From e5b926055b733227c97d0fcc9444a4b20a16d1a7 Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Thu, 27 Oct 2016 06:20:40 +0300
Subject: add path.sh

---
 %HOME%/.bash_utils/path.sh | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 %HOME%/.bash_utils/path.sh

(limited to '%HOME%/.bash_utils')

diff --git a/%HOME%/.bash_utils/path.sh b/%HOME%/.bash_utils/path.sh
new file mode 100644
index 0000000..322e802
--- /dev/null
+++ b/%HOME%/.bash_utils/path.sh
@@ -0,0 +1,45 @@
+#!/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 "$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )/text.sh"
+
+add_missing_path() (
+    set -o errexit -o nounset -o pipefail
+
+    [ "$#" -eq 0 ] && return 0
+
+    local -a new_paths
+    local path
+
+    while IFS= read -d '' -r path; do
+        new_paths+=("$path")
+    done < <( readlink --zero --canonicalize-missing "$@" )
+
+    for path; do
+        if str_contains "$path" ':'; then
+            echo "${FUNCNAME[0]}: mustn't contain colons: $path" >&2
+            return 1
+        fi
+    done
+
+    local -A old_paths
+
+    while IFS= read -d '' -r path; do
+        old_paths[$path]=1
+    done < <( str_split -z -- "${PATH-}" ':' | xargs --null readlink --zero --canonicalize-missing )
+
+    for path in ${new_paths[@]+"${new_paths[@]}"}; do
+        old_paths[$path]=1
+    done
+
+    str_join ':' "${!old_paths[@]}"
+)
+
+add_path() {
+    PATH="$( add_missing_path "$@" )" || return $?
+    export PATH
+}
-- 
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