1772453 - python setup (pip, etc.) output should be sent to stderr rather than stdout

Status: NEW

(Firefox Build System :: Mach Core, defect, P3)

Description

[Mike Hommey [:glandium]]

Regularly, mach reinitializes virtualenvs and outputs things like:

created virtual environment CPython3.9.2.final.0-64 in 12ms
  creator CPython3Posix(dest=/home/glandium/.mozbuild/srcdirs/gecko-0cba0f2a7949/_virtualenvs/mach, clear=False, no_vcs_ignore=False, global=False)
  activators BashActivator,CShellActivator,FishActivator,PowerShellActivator,PythonActivator
Collecting glean-sdk==44.1.1
  Using cached glean_sdk-44.1.1-cp36-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (1.2 MB)
Collecting cffi>=1.13.0
  Using cached cffi-1.15.0-cp39-cp39-manylinux_2_12_x86_64.manylinux2010_x86_64.whl (444 kB)
Collecting glean-parser==5.0.1
  Using cached glean_parser-5.0.1-py3-none-any.whl (88 kB)
Requirement already satisfied: diskcache>=4 in ./third_party/python/diskcache (from glean-parser==5.0.1->glean-sdk==44.1.1) (4.1.0)
Requirement already satisfied: PyYAML>=5.3.1 in ./third_party/python/PyYAML/lib3 (from glean-parser==5.0.1->glean-sdk==44.1.1) (5.4.1)
Requirement already satisfied: yamllint>=1.18.0 in ./third_party/python/yamllint (from glean-parser==5.0.1->glean-sdk==44.1.1) (1.23.0)
Requirement already satisfied: Click>=7 in ./third_party/python/click (from glean-parser==5.0.1->glean-sdk==44.1.1) (7.1.2)
Requirement already satisfied: Jinja2>=2.10.1 in ./third_party/python/Jinja2 (from glean-parser==5.0.1->glean-sdk==44.1.1) (2.11.3)
Requirement already satisfied: jsonschema>=3.0.2 in ./third_party/python/jsonschema (from glean-parser==5.0.1->glean-sdk==44.1.1) (3.2.0)
Requirement already satisfied: appdirs>=1.4 in ./third_party/python/appdirs (from glean-parser==5.0.1->glean-sdk==44.1.1) (1.4.4)
Collecting pycparser
  Using cached pycparser-2.21-py2.py3-none-any.whl (118 kB)
Requirement already satisfied: MarkupSafe>=0.23 in ./third_party/python/MarkupSafe/src (from Jinja2>=2.10.1->glean-parser==5.0.1->glean-sdk==44.1.1) (1.1.1)
Requirement already satisfied: setuptools in ./third_party/python/setuptools (from jsonschema>=3.0.2->glean-parser==5.0.1->glean-sdk==44.1.1) (51.2.0)
Requirement already satisfied: six>=1.11.0 in ./third_party/python/six (from jsonschema>=3.0.2->glean-parser==5.0.1->glean-sdk==44.1.1) (1.13.0)
Requirement already satisfied: attrs>=17.4.0 in ./third_party/python/attrs (from jsonschema>=3.0.2->glean-parser==5.0.1->glean-sdk==44.1.1) (19.2.0)
Requirement already satisfied: pyrsistent>=0.14.0 in ./third_party/python/pyrsistent (from jsonschema>=3.0.2->glean-parser==5.0.1->glean-sdk==44.1.1) (0.16.0)
Requirement already satisfied: pathspec>=0.5.3 in ./third_party/python/pathspec (from yamllint>=1.18.0->glean-parser==5.0.1->glean-sdk==44.1.1) (0.9.0)
Installing collected packages: pycparser, glean-parser, cffi, glean-sdk
Successfully installed cffi-1.15.0 glean-parser-5.0.1 glean-sdk-44.1.1 pycparser-2.21
Collecting psutil<=5.8.0,>=5.4.2
  Using cached psutil-5.8.0-cp39-cp39-manylinux2010_x86_64.whl (293 kB)
Installing collected packages: psutil
Successfully installed psutil-5.8.0
Collecting zstandard<=0.17.0,>=0.11.1
  Using cached zstandard-0.17.0-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (2.5 MB)
Installing collected packages: zstandard
Successfully installed zstandard-0.17.0

This is all sent to stdout. Unfortunately, for commands that also have their own output, that means that a redirection of the output will also redirect that output.

Comment 1

[Mike Hommey [:glandium]]

It seems to be true of all kind of logging from mach, actually.