[Bug]: ./scripts/build_als.sh fails on Mac Sequoia

[rogermc2]

Environment

• OS and Version: Mac OSX 15.3
• IDE Version: None. Running from Terminal
• Ada & SPARK Extension Version: gcc-14.2.0-3-aarch64

Bug Summary and Reproducer

Bug Summary: ./scripts/build_als.sh failed after Successfully installed Langkit-0.1.0:

• python manage.py make --no-mypy --generate-auto-dll-dirs --library-types=relocatable --gargs '-m -v -cargs:ada -gnateb'
  Traceback (most recent call last):
  File "/System/Volumes/Data/Ada_Source/ada_language_server/subprojects/langkit_support/manage.py", line 14, in
  from langkit.packaging import NativeLibPackager
  File "/System/Volumes/Data/Ada_Source/ada_language_server/subprojects/langkit_support/langkit/packaging.py", line 12, in
  from langkit.utils import LibraryType
  File "/System/Volumes/Data/Ada_Source/ada_language_server/subprojects/langkit_support/langkit/utils/init.py", line 341, in
  from langkit.utils.text import *
  File "/System/Volumes/Data/Ada_Source/ada_language_server/subprojects/langkit_support/langkit/utils/text.py", line 50, in
  class Language(enum.StrEnum):
  AttributeError: module 'enum' has no attribute 'StrEnum'
  error: Command ["bash", "-x", "./scripts/build_als.sh", "build_langkit_raw"] exited with code 1

Steps to reproduce:In ada_language_server run ./scripts/build_als.s

Expected behavior:./scripts/build_als.sh runs to completion without errors

Configuration and Logs

cat $HOME/.als/gpr_ls_traces.cfg
>gpr_ls_log.$T.log:buffer_size=0:buffer_size=0
ALS.MAIN=yes
ALS.IN=no
ALS.OUT=no

Other VS Code Extensions

No response

Additional context

No response

[eliericha]

Hello there,

This looks like a mismatch in the version of Python. Which Python version does your system have? You need Python 3.11 or newer to build langkit which is a dependency of ALS.

[rogermc2]

This computer did have some old versions of Python which I have now deleted. However I still get:
`PS1='(.venv) '
++ export PS1
++ VIRTUAL_ENV_PROMPT='(.venv) '
++ export VIRTUAL_ENV_PROMPT
++ '[' -n /opt/homebrew/bin/bash -o -n '' ']'
++ hash -r

• case $STEP in
• build_langkit_raw
• cd subprojects/langkit_support
• echo GPR_PROJECT_PATH=`

