urbit/pkg/arvo/app/aqua.hoon

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:: An aquarium of virtual ships. Put in some fish and watch them!
::
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:: usage:
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:: |start %aqua
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:: /- aquarium
:: :aqua &pill .^(pill:aquarium %cx %/urbit/pill)
:: OR
:: :aqua &pill +solid
::
:: Then try stuff:
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:: :aqua [%init ~[~bud ~dev]]
:: :aqua [%dojo ~[~bud ~dev] "[our eny (add 3 5)]"]
:: :aqua [%dojo ~[~bud] "|hi ~dev"]
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:: :aqua [%wish ~[~bud ~dev] '(add 2 3)']
:: :aqua [%peek ~[~bud] /cx/~bud/home/(scot %da now)/app/curl/hoon]
:: :aqua [%dojo ~[~bud ~dev] '|mount %']
:: :aqua [%file ~[~bud ~dev] %/sys/vane]
:: :aqua [%pause-events ~[~bud ~dev]]
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::
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::
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:: We get ++unix-event and ++pill from /-aquarium
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::
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/- aquarium
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/+ pill
=, pill-lib=pill
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=, aquarium
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=> $~ |%
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+$ move (pair bone card)
+$ card
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$% [%diff diff-type]
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==
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::
:: Outgoing subscription updates
::
+$ diff-type
$% [%aqua-effects aqua-effects]
[%aqua-events aqua-events]
[%aqua-boths aqua-boths]
==
::
+$ state
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$: %0
pil=pill
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assembled=*
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tym=@da
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fleet-snaps=(map term (map ship pier))
piers=(map ship pier)
==
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::
+$ pier
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$: snap=*
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event-log=(list unix-timed-event)
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next-events=(qeu unix-event)
processing-events=?
==
--
=, gall
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::
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:: unix-{effects,events,boths}: collect jar of effects and events to
:: brodcast all at once to avoid gall backpressure
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:: moves: Hoist moves into state for cleaner state management
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::
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=| unix-effects=(jar ship unix-effect)
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=| unix-events=(jar ship unix-timed-event)
=| unix-boths=(jar ship unix-both)
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=| moves=(list move)
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|_ $: hid=bowl
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state
==
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::
:: Represents a single ship's state.
::
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++ pe
|= who=ship
=+ (~(gut by piers) who *pier)
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=* pier-data -
|%
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::
:: Done; install data
::
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++ abet-pe
^+ this
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=. piers (~(put by piers) who pier-data)
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this
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::
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:: Initialize new ship
::
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++ apex
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=. pier-data *pier
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=. snap assembled
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~& pill-size=(met 3 (jam snap))
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..abet-pe
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::
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:: Enqueue events to child arvo
::
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++ push-events
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|= ues=(list unix-event)
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^+ ..abet-pe
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=. next-events (~(gas to next-events) ues)
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..abet-pe
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::
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:: Send moves to host arvo
::
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++ emit-moves
|= ms=(list move)
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=. this (^emit-moves ms)
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..abet-pe
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::
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:: Process the events in our queue.
::
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++ plow
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|- ^+ ..abet-pe
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?: =(~ next-events)
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..abet-pe
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?. processing-events
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..abet-pe
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=^ ue next-events ~(get to next-events)
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=/ poke-arm (mox +47.snap)
?> ?=(%0 -.poke-arm)
=/ poke p.poke-arm
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=. tym (max +(tym) now.hid)
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=/ poke-result (mule |.((slum poke tym ue)))
?: ?=(%| -.poke-result)
%- (slog >%aqua-crash< >guest=who< p.poke-result)
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$
=. snap +.p.poke-result
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=. ..abet-pe (publish-event tym ue)
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=. ..abet-pe (handle-effects ((list ovum) -.p.poke-result))
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$
::
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:: Peek
::
++ peek
|= p=*
=/ res (mox +46.snap)
?> ?=(%0 -.res)
=/ peek p.res
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=/ pax (path p)
?> ?=([@ @ @ @ *] pax)
=. i.t.t.t.pax (scot %da tym)
=/ pek (slum peek [tym pax])
pek
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::
:: Wish
::
++ wish
|= txt=@t
=/ res (mox +22.snap)
?> ?=(%0 -.res)
=/ wish p.res
~& [who=who %wished (slum wish txt)]
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..abet-pe
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::
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++ mox |=(* (mock [snap +<] scry))
::
:: Start/stop processing events. When stopped, events are added to
:: our queue but not processed.
