From 7fe0556786e569f981dfb20ba0ac9c74983e7ed0 Mon Sep 17 00:00:00 2001
From: Simon Ruderich <simon@ruderich.org>
Date: Sun, 10 Mar 2013 22:46:29 +0100
Subject: [PATCH] lib.sh: Use `type` instead of `which`.

`type` is more portable. Also remove the old `which` tests.
---
 lib.sh                |  5 ++---
 tests/lib.sh.test     | 50 -------------------------------------------
 tests/lib.sh.test.out |  8 -------
 3 files changed, 2 insertions(+), 61 deletions(-)

diff --git a/lib.sh b/lib.sh
index 95c2fdf..d150778 100644
--- a/lib.sh
+++ b/lib.sh
@@ -23,10 +23,9 @@
 unset LS_COLORS
 
 
-# Check if the given program is installed. Returns 0 if it exists, 1
-# otherwise; so it can be used in if.
+# Check if the given program is installed. `type` is portable, `which` is not.
 installed() {
-    [ x`which $1 2>&1 | cut -c 1` = x/ ] || return 1
+    type "$1" >/dev/null 2>&1
 }
 
 # Print the current OS. The following OS are supported at the moment:
diff --git a/tests/lib.sh.test b/tests/lib.sh.test
index 5db26dc..e46e937 100644
--- a/tests/lib.sh.test
+++ b/tests/lib.sh.test
@@ -18,56 +18,6 @@
 
 . ../lib.sh
 
-# which with proper exit codes and output to stdout.
-which() {
-    if [ $1 = ls ]; then
-        echo /bin/ls
-    else
-        echo no doesnt-exist in /usr/bin /bin /usr/sbin /sbin
-        return 1
-    fi
-}
-echo stdout which
-installed ls && echo ls installed
-installed doesnt-exist && echo doesnt-exist installed
-
-# which with proper exit codes and output to stderr in case of an error.
-which() {
-    if [ $1 = ls ]; then
-        echo /bin/ls
-    else
-        echo no doesnt-exist in /usr/bin /bin /usr/sbin /sbin >&2
-        return 1
-    fi
-}
-echo stderr which
-installed ls && echo ls installed
-installed doesnt-exist && echo doesnt-exist installed
-
-# which with no proper exit codes and output to stdout in case of an error.
-which() {
-    if [ $1 = ls ]; then
-        echo /bin/ls
-    else
-        echo no doesnt-exist in /usr/bin /bin /usr/sbin /sbin
-    fi
-}
-echo stupid which
-installed ls && echo ls installed
-installed doesnt-exist && echo doesnt-exist installed
-
-# which with proper exit codes and no output in case of an error.
-which() {
-    if [ $1 = ls ]; then
-        echo /bin/ls
-    else
-        return 1
-    fi
-}
-echo different which
-installed ls && echo ls installed
-installed doesnt-exist && echo doesnt-exist installed
-
 
 # Tests for generate().
 echo "Simple test file for generate() using m4.
diff --git a/tests/lib.sh.test.out b/tests/lib.sh.test.out
index 17d7b2c..b16d569 100644
--- a/tests/lib.sh.test.out
+++ b/tests/lib.sh.test.out
@@ -1,11 +1,3 @@
-stdout which
-ls installed
-stderr which
-ls installed
-stupid which
-ls installed
-different which
-ls installed
 m4: generating 'tmp/test' from 'tmp/test.m4' with options '-DTEST=m4'
 ###################################
 # WARNING! DO NOT EDIT THIS FILE! #
-- 
2.43.2