. This
 		# avoids potential conflicts

tests/abuild_test

@@ -1058,6 +1058,7 @@ abuild_command_provides_body() {
 			chmod +x "\$pkgdir/usr/bin/foo"
 			cp -a "\$pkgdir/usr/bin/foo" "\$pkgdir/usr/bin/foo@"
 			mkdir -p "\$pkgdir/usr/bin/dir/"
+			ln -s /bin/not-on-the-host-system-but-in-a-dependency "\$pkgdir/usr/bin/link"
 		}
 	EOF
 	abuild rootpkg
@@ -1065,6 +1066,7 @@ abuild_command_provides_body() {
 	atf_check \
 		-o match:"provides = cmd:foo=1.0-r0" \
 		-o not-match:"provides = cmd:foo@=1.0-r0" \
+		-o match:"provides = cmd:link=1.0-r0" \
 		-o not-match:"provides = cmd:dir=1.0-r0" \
 		grep '^provides = ' pkg/.control.testprovides/.PKGINFO
 }