mirror of
https://github.com/kennethreitz/heroku-buildpack-python.git
synced 2026-06-05 15:00:19 +00:00
Ed Morley
71aef447a6
Switches the last consumers of it to a simpler utility function that uses `pkgutil.find_loader()`: https://docs.python.org/3/library/pkgutil.html#pkgutil.find_loader Both of these consumers are covered by existing tests. Then removes `sp-grep` and the remaining parts of `pip-pop`. Closes @W-8208817@.
107 lines
2.6 KiB
Bash
Executable File
107 lines
2.6 KiB
Bash
Executable File
#!/usr/bin/env bash
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shopt -s extglob
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shopt -s nullglob
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# This is necessary since this script is sometimes sourced from
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# subshells that don't have the variables from bin/compile.
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# Remove this once we no longer wrap all the things in `sub_env`.
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BIN_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
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ROOT_DIR=$(dirname "${BIN_DIR}")
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# shellcheck source=vendor/buildpack-stdlib_v8.sh
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source "${ROOT_DIR}/vendor/buildpack-stdlib_v8.sh"
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if [ "$(uname)" == Darwin ]; then
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sed() { command sed -l "$@"; }
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else
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sed() { command sed -u "$@"; }
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fi
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# Syntax sugar.
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indent() {
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sed "s/^/ /"
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}
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# Clean up pip output
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cleanup() {
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sed -e 's/\.\.\.\+/.../g' | sed -e '/already satisfied/Id' | sed -e '/No files were found to uninstall/Id' | sed -e '/Overwriting/Id' | sed -e '/python executable/Id' | sed -e '/no previously-included files/Id'
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}
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# Buildpack Steps.
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puts-step() {
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echo "-----> $*"
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}
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# Buildpack Warnings.
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puts-warn() {
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echo " ! $*"
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}
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# Does some serious copying.
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deep-cp() {
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declare source="$1" target="$2"
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mkdir -p "$target"
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# cp doesn't like being called without source params,
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# so make sure they expand to something first.
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# subshell to avoid surprising caller with shopts.
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(
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shopt -s nullglob dotglob
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set -- "$source"/!(tmp|.|..)
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[[ $# == 0 ]] || cp -a "$@" "$target"
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)
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}
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# Measure the size of the Python installation.
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measure-size() {
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echo "$(du -s .heroku/python 2>/dev/null || echo 0) | awk '{print $1}')"
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}
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# Python version operator >
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version_gt() {
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test "$(printf '%s\n' "$@" | sort -V | head -n 1)" != "$1";
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}
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# Python verison operator >=
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version_gte() {
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if [ "$1" == "$2" ]; then
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return 0
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fi
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version_gt "$1" "$2"
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}
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# Check if Python 2
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python2_check() {
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VERSION="$1"
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version_gte "$VERSION" "python-2.7.0" && version_gt "python-3.0.0" "$VERSION"
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}
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# Check if Python 3
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python3_check() {
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VERSION="$1"
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version_gte "$VERSION" "python-3.0.0" && version_gt "python-4.0.0" "$VERSION"
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}
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# Check if Python version needs to install SQLite3
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python_sqlite3_check() {
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VERSION="$1"
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MIN_PYTHON_3="python-3.5.6"
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MIN_PYTHON_2="python-2.7.15"
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( python2_check "$VERSION" && version_gte "$VERSION" "$MIN_PYTHON_2" ) \
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|| ( python3_check "$VERSION" && version_gte "$VERSION" "$MIN_PYTHON_3" )
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}
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is_module_available() {
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# Returns 0 is the specified module exists, otherwise returns 1.
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# Uses pkgutil rather than pkg_resources or pip's CLI, since pkgutil exists
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# in the stdlib, and doesn't depend on the choice of package manager.
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local module_name="${1}"
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python -c "import sys, pkgutil; sys.exit(0 if pkgutil.find_loader('${module_name}') else 1)"
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}
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