Megatest

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;; Copyright 2006-2012, Matthew Welland.
;; 
;;  This program is made available under the GNU GPL version 2.0 or
;;  greater. See the accompanying file COPYING for details.
;; 
;;  This program is distributed WITHOUT ANY WARRANTY; without even the
;;  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR

;; 
;;  <linkdir> - <target> - <testname> [ - <itempath> ]
;; 
;; All log file links should be stored relative to the top of link path
;;  
;; <target> - <testname> [ - <itempath> ] 
;;
(define (create-work-area db run-id test-src-path disk-path testname itemdat)
  (let* ((run-info (db:get-run-info db run-id))
	 (item-path (item-list->path itemdat))
	 (runname  (db:get-value-by-header (db:get-row run-info)
					   (db:get-header run-info)
					   "runname"))
	 ;; convert back to db: from rdb: - this is always run at server end
	 (key-vals (db:get-key-vals db run-id))
	 (target   (string-intersperse key-vals "/"))
	 ;; nb// if itempath is not "" then it is prefixed with "/"
	 (toptest-path (conc disk-path "/" target "/" runname "/" testname))
	 (test-path    (conc toptest-path (if (equal? item-path "") "" "/") item-path))
	 ;; ensure this exists first as links to subtests must be created there

	 (linktree  (let ((rd (config-lookup *configdat* "setup" "linktree")))
		     (if rd rd (conc *toppath* "/runs"))))
	 (lnkbase  (conc linktree "/" target "/" runname))
	 (lnkpath  (conc lnkbase "/" testname))) ;; item-path)))
    (debug:print 2 "INFO:\n       lnkbase=" lnkbase "\n       lnkpath=" lnkpath "\n  toptest-path=" toptest-path "\n     test-path=" test-path)
    (if (not (file-exists? linktree))
	(begin
	  (debug:print 0 "WARNING: linktree did not exist! Creating it now at " linktree)
	  (create-directory linktree #t))) ;; (system (conc "mkdir -p " linktree))))
    ;; create the directory for the tests dir links, this is needed no matter what...
    (if (not (directory-exists? lnkbase))
	(create-directory lnkbase #t))
    

    ;; update the toptest record with its location rundir, cache the path
    ;; This wass highly inefficient, one db write for every subtest, potentially
    ;; thousands of unnecessary updates, cache the fact it was set and don't set it 
    ;; again. 
    (if (not (hash-table-ref/default *toptest-paths* testname #f))
	(let* ((testinfo       (db:get-test-info db run-id testname item-path))
	       (curr-test-path (if testinfo (db:test-get-rundir testinfo) #f)))
	  (hash-table-set! *toptest-paths* testname curr-test-path)
	  (if (or (not curr-test-path)
		  (not (directory-exists? toptest-path)))
	      (begin
		(debug:print 2 "INFO: Creating " toptest-path " and link " lnkpath)
		(create-directory toptest-path #t)
		(db:test-set-rundir! db run-id testname "" lnkpath) ;; toptest-path)
		(hash-table-set! *toptest-paths* testname toptest-path)))))

    ;; Now create the link from the test path to the link tree, however
    ;; if the test is iterated it is necessary to create the parent path
    ;; to the iteration. use pathname-directory to trim the path by one
    ;; level
    (if (not (equal? item-path "")) ;; i.e. iterated
	(let ((iterated-parent  (pathname-directory (conc lnkpath "/" item-path))))
	  (debug:print 2 "INFO: Creating iterated parent " iterated-parent)
	  (create-directory iterated-parent #t)))
    (if (not (file-exists? lnkpath))
	(create-symbolic-link toptest-path lnkpath))
    
    ;; The toptest path has been created, the link to the test in the linktree has
    ;; been created. Now, if this is an iterated test the real test dir must be created
    (if (not (equal? item-path "")) ;; this is an iterated test
	(let ((lnktarget (conc lnkpath "/" item-path)))
	  (debug:print 2 "Setting up sub test run area")
	  (debug:print 2 " - creating run area in " test-path)
	  (create-directory test-path #t) ;; (system  (conc "mkdir -p " test-path))
	  (debug:print 2 " - creating link from " test-path " to " lnktarget)
	  ;; (create-directory lnkpath #t) ;; (system  (conc "mkdir -p " lnkpath))
	  
	  (create-symbolic-link test-path lnktarget)))

    ;; I suspect this section was deleting test directories under some 
    ;; wierd sitations? This doesn't make sense - reenabling the rm -f 
    ;; I honestly don't remember *why* this chunk was needed...
    ;; (let ((testlink (conc lnkpath "/" testname)))
    ;;   (if (and (file-exists? testlink)
    ;;            (or (regular-file? testlink)
    ;;     	   (symbolic-link? testlink)))
    ;;       (system (conc "rm -f " testlink)))
    ;;   (system  (conc "ln -sf " test-path " " testlink)))
    (if (directory? test-path)
	(begin
	  (let* ((cmd    (conc "rsync -av" (if (> *verbosity* 1) "" "q") " " test-src-path "/ " test-path "/"))
		 (status (system cmd)))
	    (if (not (eq? status 0))
		(debug:print 2 "ERROR: problem with running \"" cmd "\"")))
	  (list test-path toptest-path))
	(list #f #f))))

;; 1. look though disks list for disk with most space
;; 2. create run dir on disk, path name is meaningful
;; 3. create link from run dir to megatest runs area 
;; 4. remotely run the test on allocated host
;;    - could be ssh to host from hosts table (update regularly with load)