mirror of
https://github.com/jimeh/tmuxifier.git
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72 lines
1.8 KiB
Bash
Executable File
72 lines
1.8 KiB
Bash
Executable File
#! /usr/bin/env bash
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shopt -s extglob
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[ -n "$TMUXIFIER_DEBUG" ] && set -x
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# Load internal utility functions.
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source "$TMUXIFIER/lib/util.sh"
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# Provide tmuxifier help
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if calling-help "$@"; then
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echo "usage: tmuxifier tmux-version [<target-version>]
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Outputs current Tmux version. If given optional target-version it outputs one
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of three possible characters indicating if the current Tmux version number is
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equal to, less than, or greater than the <target-version>.
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The three possible outputs are \"=\", \"<\", and \">\"."
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exit
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fi
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# The vercomp() function is shamelessly ripped/borrowed from the following
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# StackOverflow answer: http://stackoverflow.com/a/4025065/42146
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vercomp() {
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if [[ "$1" == "$2" ]]; then return 0; fi
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local IFS=.
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# shellcheck disable=SC2206
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local i ver1=($1) ver2=($2)
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# fill empty fields in ver1 with zeros
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for ((i = ${#ver1[@]}; i < ${#ver2[@]}; i++)); do ver1[i]=0; done
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for ((i = 0; i < ${#ver1[@]}; i++)); do
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# fill empty fields in ver2 with zeros
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if [[ -z ${ver2[i]} ]]; then ver2[i]=0; fi
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if ((10#${ver1[i]} > 10#${ver2[i]})); then
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return 1
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elif ((10#${ver1[i]} < 10#${ver2[i]})); then
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return 2
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fi
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done
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return 0
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}
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version=$(tmux -V)
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version=${version/tmux /}
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# Fix for tmux next-* versions
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version=${version/next-/}
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if [ -z "$1" ]; then
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echo "$version"
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exit
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fi
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if [ "$version" == "master" ]; then
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# When version string is "master", tmux was compiled from source, and we
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# assume it's later than whatever the <target-version> is.
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echo '>'
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else
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# Fix for "1.9a" version comparison, as vercomp() can only deal with
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# purely numeric version numbers.
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version=${version//+([a-zA-Z])/}
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vercomp "$version" "$1"
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case $? in
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0) echo '=' ;;
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1) echo '>' ;;
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2) echo '<' ;;
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esac
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fi
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