34 lines
916 B
Bash
34 lines
916 B
Bash
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#!/usr/bin/env bash
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# This script prints the version suffix of the most suitable version of Python
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# for building docs that's installed in this system.
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#
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# Caller can safely append this suffix to `python` or `pip` and expect the
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# binary to exist.
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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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# 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 "3"
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exit 0
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fi
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# check `python3.N` from newest to oldest
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CANDIDATE_SUFFIXES=("3.11" "3.10" "3.9" "3.8")
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for SUFFIX in ${CANDIDATE_SUFFIXES[@]}; do
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# if both `python3.N` and `pip3.N` are available, use that
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if which "python$SUFFIX" 1>/dev/null 2>&1 && \
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which "pip$SUFFIX" 1>/dev/null 2>&1; then
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echo "$SUFFIX"
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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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exit 1
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