llvm: update lldb python test

[lukeshingles]

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---

The lldb python test assumes that python3 points to the same python as lldb uses. When python3.12 gets demoted to altinstall in #182840, breaks the test.

[lukeshingles]

I can do the same for llvm@16 in either this PR, or make a separate one.

[Bo98]

python3 is calling this which should return the correct binary?

homebrew-core/Formula/l/llvm.rb

Lines 53 to 55 in db82446

	def python3
	"python3.12"
	end

[lukeshingles]

python3 is calling this which should return the correct binary?

homebrew-core/Formula/l/llvm.rb

Lines 53 to 55 in db82446

	def python3
	"python3.12"
	end

Depends on which one you consider correct. lldb will pick up python3.13 when that becomes the default (did a quick Google and couldn’t figure out how to override), which doesn’t match python3.12 required by the formula

[Bo98]

The lldb module is only built for a single Python version - it shouldn't be changing dynamically and needs to match the depends_on:

$ ls -d $(brew --prefix llvm)/libexec/python*
/opt/homebrew/opt/llvm/libexec/python3.12

It seems to work correctly on macOS at least:

$ $(brew --prefix llvm)/bin/lldb --print-script-interpreter-info
{"executable":"/opt/homebrew/opt/python@3.12/Frameworks/Python.framework/Versions/3.12/bin/python3.12","language":"python","lldb-pythonpath":"/opt/homebrew/Cellar/llvm/18.1.8/libexec/python3.12/site-packages","prefix":"/opt/homebrew/opt/python@3.12/Frameworks/Python.framework/Versions/3.12"}

[lukeshingles]

Yes, ok on macOS. Any other way to solve this on linux?

2024-10-01T12:26:39.8287536Z �[34m==>�[0m �[1mpython3.12 -c 'import pathlib, sys; print(pathlib.Path(sys.prefix).resolve())'�[0m
2024-10-01T12:26:39.8288263Z �[34m==>�[0m �[1m/home/linuxbrew/.linuxbrew/Cellar/llvm/19.1.0/bin/lldb�[0m
2024-10-01T12:26:39.8288929Z Python Interactive Interpreter. To exit, type 'quit()', 'exit()' or Ctrl-D.
2024-10-01T12:26:39.8289311Z 
2024-10-01T12:26:39.8289501Z now exiting InteractiveConsole...
2024-10-01T12:26:39.8289848Z �[31mError:�[0m llvm: failed
2024-10-01T12:26:39.8299421Z ##[error]llvm: failed
2024-10-01T12:26:39.8305796Z An exception occurred within a child process:
2024-10-01T12:26:39.8364087Z   Minitest::Assertion: Expected /\/home\/linuxbrew\/\.linuxbrew\/Cellar\/python@3\.12\/3\.12\.6_1\n/ to match "(lldb) script\n>>> /home/linuxbrew/.linuxbrew\n>>> ".
2024-10-01T12:26:39.8366380Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/minitest-5.25.1/lib/minitest/assertions.rb:176:in `assert'
2024-10-01T12:26:39.8368251Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/minitest-5.25.1/lib/minitest/assertions.rb:291:in `assert_match'
2024-10-01T12:26:39.8369934Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Taps/homebrew/homebrew-core/Formula/l/llvm.rb:715:in `block in <class:Llvm>'
2024-10-01T12:26:39.8371192Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/formula.rb:2813:in `block (3 levels) in run_test'
2024-10-01T12:26:39.8372731Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/extend/kernel.rb:536:in `with_env'
2024-10-01T12:26:39.8374012Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/formula.rb:2812:in `block (2 levels) in run_test'
2024-10-01T12:26:39.8375053Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/formula.rb:1199:in `with_logging'
2024-10-01T12:26:39.8375961Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/formula.rb:2811:in `block in run_test'
2024-10-01T12:26:39.8376803Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/mktemp.rb:75:in `block in run'
2024-10-01T12:26:39.8377563Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/mktemp.rb:75:in `chdir'
2024-10-01T12:26:39.8378254Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/mktemp.rb:75:in `run'
2024-10-01T12:26:39.8378983Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/formula.rb:3129:in `mktemp'
2024-10-01T12:26:39.8379768Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/formula.rb:2805:in `run_test'
2024-10-01T12:26:39.8380556Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/test.rb:48:in `block in <main>'
2024-10-01T12:26:39.8381738Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/portable-ruby/3.3.5/lib/ruby/3.3.0/timeout.rb:186:in `block in timeout'
2024-10-01T12:26:39.8383297Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/portable-ruby/3.3.5/lib/ruby/3.3.0/timeout.rb:41:in `handle_timeout'
2024-10-01T12:26:39.8384782Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/portable-ruby/3.3.5/lib/ruby/3.3.0/timeout.rb:195:in `timeout'
2024-10-01T12:26:39.8385730Z /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/test.rb:52:in `<main>'

[Bo98]

Seems to more be a bug in our sitecustomize (though will require rebuilding LLVM when that's fixed):

# macOS
$ python3.12 -c 'import sys; print(sys.prefix)'    
/opt/homebrew/opt/python@3.12/Frameworks/Python.framework/Versions/3.12

# Linux
$ python3.12 -c 'import sys; print(sys.prefix)'  
/home/linuxbrew/.linuxbrew/Cellar/python@3.12/3.12.6

On Linux this is causing it to use Cellar rather than opt_prefix:

$ lldb --print-script-interpreter-info
{"executable":"/home/linuxbrew/.linuxbrew/Cellar/python@3.12/3.12.6/bin/python3.12","language":"python","lldb-pythonpath":"/home/linuxbrew/.linuxbrew/Cellar/llvm/19.1.0/libexec/python3.12/site-packages","prefix":"/home/linuxbrew/.linuxbrew/Cellar/python@3.12/3.12.6"}

[lukeshingles]

Ok, close and fix in another PR? (I don't know how to fix the sitecustomize problem)