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Who Moved My Cheese? Ember's New Filesystem Layout

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call yet thanks everyone for being here today and excited to be back at mbar on giving a talk and hopefully talk about something that you decided to learn a little bit about today what's going on I'm where talk about monetary unification our embers new file system layouts as a problem most likely people haven't been paying wanted into the tension would think of it before we do that I just want to take a look at those survey
really quickly really just 1 thing here on my company to and trade has been doing survey for about 4 years now at Thom unidimensional keynote and they said go check the results you should go check the results if you go to images dot com there's a like a button that sends you a link to it I'm kind of a cool thing is that the survey last year we started collecting free text results so we actually have like lots of data and and essays that some people wrote and I short quits other people wrote I and II it's actually pretty core actually read all that stuff you do is flipping through last night so like the IoT you're speaking truth to power as it were so when you know what I had to spend the survey so I think you did participate in the survey how many people participate in this event pretty good also so I yeah thank you for that and thank you to our our internal Concha who's here with us are important at my co-workers Isaac and Corey for putting in a lot of work to make this happen this year in Thom Hellman who work with us last year on the survey and a bunch of text and also supports this year which you can see in the on this particular chart is the upgrade Kercher which I was really like because it shows that but the but should move forward with number they're able to upgrade to new versions we have a really good story around that so that the peak in there is like out the red line is to . 18 and work goes down a little bit is 3 . that have like just been released when we did the surveys so what this prize that was in higher than 2 that 18 I wasn't disappointed either so OK I'm yet but I am happy to announce that recount here that I had completed my
own a preprocessed symmetry comma decimal 0 by removing all my deprecated features use zeqiri process but but but this is India tough problem was pretty good that this
is another photo of me 5 so this is a photo in 2016 so I had just moved to California I am in love with my wonderful girlfriend who I'm going to marry and I'm thinking you know what could make this life any better how do a little bit of source me just find a little project to work and others are a
see that danger part had been like slaving over in the mines for a while our C 143 which describe module unification and I was like yeah
it's like a really detailed so it must be well stacked and I can just like you know rental decoding will be will be finished with this thing and as you can probably guess since the year 2018 I didn't really work out
that way but we need a lot of progress I in 2016 we merge that see eye to eye 17 we had a basic implementation over the summer camp we did demo of modification apps including in running at that were from classic mode atoms and the last thing that we've been calling the golden spike was ability for modeling unification at to invoke emotion unification add-on components and that's kind of like the recount we've crossed the last few weeks and that really sets us up to the focused more on concrete tasks that can anyone can participate in in order to get this to a point where kinship so chemical thing about this is that has not been a fast process but has many uniquely ember process there is no major corporate backer there is no like overlords the sky bring money down upon this project this is truly people a community taking you know it they're to at the company or time on their own to contribute to this effort to make it move forward instilled in me that I which is I think pretty amazing unique so that kind of went over 3 things are the 1st thing to talk about here is how Amber does upgrades because I think when we talk about how a change the file system of our applications every once to panic you don't need to it's going to be OK Rec itself blankets can be fun Our talk will be about the future of modifications design and what we get out of it and we're also going to talk about cost where it is in kind of really concrete terms Zuse back and relax and I'll show you how to try some stuff on your own at the end of talk so the
1st tool that member has that we use to get can move from a cat and we want to get rid of light you could say we wanna get rid of the classic Apple there we wanna move toward something new how do we make that happen before the 1st tool is really defecations I deprecation is high in Anbar have a couple of action a lot of rules and the 1 you like the 1 that days it seemed like deprecation we just like for fast when you're after there wasn't really a plan I'm the tutor phase we really have stabilize from a set of best practices that we have quantifications they kind of tell us how we can make changes to the framework that what he's we can make changes the framework others too big things to remember
about defecations in 1 is that there will not be defecation until there is a replacement so I think class example this is our animal components in controllers by everyone's like when you're going to defecate controllers that use controllers they will not be deprecated until we have a thing that you can use instead so you should be able to use them with aplomb and feel good about it I am the 2nd thing is that even if you use bird you consume little bit slower pace not keeping up with every single released by everything will be deprecating at least 1 LTS so even if you're the most conservative of organizations you're still getting all the same warnings that you would if you're keeping up with everything every every 6 weeks so don't feel like you're missing out so if we wanted to take some API that we want to get rid of it we have a major release coming up and were like great the former planet major release on the 1st thing need to do of course is have a new API to replace it so we need to exceeding cope with something that we're going to do that after the see you discover projects tend to go through a little bit of like a walk in the woods where