::
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++ start-processing-events .(processing-events &)
++ stop-processing-events .(processing-events |)
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::
:: Handle all the effects produced by a single event.
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::
++ handle-effects
|= effects=(list ovum)
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^+ ..abet-pe
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?~ effects
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..abet-pe
=. ..abet-pe
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=/ sof ((soft unix-effect) i.effects)
?~ sof
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~? aqua-debug=& [who=who %unknown-effect i.effects]
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..abet-pe
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(publish-effect u.sof)
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$(effects t.effects)
::
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:: Give effect to our subscribers
::
++ publish-effect
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|= uf=unix-effect
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^+ ..abet-pe
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=. unix-effects (~(add ja unix-effects) who uf)
=. unix-boths (~(add ja unix-boths) who [%effect uf])
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..abet-pe
::
:: Give event to our subscribers
::
++ publish-event
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|= ute=unix-timed-event
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^+ ..abet-pe
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=. event-log [ute event-log]
=. unix-events (~(add ja unix-events) who ute)
=. unix-boths (~(add ja unix-boths) who [%event ute])
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..abet-pe
--
::
++ this .
::
:: ++apex-aqua and ++abet-aqua must bookend calls from gall
::
++ apex-aqua
^+ this
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=: moves ~
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unix-effects ~
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unix-events ~
unix-boths ~
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==
this
::
++ abet-aqua
^- (quip move _this)
=. this
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%- emit-moves
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%- zing ^- (list (list move))
%+ turn ~(tap by sup.hid)
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|= [b=bone her=ship pax=path]
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^- (list move)
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?+ pax ~
[%effects @ ~]
=/ who (slav %p i.t.pax)
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=/ ufs (~(get ja unix-effects) who)
?~ ufs
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~
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[b %diff %aqua-effects who (flop ufs)]~
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::
[%effects ~]
%+ turn
~(tap by unix-effects)
|= [who=ship ufs=(list unix-effect)]
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[b %diff %aqua-effects who (flop ufs)]
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::
[%events @ ~]
=/ who (slav %p i.t.pax)
=/ ve (~(get ja unix-events) who)
?~ ve
~
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[b %diff %aqua-events who (flop ve)]~
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::
[%boths @ ~]
=/ who (slav %p i.t.pax)
=/ bo (~(get ja unix-boths) who)
?~ bo
~
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[b %diff %aqua-boths who (flop bo)]~
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==
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[(flop moves) this]
::
++ emit-moves
|= ms=(list move)
=. moves (weld ms moves)
this
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::
::
:: Run all events on all ships until all queues are empty
::
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++ plow-all
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|- ^+ this
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=/ who
=/ pers ~(tap by piers)
|- ^- (unit ship)
?~ pers
~
?: &(?=(^ next-events.q.i.pers) processing-events.q.i.pers)
`p.i.pers
$(pers t.pers)
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~? aqua-debug=| plowing=who
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?~ who
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this
=. this abet-pe:plow:(pe u.who)
$
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::
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:: Subscribe to effects from a ship
::
++ peer-effects
|= pax=path
^- (quip move _this)
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?. ?=([@ *] pax)
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~& [%aqua-bad-peer-effects pax]
`this
?~ (slaw %p i.pax)
~& [%aqua-bad-peer-effects-ship pax]
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!!
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`this
::
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:: Subscribe to events to a ship
::
++ peer-events
|= pax=path
^- (quip move _this)
?. ?=([@ ~] pax)
~& [%aqua-bad-peer-events pax]
`this
?~ (slaw %p i.pax)
~& [%aqua-bad-peer-events-ship pax]
!!
