[PATCH v3 00/13] meson: cleanups, improvements, smallish fixes

Hi,

this patch series contains a mostly-random set of smallish improvements, simplifications and fixes to the Meson build instructions.

Changes in v2:
  - Redo the two commits regarding PATH handling. We now only prepend
    system-specific paths to PATH and handle the `-Dsane_tool_path`
    option the same.
  - Continue to propagate libcurl include directories into libgit, as we
    need it for "help.c" to resolve LIBCURL_VERSION. Reorder the patch
    to minimize the required changes.
  - Fix a commit message typo.
  - Include another commit that fixes the OpenSSL fallback on Windows.
  - Include another commit to fix linker errors due to out-of-memory
    situations on Windows with GitLab CI.
  - Link to v1: https://lore.kernel.org/r/20250129-b4-pks-meson-improvements-v1-0-ab709f0be12c@pks.im

Changes in v3:
  - Fix missing linker arguments for a couple of aliased executables on
    Windows with MSVC.
  - Link to v2: https://lore.kernel.org/r/20250130-b4-pks-meson-improvements-v2-0-2f05581ffb44@pks.im

I've kicked off an extra pipeline at [1] to verify that this version works on next and doesn't break anything.

Thanks!

Patrick

[1]: https://github.com/git/git/pull/1898

---
Patrick Steinhardt (13):
      meson: fix exec path with enabled runtime prefix
      meson: fix OpenSSL fallback when not explicitly required
      meson: inline the static 'git' library
      meson: simplify use of the common-main library
      meson: introduce `libgit_curl` dependency
      meson: stop linking libcurl into all executables
      meson: drop separate version library
      meson: improve PATH handling
      meson: improve handling of `sane_tool_path` option
      meson: prevent finding sed(1) in a loop
      meson: fix overwritten `git` variable
      meson: consistently use custom program paths to resolve programs
      gitlab-ci: restrict maximum number of link jobs on Windows

 .gitlab-ci.yml                  |   2 +-
 Documentation/howto/meson.build |   2 +-
 Documentation/meson.build       |  13 ++--
 meson.build                     | 156 +++++++++++++++++++---------------------
 meson_options.txt               |   4 +-
 oss-fuzz/meson.build            |   2 +-
 t/helper/meson.build            |   4 +-
 t/meson.build                   |   4 +-
 8 files changed, 89 insertions(+), 98 deletions(-)

Range-diff versus v2:

 1:  94730a8bdb4 =  1:  fd7097ab8bd meson: fix exec path with enabled runtime prefix
 2:  97710a79d0f =  2:  ff8d4cd70c6 meson: fix OpenSSL fallback when not explicitly required
 3:  66a8c6f24d0 =  3:  238a45c8bb0 meson: inline the static 'git' library
 4:  f717119b1a0 !  4:  1bd9f892310 meson: simplify use of the common-main library
    @@ Commit message
         instead of creating a static library, we now instead compile the common
         set of files into each executable separately.
     
    -    This change surfaces an issue when linking aliases for git-remote-http:
    -    we extract all objects from `git-remote-http` et al and then link them
    -    into the new executable. As such, these objects would already contain
    -    a `main()` function. But now that we also compile "common-main.c" into
    -    these aliased executables we see a linker error due to `main()` being
    -    defined twice. We fix this by only linking against `libgit.a`.
    -
         Signed-off-by: Patrick Steinhardt <ps@pks.im>
     
      ## meson.build ##
    @@ meson.build: if host_machine.system() == 'windows'
        endif
      endif
     -common_main_library = static_library('common-main',
    -+
    -+libgit_commonmain = declare_dependency(
    -   sources: common_main_sources,
    +-  sources: common_main_sources,
     -  c_args: libgit_c_args,
     -  dependencies: libgit_dependencies,
     -  include_directories: libgit_include_directories,
     -)
     -common_main = declare_dependency(
     -  link_with: common_main_library,
    ++
    ++libgit_commonmain = declare_dependency(
    ++  link_with: static_library('common-main',
    ++    sources: common_main_sources,
    ++    dependencies: [ libgit ],
    ++  ),
        link_args: common_main_link_args,
     +  dependencies: [ libgit ],
      )
    @@ meson.build: if get_option('curl').enabled()
          test_dependencies += executable(alias,
            objects: git_remote_http.extract_all_objects(recursive: false),
     -      dependencies: [libgit, common_main],
    -+      dependencies: [libgit],
    ++      dependencies: [libgit_commonmain],
          )
      
          install_symlink(alias + executable_suffix,
    @@ meson.build: test_dependencies += executable('git-imap-send',
        bin_wrappers += executable(alias,
          objects: git.extract_all_objects(recursive: false),
     -    dependencies: [libgit, common_main],
    -+    dependencies: [libgit],
    ++    dependencies: [libgit_commonmain],
        )
      
        install_symlink(alias + executable_suffix,
 5:  1b61303b130 !  5:  024f4297f5e meson: introduce `libgit_curl` dependency
    @@ meson.build: if get_option('curl').enabled()
        foreach alias : [ 'git-remote-https', 'git-remote-ftp', 'git-remote-ftps' ]
          test_dependencies += executable(alias,
     -      objects: git_remote_http.extract_all_objects(recursive: false),
    --      dependencies: [libgit],
    +-      dependencies: [libgit_commonmain],
     +      sources: 'remote-curl.c',
     +      dependencies: [libgit_curl],
          )
 6:  70dc5edc05c =  6:  7fa4957e256 meson: stop linking libcurl into all executables
 7:  7fe6d1d4e74 =  7:  b24c4e06deb meson: drop separate version library
 8:  1d0597eb7cf =  8:  8ca171f9694 meson: improve PATH handling
 9:  9219ab697a7 =  9:  beedc776a7b meson: improve handling of `sane_tool_path` option
10:  7e3e0bb409f = 10:  018f549375f meson: prevent finding sed(1) in a loop
11:  c1243c17dbe ! 11:  3da8f4f105d meson: fix overwritten `git` variable
    @@ meson.build: test_dependencies += executable('git-imap-send',
        bin_wrappers += executable(alias,
     -    objects: git.extract_all_objects(recursive: false),
     +    objects: git_builtin.extract_all_objects(recursive: false),
    -     dependencies: [libgit],
    +     dependencies: [libgit_commonmain],
        )
      
12:  f06585cd99e = 12:  b2febf1acac meson: consistently use custom program paths to resolve programs
13:  02f0ffdd362 = 13:  f5bb92726dc gitlab-ci: restrict maximum number of link jobs on Windows

--- base-commit: 6dd4e543f2219290db9faa61b30f7f30a34e4b50 change-id: 20250121-b4-pks-meson-improvements-3e575363e91c