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Fail on a multiline distribution package summary #2870

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merged 5 commits into from
Nov 13, 2021
Merged

Fail on a multiline distribution package summary #2870

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f8fe4a8
Fail on a multiline distribution package summary
webknjaz Nov 11, 2021
818fdb9
Add a change note for PR #2870
webknjaz Nov 11, 2021
65d6653
Fix the word "breaks" in the change note
webknjaz Nov 12, 2021
a4b7cae
Restore single_line as a simple, universal validator.
jaraco Nov 13, 2021
25d1d54
Change is backward-incompatible for projects with newlines in the sum…
jaraco Nov 13, 2021
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1 change: 1 addition & 0 deletions changelog.d/2870.breaking.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Started failing on invalid inline description with line breaks :class:`ValueError` -- by :user:`webknjaz`
8 changes: 4 additions & 4 deletions setuptools/dist.py
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Expand Up @@ -145,11 +145,11 @@ def read_pkg_file(self, file):


def single_line(val):
# quick and dirty validation for description pypa/setuptools#1390
"""Validate that the value does not have line breaks."""
# Ref: https://github.com/pypa/setuptools/issues/1390
if '\n' in val:
# TODO after 2021-07-31: Replace with `raise ValueError("newlines not allowed")`
warnings.warn("newlines not allowed and will break in the future")
val = val.replace('\n', ' ')
raise ValueError('Newlines are not allowed')
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The problem with this wording is that it doesn't help figure out what's wrong. When I saw a warning in the middle of the console output, the only way to understand what it was, was to read the source code. This is not the best UX, is it?

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Indeed, it's not the best user experience. But I expect these errors to be rare. Also, now that they're raised as an exception (or if you'd passed -We), you'll see the traceback, which does point to single_line(self.get_description()), which does indicate where the error is.


return val


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