initial commit

bash/bob/bob.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+# V1: initial version
+# V2: cosmetic changes
+
+shopt -s extglob
+
+# set to mask to enable logs. 0: none, 255: all
+#(( debug=2#00001111 ))
+# $1: log level (mask), then strings to display.
+debug () {
+    (( debug & $1 )) && shift && echo "${@}" >&2
+}
+
+arg="$1"
+
+# trim all blank characters safely
+arg="${arg//[[:space:]]/}"
+debug 1 trim "$arg"
+
+# and check if last char is question mark
+[[ ${arg: -1} == "?" ]] && question=+
+
+# the tricky part in test is that non alpha characters are considered
+# differently in tests, depending on the rest of the string (having
+# letters or not). So we remove them in that case.
+[[ "$arg" == *[[:alpha:]]* ]] && arg="${arg//[![:alpha:]]/}"
+debug 1 special "$arg" $question
+
+# and now proceed with rules
+case "$arg$question" in
+    "")
+        echo "Fine. Be that way!"
+        ;;
+    +([[:upper:]])+)
+        echo "Calm down, I know what I'm doing!"
+        ;;
+    *+)
+        echo "Sure."
+        ;;
+    +([[:upper:]]))
+        echo "Whoa, chill out!"
+        ;;
+    *)
+        echo "Whatever."
+        ;;
+esac
+exit 0
+
+# emacs/vim settings.
+# Local Variables:
+# sh-basic-offset: 4
+# indent-tabs-mode: nil
+# comment-column: 50
+# fill-column: 80
+# End:
+# vim: set tabstop=4 expandtab: