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|
#!/usr/bin/env bash
#
# Summary: Set or show the shell-specific Python version
#
# Usage: pyenv shell <version>...
# pyenv shell -
# pyenv shell --unset
#
# Sets a shell-specific Python version by setting the `PYENV_VERSION'
# environment variable in your shell. This version overrides local
# application-specific versions and the global version.
#
# <version> should be a string matching a Python version known to pyenv.
# The special version string `system' will use your default system Python.
# Run `pyenv versions' for a list of available Python versions.
#
# When `-` is passed instead of the version string, the previously set
# version will be restored. With `--unset`, the `PYENV_VERSION`
# environment variable gets unset, restoring the environment to the
# state before the first `pyenv shell` call.
set -e
[ -n "$PYENV_DEBUG" ] && set -x
# Provide pyenv completions
if [ "$1" = "--complete" ]; then
echo --unset
echo system
exec pyenv-versions --bare
fi
versions=("$@")
shell="$(basename "${PYENV_SHELL:-$SHELL}")"
if [ -z "$versions" ]; then
if [ -z "$PYENV_VERSION" ]; then
echo "pyenv: no shell-specific version configured" >&2
exit 1
else
echo 'echo "$PYENV_VERSION"'
exit
fi
fi
if [ "$versions" = "--unset" ]; then
case "$shell" in
fish )
echo 'set -gu PYENV_VERSION_OLD "$PYENV_VERSION"'
echo "set -e PYENV_VERSION"
;;
* )
echo 'PYENV_VERSION_OLD="${PYENV_VERSION-}"'
echo "unset PYENV_VERSION"
;;
esac
exit
fi
if [ "$versions" = "-" ]; then
case "$shell" in
fish )
cat <<EOS
if set -q PYENV_VERSION_OLD
if [ -n "\$PYENV_VERSION_OLD" ]
set PYENV_VERSION_OLD_ "\$PYENV_VERSION"
set -gx PYENV_VERSION "\$PYENV_VERSION_OLD"
set -gu PYENV_VERSION_OLD "\$PYENV_VERSION_OLD_"
set -e PYENV_VERSION_OLD_
else
set -gu PYENV_VERSION_OLD "\$PYENV_VERSION"
set -e PYENV_VERSION
end
else
echo "pyenv: PYENV_VERSION_OLD is not set" >&2
false
end
EOS
;;
* )
cat <<EOS
if [ -n "\${PYENV_VERSION_OLD+x}" ]; then
if [ -n "\$PYENV_VERSION_OLD" ]; then
PYENV_VERSION_OLD_="\$PYENV_VERSION"
export PYENV_VERSION="\$PYENV_VERSION_OLD"
PYENV_VERSION_OLD="\$PYENV_VERSION_OLD_"
unset PYENV_VERSION_OLD_
else
PYENV_VERSION_OLD="\$PYENV_VERSION"
unset PYENV_VERSION
fi
else
echo "pyenv: PYENV_VERSION_OLD is not set" >&2
false
fi
EOS
;;
esac
exit
fi
# Make sure the specified version is installed.
if pyenv-prefix "${versions[@]}" >/dev/null; then
OLDIFS="$IFS"
IFS=: version="${versions[*]}"
IFS="$OLDIFS"
if [ "$version" != "$PYENV_VERSION" ]; then
case "$shell" in
fish )
echo 'set -gu PYENV_VERSION_OLD "$PYENV_VERSION"'
echo "set -gx PYENV_VERSION \"$version\""
;;
* )
echo 'PYENV_VERSION_OLD="${PYENV_VERSION-}"'
echo "export PYENV_VERSION=\"${version}\""
;;
esac
fi
else
echo "false"
exit 1
fi
|
