Megatest

	(prefix sqlite3 sqlite3:)
	data-structures
	extras
	files
	matchable
	md5
	message-digest
	pathname-expand
	posix
	posix-extras
	regex
	regex-case
	srfi-1
	srfi-18
	srfi-69
	typed-records

      #f ;; I don't really care why this failed (at least for now)
    (delete-file* fname)))

;;======================================================================
;; misc conversion, data manipulation functions
;;======================================================================

;;======================================================================
;; return first command that exists, else #f
;;
(define (common:which cmds)
  (if (null? cmds)
      #f
      (let loop ((hed (car cmds))
		 (tal (cdr cmds)))
	(let ((res (with-input-from-pipe (conc "which " hed) read-line)))
	  (if (and (string? res)
		   (file-exists? res))
	      res
	      (if (null? tal)
		  #f
		  (loop (car tal)(cdr tal))))))))
  
(define (common:get-megatest-exe)
  (let* ((mtexe (or (get-environment-variable "MT_MEGATEST")
		    (common:which '("megatest"))
		    "megatest")))
    (if (file-exists? mtexe)
	(realpath mtexe)
	mtexe)))

(define (common:get-megatest-exe-dir)
  (let* ((mtexe (common:get-megatest-exe)))
    (pathname-directory mtexe)))

;; more generic and comprehensive version of get-megatest-exe
;;
(define (common:get-mtexe)
  (let* ((mtpathdir  (common:get-megatest-exe-dir)))
    (or (common:get-megatest-exe)
	(if mtpathdir
	    (conc mtpathdir"/megatest")
	    #f)
	"megatest")))

(define (common:get-megatest-exe-path)
  (let* ((mtpathdir (common:get-megatest-exe-dir)))
    (conc mtpathdir":"(get-environment-variable "PATH") ":.")))

(define (realpath x) (resolve-pathname  (pathname-expand (or x "/dev/null")) ))

;; if it looks like a number -> convert it to a number, else return it
;;
(define (lazy-convert inval)
  (let* ((as-num (if (string? inval)(string->number inval) #f)))
    (or as-num inval)))

;; to '((a . 1)(b . 2)(c . "a silly thing")(d . ""))