Add additional buildpack metrics

Covering:
- use of outdated Python patch versions
- any occurrences of internal errors

(Split out of the upcoming Python version refactor for easier review)

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## [Unreleased]
 
 - Added support for Python 3.9 on Heroku-24. ([#1656](https://github.com/heroku/heroku-buildpack-python/pull/1656))
+- Added buildpack metrics for use of outdated Python patch versions and occurrences of internal errors. ([#1657](https://github.com/heroku/heroku-buildpack-python/pull/1657))
 - Improved the robustness of buildpack error handling by enabling `inherit_errexit`. ([#1655](https://github.com/heroku/heroku-buildpack-python/pull/1655))
 
 ## [v258] - 2024-10-01

bin/compile

@@ -137,8 +137,8 @@ else
 	CACHED_PYTHON_STACK=$STACK
 fi
 
-PACKAGE_MANAGER=$(package_manager::determine_package_manager "${BUILD_DIR}")
-meta_set "package_manager" "${PACKAGE_MANAGER}"
+package_manager=$(package_manager::determine_package_manager "${BUILD_DIR}")
+meta_set "package_manager" "${package_manager}"
 
 # Pipenv Python version support.
 # Detect the version of Python requested from a Pipfile (e.g. python_version or python_full_version).
@@ -189,7 +189,7 @@ meta_time "python_install_duration" "${install_python_start_time}"
 # Install the package manager and related tools.
 package_manager_install_start_time=$(nowms)
 bundled_pip_module_path="$(utils::bundled_pip_module_path "${BUILD_DIR}")"
-case "${PACKAGE_MANAGER}" in
+case "${package_manager}" in
 	pip)
 		pip::install_pip_setuptools_wheel "${bundled_pip_module_path}"
 		;;
@@ -199,7 +199,7 @@ case "${PACKAGE_MANAGER}" in
 		pipenv::install_pipenv
 		;;
 	*)
-		utils::abort_internal_error "Unhandled package manager"
+		utils::abort_internal_error "Unhandled package manager: ${package_manager}"
 		;;
 esac
 meta_time "package_manager_install_duration" "${package_manager_install_start_time}"
@@ -214,15 +214,15 @@ meta_time "sqlite_install_duration" "${install_sqlite_start_time}"
 
 # Install app dependencies.
 dependencies_install_start_time=$(nowms)
-case "${PACKAGE_MANAGER}" in
+case "${package_manager}" in
 	pip)
 		pip::install_dependencies
 		;;
 	pipenv)
 		pipenv::install_dependencies
 		;;
 	*)
-		utils::abort_internal_error "Unhandled package manager"
+		utils::abort_internal_error "Unhandled package manager: ${package_manager}"
 		;;
 esac
 meta_time "dependencies_install_duration" "${dependencies_install_start_time}"

bin/report

@@ -86,6 +86,7 @@ ALL_OTHER_FIELDS=(
 	pre_compile_hook
 	pre_compile_hook_duration
 	python_install_duration
+	python_version_outdated
 	setup_py_only
 	sqlite_install_duration
 	total_duration

bin/steps/python

@@ -76,6 +76,9 @@ function warn_if_patch_update_available() {
 		puts-warn "A Python security update is available! Upgrade as soon as possible to: ${latest_patch_version}"
 		puts-warn "See: https://devcenter.heroku.com/articles/python-runtimes"
 		puts-warn
+		meta_set "python_version_outdated" "true"
+	else
+		meta_set "python_version_outdated" "false"
 	fi
 }
 

lib/utils.sh

@@ -29,5 +29,6 @@ function utils::bundled_pip_module_path() {
 function utils::abort_internal_error() {
 	local message="${1}"
 	display_error "Internal error: ${message} (line $(caller || true))."
+	meta_set "failure_reason" "internal-error"
 	exit 1
 }