Homebrew doesn't upgrade pip / distribute on Python upgrade

[oryband]

If you upgrade to Python 2.7.5 from 2.7.3 for example, the pip script still points to 2.7.3 instead of pointing to 2.7.5. This should be done automatically.

[adamv]

Duplicate of #19047?

[oryband]

Maybe, but I fixed it locally pretty easily - just changed the link in pip script from 2.7.3 to 2.7.5.

[jbeezley]

I was having a similar issue before I posted #19047. The old pip script was not removed from /usr/local/share/python on upgrade, so I removed it manually. Now, it seems to install to /usr/local/bin instead, so maybe you have the old path first in your PATH first.

[samueljohn]

Sorry for the inconvenience. Will be fixed by #18588 which I hope to ready soon. As you can see there, a few formulae have to be checked and adapted by me before I can push that.

In short: pip will be put into the /usr/local/Cellar/python/2.7.5/bin and symlinked from there to /usr/local/bin and therefore will be removed/upgrade correctly.

[ssbanerje]

I am having the same problem on the latest version of homebrew.
I do not know if this is related, but I cant start the brewed macvim from the command line when the homebrew version of python is linked. If I do a brew unlink python, everything works perfectly.

[samueljohn]

@oryband and @jbeezley Okay, I pushed 0b50110, which fixes the issues of upgrading pip/distribute (hopefully) because pip is installed into $(brew --prefix)/bin now. So it remains in the Cellar and therefore will be upgrade. If you still have trouble, try deleting the old pip/distribute in $(brew --prefix)/lib/python2.7/site-packages. Note that share/python does no longer need to be in the PATH from now on, because python scripts go into brew --prefix, too.

@subszero MacVim should work now also. At least on my Mac. If you still have trouble, please open a separate issue. I can call :python print("it works") in MacVim successfully with brewed python 2.7.5.

I suggest to brew rm python macvim and then brew install python and brew install macvim (with the options you like). MacVim should also work with system python.

[oryband]

@samueljohn pip/distribute was indeed linked correctly, but I'm still getting ABRT trap 6 when using macvim with YouCompleteMe plugin (for example). This is related to macvim not linking to homebrew's Python I think.

I had to brew unlink python in order to make macvim work, and not crash. So for now I'm still back to system python.

Please re-open.

See #20075 , this, and this (external issues).

[ssbanerje]

@samueljohn I tried this and it doesn't seem to be working after the 2.7.5 update for python. Before that, I had followed the same procedure to solve the problem.

[oryband]

@subszero check the links in my post above you, Macvim still links to system Python. This is a Macvim bug that should be fixed I suppose. I think @samueljohn is on it. In the meanwhile you should brew unlink python to make Macvim work propely.

[samueljohn]

For the record: MacVim works now with a brewed python to, but we had to be pretty harsh in persuading it to do so. In the --HEAD version, MacVim still does not like to use the brewed python. This is a upstream issue, since we cannot do more than setting some vars or adding flags to ./configure.