they might be an add-on they might be a feature flying in amber they might be implemented a couple of different ways and work kind of hunting for what the real implementation of the thing is eventually will have a real implementation in future flying and then we iterate and eventually weekend I'll go that feature and going a feature means a we decide it's going into beta where will sit for 6 weeks then releases and then during the stable release it'll become part of Member proper and in this also tells us then like where we can add the deprecation for projects modification have to be around for at least 1 LTS so that you don't get to really in the LTS clear then LTS release works in Amber is that we have a minor release that release become stable everyone can use it for 6 weeks and a real applications and many people do in after 6 weeks of being used in real applications in stable that thing is declared an LTS so if you truly on the LTS channels when Amber to DOS 16 comes out no used to a 16 right away you wait the 6 weeks and then you adopted as that means we actually need to add our deprecation 6 weeks before the end of last moment have a real us so I'm where modifications process is like so far to begin right so there's no need to panic about like when applications the land is actually still have been monitored a 2nd tool that we use is code mobs and I think we've had a couple different demos of commands and looking at things a code months you come up pretty common 1 that people use was the amber modules code model which took your dumb dumb script files that just use the amber mobile and turned into things that used the by imports and you haven't done this I encourage you to take a look at doing it commands a really easy to use and in the community
has built a whole bunch of them and Brocade gets rid of all those pesky ovember caves and turns them into like methods which is pretty great the amber native DOM helpers will get rid of 1 of the decree usage in year test which is something that you could imagine for that's where there's a lot usage will get rid of all that will not that problem down to like a manageable size we can actually then dropped from the test suite in the last December Montel migrated
in Member model Migrator actually moves between the old links the article I calling it legacy the classic AT-style with the app folder in moves into the source file folders I and we're going to look at this school the more detail later as well I and
then cut the 3rd tool that we have that's very new is optional features on optional features are way that we've always been very has a number about adding flags or toggles we like I wanna turn on this mode because that mode becomes a breaking change it becomes hard to make sure that everyone actually turns on that that that little mode on the plan behind optional features is that of so features by default when the feature is added to it doesn't do anything at all just able to install this this out you can look you can see there's a feature here and by default it acts like it did not before the features in that but then you can enable and disable the of feature in eventually we can tell people Hey the best practice is you want to enable this feature where you want to disable this feature and we can break those things into embassy like that at some later date we can go ahead and applications that say OK we're going to a breaking release we act you want to make these flags the defaults in that next major version of Amber so I know it's deprecated to not have this flag and
the real idea here is that we do this a lot we have a lot of tools at our disposal in really good mostly at removing stuff from the framework so I think we can look at some stuff that we want to add to the framework how we going to ship this new file
system layouts has to go through all these phases so we have to get North Sea you have dictionary implementation we have to get that that go moment where we can put it in beta I and then there's going to be even longer tail after that like deprecation cycle is still commuter processor has to take place where adults need to convert into this new format and applications need to convert to this new format as well it only when all those things happened are we really going to be thinking about when we can deprecate the classic stuff so that's really not going be going away and said but we have some progress basically through to these things were at this like being pivotal moment we can worry about the burned so don't panic in the OK box do experiments trials and the stuff that's going to show you and see what it while looks like an AP report bonds and things like that so we can help move the process forward at a good speed which
go back back to 2016 when we're discussing the original ideas behind like Mondrian's cation what we wanted to do file system on disk and why I wanted to make some of these changes and we're going to really focus on the
design of things for a minute but so where's modification going to actually do for you here on hi people use pods I get a cold so pods was a project that tempted to do something so similar to modern invocation I think positively good at 1 thing is in that in this list which is co-location pods lets you Fig. component of script in your templates in the same folder and that the thing that we want to bring to all Member apps across the board but by changing to this new file system pods didn't do so well at some these other things on because it is really just a rearrangement of the existing practices so was a really good at creating isolation in any way we can have things that were truly going private in were only accessible by 1 2 consumers and where you didn't have namespaces that were shared between the atoms in the application for instance so so the absolute basics for the new file system I'm gonna lie a handful of details like your acting file turns into something called main I think most of you would if you would have seen after you might see those things and go this looks pretty reasonable and I can navigate this I'm but the big thing to know so the higher levels that your source directories can be full of these of groupings and were any use these folders to group related files and related concepts in the system so for example data is actually a directory there has to subgroupings as a grouping for models which is a list of all your models and then each model can have