................   Long printout of GPR_PROJECT_PATH  .............
sed -i.bak -e s/GPR_BUILD/GPR_LIBRARY_TYPE/ ./langkit/libmanage.py
+ pip install .
./scripts/build_als.sh: line 162: /System/Volumes/Data/Ada_Source/ada_language_server/.venv/bin/pip: cannot execute: required file not found
error: Command ["bash", "-x", "./scripts/build_als.sh", "build_langkit_raw"] exited with code 127`
```
Python now seems OK:
```
 python
Python 3.13.1 (main, Dec  3 2024, 17:59:52) [Clang 16.0.0 (clang-1600.0.26.4)] on darwin
```
`pip --version
pip 24.3.1 from /opt/homebrew/lib/python3.13/site-packages/pip (python 3.13)`

[eliericha]

It's likely that the lingering virtual env ada_language_server/.venv is still referencing the now deleted old Python version.

So it must be deleted, and then build_als.sh will recreate it.

[rogermc2]

./scripts/build_als.sh doesn't seem to recreate ada_language_server/.venv:
` OS_LIB_EXT=.dylib

• activate_venv
• '[' -d /System/Volumes/Data/Ada_Source/ada_language_server/.venv ']'
• python -m venv /System/Volumes/Data/Ada_Source/ada_language_server/.venv
  ./scripts/build_als.sh: line 79: python: command not found`

[eliericha]

Do you have a python executable on the PATH? What is the output of which python and which python3 ?

[rogermc2]

In PATH:
/opt/homebrewl/Cellar/python@3.13/3.13.0_1

which python python: aliased to python3
which python3 /opt/homebrew/bin/python3
python3 --version Python 3.13.1

[github-openvsx-adacore]

python is defined as an alias. I suspect this is not enough to make the build script find it. I suggest creating a symbolic link to python3 in a location on PATH instead of the alias to see if that helps.

[rogermc2]

I cleaned up python aliases quite a lot and created symbolic links python an python3 to python3.13 in /usr/local/bin
`Roger@Rogers-MacBook-Air-2 ada_language_server % which python
python: aliased to python3

Roger@Rogers-MacBook-Air-2 ada_language_server % which python3
/opt/homebrew/bin/python3
`
These show as aliases but they were created using ln -s.

./scripts/build_als.sh now fails with:
`activate_venv

• '[' -d /System/Volumes/Data/Ada_Source/ada_language_server/.venv ']'
• python -m venv /System/Volumes/Data/Ada_Source/ada_language_server/.venv
  ./scripts/build_als.sh: line 79: python: command not found`

[simonjwright]

I don't understand some of the comments above.

Perhaps it would help if @rogermc2 could say what ada_language_server source version he's using?

I'm using the source archive from the 26.0.202412191 release, and in that archive scripts/build_als.sh doesn't setup or activate a virtual environment, nor is there any reference to OS_LIB_EXT.

[rogermc2]

I don't know which version of ada_language_server. I cloned it on 31 January 2025. Maybe 26.0.202412190 which is stated i the Changelog. I'll try 26.0.202412191

[rogermc2]

I tried source archive from the 26.0.202412191 release, but ./scripts/build_als.sh failed.
sudo ./scripts/build_als.sh
vss_gnat.gpr:11:17: no compiler for language "Ada", cannot compile "a-suvsau.adb" gprbuild: *** compilation phase failed Traceback (most recent call last): File "/System/Volumes/Data/Ada_Source/ada_language_server-26.0.202412191/subprojects/langkit_support/manage.py", line 443, in <module> args.func(args, unknown_args) ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^ File "/System/Volumes/Data/Ada_Source/ada_language_server-26.0.202412191/subprojects/langkit_support/manage.py", line 135, in wrapper fn(args) ~~^^^^^^ File "/System/Volumes/Data/Ada_Source/ada_language_server-26.0.202412191/subprojects/langkit_support/manage.py", line 298, in make build_langkit_support(args) ~~~~~~~~~~~~~~~~~~~~~^^^^^^ File "/System/Volumes/Data/Ada_Source/ada_language_server-26.0.202412191/subprojects/langkit_support/manage.py", line 166, in build_langkit_support subprocess.check_call( ~~~~~~~~~~~~~~~~~~~~~^ base_argv ^^^^^^^^^ + ["-P", SUPPORT_GPR, f"-XLIBRARY_TYPE={library_type.value}"] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + gargs ^^^^^^^ ) ^ File "/opt/homebrew/Cellar/python@3.13/3.13.1/Frameworks/Python.framework/Versions/3.13/lib/python3.13/subprocess.py", line 419, in check_call raise CalledProcessError(retcode, cmd) subprocess.CalledProcessError: Command '['gprbuild', '-p', '-j8', '-XBUILD_MODE=dev', '-P', '/System/Volumes/Data/Ada_Source/ada_language_server-26.0.202412191/subprojects/langkit_support/langkit/support/langkit_support.gpr', '-XLIBRARY_TYPE=relocatable', '-cargs', '-fPIC']' returned non-zero exit status 4. error: Command ["bash", "./scripts/build_als.sh", "build_so_raw"] exited with code 1

Can't find Ada compiler?
`which gnat

/opt/gcc-14.2.0-3-aarch64/bin/gnat
`

[simonjwright]

Perhaps it’s because of using sudo? - you shouldn’t need to.

26.0.202412190 is the pre-release, 26.0.202412191 is the release.

The build script runs alr internally (I think it creates alire.toml on the fly). I used alr toolchain --select to choose the None option (use the compiler, gprbuild on the PATH) before invoking the script.

I’m using Homebrew’s python 3.11.

I’ve been scratching around trying to get a build with a private build of GCC 15.0.1 (for reasons) and I don’t remember why I stopped using the source release and built from the repo (as documented). There was (at least!) one problem that’d need to be fixed (I privately reverted that commit, it took some doing to find the actual parent!)

[rogermc2]

I probably used sudo out of desperation! I decided to try on another computer but didn't get very far:
`bprojects/adasat.toml -> subprojects/adasat/alire.toml

• alr --force --non-interactive pin adasat --use=/System/Volumes/Data/Ada_Source/ada_language_server-26.0.202412191/subprojects/adasat
  ⓘ Synchronizing workspace...
  error: Unexpected file in index: /System/Volumes/Data/Ada_Source/ada_language_server-26.0.202412191/index/.DS_Store`
  which seems ridiculous as when I look there is no .DS_Store there. Even if I rm it, I still get the error. This kept happening for a number of ada_language_server replacements including cloning!

[simonjwright]

I hope this won’t be annoying, but ...

/System/Volumes/Data/ is part of Apple’s APFS filing system, normally you don’t see it, and it appears as /. So your /System/Volumes/Data/Ada_Source appears as /Ada_Source. This probably isn’t the problem, but you never know.

.DS_Store is a file that Finder puts into any directory it visits to store details of how the contents are presented. Finder doesn’t normally show dot-files (files whose name begins with a .). You can make it show them, and other hidden files, by shift-command-. (but even then it doesn’t show .DS_Store).

You could look for an alternative to Finder, but the simplest way is to only use Terminal (or Emacs :-) to examine source code.

You could get rid of all the .DS_Store files under a directory by e.g.

check that you’re looking at the right files

simon@ramoth Developer$ find alire -name .DS_Store
alire/.DS_Store
alire/testsuite/.DS_Store
alire/src/.DS_Store
alire/src/alr/.DS_Store

remove them

simon@ramoth Developer$ find alire -name .DS_Store | xargs rm

check they’re gone

simon@ramoth Developer$ find alire -name .DS_Store

Or we could write a tool (in Ada) to do just this job.