fix: Add --install-python=false to install invocation.

The installer may attempt to install a Python package on MacOS,
if the versions do not line up with the minimum version blessed
by the script. To do this, it attempts to run sudo.

This disables the installation with an install flag.

The flag is present in all versions of gcloud since 352.0.0.

Fixes #82.

README.md

@@ -17,6 +17,7 @@
 - [Dependencies](#dependencies)
 - [Install](#install)
 - [Why?](#why)
+- [Supported Versions](#supported-versions)
 - [Default Cloud SDK Components](#default-cloud-sdk-components)
 - [Contributing](#contributing)
 - [License](#license)
@@ -53,6 +54,10 @@ The asdf config file, `.tool-versions`, allows pinning each tool in your project
 
 When you update a version in `.tool-versions`, `asdf` will prompt all users who do not have the correct versions to upgrade. This enables whole teams to update their tools in unison.
 
+# Supported Versions
+
+gcloud releases from 352.0.0 and higher can be installed.
+
 # Default Cloud SDK Components
 
 `asdf-gcloud` can automatically install a set of Cloud SDK Components after each `asdf install gcloud <version>`. To enable this feature you must have a file that lists one COMPONENT_ID per line. For example:

bin/install

@@ -32,7 +32,7 @@ install_gcloud() {
 	log_success "extracted!"
 
 	log_info "🚧  installing..."
-	"${ASDF_INSTALL_PATH}/install.sh" --usage-reporting=false --path-update=false --quiet
+	"${ASDF_INSTALL_PATH}/install.sh" --usage-reporting=false --path-update=false --install-python=false --quiet
 	# test executable
 	test -x "${ASDF_INSTALL_PATH}/bin/gcloud" || log_failure_and_exit "Expected ${ASDF_INSTALL_PATH}/bin/gcloud to be executable."
 	log_success "gcloud ${ASDF_INSTALL_VERSION} installed!"