co-located it's model double script adapted and serializes transforms or something that don't relating once this of model so they get their own directory where they can just list out by name but we've got similar things co-located and put in 1 place other there things not part of Member proper that we also want to co-locate in the system such as text so the rule for testament unification is basically as long as you have a dash test you can live anywhere on the file system in America or anywhere in the source directory don't really care how we'll find it will roll it up into the rescue tests we will execute it and and so that leaves us our room to both do things like Lynch if we don't want you to protest in certain places but also I think gives app developers want freedom to come up with conventions that work for them as to where they want to keep the test files inside the could bases another thing that's commonly going to be co-located is styles and I we have some improvement that much unification gives us here styles themselves kind of like tests they're almost layer on top of mud unification there's no firm rules about how to name them or anything like that are exactly where you have to put them the thing that changes compared to other versions of member the app director in particular is that when the source directories process by embassy light both the styles in the templates in your job script are all available at the same time to any other so if you wanted to make it out on that would say my using any styles inside the template that's in the same directory Why do I have classes that are not being used in this template from like that that's very difficult to do in imbecile like today with the Apple there it would be pretty trivial to do with the source tractor that's a pretty well less improvement I'm this is basically just a list of the
big a map of all the collections that we have so we have models which is a grouping and transforms the the hell of 1 is in it so the initializes get thrown into in a folder because you know having both those things the top will silly very rarely accessed services go on the top I and then there's a UI folder that contains 2 things were really split-up how you organize your application the routs folder which is such as it sounds kind of similar to what the that 1 cause I guess we upon for the looks like in the components folder which is very similar to just a composed will remembered today I and we also of course partials but we have put at the bottom of every list until people forget about them by there headed 2 variants of here of how I renaming a file that you might have noticed and I might have thought a little bit confusing so sometimes a file is named with its name yes sometimes a file is named with its name slash right Tarjan yes I and what are the rules for this system out so actually maybe a little bit more elegant then you might think it's certainly not clear yet how but they see the idea is that if a file is only its name not js we should have named exports lose named exports are the exact same thing as a default export from the type of jails version of the name was this allows us become opens the door stressed explore things like single-file components where you can just have exports for 3 different things in dress of in some kind itself but a low-level modifications kind of ready for that kind of system where we can pack these things up on in and combined with I where you
can do that like where you have that name that you can just use and you have to something called the default type that's available in public places I in practice this is basically just feels correct and in the generators when you use of modification to the correct thing for you so you don't need to think too much about where to put these files in practice but it's going to look at how they were named in what some of rules are
and this is all the goal of giving us collocations collocation and it's similar to like you if you're building a kitchen something just on all your tools next you wanna know that your test is near your job scripting your styles right next year template and things like that and that's really the goal of this part of work under
the thing that we have co-located again another way that modification helps us to put things together I we have actively here on the left hand side and on the right hand side we have in which 1 is the sum sorry we have our 2 components which are being called into the 2 components are in a directory called components in then we're looking at the root Template on the left-hand side here I and if this is the only place where these complaints use then we might not want to have them on the top level where all the other templates have to worry about that name like what if I want to create several gadget lists flexible different versions different templates I might want to isolate this in so we have a feature that we call local look up that's built on top of a mountain unification and ends by local up provides a way for any components but for helper administered to be invoked only if his nested beneath the invoking template so in this case we have the gadget template of HPS which is like the bottom file on the right hand side you're able to access those components only from that 1 file because the nested in the directory lawyer a we can had to bring the components directory with us when we did this before we had a new I components another in this like rout stash components folders we had to pull out along with us in order to be able to access the by but what if template here wasn't actually about what if a template was a component total look like then in this case I'm left hand side we have the newer component template letter rout template anymore and on the right-hand side you can see it we know they have that dashed components folder anymore because were already in the components folder we don't need to bring along with us to basically keep whatever we call them collection you're in if you're in the components collection that's inherited for all the subdirectories if you're in the RATS Collection same thing and you you want to go to components you have to swap that with that Dash components and other I in sometimes yeah private components so this is kind of nice because now a gadget listing get show a completely private get display nothing else in your application can invoke those 2 components they can be accessed in you imagine 1st small helpers this is also kind of nice because you get different variants of helper with a really short name you don't need to have some fun until but sometimes you actually want to have those users' private API for that component we want to be yield them out and of course he knew contextual component to do that as well you can have list and show you disclose over the local thing from local look up and you'll that out now you have a completely private interface Engadget List Engadget Show but you're able to expose some of it to other consumers say your writing on something like that or just an obstruction your application
