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All scripts in libexec/ (excluding pyenv) are called through pyenv, therefore the shebang lines are not necessary. On some systems this provides a measurable increase in performance of the shell prompt. Related to pyenv/pyenv-virtualenv#259
119 lines
2.8 KiB
Text
Executable file
119 lines
2.8 KiB
Text
Executable file
# Summary: Set or show the shell-specific Python version
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#
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# Usage: pyenv shell <version>...
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# pyenv shell -
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# pyenv shell --unset
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#
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# Sets a shell-specific Python version by setting the `PYENV_VERSION'
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# environment variable in your shell. This version overrides local
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# application-specific versions and the global version.
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#
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# <version> should be a string matching a Python version known to pyenv.
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# The special version string `system' will use your default system Python.
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# Run `pyenv versions' for a list of available Python versions.
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#
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# When `-` is passed instead of the version string, the previously set
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# version will be restored. With `--unset`, the `PYENV_VERSION`
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# environment variable gets unset, restoring the environment to the
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# state before the first `pyenv shell` call.
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set -e
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[ -n "$PYENV_DEBUG" ] && set -x
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# Provide pyenv completions
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if [ "$1" = "--complete" ]; then
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echo --unset
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echo system
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exec pyenv-versions --bare
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fi
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versions=("$@")
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shell="$(basename "${PYENV_SHELL:-$SHELL}")"
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if [ -z "$versions" ]; then
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if [ -z "$PYENV_VERSION" ]; then
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echo "pyenv: no shell-specific version configured" >&2
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exit 1
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else
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echo 'echo "$PYENV_VERSION"'
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exit
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fi
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fi
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if [ "$versions" = "--unset" ]; then
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case "$shell" in
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fish )
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echo 'set -gu PYENV_VERSION_OLD "$PYENV_VERSION"'
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echo "set -e PYENV_VERSION"
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;;
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* )
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echo 'PYENV_VERSION_OLD="$PYENV_VERSION"'
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echo "unset PYENV_VERSION"
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;;
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esac
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exit
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fi
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if [ "$versions" = "-" ]; then
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case "$shell" in
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fish )
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cat <<EOS
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if set -q PYENV_VERSION_OLD
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if [ -n "\$PYENV_VERSION_OLD" ]
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set PYENV_VERSION_OLD_ "\$PYENV_VERSION"
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set -gx PYENV_VERSION "\$PYENV_VERSION_OLD"
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set -gu PYENV_VERSION_OLD "\$PYENV_VERSION_OLD_"
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set -e PYENV_VERSION_OLD_
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else
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set -gu PYENV_VERSION_OLD "\$PYENV_VERSION"
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set -e PYENV_VERSION
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end
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else
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echo "pyenv: PYENV_VERSION_OLD is not set" >&2
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false
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end
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EOS
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;;
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* )
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cat <<EOS
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if [ -n "\${PYENV_VERSION_OLD+x}" ]; then
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if [ -n "\$PYENV_VERSION_OLD" ]; then
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PYENV_VERSION_OLD_="\$PYENV_VERSION"
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export PYENV_VERSION="\$PYENV_VERSION_OLD"
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PYENV_VERSION_OLD="\$PYENV_VERSION_OLD_"
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unset PYENV_VERSION_OLD_
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else
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PYENV_VERSION_OLD="\$PYENV_VERSION"
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unset PYENV_VERSION
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fi
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else
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echo "pyenv: PYENV_VERSION_OLD is not set" >&2
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false
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fi
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EOS
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;;
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esac
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exit
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fi
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# Make sure the specified version is installed.
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if pyenv-prefix "${versions[@]}" >/dev/null; then
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OLDIFS="$IFS"
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IFS=: version="${versions[*]}"
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IFS="$OLDIFS"
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if [ "$version" != "$PYENV_VERSION" ]; then
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case "$shell" in
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fish )
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echo 'set -gu PYENV_VERSION_OLD "$PYENV_VERSION"'
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echo "set -gx PYENV_VERSION \"$version\""
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;;
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* )
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echo 'PYENV_VERSION_OLD="$PYENV_VERSION"'
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echo "export PYENV_VERSION=\"${version}\""
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;;
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esac
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fi
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else
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echo "false"
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exit 1
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fi
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