Megatest

	 (archive-info (archive:allocate-new-archive-block *toppath* (common:get-testsuite-name) min-space))
	 (archive-dir  (if archive-info (cdr archive-info) #f))
	 (archive-id   (if archive-info (car archive-info) -1))
	 (disk-groups  (make-hash-table))
	 (test-groups  (make-hash-table)) ;; these two (disk and test groups) could be combined nicely
	 (bup-exe      (or (configf:lookup *configdat* "archive" "bup") "bup"))
	 (compress     (or (configf:lookup *configdat* "archive" "compress") "9"))
	 (linktree     (common:get-linktree))) ;; (configf:lookup *configdat* "setup" "linktree")))

    (if (not archive-dir) ;; no archive disk found, this is fatal
	(begin
	  (debug:print 0 *default-log-port* "FATAL: No archive disks found. Please add disks with at least " min-space " MB space to the [archive-disks] section of megatest.config")
	  (debug:print 0 *default-log-port* "       use [archive] minspace to specify minimum available space")
	  (debug:print 0 *default-log-port* "   disks: " (string-intersperse (map cadr (archive:get-archive-disks)) "\n         "))
	  (exit 1))

     (hash-table-keys disk-groups))
    #t))

(define (archive:bup-restore archive-command run-id run-name tests rp-mutex bup-mutex)  ;; move the getting of archive space down into the below block so that a single run can 
  ;; allocate as needed should a disk fill up
  ;;
  (let* ((bup-exe      (or (configf:lookup *configdat* "archive" "bup") "bup"))
	 (linktree     (common:get-linktree))) ;; (configf:lookup *configdat* "setup" "linktree")))

    ;; from the test info bin the path to the test by stem
    ;;
    (for-each
     (lambda (test-dat)
       ;; When restoring test-dat will initially contain an old and invalid path to the test
       (let* ((best-disk         (get-best-disk *configdat* #f)) ;; BUG: get the testconfig and use it here. Otherwise data pulled out of archive could end up on the wrong kind of disk.

      (debug:print-info 0 *default-log-port* "testpatt defined in "testpatt-key" from runconfigs: " rtestpatt)
      rtestpatt)
     (else args-testpatt))))
     
(define (common:get-linktree)
  (or (getenv "MT_LINKTREE")
      (if *configdat*
	  (configf:lookup *configdat* "setup" "linktree")
	  (if *toppath*
	      (conc *toppath* "/lt")
	      #f))))

(define (common:args-get-runname)
  (let ((res (or (args:get-arg "-runname")
		 (args:get-arg ":runname")
		 (getenv "MT_RUNNAME"))))
    ;; (if res (set-environment-variable "MT_RUNNAME" res)) ;; not sure if this is a good idea. side effect and all ...
    res))

	 (hostname        (get-host-name))
	 (ipaddrstr       (let ((ipstr (if (string=? "-" hostn)
					   ;; (string-intersperse (map number->string (u8vector->list (hostname->ip hostname))) ".")
					   (server:get-best-guess-address hostname)
					   #f)))
			    (if ipstr ipstr hostn))) ;; hostname))) 
	 (start-port      (portlogger:open-run-close portlogger:find-port))
	 (link-tree-path  (common:get-linktree))) ;; (configf:lookup *configdat* "setup" "linktree")))
    (debug:print-info 0 *default-log-port* "portlogger recommended port: " start-port)
    (root-path     (if link-tree-path 
		       link-tree-path
		       (current-directory))) ;; WARNING: SECURITY HOLE. FIX ASAP!
    (handle-directory spiffy-directory-listing)
    (handle-exception (lambda (exn chain)
			(signal (make-composite-condition

	      (list  "MT_TEST_RUN_DIR" work-area)
	      (list  "MT_TEST_NAME" test-name)
	      (list  "MT_ITEM_INFO" (conc itemdat))
	      (list  "MT_ITEMPATH"  item-path)
	      (list  "MT_RUNNAME"   runname)
	      (list  "MT_MEGATEST"  megatest)
	      (list  "MT_TARGET"    target)
	      (list  "MT_LINKTREE"  (common:get-linktree)) ;; (configf:lookup *configdat* "setup" "linktree"))
	      (list  "MT_TESTSUITENAME" (common:get-testsuite-name))))

	  (if mt-bindir-path (setenv "PATH" (conc (getenv "PATH") ":" mt-bindir-path)))
	  ;; (change-directory top-path)
	  ;; Can setup as client for server mode now
	  ;; (client:setup)

(define (launch:cache-config)
  ;; if we have a linktree and -runtests and -target and the directory exists dump the config
  ;; to megatest-(current-seconds).cfg and symlink it to megatest.cfg
  (if (and *configdat* 
	   (or (args:get-arg "-run")
	       (args:get-arg "-runtests")
	       (args:get-arg "-execute")))
      (let* ((linktree (common:get-linktree)) ;; (get-environment-variable "MT_LINKTREE"))
	     (target   (common:args-get-target exit-if-bad: #t))
	     (runname  (or (args:get-arg "-runname")
			   (args:get-arg ":runname")
			   (getenv "MT_RUNNAME")))
	     (fulldir  (conc linktree "/"
			     target "/"
			     runname)))

