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#!/usr/bin/env bash
# Copyright (c) 2016 Egor Tensin <Egor.Tensin@gmail.com>
# This file is part of the "Cygwin configuration files" project.
# For details, see https://github.com/egor-tensin/cygwin-home.
# Distributed under the MIT License.
source "$HOME/.bash_utils/text.sh"
add_missing_path() (
set -o errexit -o nounset -o pipefail
[ "$#" -eq 0 ] && return 0
local -a new_list
local path
while IFS= read -d '' -r path; do
new_list+=("$path")
done < <( readlink -z --canonicalize-missing -- "$@" )
for path; do
if str_contains "$path" ':'; then
echo "${FUNCNAME[0]}: mustn't contain colon (':') characters: $path" >&2
return 1
fi
done
local -A old_dict
local -a old_list
if [ -n "${PATH-}" ]; then
while IFS= read -d '' -r path; do
old_dict[$path]=1
old_list+=("$path")
done < <( str_split -z -- "${PATH-}" ':' | xargs -0 -- readlink -z --canonicalize-missing -- )
fi
for path in ${new_list[@]+"${new_list[@]}"}; do
[ -n "${old_dict[$path]+x}" ] && continue
old_dict[$path]=1
old_list+=("$path")
done
str_join ':' ${old_list[@]+"${old_list[@]}"}
)
add_path() {
local new_path
new_path="$( add_missing_path "$@" )" \
&& export PATH="$new_path"
}
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