Solved the problem that MacVim installed by Homebrew was not built by python of pyenv

It's an ad hoc solution. I think the details are wrong, but for the time being, this worked, so I will summarize it. Please let me know if there is a good or correct method.

It is an article that saves those who are worried about such problems

MacVim is built with Python from system or Homebrew instead of Python from pyenv
If you do not install python3 with Homebrew, it will not be + python / dyn + python3 / dyn
After installing with brew install python3 and --with-properly-linked-python2-python3, when you open the python file, Segmentaion fault

MacVim installation instructions

Tap the macvim repository

brew install macvim only installs the pre-built one, so get the source code from the macvim repository and build and install it.

$ brew tap macvim-dev/macvim

Install pyenv Python with DLL

If you install normally with pyenv, the DLL required to build MacVim will not be created, so add the following environment variables and build. python3 gives an error such as -undefined dynamic_lookup is missing and pip install greenlet.

** Change the version number to the one you are using. ** **

PYTHON_CONFIGURE_OPTS="--enable-shared" \
    LDSHARED="clang -bundle" \
    LDCXXSHARED="clang++ -bundle" \
    BLDSHARED="clang -bundle -lpython2.7" \
    pyenv install 2.7.12

PYTHON_CONFIGURE_OPTS="--enable-shared" \
    LDSHARED="clang -undefined dynamic_lookup　-bundle"\
    LDCXXSHARED="clang++ -undefined dynamic_lookup　-bundle" \
    BLDSHARED="clang -bundle -undefined dynamic_lookup　-lpython3.5m" \
    pyenv install 3.5.2

Change build settings with brew edit

Since the build argument is set in the source code, rewrite the source code with brew edit. (It took me a day to notice because I'm new to brew.)

$ brew edit macvim-dev/macvim/macvim

The Ruby code will be displayed, so change the def install at the top. The commented out part is the default value. Since you can only see Python3 installed by Homebrew, change the path to refer to Python3 of pyenv. Since python2 also tries to refer to the MacOS System library, add variables and paths so that python2 also refers to python2 in pyenv. ** Change the enushi part to your own username. ** **

  def install
    perl_version = '5.16'
    ENV.append 'VERSIONER_PERL_VERSION', perl_version
    ENV.append 'VERSIONER_PYTHON_VERSION', '2.7'
    ENV.append 'vi_cv_path_python', "/Users/enushi/.pyenv/versions/2.7.10/bin/python2"
    ENV.append 'vi_cv_path_python3', "/Users/enushi/.pyenv/versions/3.4.3/bin/python3"
    ENV.append 'vi_cv_path_plain_lua', "#{HOMEBREW_PREFIX}/bin/lua"
    ENV.append 'vi_cv_dll_name_perl', "/System/Library/Perl/#{perl_version}/darwin-thread-multi-2level/CORE/libperl.dylib"
    ENV.append 'vi_cv_dll_name_python3', "/Users/enushi/.pyenv/versions/3.4.3/lib/libpython3.4m.dylib"
    ENV.append 'vi_cv_dll_name_python', "/Users/enushi/.pyenv/versions/2.7.10/lib/libpython2.7.dylib"
    #ENV.append 'vi_cv_path_python3', "#{HOMEBREW_PREFIX}/bin/python3"
    #ENV.append 'vi_cv_path_plain_lua', "#{HOMEBREW_PREFIX}/bin/lua"
    #ENV.append 'vi_cv_dll_name_perl', "/System/Library/Perl/#{perl_version}/darwin-thread-multi-2level/CORE/libperl.dylib"
    #ENV.append 'vi_cv_dll_name_python3', "#{HOMEBREW_PREFIX}/Frameworks/Python.framework/Versions/3.5/Python"

Install MacVim

--with-properly-linked-python2-python3 is required. --with-override-system-vim is an option that replaces the default vim (vim running on the console) in the OS with mvim -v. Use it as you like.

brew install --HEAD --with-properly-linked-python2-python3 --with-override-system-vim macvim-dev/macvim/macvim

Confirmation after installation

Start mvim and execute the following command.

:python print(sys.path)
:py3 print(sys.path)

The output path should be pyenv's python. Also, if it can be executed continuously, the effect of --with-properly-linked-python2-python3 is obtained.

reference

Well then. Happy Vim Life