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#!/bin/bash
# All the prefixes to consider
prefixes=(
"$HOME"
"$HOME/.local.`uname -m`"
"$HOME/.local"
"$HOME/.prefix.`uname -m`"
"$HOME/.prefix"
"$HOME"/.gem/ruby/*
)
######################################################################
in_array() {
local needle=$1; shift
local haystack=("$@")
local straw
for straw in "${haystack[@]}"; do
[[ "$needle" == "$straw" ]] && return 0
done
return 1
}
# Import existing values
IFS=: paths=($PATH)
IFS=: rubylibs=($RUBYLIB)
# Scan through prefixes
for prefix in "${prefixes[@]}"; do
# PATH
dir="$prefix/bin"
if [[ -d "$dir" ]] && ! in_array "$dir" "${paths[@]}"; then
paths=("$dir" "${paths[@]}")
fi
# RUBYLIB
dir="$prefix/lib"
if [[ -d "$dir" ]] && ! in_array "$dir" "${rubylibs[@]}"; then
rubylibs=("$dir" "${rubylibs[@]}")
fi
done
# Finally, print our values
IFS=: PATH="${paths[*]}"
IFS=: RUBYLIB="${rubylibs[*]}"
# The sed bit here is the only time we call an external program
{
declare -p PATH
declare -p RUBYLIB
} | sed 's/^declare \(-\S* \)*//'
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