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@@ -0,0 +1,79 @@
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+#!/bin/bash
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+
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+# Exit immediately if a command returns a non-zero status.
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+set -e
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+
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+################
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+# Homebrew setup
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+################
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+
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+# There's a homebrew bug which causes brew update to fail the first time. Run
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+# it twice to workaround. https://github.com/Homebrew/homebrew/issues/42553
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+brew update || brew update
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+
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+# List of homebrew formulae to install in the order they appear.
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+# We require CMake and Ninja for our build and tests, and all the others are
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+# dependencies of pyenv.
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+REQUIREMENTS="cmake
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+ ninja
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+ readline
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+ autoconf
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+ pkg-config
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+ openssl"
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+
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+# Install CMake, Ninja, and pyenv dependencies.
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+for pkg in $REQUIREMENTS; do
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+ # Install package, or upgrade it if it is already installed.
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+ brew install $pkg || brew outdated $pkg || brew upgrade $pkg
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+done
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+
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+##############
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+# Python setup
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+##############
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+
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+PYENV_ROOT="${HOME}/.pyenv"
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+
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+if [ ! -d "${PYENV_ROOT}/.git" ]; then
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+ rm -rf ${PYENV_ROOT}
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+ git clone https://github.com/yyuu/pyenv.git ${PYENV_ROOT}
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+fi
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+pushd ${PYENV_ROOT}
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+git fetch --tags
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+git checkout v1.2.1
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+popd
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+
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+PATH="${PYENV_ROOT}/bin:${PATH}"
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+
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+eval "$(pyenv init -)"
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+
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+if [ "${YCMD_PYTHON_VERSION}" == "2.7" ]; then
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+ # We need a recent enough version of Python 2.7 on macOS or an error occurs
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+ # when installing the psutil dependency for our tests.
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+ PYENV_VERSION="2.7.8"
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+else
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+ PYENV_VERSION="3.3.6"
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+fi
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+
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+# In order to work with ycmd, python *must* be built as a shared library. The
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+# most compatible way to do this on macOS is with --enable-framework. This is
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+# set via the PYTHON_CONFIGURE_OPTS option.
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+export PYTHON_CONFIGURE_OPTS="--enable-framework"
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+
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+pyenv install --skip-existing ${PYENV_VERSION}
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+pyenv rehash
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+pyenv global ${PYENV_VERSION}
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+
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+# Initialize pyenv in other steps. See
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+# https://circleci.com/docs/2.0/env-vars/#interpolating-environment-variables-to-set-other-environment-variables
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+# and https://github.com/pyenv/pyenv/issues/264
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+echo "export PATH=${PYENV_ROOT}/bin:\$PATH
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+if [ -z \"\${PYENV_LOADING}\" ]; then
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+ export PYENV_LOADING=true
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+ eval \"\$(pyenv init -)\"
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+ unset PYENV_LOADING
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+fi" >> $BASH_ENV
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+
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+pip install -U pip wheel setuptools
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+pip install -r python/test_requirements.txt
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+
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+set +e
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micbou