additional argument

bin/rmdepall

 #!/bin/sh
-find . \( -name '*.dep' \) -print | xargs -t rm
+
+if [ $# -eq 0 ]; then
+    find . \( -name '*.dep' \) -print | xargs -t rm
+elif [ $# -eq 1 ]; then
+    echo "Removing all dep files containing $1..."
+    find . -name '*.dep' -exec grep "$1" '{}' \; | sed -e 's/:.*//' | xargs -t rm
+else
+    echo "Usage: `basename $0`        to remove all .dep files"
+    echo "       `basename $0` <file> to remove all .dep files referring to <file>"
+    exit 1
+fi