Add scripts to produce APK files for Alpine Linux

cmake/APKBUILD.in

@@ -0,0 +1,44 @@
+# Contributor: Couchbase SDK Team <[email protected]>
+# Maintainer: Couchbase SDK Team <[email protected]>
+pkgname=couchbase-cxx-client
+pkgver=@COUCHBASE_CXX_CLIENT_PACKAGE_VERSION@
+pkgrel=@COUCHBASE_CXX_CLIENT_PACKAGE_RELEASE@
+pkgdesc="Couchbase C++ SDK"
+url="https://docs.couchbase.com/cxx-sdk/current/hello-world/overview.html"
+arch="all"
+license="Apache-2.0"
+depends=""
+makedepends="
+    linux-headers
+	cmake
+	ninja
+"
+subpackages="$pkgname-dev $pkgname-tools"
+source="$pkgname-$pkgver.tar.gz"
+options="!check"
+
+build() {
+	cmake -B build -G Ninja \
+		-DCMAKE_INSTALL_PREFIX=/usr \
+		-DCMAKE_BUILD_TYPE=MinSizeRel \
+		-DBUILD_SHARED_LIBS=OFF \
+		-DCOUCHBASE_CXX_CLIENT_INSTALL=ON \
+		-DCOUCHBASE_CXX_CLIENT_STATIC_BORINGSSL=ON \
+		-DCOUCHBASE_CXX_CLIENT_BUILD_EXAMPLES=OFF \
+		-DCOUCHBASE_CXX_CLIENT_BUILD_TESTS=OFF \
+		-DCOUCHBASE_CXX_CLIENT_BUILD_TOOLS=ON \
+		-DCOUCHBASE_CXX_CLIENT_BUILD_STATIC=OFF \
+		-DCOUCHBASE_CXX_CLIENT_BUILD_SHARED=ON
+	cmake --build build
+}
+
+tools() {
+	pkgdesc="$pkgdesc (tools)"
+	depends="$pkgname=$pkgver-r$pkgrel"
+
+	amove usr/bin
+}
+
+package() {
+	DESTDIR="$pkgdir" cmake --install build
+}

cmake/Packaging.cmake

@@ -280,3 +280,29 @@ if(COUCHBASE_CXX_CLIENT_RPM_TARGETS)
   # add target that depends on the last root
   add_custom_target(packaging_rpm DEPENDS ${last_output})
 endif()
+
+option(COUCHBASE_CXX_CLIENT_APK_TARGETS "Enable targets for building APKs (for Alpine Linux)" FALSE)
+if(COUCHBASE_CXX_CLIENT_APK_TARGETS)
+  find_program(ABUILD abuild REQUIRED) # apk add alpine-sdk
+
+  set(cxxcbc_apkbuild_file "${PROJECT_BINARY_DIR}/packaging/APKBUILD")
+  configure_file(${PROJECT_SOURCE_DIR}/cmake/APKBUILD.in "${cxxcbc_apkbuild_file}" @ONLY)
+
+  set(cxxcbc_apkbuild_checksum "${PROJECT_BINARY_DIR}/packaging/apk_checksum_updated.txt")
+  add_custom_command(
+    OUTPUT ${cxxcbc_apkbuild_checksum}
+    WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/packaging"
+    COMMAND ${ABUILD} checksum
+    COMMAND touch ${cxxcbc_apkbuild_checksum}
+    DEPENDS ${COUCHBASE_CXX_CLIENT_TARBALL} ${cxxcbc_apkbuild_file})
+
+  set(cxxcbc_apkbuild_timestamp "${PROJECT_BINARY_DIR}/packaging/apk_timestamp.txt")
+  add_custom_command(
+    OUTPUT ${cxxcbc_apkbuild_timestamp}
+    WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/packaging"
+    COMMAND ${ABUILD} -r
+    COMMAND touch ${cxxcbc_apkbuild_timestamp}
+    DEPENDS ${COUCHBASE_CXX_CLIENT_TARBALL} ${cxxcbc_apkbuild_checksum})
+
+  add_custom_target(packaging_apk DEPENDS ${cxxcbc_apkbuild_timestamp})
+endif()