lib.sh: Add os function which returns current OS.

Works on Debian and Mac OS X at the moment.

diff --git a/lib.sh b/lib.sh
index 5576bce23beab7f48e6cbd989ea6c243cb04a2b5..ea61359e2e806be5b26aaff201930743d7214b5a 100644 (file)
--- a/lib.sh
+++ b/lib.sh
@@ -17,6 +17,19 @@ installed() {
     which $1 | grep -E '^/' > /dev/null
 }
 
+# Prints the current OS. Supported are Debian (debian) and Mac OS X (darwin)
+# at the moment. If an unsupported OS is used an error is printed.
+os() {
+    if [ -f /etc/debian_version ]; then
+        echo debian
+    elif [ x`uname` = xDarwin ]; then
+        echo darwin
+    else
+        echo unsupported OS! >&2
+        return 1
+    fi
+}
+
 # Creates a symbolic link for file $1 in dirname of $2 with name of basenmae
 # $2.
 #