X-Git-Url: https://ruderich.org/simon/gitweb/?a=blobdiff_plain;f=lib.sh;h=31b56c066db9596df61488efd4e7a48a6c8cbeae;hb=84f932c810dae9ba0dd948e3a90c2f90d1f4e24a;hp=e222da42f00a52c7b391cecd01322b564dad6e0b;hpb=fbc6b0059f5345e8974bd713dc041a4e39e18c73;p=config%2Fdotfiles.git

diff --git a/lib.sh b/lib.sh
index e222da4..31b56c0 100644
--- a/lib.sh
+++ b/lib.sh
@@ -11,6 +11,12 @@ unset LS_COLORS
 m4=`which m4`
 
 
+# Check if the given program is installed. Returns 0 if it exists, 1
+# otherwise; so it can be used in if.
+installed() {
+    which $1 > /dev/null
+}
+
 # Creates a symbolic link for file $1 in dirname of $2 with name of basenmae
 # $2.
 #
@@ -70,4 +76,6 @@ m4() {
     # Process $1.m4 with m4 using the given options.
     echo "m4(): generating '$file' from '$file.m4' with options '$*'"
     $m4 $* $file.m4 >> $file
+
+    unset file
 }