1 files changed, 18 insertions, 0 deletions
diff --git a/lib/functions.sh b/lib/functions.sh
new file mode 100644
index 0000000..99a8962
--- /dev/null
+++ b/lib/functions.sh
@@ -0,0 +1,18 @@
+#!/bin/sh
+
+function has()
+{
+    local command_name="${1}"; shift;
+
+    set +o errexit
+    hash "${command_name}" > /dev/null 2>&1;
+    if [ 0 -eq ${?} ];
+    then
+        set -o errexit
+        return 0;
+    fi
+
+    set -o errexit
+    return 1;
+}
+