		    (debug:print-error 0 *default-log-port* "you are not in a megatest area!")
		    (exit 1)))
	      (setenv "MT_RUN_AREA_HOME" *toppath*)
	      ;; the seed read is done, now read runconfigs, cache it then read megatest.config one more time and cache it
	      (let* ((keys         (rmt:get-keys))
		     (key-vals     (keys:target->keyval keys target))
		     (linktree     (or (getenv "MT_LINKTREE")
				       (if *configdat*
					   (configf:lookup *configdat* "setup" "linktree")
					   (conc *toppath* "/lt"))))
		     (second-pass  (find-and-read-config
				    mtconfig
				    environ-patt: "env-override"
				    given-toppath: toppath
				    pathenvvar: "MT_RUN_AREA_HOME"))
		     (runconfigdat (begin     ;; this read of the runconfigs will see any adjustments made by re-reading megatest.config
				     (for-each (lambda (kt)

	      (set! *runconfigdat* rdat)
	      (set! *toppath*      toppath)
	      (set! *configstatus* 'partial))
	    (begin
	      (debug:print-error 0 *default-log-port* "No " mtconfig " file found. Giving up.")
	      (exit 2))))))
    ;; additional house keeping
    (let* ((linktree (common:get-linktree)))

      (if linktree
	  (begin
	    (if (not (file-exists? linktree))
		(begin
		  (handle-exceptions
		   exn
		   (begin

	 (test-base    (conc testtop-base (if not-iterated "" "/") item-path))

	 ;; nb// if itempath is not "" then it is prefixed with "/"
	 (toptest-path (conc disk-path (if contour (conc "/" contour) "") "/" testtop-base))
	 (test-path    (conc disk-path (if contour (conc "/" contour) "") "/" test-base))

	 ;; ensure this exists first as links to subtests must be created there
	 (linktree  (common:get-linktree))
	 ;; WAS: (let ((rd (config-lookup *configdat* "setup" "linktree")))
	 ;;         (if rd rd (conc *toppath* "/runs"))))
	 ;; which seems wrong ...

	 (lnkbase   (conc linktree (if contour (conc "/" contour) "") "/" target "/" runname))
	 (lnkpath   (conc lnkbase "/" testname))
	 (lnkpathf  (conc lnkpath (if not-iterated "" "/") item-path))
	 (lnktarget (conc lnkpath "/" item-path)))

    ;; Update the rundir path in the test record for all, rundir=physical, shortdir=logical

;;
(if (args:get-arg "-clean-cache")
    (begin
      (set! *didsomething* #t) ;; suppress the help output.
      (if (getenv "MT_TARGET") ;; no point in trying if no target
	  (if (args:get-arg "-runname")
	      (let* ((toppath  (launch:setup))
		     (linktree (common:get-linktree)) ;; (if toppath (configf:lookup *configdat* "setup" "linktree")))
		     (runtop   (conc linktree "/" (getenv "MT_TARGET") "/" (args:get-arg "-runname")))
		     (files    (if (file-exists? runtop)
				   (append (glob (conc runtop "/.megatest*"))
					   (glob (conc runtop "/.runconfig*")))
				   '())))
		(if (null? files)
		    (debug:print-info 0 *default-log-port* "No cached megatest or runconfigs files found. None removed.")

	(let ((test-dirs (tests:get-tests-search-path *configdat*)))
	  (let loop ((hed (car test-dirs))
		     (tal (cdr test-dirs)))
	    ;; Setting MT_LINKTREE here is almost certainly unnecessary. 
	    (let ((tconfig-file (conc hed "/" test-name "/testconfig")))
	      (if (and (file-exists? tconfig-file)
		       (file-read-access? tconfig-file))
		  (let ((link-tree-path (common:get-linktree)) ;; (configf:lookup *configdat* "setup" "linktree"))
			(old-link-tree  (get-environment-variable "MT_LINKTREE")))
		    (if link-tree-path (setenv "MT_LINKTREE" link-tree-path))
		    (let ((newtcfg (read-config tconfig-file #f #f))) ;; NOTE: Does NOT run [system ...]
		      (hash-table-set! *testconfigs* test-name newtcfg)
		      (if old-link-tree 
			  (setenv "MT_LINKTREE" old-link-tree)
			  (unsetenv "MT_LINKTREE"))

(define (runs:set-megatest-env-vars run-id #!key (inkeys #f)(inrunname #f)(inkeyvals #f)(intarget #f)(testname #f)(itempath #f))
  (let* ((target    (or intarget 
			(common:args-get-target)
			(get-environment-variable "MT_TARGET")))
	 (keys      (if inkeys    inkeys    (rmt:get-keys)))
	 (keyvals   (if inkeyvals inkeyvals (keys:target->keyval keys target)))
	 (vals      (hash-table-ref/default *env-vars-by-run-id* run-id #f))
	 (link-tree (common:get-linktree))) ;; (configf:lookup *configdat* "setup" "linktree")))
    (if testname (setenv "MT_TEST_NAME" testname))
    (if itempath (setenv "MT_ITEMPATH"  itempath))

    ;; get the info from the db and put it in the cache
    (if link-tree
	(setenv "MT_LINKTREE" link-tree)
	(debug:print-error 0 *default-log-port* "linktree not set, should be set in megatest.config in [setup] section."))

		       (if remove (system (conc "rm -rf " fullpath)))
		       #f)))
	       #t))))))

(define (tasks:get-task-db-path)
  (let ((dbdir  (or (configf:lookup *configdat* "setup" "monitordir")
		    (configf:lookup *configdat* "setup" "dbdir")
		    (conc (common:get-linktree) "/.db"))))
    (handle-exceptions
     exn
     (begin
       (debug:print-error 0 *default-log-port* "Couldn't create path to " dbdir)
       (exit 1))
     (if (not (directory? dbdir))(create-directory dbdir #t)))
    dbdir))