Add scripts to produce APK files for Alpine Linux

cmake/APKBUILD.in

@@ -0,0 +1,54 @@
+# Contributor: Couchbase SDK Team <support@couchbase.com>
+# Maintainer: Couchbase SDK Team <support@couchbase.com>
+
+pkgname=couchbase-cxx-client
+pkgver=@COUCHBASE_CXX_CLIENT_PACKAGE_VERSION@
+pkgrel=1
+_number_of_commits=@COUCHBASE_CXX_CLIENT_NUMBER_OF_COMMITS@
+if [ "${_number_of_commits}" -gt 0 ]; then
+	pkgver="${pkgver}_p${_number_of_commits}"
+fi
+source="${pkgname}-${pkgver}.tar.gz"
+pkgdesc="Couchbase C++ SDK"
+url="https://docs.couchbase.com/cxx-sdk/current/hello-world/overview.html"
+arch="all"
+license="Apache-2.0"
+depends=""
+makedepends="
+	linux-headers
+	cmake
+	ninja
+"
+subpackages="${pkgname}-dev ${pkgname}-tools"
+options="!check"
+
+unpack() {
+	(cd "${srcdir}"; tar -xzf "${source}" --strip-components=1)
+}
+
+build() {
+	cmake -B apk-build -S "${srcdir}" -G Ninja \
+		-DCMAKE_INSTALL_PREFIX=/usr \
+		-DCMAKE_BUILD_TYPE=MinSizeRel \
+		-DBUILD_SHARED_LIBS=OFF \
+		-DCOUCHBASE_CXX_CLIENT_PKGCONFIG_VERSION="${pkgver}" \
+		-DCOUCHBASE_CXX_CLIENT_INSTALL=ON \
+		-DCOUCHBASE_CXX_CLIENT_STATIC_BORINGSSL=ON \
+		-DCOUCHBASE_CXX_CLIENT_BUILD_EXAMPLES=OFF \
+		-DCOUCHBASE_CXX_CLIENT_BUILD_TESTS=OFF \
+		-DCOUCHBASE_CXX_CLIENT_BUILD_TOOLS=ON \
+		-DCOUCHBASE_CXX_CLIENT_BUILD_STATIC=OFF \
+		-DCOUCHBASE_CXX_CLIENT_BUILD_SHARED=ON
+	cmake --build apk-build
+}
+
+tools() {
+	pkgdesc="${pkgdesc} (tools)"
+	depends="${pkgname}=${pkgver}-r${pkgrel}"
+
+	amove usr/bin
+}
+
+package() {
+	DESTDIR="${pkgdir}" cmake --install apk-build
+}

cmake/Packaging.cmake

@@ -4,6 +4,7 @@ include(CMakePackageConfigHelpers)
 install(DIRECTORY ${PROJECT_SOURCE_DIR}/couchbase DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 install(FILES LICENSE.txt DESTINATION ${CMAKE_INSTALL_DOCDIR})
 
