mirror of
https://github.com/eth-p/bat-extras.git
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80 lines
2.0 KiB
Bash
80 lines
2.0 KiB
Bash
#!/usr/bin/env bash
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# -----------------------------------------------------------------------------
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# bat-extras | Copyright (C) 2019 eth-p | MIT License
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#
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# Repository: https://github.com/eth-p/bat-extras
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# Issues: https://github.com/eth-p/bat-extras/issues
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# -----------------------------------------------------------------------------
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# Gets the current bat version.
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bat_version() {
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if [[ -z "${__BAT_VERSION}" ]]; then
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__BAT_VERSION="$(command "$EXECUTABLE_BAT" --version | cut -d ' ' -f 2)"
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fi
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echo "${__BAT_VERSION}"
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}
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# Compares two version strings.
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# Arguments:
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# 1 -- The version to compare.
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# 2 -- The comparison operator (same as []).
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# 3 -- The version to compare with.
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version_compare() {
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local version="$1"
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local compare="$3"
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if ! [[ "$version" =~ \.$ ]]; then
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version="${version}."
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fi
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if ! [[ "$compare" =~ \.$ ]]; then
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compare="${compare}."
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fi
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version_compare__recurse "$version" "$2" "$compare"
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return $?
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}
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version_compare__recurse() {
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local version="$1"
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local operator="$2"
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local compare="$3"
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# Extract the leading number.
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local v_major="${version%%.*}"
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local c_major="${compare%%.*}"
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# Extract the remaining numbers.
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local v_minor="${version#*.}"
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local c_minor="${compare#*.}"
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# Compare the versions specially if the final number has been reached.
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if [[ -z "$v_minor" && -z "$c_minor" ]]; then
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[ "$v_major" $operator "$c_major" ];
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return $?
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fi
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# Insert zeroes where there are missing numbers.
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if [[ -z "$v_minor" ]]; then
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v_minor="0."
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fi
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if [[ -z "$c_minor" ]]; then
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c_minor="0."
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fi
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# Compare the versions.
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# This is an early escape case.
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case "$operator" in
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-eq) [[ "$v_major" -ne "$c_major" ]] && return 1 ;;
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-ne) [[ "$v_major" -ne "$c_major" ]] && return 0 ;;
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-ge | -gt) [[ "$v_major" -lt "$c_major" ]] && return 1
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[[ "$v_major" -gt "$c_major" ]] && return 0 ;;
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-le | -lt) [[ "$v_major" -gt "$c_major" ]] && return 1
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[[ "$v_major" -lt "$c_major" ]] && return 0 ;;
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esac
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version_compare__recurse "$v_minor" "$operator" "$c_minor"
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}
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