[lldb] Add Python requirements.txt for test suite

[DavidSpickett]

This means that CI won't have to hardcode these.

[llvmbot]

@llvm/pr-subscribers-lldb

Author: David Spickett (DavidSpickett)

Changes

This means that CI won't have to hardcode these.

We can't do conditional installs here by platform so pexpect is listed normally. If it's installed on Windows that's fine, we just won't use it.

---

Full diff: https://github.com/llvm/llvm-project/pull/94220.diff

1 Files Affected:

• (added) lldb/requirements.txt (+7)

diff --git a/lldb/requirements.txt b/lldb/requirements.txt
new file mode 100644
index 0000000000000..645004bd3f57c
--- /dev/null
+++ b/lldb/requirements.txt
@@ -0,0 +1,7 @@
+# These Python packages are required to be able to run the LLDB test suite.
+
+psutil
+# pexpect is only required on Linux, can be installed on Windows but pexpect
+# tests are automatically skipped there because they are known not to work
+# (llvm.org/pr22274).
+pexpect

[DavidSpickett]

I've not been able to find what versioning scheme these 2 packages use, so I'm not sure what versions to put here if any.

Currently Linaro has:
psutil==5.9.4 on Windows
psutil == 5.9.8 on Linux
pexpect==4.9.0 on Linux

I don't think it needs to be ==, but maybe pinning to a version that won't break API? If the projects have such a thing of course.

This is initially for Github CI, so we could just use the Linux versions.

[DavidSpickett]

Example from MLIR:

llvm-project/mlir/python/requirements.txt

Lines 1 to 3 in a58dd0e

	numpy>=1.19.5, <=1.26
	pybind11>=2.9.0, <=2.10.3
	PyYAML>=5.3.1, <=6.0.1

[Endilll]

I've not been able to find what versioning scheme these 2 packages use, so I'm not sure what versions to put here if any.

Currently Linaro has: psutil==5.9.4 on Windows psutil == 5.9.8 on Linux pexpect==4.9.0 on Linux

I don't think it needs to be ==, but maybe pinning to a version that won't break API? If the projects have such a thing of course.

This is initially for Github CI, so we could just use the Linux versions.

I think you can list them as minimal required versions for now.

[DavidSpickett]

Added minimum versions.

[DavidSpickett]

Anecdotal evidence - last time I updated these I just installed the most recent and nothing broke. So we're probably fine with minimums, especially as this will be checked regularly by the CI job.

[DavidSpickett]

I was wrong, you can do conditionals - https://peps.python.org/pep-0508/. pexpect now not installed on Windows.