syndicate-lang
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syndicate-rkt
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Make reloaders in turn reloadable

This commit is contained in:
Tony Garnock-Jones 2019-01-30 16:40:12 +00:00
parent 8b516b0190
commit 28d7bd6653
1 changed files with 19 additions and 8 deletions
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27
syndicate/reload.rkt
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@ -36,14 +36,18 @@
(stop-when (asserted (reload-pending '#,(path->string (syntax-source stx))))
body ...))]))
(define-syntax-rule (spawn-reloader module-path)
(spawn-reloader* 'module-path))
(define-syntax (spawn-reloader stx)
(syntax-case stx ()
[(_ module-path)
(quasisyntax/loc stx
(spawn-reloader* 'module-path '#,(path->string (syntax-source stx))))]))
(define (spawn-reloader* module-path)
(define (spawn-reloader* module-path loading-module-pathstr)
(match (module-path->path-string module-path)
[#f #f]
[pathstr
(supervise #:name (reloader pathstr)
(stop-when (asserted (reload-pending loading-module-pathstr)))
(reloader-mixin** module-path pathstr))
#t]))
@ -74,9 +78,10 @@
(define (reload!)
(when (not (reloading?))
(reloading? #t)
(react (field [obstacles-cleared? #f])
(react (field [obstacles-cleared? #f] [obstacles-existed? #f])
(define/query-value obstacles-exist? #f (observe (reload-pending pathstr)) #t
#:on-add (log-syndicate/reload-info "waiting to reload ~v" pathstr)
#:on-add (begin (log-syndicate/reload-info "waiting to reload ~v" pathstr)
(obstacles-existed? #t))
#:on-remove (obstacles-cleared? #t))
(assert #:when (obstacles-exist?) (reload-pending pathstr))
(on-start (flush!)
@ -85,11 +90,17 @@
(flush!) ;; Wait one turn for effects of newly-cleared obstacles
(log-syndicate/reload-info "(re)loading ~v" pathstr)
(dynamic-rerequire module-path)
(spawn* #:name module-path
((dynamic-require `(submod ,module-path syndicate-main)
'activate!)))
(let ((force-reactivation? (obstacles-existed?)))
(when force-reactivation?
(log-syndicate/reload-info "forcing reactivation of ~v" pathstr))
(spawn* #:name module-path
((dynamic-require `(submod ,module-path syndicate-main)
(if force-reactivation? 'activate!* 'activate!)))))
(reloading? #f)))))
(on-start (log-syndicate/reload-debug "reloader ~v starting" pathstr))
(on-stop (log-syndicate/reload-debug "reloader ~v stopping" pathstr))
(field [previous-version 'unknown])
(define/query-value latest-version 'unknown (file-content pathstr file->sha1 $p) p)
(begin/dataflow