so this is a big improvement for the isolation application code it's not just co-location at this point we actually have a better spot to put things in more discreet places to look at stuff in case
you're thinking yeah I don't have any components only only use once but I win back encountered some apps that we've run through the conversion script for much unification and it looks like it's almost half and both of them that were single-use components or helpers and and we were at the module Migrator tool that we use automatically remaps all those things to be these local lookups if you're only using 1 spot and so were able to see that life is actually think that real world absolute used because we can see it in existing apps today such but let's take a look at 1 other form of isolation that modification gives us which is by isolation for adults so on the left here we have a classic application template when talk about a classic at talking about in-app with an app directory does not have a search directory just as in director and the right we have a classic out which means it has an add-on directory in app directory and I the classic Atle looks pretty ridiculous it has 3 different gadget list files to like create 1 component that exposing of public API which has pretty ludicrous and has get a show gets the same treatment but we all know how this works the app directories basically merged with your application so if your application for example had a thing called gadget list the the to in conflict in 1 would win over the other if you had another atom that also define a single gadget list all 3 would be in conflict and 1 would win does anyone know which 1 wins maybe Robert knows which 1 wins I don't know which 1 so does it seem idea so what we've created in bond unification atoms on the left you have a modification app with the source directory on the right we have a modern unification add-on on that also has a source directory is the idea that namespaces for adults so on the left we use the adenine gadget dashed tools and and call and call and denotes that now I want to talk about component or helper that's inside of bad namespace and I basically reach into the source directory that exist for that of atom so the side you can see the adult self base just looks like a application in that looks the same as when running application and I think that's a lot more approachable for our developers as they write their 1st components and should be of the 1st Adleman should be pretty nice there is some but nice like benefits that can from this as well so it seems like having to write all those dashes is a bummer because we to have a phone call in which is a very specific hints that is you do like tells you that this thing is invokable 1 is not going to be a property path or anything else so we can drop the dash requirement and we can just named things with single words as long as they're going to always be consumed with that Cohen colon namespace style of and there is an additional feature called main so if you just invoke aid something like gadget tools 1st modification will look the same to have a local look up and so you don't have a local look up little look to say OK check the components directed top level to everything in the top level in so you don't have anything the top level will actually then look to say do I have an add-on to have a name space with that name if I do does it have a name if it does use that but what they should enable if you also closed over there you guys you can imagine you have something like amber power select review the say ever pass like as in any would yield out its own API as potential opponents or as of like named blocks the some the other and if yeah that we have floating around do those abstractions and templates so
now we haven't heard isolation of apps believe got some isolation for add-ons as well and this seems like a good when I'm might
be wondering what would be what does migration study look like how do we actually because I talked about these things all operating at different paces we're going to have this wild west for a while where some ad on the upgrade in some apps are created and how they all mentioned and get along on the left this is a classic at so it has an app for the on the right it's a modification out also so as a source for the and what we basically do is take the components directory there we re-exported through app for you so we make this modification add-on acted like it's a classic mode at all if your application is not a much mitigation application that gives us a path where an add-on author could migrate their entire out on to use the new style but your application can be a lengthy classic that still have the ability to invoke all the stuff of that at all often does need to abandon you as they do the upgrade cycle it also the opposite on the left here we have a module unification up so as a search directory and on the right we have an eye and a classic out on so it has an add-on in an app directory the way we deal with this is we have a thing called the fallback resolver which basically uses the Mont unification rules to do look up and then it said this I didn't find anything let me run all the old rules as well like the rules that we use for applications today and that means that it'll find the things that add-ons are currently republishing into the App Directory so we have liquor of migration charge it works in both directions like it said will you really get at
this as so some of the some