+set(COUCHBASE_CXX_CLIENT_PKGCONFIG_VERSION "${COUCHBASE_CXX_CLIENT_SEMVER}" CACHE STRING "The version to use in couchbase_cxx_client.pc")
 configure_file(${PROJECT_SOURCE_DIR}/cmake/couchbase_cxx_client.pc.in
                ${PROJECT_BINARY_DIR}/packaging/couchbase_cxx_client.pc @ONLY)
 install(FILES ${PROJECT_BINARY_DIR}/packaging/couchbase_cxx_client.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
@@ -280,3 +281,50 @@ if(COUCHBASE_CXX_CLIENT_RPM_TARGETS)
   # add target that depends on the last root
   add_custom_target(packaging_rpm DEPENDS ${last_output})
 endif()
+
+option(COUCHBASE_CXX_CLIENT_APK_TARGETS "Enable targets for building APKs (for Alpine Linux)" FALSE)
+if(COUCHBASE_CXX_CLIENT_APK_TARGETS)
+  find_program(ABUILD abuild REQUIRED) # apk add alpine-sdk
+
+  set(COUCHBASE_CXX_CLIENT_TARBALL_NAME_ALPINE "${COUCHBASE_CXX_CLIENT_TARBALL_NAME}")
+  set(COUCHBASE_CXX_CLIENT_TARBALL_ALPINE
+      "${PROJECT_BINARY_DIR}/packaging/${COUCHBASE_CXX_CLIENT_TARBALL_NAME_ALPINE}.tar.gz")
+  if(${COUCHBASE_CXX_CLIENT_NUMBER_OF_COMMITS} GREATER 0)
+    set(COUCHBASE_CXX_CLIENT_TARBALL_NAME_ALPINE
+        "couchbase-cxx-client-${COUCHBASE_CXX_CLIENT_PACKAGE_VERSION}_p${COUCHBASE_CXX_CLIENT_NUMBER_OF_COMMITS}")
+    set(COUCHBASE_CXX_CLIENT_TARBALL_ALPINE
+        "${PROJECT_BINARY_DIR}/packaging/${COUCHBASE_CXX_CLIENT_TARBALL_NAME_ALPINE}.tar.gz")
+  endif()
+
+  set(cxxcbc_apkbuild_file "${PROJECT_BINARY_DIR}/packaging/APKBUILD")
+  configure_file(${PROJECT_SOURCE_DIR}/cmake/APKBUILD.in "${cxxcbc_apkbuild_file}" @ONLY)
+
+  if(NOT
+     "${COUCHBASE_CXX_CLIENT_TARBALL}"
+     STREQUAL
+     "${COUCHBASE_CXX_CLIENT_TARBALL_ALPINE}")
+    add_custom_command(
+      OUTPUT ${COUCHBASE_CXX_CLIENT_TARBALL_ALPINE}
+      WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/packaging"
+      COMMAND ${CMAKE_COMMAND} -E copy "${COUCHBASE_CXX_CLIENT_TARBALL}" "${COUCHBASE_CXX_CLIENT_TARBALL_ALPINE}"
+      DEPENDS ${COUCHBASE_CXX_CLIENT_TARBALL})
+  endif()
+
+  set(cxxcbc_apkbuild_checksum "${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_ALPINE} ${cxxcbc_apkbuild_file})
+
+  set(cxxcbc_apkbuild_timestamp "${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_ALPINE} ${cxxcbc_apkbuild_checksum})
+
+  add_custom_target(packaging_apk DEPENDS ${cxxcbc_apkbuild_timestamp})
+endif()

cmake/VersionInfo.cmake

@@ -58,6 +58,7 @@ string(REGEX REPLACE "T.*" "" COUCHBASE_CXX_CLIENT_BUILD_DATE "${COUCHBASE_CXX_C
 set(COUCHBASE_CXX_CLIENT_SEMVER "${couchbase_cxx_client_VERSION}")
 set(COUCHBASE_CXX_CLIENT_PACKAGE_VERSION "${couchbase_cxx_client_VERSION}")
 set(COUCHBASE_CXX_CLIENT_PACKAGE_RELEASE "${couchbase_cxx_client_BUILD_NUMBER}")
+set(COUCHBASE_CXX_CLIENT_NUMBER_OF_COMMITS 0)
 if(COUCHBASE_CXX_CLIENT_GIT_DESCRIBE MATCHES
    "^([0-9]+\\.[0-9]+\\.[0-9]+)(-([a-zA-Z0-9\\.]+))?(-([0-9]+)-g([a-zA-Z0-9]+))?$")
   set(COUCHBASE_CXX_CLIENT_SEMVER "${CMAKE_MATCH_1}")
@@ -67,6 +68,7 @@ if(COUCHBASE_CXX_CLIENT_GIT_DESCRIBE MATCHES
     set(COUCHBASE_CXX_CLIENT_PACKAGE_RELEASE "${CMAKE_MATCH_3}.${couchbase_cxx_client_BUILD_NUMBER}")
   endif()
   if(CMAKE_MATCH_5 AND CMAKE_MATCH_5 GREATER 0) # number_of_commits.build_number.sha1
+    set(COUCHBASE_CXX_CLIENT_NUMBER_OF_COMMITS ${CMAKE_MATCH_5})
     set(COUCHBASE_CXX_CLIENT_SEMVER
         "${COUCHBASE_CXX_CLIENT_SEMVER}+${CMAKE_MATCH_5}.${couchbase_cxx_client_BUILD_NUMBER}.${CMAKE_MATCH_6}")
     if(CMAKE_MATCH_3) # pre-release

cmake/couchbase_cxx_client.pc.in

@@ -3,8 +3,8 @@ exec_prefix=@CMAKE_INSTALL_PREFIX@
 includedir=@CMAKE_INSTALL_PREFIX@/include
 libdir=@CMAKE_INSTALL_LIBDIR@
 
-Name: couchbase-cxx-client @COUCHBASE_CXX_CLIENT_SEMVER@
+Name: couchbase-cxx-client @COUCHBASE_CXX_CLIENT_PKGCONFIG_VERSION@
 Description: Couchbase C++ SDK
-Version: @COUCHBASE_CXX_CLIENT_SEMVER@
+Version: @COUCHBASE_CXX_CLIENT_PKGCONFIG_VERSION@
 Libs: -L${libdir} -lcouchbase_cxx_client
 Cflags: -I${includedir}