Megatest

(define (runs:run-tests-queue db run-id runname test-records keyvallst flags)
    ;; At this point the list of parent tests is expanded 
    ;; NB// Should expand items here and then insert into the run queue.
  (debug:print 5 "test-records: " test-records ", keyvallst: " keyvallst " flags: " (hash-table->alist flags))
  (let ((sorted-test-names (tests:sort-by-priority-and-waiton test-records))
	(item-patts        (hash-table-ref/default flags "-itempatt" #f)))
    (if (not (null? sorted-test-names))

	(let loop ((hed         (car sorted-test-names))
		   (tal         (cdr sorted-test-names)))
	  (let* ((test-record (hash-table-ref test-records hed))
		 (tconfig     (tests:testqueue-get-testconfig test-record))
		 (waitons     (tests:testqueue-get-waitons    test-record))
		 (priority    (tests:testqueue-get-priority   test-record))
		 (itemdat     (tests:testqueue-get-itemdat    test-record)) ;; itemdat can be a string, list or #f
		 (items       (tests:testqueue-get-items      test-record))
		 (item-path   (item-list->path itemdat))
		 (newtal      (append tal (list hed)))
		 (calc-fails  (lambda (prereqs-not-met)
				(filter (lambda (test)
					  (debug:print 9 "test: " test)
					  (and (vector? test) ;; not (string? test))
					       (not (member (db:test-get-status test)
							    '("PASS" "WARN" "CHECK" "WAIVED")))))
					prereqs-not-met))))
	    (debug:print 6
			 "itemdat:     " itemdat
			 "\n  items:     " items
			 "\n  item-path: " item-path)
	    (cond
	     ((not items) ;; when false the test is ok to be handed off to launch (but not before)
	      (let* ((have-resources  (runs:can-run-more-tests db test-record)) ;; look at the test jobgroup and tot jobs running
		     (prereqs-not-met (db:get-prereqs-not-met db run-id waitons item-path))
		     (fails           (calc-fails prereqs-not-met)))
		(debug:print 8 "INFO: have-resources: " have-resources " prereqs-not-met: " prereqs-not-met " fails: " fails)
		;; Don't know at this time if the test have been launched at some time in the past
		;; i.e. is this a re-launch?
		(cond
		 ((and have-resources
		       (null? prereqs-not-met))
		  ;; no loop here, just drop though and use the loop at the bottom 
		  (if (patt-list-match item-path item-patts)
		      (run:test db run-id runname keyvallst test-record flags #f)
		      (debug:print 1 "INFO: Skipping " (tests:testqueue-get-testname test-record) " " item-path " as it doesn't match " item-patts))
		  ;; else the run is stuck, temporarily or permanently
		  ;; but should check if it is due to lack of resources vs. prerequisites
		  )
		 ((not have-resources) ;; simply try again after waiting a second
		  (thread-sleep! 1.0)
		  (debug:print 1 "INFO: no resources to run new tests, waiting ...")
		  ;; could have done hed tal here but doing car/cdr of newtal to rotate tests
		  (loop (car newtal)(cdr newtal)))
		 (else ;; must be we have unmet prerequisites
		    (debug:print 4 "FAILS: " fails)
		    ;; If one or more of the prereqs-not-met are FAIL then we can issue
		    ;; a message and drop hed from the items to be processed.
		    (if (null? fails)
			(begin
			  ;; couldn't run, take a breather
			  (debug:print 4 "INFO: Shouldn't really get here, race condition? Unable to launch more tests at this moment, killing time ...")
			  (thread-sleep! 0.1) ;; long sleep here - no resources, may as well be patient
			  ;; we made new tal by sticking hed at the back of the list
			  (loop (car newtal)(cdr newtal)))
			;; the waiton is FAIL so no point in trying to run hed ever again
			(if (not (null? tal))
			    (begin
			      (debug:print 1 "WARN: Dropping test " (db:test-get-test-name hed) "/" (db:test-get-item-path hed)
					   " from the launch list as it has prerequistes that are FAIL")
			      (loop (car tal)(cdr tal)))))))))
	     