`this
::
:: Subscribe to both events and effects of a ship
::
++ peer-boths
|= pax=path
^- (quip move _this)
?. ?=([@ ~] pax)
~& [%aqua-bad-peer-boths pax]
`this
?~ (slaw %p i.pax)
~& [%aqua-bad-peer-boths-ship pax]
!!
`this
::
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:: Load a pill and assemble arvo. Doesn't send any of the initial
:: events.
::
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++ poke-pill
|= p=pill
^- (quip move _this)
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=. this apex-aqua =< abet-aqua
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=. pil p
~& lent=(met 3 (jam boot-ova.pil))
=/ res=toon :: (each * (list tank))
(mock [boot-ova.pil [2 [0 3] [0 2]]] scry)
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=. fleet-snaps ~
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?- -.res
%0
~& %suc
=. assembled +7.p.res
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this
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::
%1
~& [%vere-blocked p.res]
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this
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::
%2
~& %vere-fail
%- (slog p.res)
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this
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==
::
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:: Handle commands from CLI
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::
:: Should put some thought into arg structure, maybe make a mark.
::
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:: Should convert some of these to just rewrite into ++poke-events.
::
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++ poke-noun
|= val=*
^- (quip move _this)
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=. this apex-aqua =< abet-aqua
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^+ this
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:: Could potentially factor out the three lines of turn-ships
:: boilerplate
::
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?+ val ~|(%bad-noun-arg !!)
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[%swap-vanes vs=*]
?> ?=([[%7 * %1 installed=*] ~] boot-ova.pil)
=. installed.boot-ova.pil
%+ roll (,(list term) vs.val)
|= [v=term _installed.boot-ova.pil]
%^ slum installed.boot-ova.pil now.hid
=/ vane
?+ v ~|([%unknown-vane v] !!)
%a %ames
%b %behn
%c %clay
%d %dill
%e %eyre
%f %ford
%g %gall
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%j %jael
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==
=/ pax
/(scot %p our.hid)/home/(scot %da now.hid)/sys/vane/[vane]
=/ txt .^(@ %cx (weld pax /hoon))
[/vane/[vane] [%veer v pax txt]]
=> .(this ^+(this this))
=^ ms this (poke-pill pil)
(emit-moves ms)
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::
[%swap-files ~]
=. userspace-ova.pil
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=/ slim-dirs
`(list path)`~[/app /gen /lib /mar /sur /hoon/sys /arvo/sys /zuse/sys]
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:_ ~
%- unix-event
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%- %*(. file-ovum:pill-lib directories slim-dirs)
/(scot %p our.hid)/home/(scot %da now.hid)
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=^ ms this (poke-pill pil)
(emit-moves ms)
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::
[%wish hers=* p=@t]
%+ turn-ships ((list ship) hers.val)
|= [who=ship thus=_this]
=. this thus
(wish:(pe who) p.val)
::
[%unpause-events hers=*]
%+ turn-ships ((list ship) hers.val)
|= [who=ship thus=_this]
=. this thus
start-processing-events:(pe who)
::
[%pause-events hers=*]
%+ turn-ships ((list ship) hers.val)
|= [who=ship thus=_this]
=. this thus
stop-processing-events:(pe who)
::
[%clear-snap lab=@tas]
=. fleet-snaps ~ :: (~(del by fleet-snaps) lab.val)
this
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==
::
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:: Apply a list of events tagged by ship
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::
++ poke-aqua-events
|= events=(list aqua-event)
^- (quip move _this)
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=. this apex-aqua =< abet-aqua
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%+ turn-events events
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|= [ae=aqua-event thus=_this]
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=. this thus
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?- -.ae
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%init-ship
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=. this abet-pe:(publish-effect:(pe who.ae) [/ %sleep ~])
=/ initted
=< plow
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%- push-events:apex:(pe who.ae)
^- (list unix-event)
:~ [/ %wack 0] :: eny
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[/ %whom who.ae] :: eny
[//newt/0v1n.2m9vh %barn ~]
[//behn/0v1n.2m9vh %born ~]
:^ //term/1 %boot &
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?~ keys.ae
[%fake who.ae]
[%dawn u.keys.ae]
-.userspace-ova.pil
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[//http-client/0v1n.2m9vh %born ~]
[//http-server/0v1n.2m9vh %born ~]
[//http-server/0v1n.2m9vh %live 8.080 `8.445]
==
=. this abet-pe:initted
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(pe who.ae)
