Adjust LANG note, drop LANG for 3.13+ #895
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tianon
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Dec 21, 2023
tianon
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docker-library-bot
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Mar 22, 2024
Changes: - docker-library/python@1b7a110: Merge pull request docker-library/python#895 from infosiftr/utf-note - docker-library/python@656d5af: Merge pull request docker-library/python#914 from infosiftr/3.10-key - docker-library/python@44def75: Swap 3.10 release key back to Pablo
edmorley
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Previously the buildpack would set the `LANG` env var at build and run time to the value `C.UTF-8`, to match the official Docker Python images. However, the env var should not be needed for modern Python, and so the official Docker Python images no longer set it: docker-library/python#887 docker-library/python#895 In addition, the older issues typically only affected other distros such as alpine, or environments where someone had overridden the system locale, which doesn't apply to the Heroku base images.
edmorley
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Previously the buildpack would set the `LANG` env var at build and run time to the value `C.UTF-8`, to match the official Docker Python images. However, the env var should not be needed for modern Python, and so the official Docker Python images no longer set it: docker-library/python#887 docker-library/python#895 In addition, the older issues typically only affected other distros such as alpine, or environments where someone had overridden the system locale, which doesn't apply to the Heroku base images. GUS-W-17443565.
Eijebong
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Jun 23, 2025
Python 3.13 dropped that in docker-library/python#895 Without this, running balrog locally results in ``` balrogadmin-1 | File "/app/uwsgi/admin.wsgi", line 74, in <module> balrogadmin-1 | from auslib.web.admin.base import app as application # noqa balrogadmin-1 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ balrogadmin-1 | File "/app/src/auslib/web/admin/base.py", line 29, in <module> balrogadmin-1 | .add_spec(path.join(current_dir, "swagger/api.yml")) balrogadmin-1 | ~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/specsynthase/specbuilder.py", line 44, in add_spec balrogadmin-1 | spec = self._load_spec(file_name) balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/specsynthase/specbuilder.py", line 13, in _load_spec balrogadmin-1 | return yaml.load(spec_file, Loader=yaml.FullLoader) balrogadmin-1 | ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/yaml/__init__.py", line 79, in load balrogadmin-1 | loader = Loader(stream) balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/yaml/loader.py", line 24, in __init__ balrogadmin-1 | Reader.__init__(self, stream) balrogadmin-1 | ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^ balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/yaml/reader.py", line 85, in __init__ balrogadmin-1 | self.determine_encoding() balrogadmin-1 | ~~~~~~~~~~~~~~~~~~~~~~~^^ balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/yaml/reader.py", line 124, in determine_encoding balrogadmin-1 | self.update_raw() balrogadmin-1 | ~~~~~~~~~~~~~~~^^ balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/yaml/reader.py", line 178, in update_raw balrogadmin-1 | data = self.stream.read(size) balrogadmin-1 | File "/usr/local/lib/python3.13/encodings/ascii.py", line 26, in decode balrogadmin-1 | return codecs.ascii_decode(input, self.errors)[0] balrogadmin-1 | ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^ balrogadmin-1 | UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 773: ordinal not in range(128) balrogadmin-1 exited with code 22 ``` Because our swagger config contains some non ASCII characters so it cannot be read to a string if `LANG` is unset which defaults to `POSIX` (at least on my system). I probably went overboard by setting it into every python container as some might not actually require it, but I feel like everyone would expect a UTF-8 locale to be set.
