abuild: allow options to only effect specific packages

This is sometimes needed for options like !tracedeps which needs to only
apply to a specific subpackage in some cases.

Ref https://gitlab.alpinelinux.org/alpine/aports/-/issues/16632#note_458449

abuild.in

@@ -1845,7 +1845,7 @@ create_apks() {
 		size=$(pkginfo_val size "$file")
 		local apk=$name-$ver.apk
 		local datadir="$pkgbasedir"/$name
-		local subpkgname=$name
+		subpkgname=$name
 		subpkgarch=$(pkginfo_val arch "$file")
 
 		# See https://gitlab.alpinelinux.org/alpine/tsc/-/issues/16
@@ -2734,6 +2734,8 @@ deplist_has() {
 }
 
 options_has() {
+	[ -n "${subpkgname:-pkgname}" ] &&
+	list_has "${subpkgname:-pkgname}:$1" $options ||
 	list_has "$1" $options
 }
 

tests/abuild_test

@@ -1196,9 +1196,8 @@ abuild_command_provides_body() {
 		url="https://gitlab.alpinelinux.org/alpine/aports"
 		arch="noarch"
 		license="MIT"
-		prepare() { mkdir -p "\$builddir"; }
-		build() { true; }
-		check() { true; }
+		subpackages="noprovides"
+		options="noprovides:!tracedeps"
 		package() {
 			mkdir -p "\$pkgdir/usr/bin"
 			printf "%s\n" '#!/bin/sh' >"\$pkgdir/usr/bin/foo"
@@ -1207,6 +1206,12 @@ abuild_command_provides_body() {
 			mkdir -p "\$pkgdir/usr/bin/dir/"
 			ln -s /usr/bin/not-on-the-host-system-but-in-a-dependency "\$pkgdir/usr/bin/link"
 		}
+
+		noprovides() {
+			mkdir -p "\$subpkgdir/usr/bin"
+			printf "%s\n" '#!/bin/sh' >"\$subpkgdir/usr/bin/foo"
+			chmod +x "\$subpkgdir/usr/bin/foo"
+		}
 	EOF
 	abuild rootpkg
 
@@ -1216,6 +1221,10 @@ abuild_command_provides_body() {
 		-o match:"provides = cmd:link=1.0-r0" \
 		-o not-match:"provides = cmd:dir=1.0-r0" \
 		grep '^provides = ' pkg/.control.testprovides/.PKGINFO
+
+	atf_check -s exit:1 \
+		-o not-match:"provides" \
+		grep '^provides = ' pkg/.control.noprovides/.PKGINFO
 }
 
 abuild_gocache_dir_body() {