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::
%pause-events
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stop-processing-events:(pe who.ae)
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::
%snap-ships
=. fleet-snaps
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%+ ~(put by fleet-snaps) lab.ae
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%- malt
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%+ murn hers.ae
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|= her=ship
^- (unit (pair ship pier))
=+ per=(~(get by piers) her)
?~ per
~
`[her u.per]
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(pe -.hers.ae)
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::
%restore-snap
=. this
%+ turn-ships (turn ~(tap by piers) head)
|= [who=ship thus=_this]
=. this thus
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(publish-effect:(pe who) [/ %sleep ~])
=. piers (~(uni by piers) (~(got by fleet-snaps) lab.ae))
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=. this
%+ turn-ships (turn ~(tap by piers) head)
|= [who=ship thus=_this]
=. this thus
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(publish-effect:(pe who) [/ %restore ~])
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(pe ~bud) :: XX why ~bud? need an example
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::
%event
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~? &(aqua-debug=| !?=(?(%belt %hear) -.q.ue.ae))
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raw-event=[who.ae -.q.ue.ae]
~? &(debug=| ?=(%receive -.q.ue.ae))
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raw-event=[who.ae ue.ae]
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(push-events:(pe who.ae) [ue.ae]~)
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==
::
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:: Run a callback function against a list of ships, aggregating state
:: and plowing all ships at the end.
::
:: I think we should use patterns like this more often. Because we
:: don't, here's some points to be aware.
::
:: `fun` must take `this` as a parameter, since it needs to be
:: downstream of previous state changes. You could use `state` as
:: the state variable, but it muddles the code and it's not clear
:: whether it's better. You could use the `_(pe)` core if you're
:: sure you'll never need to refer to anything outside of your pier,
:: but I don't think we can guarantee that.
::
:: The callback function must start with `=. this thus`, or else
:: you don't get the new state. Would be great if you could hot-swap
:: that context in here, but we don't know where to put it unless we
:: restrict the callbacks to always have `this` at a particular axis,
:: and that doesn't feel right
::
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++ turn-plow
|* arg=mold
|= [hers=(list arg) fun=$-([arg _this] _(pe))]
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|- ^+ this
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?~ hers
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plow-all
=. this
abet-pe:plow:(fun i.hers this)
$(hers t.hers, this this)
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::
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++ turn-ships (turn-plow ship)
++ turn-events (turn-plow aqua-event)
::
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:: Check whether we have a snapshot
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::
++ peek-x-fleet-snap
|= pax=path
^- (unit (unit [%noun noun]))
?. ?=([@ ~] pax)
~
:^ ~ ~ %noun
(~(has by fleet-snaps) i.pax)
::
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:: Pass scry into child ship
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::
++ peek-x-i
|= pax=path
^- (unit (unit [%noun noun]))
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?. ?=([@ @ @ @ @ *] pax)
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~
=/ who (slav %p i.pax)
=/ pier (~(get by piers) who)
?~ pier
~
:^ ~ ~ %noun
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(peek:(pe who) t.pax)
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::
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:: Get all created ships
::
++ peek-x-ships
|= pax=path
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^- (unit (unit [%noun (list ship)]))
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?. ?=(~ pax)
~
:^ ~ ~ %noun
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`(list ship)`(turn ~(tap by piers) head)
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::
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::
::
++ peek-x-pill
|= pax=path
^- (unit (unit [%pill pill]))
=/ pill-size (met 3 (jam pil))
?: (lth pill-size 100)
~& [%no-pill size=pill-size]
[~ ~]
``pill+pil
::
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:: Trivial scry for mock
::
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++ scry |=([* *] ~)
::
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:: Throw away old state if it doesn't soft to new state.
::
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++ prep
|= old/(unit noun)
^- [(list move) _+>.$]
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~& prep=%aqua
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?~ old
`+>.$
=+ new=((soft state) u.old)
?~ new
`+>.$
`+>.$(+<+ u.new)
--