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Adding setup for git executable#640

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Byron merged 11 commits intogitpython-developers:masterfrom
kenodegard:adding_setup_for_git_executable
Sep 28, 2017
Merged

Adding setup for git executable#640
Byron merged 11 commits intogitpython-developers:masterfrom
kenodegard:adding_setup_for_git_executable

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@kenodegard kenodegard commented Jul 9, 2017

Added a convenience function called refresh. This functions accomplishes 2 things.

The first is that now the user can dynamically set the git path AFTER importing GitPython. In the following example git is neither on the user's $PATH nor is $GIT_PYTHON_GIT_EXECUTABLE defined:

>>> import git
WARNING: Bad git executable. The git executable must be specified in one of the following ways:
    (1) be included in your $PATH, or
    (2) be set via $GIT_PYTHON_GIT_EXECUTABLE, or
    (3) explicitly set via git.setup (or git.refresh).

All git commands will error until this is rectified.

>>> git.refresh("/usr/bin/git")
>>> git.Git().version()
'git version 2.11.0 (Apple Git-81)'
>>>

The second is that this also means that the git executable can be dynamically refreshed at any time by simply calling refresh:

>>> import git
>>> git.Git.GIT_PYTHON_GIT_EXECUTABLE
'git'
>>> git.refresh("/usr/bin/git")
>>> git.Git.GIT_PYTHON_GIT_EXECUTABLE
'/usr/bin/git'

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@kenodegard @codecov-io @Byron