	     ;; case where an items came in as a list been processed
	     ((and (list? items)     ;; thus we know our items are already calculated
		   (not   itemdat)) ;; and not yet expanded into the list of things to be done
	      (if (and (>= *verbosity* 1)
		       (> (length items) 0)
		       (> (length (car items)) 0))

	       items)
	      (if (not (null? tal))
		  (loop (car tal)(cdr tal))))

	     ;; if items is a proc then need to run items:get-items-from-config, get the list and loop 
	     ;;    - but only do that if resources exist to kick off the job
	     ((or (procedure? items)(eq? items 'have-procedure))
	      (let* ((can-run-more    (runs:can-run-more-tests db test-record))
		     (prereqs-not-met (db:get-prereqs-not-met db run-id waitons item-path))
		     (fails           (calc-fails prereqs-not-met)))
		(debug:print 8 "INFO: can-run-more: " can-run-more
			     " prereqs-not-met:\n  " (intersperse prereqs-not-met "\n")
			     " fails:\n "            (intersperse fails "\n"))
		(cond 
		 ((and can-run-more (null? prereqs-not-met))
		  (let ((test-name (tests:testqueue-get-testname test-record)))
		    (setenv "MT_TEST_NAME" test-name) ;; 
		    (setenv "MT_RUNNAME"   runname)
		    (set-megatest-env-vars db run-id) ;; these may be needed by the launching process
		    (let ((items-list (items:get-items-from-config tconfig)))
		      (if (list? items-list)
			  (begin
			    (tests:testqueue-set-items! test-record items-list)
			    (loop hed tal))
			  (begin
			    (debug:print 0 "ERROR: The proc from reading the setup did not yield a list - please report this")
			    (exit 1))))))
		 ((and can-run-more (null? fails))
		  (debug:print 4 "INFO: Can't run more right now, killing a little time ...")
		  (thread-sleep! 3.0)
		  (loop (car newtal)(cdr newtal))) ;; an issue with prereqs not yet met?
		 (else
		  (debug:print 1 "INFO: test "  hed " has failed prerequisite(s); "
			       (string-intersperse (map db:test-get-testname fails) ", ")
			       ", removing it from to-do list")
		  (if (not (null? tal))
		      (loop (car tal)(cdr tal)))))))
	     
	     ;; this case should not happen, added to help catch any bugs
	     ((and (list? items) itemdat)
	      (debug:print 0 "ERROR: Should not have a list of items in a test and the itemspath set - please report this")
	      (exit 1))))
	  
	  ;; we get here on "drop through" - loop for next test in queue
	  (if (null? tal)

		'NOT_STARTED
		(if testdat
		    (string->symbol (test:get-state testdat))
		    'failed-to-insert))
	((failed-to-insert)
	 (debug:print 0 "ERROR: Failed to insert the record into the db"))
	((NOT_STARTED COMPLETED)

	 (let ((runflag #f))
	   (cond
	    ;; -force, run no matter what
	    (force (set! runflag #t))
	    ;; NOT_STARTED, run no matter what
	    ((equal? (test:get-state testdat) "NOT_STARTED")(set! runflag #t))
	    ;; not -rerun and PASS, WARN or CHECK, do no run
	    ((and (or (not rerun)
		      keepgoing)
		  ;; Require to force re-run for COMPLETED or *anything* + PASS,WARN or CHECK
		  (or (member (test:get-status testdat) '("PASS" "WARN" "CHECK"))
		      (member (test:get-state  testdat) '("COMPLETED")))) 
	     (debug:print 2 "INFO: running test " test-name "/" item-path " suppressed as it is " (test:get-state testdat) " and " (test:get-status testdat))
	     (set! runflag #f))
	    ;; -rerun and status is one of the specifed, run it
	    ((and rerun
		  (let* ((rerunlst   (string-split rerun ","))
			 (must-rerun (member (test:get-status testdat) rerunlst)))
		    (debug:print 3 "INFO: -rerun list: " rerun ", test-status: " (test:get-status testdat)", must-rerun: " must-rerun)
		    must-rerun))