61 lines
1.5 KiB
Bash
61 lines
1.5 KiB
Bash
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#!/bin/sh -
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#
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# Copyright (c) 2019 joshua stein <jcs@jcs.org>
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#
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# Permission to use, copy, modify, and distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#
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set +o sh
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set -o noglob
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me=`basename $0`
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ver=""
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parsefile() {
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ver=`sed -e 's/^\([0-9]\)\./\1/' -e 's/\..*//' < ${1}`
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}
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# check current-directory, then walk back to /
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dir=$PWD
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while true; do
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if [ -s "${dir}/.ruby-version" ]; then
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parsefile "${dir}/.ruby-version"
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break
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elif [ ! -n "$dir" ]; then
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break
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else
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dir="${dir%/*}"
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fi
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done
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if [[ $ver == "" ]]; then
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# check system-wide /etc/ruby-version
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if [ -s /etc/ruby-version ]; then
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parsefile /etc/ruby-version
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fi
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fi
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if [[ $ver == "" ]]; then
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# otherwise find the newest installed ruby
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set +o noglob
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ver=`echo /usr/local/bin/ruby?? | sort -n | tail -1 | sed 's/.*ruby//'`
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set -o noglob
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fi
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if [[ $ver == "" ]]; then
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echo "can't find a ruby version to use" >/dev/stderr
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exit 1
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fi
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exec ${me}${ver} "$@"
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