From: Simon Ruderich <simon@ruderich.org>
Date: Sun, 7 Mar 2010 21:03:53 +0000 (+0100)
Subject: lib.sh: Add support for less capable sh/test.
X-Git-Url: https://ruderich.org/simon/gitweb/?p=config%2Fdotfiles.git;a=commitdiff_plain;h=28014a7a3978f84082fb7e979357e3ff56435887;hp=c619e7cce2a60f2d435a783ba607ea7b421170b7

lib.sh: Add support for less capable sh/test.
---

diff --git a/lib.sh b/lib.sh
index e1be32d..d9b14c5 100644
--- a/lib.sh
+++ b/lib.sh
@@ -43,7 +43,8 @@ os() {
 link() {
     # Get all necessary paths.
     pwd=`pwd`
-    base=`dirname "$2"`
+    base=`echo "$2" | sed "s|\~|$HOME|"` # expand ~, some sh don't do it
+    base=`dirname "$base"`
     source=`echo "$pwd/$1" | sed "s|$base/||"`
     target=`basename "$2"`
 
@@ -52,13 +53,14 @@ link() {
 
     # Abort if the target file exists and is no symbolic link. Prevents
     # overwriting real files.
-    if [ -e "$target" -a ! -h "$target" ]; then
+    if [ \( -f "$target" -a ! -h "$target" \) -o \
+         \( -s "$target" -a ! -h "$target" \) ]; then
         echo "link(): target '$target' exists already and is no symbolic link!" >&2
         exit 1
     fi
 
-    # Make sure the source exists.
-    if [ ! -e "$source" ]; then
+    # Make sure the source exists (is file, directory or link).
+    if [ ! -f "$source" -a ! -d "$source" -a ! -h "$source" ]; then
         echo "link(): source '$source' doesn't exist!" >&2
         exit 1
     fi