Megatest

	  (common:get-homehost trynum: (- trynum 1)))
	#f))
   (else
    (let* ((currhost (get-host-name))
	   (bestadrs (server:get-best-guess-address currhost))
	   ;; first look in config, then look in file .homehost, create it if not found
	   (homehost (or (configf:lookup *configdat* "server" "homehost" )
			 (handle-exceptions
			     exn
			     (if (> trynum 0)
				 (let ((delay-time (* (- 5 trynum) 5)))
				   (mutex-unlock! *homehost-mutex*)
				   (debug:print 0 *default-log-port* "ERROR: Failed to read .homehost file, delaying " delay-time " seconds and trying again, message: "  ((condition-property-accessor 'exn 'message) exn))
				   (thread-sleep! delay-time)
				   (common:get-homehost trynum: (- trynum 1)))
				 (begin
				   (mutex-unlock! *homehost-mutex*)
				   (debug:print 0 *default-log-port* "ERROR: Failed to read .homehost file after trying five times. Giving up and exiting, message: "  ((condition-property-accessor 'exn 'message) exn))
				   (exit 1)))
			   (let ((hhf (conc *toppath* "/.homehost")))
			     (if (file-exists? hhf)
				 (with-input-from-file hhf read-line)
				 (if (file-write-access? *toppath*)
				     (begin
				       (with-output-to-file hhf
					 (lambda ()
					   (print bestadrs)))
				       (begin
					 (mutex-unlock! *homehost-mutex*)
					 (car (common:get-homehost))))
				     #f))))))
	   (at-home  (or (equal? homehost currhost)
			 (equal? homehost bestadrs))))
      (set! *home-host* (cons homehost at-home))
      (mutex-unlock! *homehost-mutex*)
      *home-host*))))

;; am I on the homehost?

;;======================================================================
;; launch a task - this runs on the originating host, tests themselves
;;
;;======================================================================

(use regex regex-case base64 sqlite3 srfi-18 directory-utils posix-extras z3 call-with-environment-variables csv)
(use typed-records pathname-expand matchable)

(import (prefix base64 base64:))
(import (prefix sqlite3 sqlite3:))

(declare (unit launch))
(declare (uses common))
(declare (uses configf))

	(let* ((testpath  (assoc/default 'testpath  cmdinfo))  ;; testpath is the test spec area
	       (top-path  (assoc/default 'toppath   cmdinfo))
	       (work-area (assoc/default 'work-area cmdinfo))  ;; work-area is the test run area
	       (test-name (assoc/default 'test-name cmdinfo))
	       (runscript (assoc/default 'runscript cmdinfo))
	       (ezsteps   (assoc/default 'ezsteps   cmdinfo))
	       ;; (runremote (assoc/default 'runremote cmdinfo))
	       ;; (transport (assoc/default 'transport cmdinfo))  ;; not used
	       ;; (serverinf (assoc/default 'serverinf cmdinfo))
	       ;; (port      (assoc/default 'port      cmdinfo))
	       (serverurl (assoc/default 'serverurl cmdinfo))
	       (homehost  (assoc/default 'homehost  cmdinfo))
	       (run-id    (assoc/default 'run-id    cmdinfo))
	       (test-id   (assoc/default 'test-id   cmdinfo))
	       (target    (assoc/default 'target    cmdinfo))
	       (itemdat   (assoc/default 'itemdat   cmdinfo))
	       (env-ovrd  (assoc/default 'env-ovrd  cmdinfo))
	       (set-vars  (assoc/default 'set-vars  cmdinfo)) ;; pre-overrides from -setvar
	       (runname   (assoc/default 'runname   cmdinfo))

                                                   (file-execute-access? fulln))
                                              fulln
                                              runscript))))) ;; assume it is on the path
	       ) ;; (rollup-status 0)

	  (if contour (setenv "MT_CONTOUR" contour))
	  
