Add YAML quick validator

dotfiles/bash/main.bashrc

@@ -83,6 +83,14 @@ twice() {
     "$@"
 }
 
+ckyaml() {
+    #
+    # Check if YAML file $1 is loadable
+    #
+    local yfile=$1
+    python -c 'import yaml; import sys; print(yaml.load(sys.stdin)["this"])' <"$yfile"
+}
+
 git() {
     #
     # /usr/bin/git wrapper just to disable dangerous commands