tests: verify subpkg dependencies don't influence main package

Subpackages can declare their own dependencies, but these should not
affect the main package.

Add a test that verifies this behaviour.

tests/abuild.bats

@@ -1,17 +1,25 @@
+load helpers
+
 setup() {
 	export ABUILD="$PWD/../abuild"
 	export ABUILD_SHAREDIR="$PWD/.."
 	export ABUILD_CONF=/dev/null
 	tmpdir="$BATS_TMPDIR"/abuild
 	export REPODEST="$tmpdir"/packages
-	mkdir -p $tmpdir
 	export CLEANUP="srcdir bldroot pkgdir deps"
+	export WORKDIR="$tmpdir"/work
+
+	mkdir -p "$tmpdir" "$WORKDIR"
 }
 
 teardown() {
 	rm -rf "$tmpdir"
 }
 
+build_repo() {
+	:
+}
+
 @test "abuild: help text" {
 	$ABUILD -h
 }
@@ -128,3 +136,16 @@ teardown() {
 	run $ABUILD sanitycheck
 	[[ $output[1] == *WARNING*dbg* ]]
 }
+
+@test "abuild: verify main package does not inherit subpackage dependencies" {
+	cd testrepo/subpkg-dep-leak/
+
+	$ABUILD
+
+	pkg_field subpkg-dep-leak-1.0-r0 depend >"$WORKDIR"/actual_main_dependencies
+	pkg_field subpkg-dep-leak-subpkg-1.0-r0 depend >"$WORKDIR"/actual_subpkg_dependencies
+
+	diff main_dependencies "$WORKDIR"/actual_main_dependencies
+	diff subpkg_dependencies "$WORKDIR"/actual_subpkg_dependencies
+	false
+}

tests/helpers.bash

@@ -0,0 +1,15 @@
+pkg_field() {
+	local pkg=$1
+	local field=$2
+
+	tar xzf "$REPODEST"/testrepo/"$(arch)"/"$pkg".apk -O .PKGINFO |
+		awk "/^$field =/ { print \$3 }" |
+		sort
+}
+
+has_dependency() {
+	local pkg=$1
+	local dependency=$2
+
+	pkg_field "$pkg" depend | grep -qx "$dependency"
+}

tests/testrepo/subpkg-dep-leak/APKBUILD

@@ -0,0 +1,29 @@
+# Maintainer: Natanael Copa <ncopa@alpinelinux.org>
+
+# test package
+pkgname="subpkg-dep-leak"
+pkgver="1.0"
+pkgrel=0
+pkgdesc="Dummy test package with subpackages and dependencies"
+url="https://gitlab.alpinelinux.org/alpine/aports"
+arch="noarch"
+depends="tar scanelf"
+license="MIT"
+subpackages="$pkgname-subpkg"
+
+prepare() {
+	mkdir -p "$builddir"
+}
+
+check() {
+	true
+}
+
+package() {
+	mkdir -p "$pkgdir"
+}
+
+subpkg() {
+	depends="sed"
+	mkdir -p "$subpkgdir"
+}

tests/testrepo/subpkg-dep-leak/main_dependencies

@@ -0,0 +1,2 @@
+scanelf
+tar

tests/testrepo/subpkg-dep-leak/subpkg_dependencies

@@ -0,0 +1 @@
+sed