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`pip install`'s standard behaviour is to satisfy the new requirement, even if it conflicts with existing packages. If a conflict _does_ occur, `pip` will simply warn about it after the installation has already damaged the environment. By using the `--constraint` feature, we force `pip` to consider already-installed packages before installing new ones. If a conflict is detected, an error is raised and `pip` stops without damaging the environment. Since we're capturing system packages (when needed) with this feature, we can now allow virtualenvs that do pip-installations to safely work with system-using Mach environments. Differential Revision: https://phabricator.services.mozilla.com/D126925 |
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| .. | ||
| devtools/migrate-l10n | ||
| docs | ||
| gdbpp/gdbpp | ||
| l10n | ||
| lldbutils | ||
| mach | ||
| mozboot | ||
| mozbuild | ||
| mozlint | ||
| mozperftest | ||
| mozrelease | ||
| mozterm | ||
| mozversioncontrol | ||
| mach_commands.py | ||
| moz.build | ||
| README | ||
This directory contains common Python code. The basic rule is that if Python code is cross-module (that's "module" in the Mozilla meaning - as in "module ownership") and is MPL-compatible, it should go here. What should not go here: * Vendored python modules (use third_party/python instead) * Python that is not MPL-compatible (see other-licenses/) * Python that has good reason to remain close to its "owning" (Mozilla) module (e.g. it is only being consumed from there). Historical information can be found at https://bugzilla.mozilla.org/show_bug.cgi?id=775243 https://bugzilla.mozilla.org/show_bug.cgi?id=1346025