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plugins: Pin pip to supported versions #3429

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Jan 26, 2021
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7 changes: 6 additions & 1 deletion snapcraft/plugins/_python/_pip.py
Original file line number Diff line number Diff line change
Expand Up @@ -184,7 +184,12 @@ def _ensure_pip_installed(self):
self.__python_home = os.path.join(os.path.sep, "usr")

# Using the host's pip, install our own pip
self.download({"pip"})
# pip >=21 no longer support python3.5 or python 2 and if
# used will result in a broken install with pip unable to
# install packages.
self.download(
{'pip; python_version >= "3.6"', 'pip<21; python_version < "3.6"'}
)
self.install({"pip"}, ignore_installed=True)
finally:
# Now that we have our own pip, reset the python home
Expand Down