Eijebong
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Jun 24, 2025
Python 3.13 dropped that in docker-library/python#895 Without this, running balrog locally results in ``` balrogadmin-1 | File "/app/uwsgi/admin.wsgi", line 74, in <module> balrogadmin-1 | from auslib.web.admin.base import app as application # noqa balrogadmin-1 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ balrogadmin-1 | File "/app/src/auslib/web/admin/base.py", line 29, in <module> balrogadmin-1 | .add_spec(path.join(current_dir, "swagger/api.yml")) balrogadmin-1 | ~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/specsynthase/specbuilder.py", line 44, in add_spec balrogadmin-1 | spec = self._load_spec(file_name) balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/specsynthase/specbuilder.py", line 13, in _load_spec balrogadmin-1 | return yaml.load(spec_file, Loader=yaml.FullLoader) balrogadmin-1 | ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/yaml/__init__.py", line 79, in load balrogadmin-1 | loader = Loader(stream) balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/yaml/loader.py", line 24, in __init__ balrogadmin-1 | Reader.__init__(self, stream) balrogadmin-1 | ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^ balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/yaml/reader.py", line 85, in __init__ balrogadmin-1 | self.determine_encoding() balrogadmin-1 | ~~~~~~~~~~~~~~~~~~~~~~~^^ balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/yaml/reader.py", line 124, in determine_encoding balrogadmin-1 | self.update_raw() balrogadmin-1 | ~~~~~~~~~~~~~~~^^ balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/yaml/reader.py", line 178, in update_raw balrogadmin-1 | data = self.stream.read(size) balrogadmin-1 | File "/usr/local/lib/python3.13/encodings/ascii.py", line 26, in decode balrogadmin-1 | return codecs.ascii_decode(input, self.errors)[0] balrogadmin-1 | ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^ balrogadmin-1 | UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 773: ordinal not in range(128) balrogadmin-1 exited with code 22 ``` Because our swagger config contains some non ASCII characters so it cannot be read to a string if `LANG` is unset which defaults to `POSIX` (at least on my system). I probably went overboard by setting it into every python container as some might not actually require it, but I feel like everyone would expect a UTF-8 locale to be set.
Eijebong
added a commit
to mozilla-releng/balrog
that referenced
this pull request
Jun 24, 2025
Python 3.13 dropped that in docker-library/python#895 Without this, running balrog locally results in ``` balrogadmin-1 | File "/app/uwsgi/admin.wsgi", line 74, in <module> balrogadmin-1 | from auslib.web.admin.base import app as application # noqa balrogadmin-1 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ balrogadmin-1 | File "/app/src/auslib/web/admin/base.py", line 29, in <module> balrogadmin-1 | .add_spec(path.join(current_dir, "swagger/api.yml")) balrogadmin-1 | ~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/specsynthase/specbuilder.py", line 44, in add_spec balrogadmin-1 | spec = self._load_spec(file_name) balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/specsynthase/specbuilder.py", line 13, in _load_spec balrogadmin-1 | return yaml.load(spec_file, Loader=yaml.FullLoader) balrogadmin-1 | ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/yaml/__init__.py", line 79, in load balrogadmin-1 | loader = Loader(stream) balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/yaml/loader.py", line 24, in __init__ balrogadmin-1 | Reader.__init__(self, stream) balrogadmin-1 | ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^ balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/yaml/reader.py", line 85, in __init__ balrogadmin-1 | self.determine_encoding() balrogadmin-1 | ~~~~~~~~~~~~~~~~~~~~~~~^^ balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/yaml/reader.py", line 124, in determine_encoding balrogadmin-1 | self.update_raw() balrogadmin-1 | ~~~~~~~~~~~~~~~^^ balrogadmin-1 | File "/usr/local/lib/python3.13/site-packages/yaml/reader.py", line 178, in update_raw balrogadmin-1 | data = self.stream.read(size) balrogadmin-1 | File "/usr/local/lib/python3.13/encodings/ascii.py", line 26, in decode balrogadmin-1 | return codecs.ascii_decode(input, self.errors)[0] balrogadmin-1 | ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^ balrogadmin-1 | UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 773: ordinal not in range(128) balrogadmin-1 exited with code 22 ``` Because our swagger config contains some non ASCII characters so it cannot be read to a string if `LANG` is unset which defaults to `POSIX` (at least on my system). I probably went overboard by setting it into every python container as some might not actually require it, but I feel like everyone would expect a UTF-8 locale to be set.
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This is mostly to update the
LANGnote to clarify why it still cannot be removed. The also reattempts #570 but in a much more limited way (only 3.13+). 3.13 is still only an alpha so it should be safer to change there.Happy to not remove
LANGin 3.13+ if we only want to update the note. This can wait until the new year so that any users testing3.13.0a2don't break over the holidays.Fixes #887