	  ;; On NFS it can be slow and unreliable to get needed startup information.
	  ;;  i. Check if we are on the homehost, if so, proceed
	  ;; ii. Check if host and port passed in via CMDINFO are valid and if
	  ;;     possible use them.
	  (let ((bestadrs (server:get-best-guess-address (get-host-name)))
		(needcare #f))
	    (if (equal? homehost bestadrs) ;; we are likely on the homehost
		(debug:print-info 0 *default-log-port* "test " test-name " appears to be running on the homehost " homehost)
		(let ((host-port (if serverurl (string-split serverurl ":") #f)))
		  (if (not *runremote*)(set! *runremote* (make-remote))) ;; init *runremote*
		  (if (string? homehost)
		      (if (and host-port
			       (> (length host-port) 1))
			  (let* ((host      (car host-port))
                                 (port      (cadr host-port))
                                 (start-res (http-transport:client-connect host port))
                                 (ping-res  (rmt:login-no-auto-client-setup start-res)))
			    (if (and start-res
				     ping-res)
				(let ((url  (http-transport:server-dat-make-url start-res)))
				  (remote-conndat-set! *runremote* start-res)
				  (remote-server-url-set! *runremote* url)
				  (debug:print-info 0 *default-log-port* "connected to " url " using CMDINFO data."))
				(debug:print-info 0 *default-log-port* "received " host ":" port " for url but could not connect.")
				))
			  (begin
			    (debug:print-info 0 *default-log-port* (if host-port
								       (conc "received invalid host-port information " host-port)
								       "no host-port information received"))
			    ;; potential for bad situation if simultaneous starting of hundreds of jobs on servers, set needcare.
			    (set! needcare #t)))
		      (begin
			(debug:print-info 0 *default-log-port* "received no homehost information. Please report this to support as it should not happen.")
			(set! needcare #t)))))
	    (if needcare  ;; due to very slow NFS we will do a brute force mkdir to ensure that the directory inode it truly available on this host
		(let ((logdir (conc top-path "/logs"))) ;; we'll try to create this directory
		  (handle-exceptions
		      exn
		      (debug:print 0 *default-log-port* "Failed to create directory " logdir " expect problems, message: " ((condition-property-accessor 'exn 'message) exn))
		    (create-directory logdir #t)))))
		  
	  ;; NFS might not have propagated the directory meta data to the run host - give it time if needed
	  (let loop ((count 0))
	    (if (or (file-exists? top-path)
		    (> count 10))
		(change-directory top-path)
		(begin
		  (debug:print 0 *default-log-port* "INFO: Not starting job yet - directory " top-path " not found")

	    (create-directory work-area #t)
	    (debug:print 0 *default-log-port* "WARNING: No disk work area specified - running in the test directory under tmp_run")))
      (set! cmdparms (base64:base64-encode 
		      (z3:encode-buffer 
		       (with-output-to-string
			 (lambda () ;; (list 'hosts     hosts)
			   (write (list (list 'testpath  test-path)
					;; (list 'transport (conc *transport-type*))
					;; (list 'serverinf *server-info*)
					(list 'homehost  (let* ((hhdat (common:get-homehost)))
							   (if hhdat
							       (car hhdat)
							       #f)))
					(list 'serverurl (if *runremote*
							     (remote-server-url *runremote*)
							     #f)) ;; 
					(list 'toppath   *toppath*)
					(list 'work-area work-area)
					(list 'test-name test-name) 
					(list 'runscript runscript) 
					(list 'run-id    run-id   )
					(list 'test-id   test-id  )
					;; (list 'item-path item-path )

;; else return #f to let the calling proc know that there is no server available
;;
(define (rmt:get-connection-info areapath #!key (area-dat #f)) ;; TODO: push areapath down.
  (let* ((runremote (or area-dat *runremote*))
	 (cinfo     (if (remote? runremote)
			(remote-conndat runremote)
			#f)))
	  (if cinfo
	      cinfo
	      (if (server:check-if-running areapath)
		  (client:setup areapath)
		  #f))))

(define *send-receive-mutex* (make-mutex)) ;; should have separate mutex per run-id

;; RA => e.g. usage (rmt:send-receive 'get-var #f (list varname))
;;
(define (rmt:send-receive cmd rid params #!key (attemptnum 1)(area-dat #f)) ;; start attemptnum at 1 so the modulo below works as expected