Struggling with homebrew + meson build system finding dependencies

[ndepalma]

Output of brew config

HOMEBREW_VERSION: 4.4.14-42-gb6fafba
ORIGIN: https://github.com/Homebrew/brew
HEAD: b6fafba4864d65acabf966415e14b2dd86d81e1a
Last commit: 21 hours ago
Branch: master
Core tap HEAD: c135f377440fba9de4e3476a8637ca163ab7fa94
Core tap last commit: 27 hours ago
Core tap JSON: 05 Jan 22:55 UTC
Core cask tap HEAD: 07ccefe9760bf82707df576c60a541e2a11e3415
Core cask tap last commit: 28 hours ago
Core cask tap JSON: 05 Jan 22:55 UTC
HOMEBREW_PREFIX: /opt/homebrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_MAKE_JOBS: 8
HOMEBREW_SORBET_RUNTIME: set
Homebrew Ruby: 3.3.6 => /opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.3.6/bin/ruby
CPU: octa-core 64-bit arm_firestorm_icestorm
Clang: 16.0.0 build 1600
Git: 2.39.5 => /Library/Developer/CommandLineTools/usr/bin/git
Curl: 8.7.1 => /usr/bin/curl
macOS: 15.2-arm64
CLT: 16.2.0.0.1.1733547573
Xcode: N/A
Rosetta 2: false

Output of brew doctor

Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry or file an issue; just ignore this. Thanks!

Warning: Some installed kegs have no formulae!
This means they were either deleted or installed manually.
You should find replacements for the following formulae:
  clang-tidy

Description of issue

I'm struggling a bit to get the depends_on() primitive in homebrew and the meson dependencies() primitive to work well together. I suspect it's a path issue but I don't know enough about the homebrew system to solve this on my own.

The repository that I'm working with is public: here.

When I run the meson build using meson setup build;cd build;meson compile then I get the following:

 ᨂ meson setup build;cd build;meson compile
The Meson build system
Version: 1.6.1
Source dir: /Users/drobotnik/projects/functional-dag
Build dir: /Users/drobotnik/projects/functional-dag/build
Build type: native build
Project name: functional-dag
Project version: 1.0rc1
C++ compiler for the host machine: c++ (clang 16.0.0 "Apple clang version 16.0.0 (clang-1600.0.26.6)")
C++ linker for the host machine: c++ ld64 1115.7.3
Host machine cpu family: aarch64
Host machine cpu: aarch64
Program echo found: YES (/bin/echo)
Found pkg-config: YES (/opt/homebrew/bin/pkg-config) 2.3.0
Run-time dependency catch2-with-main found: YES 3.7.1
Run-time dependency flatbuffers found: YES 24.12.23
Program mkdir found: YES (/bin/mkdir)
Program clang-tidy found: YES (/opt/homebrew/bin/clang-tidy)
Build targets in project: 9

Found ninja-1.12.1 at /opt/homebrew/bin/ninja
INFO: autodetecting backend as ninja
INFO: calculating backend command to run: /opt/homebrew/bin/ninja
[13/13] Linking target lib_tests

But when I run the build from homebrew for testing (note, you may need to comment out the bottle do clause in the formula [still working on that]) then I get the following:

 ᨂ brew install --build-from-source --verbose Formula/functional-dag.rb
Error: Failed to load cask: Formula/functional-dag.rb
Cask 'functional-dag' is unreadable: wrong constant name #<Class:0x000000013a89a338>
Warning: Treating Formula/functional-dag.rb as a formula.
==> Fetching functional-dag
==> Downloading https://github.com/petroglyf/functional-dag/archive/refs/tags/brew-v1.0.tar.gz
==> Downloading from https://codeload.github.com/petroglyf/functional-dag/tar.gz/refs/tags/brew-v1.0
/usr/bin/env /opt/homebrew/Library/Homebrew/shims/shared/curl --disable --cookie /dev/null --globoff --show-error --user-agent Homebrew/4.4.14-42-gb6fafba\ \(Macintosh\;\ arm64\ Mac\ OS\ X\ 15.2\)\ curl/8.7.1 --header Accept-Language:\ en --fail --retry 3 --remote-time --output /Users/drobotnik/Library/Caches/Homebrew/downloads/42de000d5cdd638f9d3599cd92823e4627e9553542a99dfcf9f317d565e755b2--functional-dag-brew-v1.0.tar.gz.incomplete --location https://codeload.github.com/petroglyf/functional-dag/tar.gz/refs/tags/brew-v1.0
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 61793    0 61793    0     0   502k      0 --:--:-- --:--:-- --:--:--  507k
==> Verifying checksum for '42de000d5cdd638f9d3599cd92823e4627e9553542a99dfcf9f317d565e755b2--functional-dag-brew-v1.0.tar.gz'
/usr/bin/env tar --extract --no-same-owner --file /Users/drobotnik/Library/Caches/Homebrew/downloads/42de000d5cdd638f9d3599cd92823e4627e9553542a99dfcf9f317d565e755b2--functional-dag-brew-v1.0.tar.gz --directory /private/tmp/homebrew-unpack-20250105-71656-gvhnja
mv /private/tmp/homebrew-unpack-20250105-71656-gvhnja/functional-dag-brew-v1.0 /private/tmp/functional-dag-20250105-71656-6uv8ty/functional-dag-brew-v1.0
==> meson setup build --prefix=/opt/homebrew/Cellar/functional-dag/1.0rc1 --libdir=/opt/homebrew/Cellar/functional-dag/1.0rc1/lib --buildtype=release --wrap-mode=nofallback
The Meson build system
Version: 1.6.1
Source dir: /private/tmp/functional-dag-20250105-71656-6uv8ty/functional-dag-brew-v1.0
Build dir: /private/tmp/functional-dag-20250105-71656-6uv8ty/functional-dag-brew-v1.0/build
Build type: native build
Project name: functional-dag
Project version: 1.0rc1
C++ compiler for the host machine: clang++ (clang 16.0.0 "Apple clang version 16.0.0 (clang-1600.0.26.6)")
C++ linker for the host machine: clang++ ld64 1115.7.3
Host machine cpu family: aarch64
Host machine cpu: aarch64
Program echo found: YES (/bin/echo)
Found pkg-config: YES (/opt/homebrew/Library/Homebrew/shims/mac/super/pkg-config) 2.3.0
Did not find CMake 'cmake'
Found CMake: NO
Run-time dependency catch2-with-main found: NO (tried pkgconfig and framework)

