47 lines
1.3 KiB
Bash
Executable File
47 lines
1.3 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Synopsis:
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# - get-python-bin.sh python
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# - get-python-bin.sh pip
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#
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# This script selects the most suitable `python` / `pip` binary available
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# for building docs that's installed in this system.
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#
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# If no usable version of Python is available, this script will exit with a
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# non-zero code.
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set -e
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case "$1" in
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"python" | "pip")
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BIN_PREFIX="$1"
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;;
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*)
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echo "Incorrect usage" >&2
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exit 1
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;;
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esac
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# if `python3` is >= 3.8 and `pip3` is available, use that
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if echo -e "import sys\nif sys.version_info < (3,8):\n exit(1)" | python3 && \
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which pip3 1>/dev/null 2>&1; then
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echo "${BIN_PREFIX}3"
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exit 0
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fi
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# list all available `python3.N`, then use the newest that passes checks
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# compgen is bash-specific, but we asked for bash in shebang so it's fine
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MINOR_VERSION_CANDIDATES=$(compgen -c | grep -P '^python3\.[0-9]+$' | sed 's/python3\.//' | awk 'int($NF) >= 8' | sort -nr)
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for MINOR in ${MINOR_VERSION_CANDIDATES[@]}; do
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# if both `python3.N` and `pip3.N` are available, use that
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if which "python3.${MINOR}" 1>/dev/null 2>&1 && \
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which "pip3.${MINOR}" 1>/dev/null 2>&1; then
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echo "${BIN_PREFIX}3.${MINOR}"
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exit 0
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fi
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done
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# none found
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echo "No suitable version of Python found" >&2
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exit 2
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