#22138 Running `__run.sh` script for mypy sandbox fails with "No such file" Issue created by huonw Describe the bug If one introspects the sandbox used for running

mypy

, the

__run.sh

script for the "Run mypy" process contains an invocation like

env -i ... __mypy_runner.sh

where the script is not a relative path. This fails with errors like

__mypy_runner.sh: No such file or directory

. It is unclear to me why it doesn't fail when Pants runs it, but clearly it does not. Reproducer: cd $(mktemp -d) cat > pants.toml <<EOF [GLOBAL] pants_version = "2.25.0" backend_packages = [ "pants.backend.python", "pants.backend.python.typecheck.mypy", ] local_cache = false [python] interpreter_constraints = ["CPython==3.12.*"] EOF echo "python_sources(name='src')" > BUILD touch foo.py pants --keep-sandboxes=always check :: 2>&1 | tee -a output.txt # Pick the path out of a line like: # 155952.14 [INFO] Preserving local process execution dir /private/var/folders/sv/vd266m4d4lvctgs2wpnhjs9w0000gn/T/pants-sandbox-3I8qPl for Run MyPy on 1 file. sandbox=$(sed -n 's/.* Preserving local process execution dir \(.*\) for Run MyPy .*/\1/p' output.txt) echo "BUG: running __run.sh in $sandbox fails with 'No such file or directory'" bash "$sandbox"/__run.sh Running that like

bash script.sh

shows:

16:03:33.07 [INFO] Initializing scheduler...
...
16:03:38.60 [INFO] Preserving local process execution dir /private/var/folders/sv/vd266m4d4lvctgs2wpnhjs9w0000gn/T/pants-sandbox-wfz4FC for Run MyPy on 1 file.
16:03:39.75 [INFO] Completed: Typecheck using MyPy - mypy - mypy succeeded.
16:02:27.71 [INFO] Completed: Typecheck using MyPy - mypy - mypy succeeded.
Success: no issues found in 1 source file


✓ mypy succeeded.

BUG: running __run.sh in /private/var/folders/sv/vd266m4d4lvctgs2wpnhjs9w0000gn/T/pants-sandbox-wfz4FC fails with 'No such file or directory'
env: __mypy_runner.sh: No such file or directory

Pants version 2.25.0 (and more, probably) OS macOS, likely others Additional info N/A pantsbuild/pants