meson.build:32:12: ERROR: Dependency "catch2-with-main" not found, tried pkgconfig and framework

A full log can be found at /private/tmp/functional-dag-20250105-71656-6uv8ty/functional-dag-brew-v1.0/build/meson-logs/meson-log.txt

==> Formula
Path: /Users/drobotnik/projects/functional-dag/Formula/functional-dag.rb
==> Configuration
HOMEBREW_VERSION: 4.4.14-42-gb6fafba
ORIGIN: https://github.com/Homebrew/brew
HEAD: b6fafba4864d65acabf966415e14b2dd86d81e1a
Last commit: 22 hours ago
Branch: master
Core tap HEAD: c135f377440fba9de4e3476a8637ca163ab7fa94
Core tap last commit: 28 hours ago
Core tap JSON: 06 Jan 00:07 UTC
Core cask tap HEAD: 07ccefe9760bf82707df576c60a541e2a11e3415
Core cask tap last commit: 29 hours ago
Core cask tap JSON: 06 Jan 00:07 UTC
HOMEBREW_PREFIX: /opt/homebrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_MAKE_JOBS: 8
HOMEBREW_SORBET_RUNTIME: set
Homebrew Ruby: 3.3.6 => /opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.3.6/bin/ruby
CPU: octa-core 64-bit arm_firestorm_icestorm
Clang: 16.0.0 build 1600
Git: 2.39.5 => /Library/Developer/CommandLineTools/usr/bin/git
Curl: 8.7.1 => /usr/bin/curl
macOS: 15.2-arm64
CLT: 16.2.0.0.1.1733547573
Xcode: N/A
Rosetta 2: false
==> ENV
HOMEBREW_CC: clang
HOMEBREW_CXX: clang++
MAKEFLAGS: -j8
CMAKE_PREFIX_PATH: /opt/homebrew
CMAKE_INCLUDE_PATH: /Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk/System/Library/Frameworks/OpenGL.framework/Versions/Current/Headers
CMAKE_LIBRARY_PATH: /Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk/System/Library/Frameworks/OpenGL.framework/Versions/Current/Libraries
PKG_CONFIG_LIBDIR: /usr/lib/pkgconfig:/opt/homebrew/Library/Homebrew/os/mac/pkgconfig/15
HOMEBREW_MAKE_JOBS: 8
HOMEBREW_GIT: git
HOMEBREW_SDKROOT: /Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk
ACLOCAL_PATH: /opt/homebrew/share/aclocal
PATH: /opt/homebrew/Library/Homebrew/shims/mac/super:/opt/homebrew/opt/meson/bin:/opt/homebrew/opt/ninja/bin:/usr/bin:/bin:/usr/sbin:/sbin

Error: functional-dag 1.0rc1 did not build
Logs:
     /Users/drobotnik/Library/Logs/Homebrew/functional-dag/00.options.out
     /Users/drobotnik/Library/Logs/Homebrew/functional-dag/01.meson
     /Users/drobotnik/Library/Logs/Homebrew/functional-dag/01.meson.cc
     /Users/drobotnik/Library/Logs/Homebrew/functional-dag/build
Do not report this issue to Homebrew/brew or Homebrew/homebrew-core!

Any thoughts?

[alebcay]

One thing to note about dependencies in Homebrew is that dependencies marked as :test are only available in the test do block. If you are trying to build tests in the def install block, then catch2 will not be visible to meson. You would need to make catch2 as :build if it's only needed to build the tests, or as [:build, :test] if it's needed both to build the tests and to run them later.

Another thing to note is that the build process (everything in def install block) happens in a temporary folder which is thrown away at the end of the build. Intermediate outputs and build artifacts, etc., are not accessible from the test do block. If there's anything you want to keep - including tests that you may want to run during your test do block - you must install it into the prefix (i.e. your meson install step should install everything you want to keep, or add an additional manual step to copy/move files).

[ndepalma]

Ah! Okay let me try a few things.