build: install() rules + CPack for reproducible packages

[Admnwk]

What & why

The release archives are currently assembled by hand in the release.yml staging steps. This adds CMake install() rules and a CPack config so the same layout is reproducible with cmake --install / cpack, and so distro packaging (DEB) has a real target.

The layout matches the existing release zip:

• engine DLL (openace64) + a drop-in ACE-named copy (ace64.dll / libace64.so / .dylib)
• openads_serverd + openads_bench
• public headers, per-compiler import libs under lib/
• LICENSE/NOTICE/README + the systemd/launchd templates under service/

Windows stays flat (drop ace64.dll next to the .exe); POSIX uses GNUInstallDirs so binaries land under bin//lib/ (right for the systemd + DEB story).

Version is automatic

CPACK_PACKAGE_VERSION and the archive name both derive from OPENADS_VERSION_STR (git describe), so tagging v1.4.1 yields openads-1.4.1-<os>-<arch> with no edits.

Clean package

The vendored, statically-linked deps were leaking their own install rules into the package. Disabled: HTTPLIB_INSTALL / JSON_Install OFF, and mbedtls ENABLE_PROGRAMS/ENABLE_TESTING/MBEDTLS_INSTALL OFF. Verified the ZIP then contains only OpenADS artifacts — no httplib.h, no *Config.cmake, no third-party share/doc.

Validation

cpack -G ZIP off main (MSVC x64) produces a clean, correctly-named archive; the normal build is unaffected and -Werror stays clean. ZIP contents:

ace64.dll  openace64.dll  openads_serverd.exe  openads_bench.exe
include/openads/*.h   lib/{msvc,mingw,borland}/*  lib/openace64.lib
LICENSE  NOTICE  README.md   service/{openads-serverd.service,com.openads.serverd.plist}

Notes

• The onboarding files (openads.ini.sample, QUICKSTART.md, openads-studio.* from feat(serverd): read settings from an openads.ini via --config #88/docs: client onboarding kit — Studio launcher, quick start, migration guide #90) install OPTIONAL-ly, so this PR is self-contained against main and they appear automatically once those land.
• CPack is not wired into release.yml here (that touches CI) — happy to add the cpack step if you'd prefer, or you can.

[gemini-code-assist]

Code Review

This pull request introduces comprehensive install rules and CPack configuration to CMakeLists.txt to enable structured, cross-platform packaging for OpenADS. Feedback focuses on improving the installation logic: removing redundant CMake variable definitions, ensuring shared libraries and shell scripts are installed with correct executable permissions on POSIX systems, and restricting OS-specific service files and scripts (such as systemd/launchd templates and .bat/.sh scripts) to their respective target platforms.

Important

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[gemini-code-assist]

The variables ENABLE_PROGRAMS and ENABLE_TESTING are already set to OFF on lines 104 and 105 within the same if(OPENADS_WITH_TLS) block. Redundantly setting them again here is unnecessary.

[gemini-code-assist]

On POSIX systems (macOS and Linux), using install(FILES) to copy the shared library target will install it with default non-executable permissions (typically 644). Shared libraries should be installed with executable permissions (typically 755) to ensure they can be loaded correctly and to satisfy package manager checks. Using install(PROGRAMS) instead of install(FILES) on non-Windows platforms automatically applies the correct executable permissions.

if(WIN32)
    install(FILES "$<TARGET_FILE:openads_ace>"
        DESTINATION "${OA_INSTALL_BIN}" RENAME "ace${OA_BITS}.dll")
elseif(APPLE)
    install(PROGRAMS "$<TARGET_FILE:openads_ace>"
        DESTINATION "${OA_INSTALL_BIN}" RENAME "libace${OA_BITS}.dylib")
else()
    install(PROGRAMS "$<TARGET_FILE:openads_ace>"
        DESTINATION "${OA_INSTALL_BIN}" RENAME "libace${OA_BITS}.so")
endif()

[gemini-code-assist]

Installing systemd and launchd service files on Windows is unnecessary and pollutes the installation directory. These should be wrapped in a if(NOT WIN32) block, and ideally, the systemd service should only be installed on Linux and the launchd plist only on macOS.

if(NOT WIN32)
    if(APPLE)
        install(FILES "${CMAKE_SOURCE_DIR}/tools/scripts/launchd/com.openads.serverd.plist"
            DESTINATION "${OA_INSTALL_DOC}/service" OPTIONAL)
    else()
        install(FILES "${CMAKE_SOURCE_DIR}/tools/scripts/systemd/openads-serverd.service"
            DESTINATION "${OA_INSTALL_DOC}/service" OPTIONAL)
    endif()
endif()

[gemini-code-assist]

Installing openads-studio.bat on POSIX systems or openads-studio.sh on Windows is unnecessary. Additionally, openads-studio.sh should be installed with executable permissions using install(PROGRAMS) so that users do not have to manually run chmod +x after installation.

install(FILES "${CMAKE_SOURCE_DIR}/openads.ini.sample"
              "${CMAKE_SOURCE_DIR}/QUICKSTART.md"
    DESTINATION "${OA_INSTALL_BIN}" OPTIONAL)

if(WIN32)
    install(FILES "${CMAKE_SOURCE_DIR}/openads-studio.bat"
        DESTINATION "${OA_INSTALL_BIN}" OPTIONAL)
else()
    install(PROGRAMS "${CMAKE_SOURCE_DIR}/openads-studio.sh"
        DESTINATION "${OA_INSTALL_BIN}" OPTIONAL)
endif()