Shebang length exceeded in pip executable

[rmb938]

See the following issue on pip: pypa/pip#1773

The accepted solution seems to be running the following:

/some/path/to/python -m pip

I would make a PR but I am not sure on how you want to go about supporting that.

[sjkingo]

An interesting problem that I'd never considered. Have you run into this personally?

If we could have some tests that show it breaks with paths longer than BINPRM_BUF_SIZE, and changing the invocation of pip to run as a module doesn't break anything, that should be OK.

Could we just change _pip_rpath() to instead search for the python executable and return that + ['-m', 'pip']?

[rmb938]

Yea, I am running into it while testing an application in jenkins that just happens to have really long path names.

I can get those changes in and a pull request made.

[sjkingo]

Awesome, thank you Ryan. I have released version 2.1.13 that includes this fix.