challenges round and kinescopes with the namespace little that we receive you just take the name of the package and they do cold call and that sounds so nice I but in reality and can has now added scopes and schools are not a thing that can still thing amber seems to be super well aligned with yet and wanted to be well aligned with them because we think and and skills will be popular I think you have not use them before an N can scope would say act in school came slash kind of like at slash and you can add in having a template where you have an angle bracket acts in the power switch slash by select calling Coleman select close angle is like mind blowing so we would like to cope with I know that we have a pretty good solution for that on before it totally tied this so Borisy that is currently floating around OK so let's go back to
2018 and wrap this up and see with
exactly look like today so embers Fosters' let what can we do today in 2018 and we can generate new applications we can generate new add-ons both using large invitation and we can even take existing classic application in script on that migrate since the new into the new world have to
create a new style application you need be running embassy like area so feature flies in amber Seelye a little bit different than a number in you go into that conflict environments file and you can opt into a future finds a all 1 turns on as long as you have installed after defined in every data are such that just all enabled all the time if you install the Canary version of embassy light so of unification work is buying a future flight Soneji's use it you must install Kaneria embassy that's the only possible way to get so you need to make sure that implements all globally the master and you can use this modification environment variable call and renew my up and get it running
and if we take a quick look at what that looks I think it basically what this point of and so it is generating new app and you can see that it's got like a template thus far out here and it's calling welcome page turner that fallback resolver that's a fallback resolvable complained hasn't been updated here's using like the classic mold welcome page so I went ahead and created a new our components that when used for local look upon what at this title in like you know I say how a lot so I don't wanna have to cite how do you know over again minimaker component that's going to have this little bit of you I behind southern welcome as an appointment so we've got some templates and I can go ahead and move my content for that tag into the templates that I can invoke that in the top level is going to find this because it's 5 in this case not local look up just into components directors I just made a top little component but see later on we go and we have a little bit more content to something will come in or something welcome is getting longer but no we really want that title fight have its own little bit of you i on that could go ahead and make another component in this case because I modem uses titans 1 place mimic the local lookup component so I'm already at the components collection so I just need to use slash In the name the things in this case welcome title as the point right now I can go back to and I can't go into my son and welcome can point template and I can invoke book entitled and cover that snippet and thrown over into the template and load up so modifications working in like relapse that you can go ahead and try and stir experiment with the stuff therefore you can do is generate clear and the other thing you can do is generate a in out on this this the and come back picked up in like like shoved across the finish line this week so thank you I and I get and their works the same way you can take your out on a CRAY-2 source directory installant a modification apparantly with those namespaces if you wanna be on Twitter at that stuff and see looks like another thing that I think many of us cost member of we have existing apps and we want to make sure that you read so there's an ember model Migrator i in the steps here are actually pretty short the trickiest there is definitely calling amber in it because just like any upgrade you have to be met Diffie process where there's a couple things that are going on there's a quest issue the link to at the end of this like and we don't want to that i'm specifically says what things to look for when you do that in a process in case you're afraid that you might like this 1 of them during the transition so this is also very doable migration was there any of this will like working you should ship at the product that's simply not the goal Our goal here is that we're in that like find all the bugs and actually address them on the future find it the ship because we think we have the the correct approach
I did want to see what a real Apple looks like and are both running and you have to look at the source code of the simplest thing to do is to go here so bottom this link to get out of that happens in Mondrian cation very like quick way for you to get to actually see some stuff so I encourage you to do
that and I'd so getting to go here I we had a modification strike teams since November 5 that has gotten like these we've got was really focused on back on track with mean every week so thank you to Devin and Kristen Isaac and Preston Robert and Dana Neely and the girl because without them we would not have like all this stuff kind of tied together we would not have finished exploration in B at this like new implementation stuff so
quest begins as we have a new Final Cut issue in the exploration phase of this work is really done in were in like the bulk fixed phase like this is like shovel-ready stuff if you want to get into making contributions and out I'd like to learn and learn a little bit of the depth the system and I think that's it thank you this
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Metadaten

Formale Metadaten

Titel Who Moved My Cheese? Ember's New Filesystem Layout
Serientitel EmberConf 2018
Autor Beale, Matthew
Lizenz CC-Namensnennung - Weitergabe unter gleichen Bedingungen 3.0 Unported:
Sie dürfen das Werk bzw. den Inhalt zu jedem legalen und nicht-kommerziellen Zweck nutzen, verändern und in unveränderter oder veränderter Form vervielfältigen, verbreiten und öffentlich zugänglich machen, sofern Sie den Namen des Autors/Rechteinhabers in der von ihm festgelegten Weise nennen und das Werk bzw. diesen Inhalt auch in veränderter Form nur unter den Bedingungen dieser Lizenz weitergeben.
DOI 10.5446/35704
Herausgeber Confreaks, LLC
Erscheinungsjahr 2018
Sprache Englisch
Produzent Confreaks, LLC
Produktionsjahr 2018

Inhaltliche Metadaten

Fachgebiet Informatik
Abstract Ember's new filesystem layout, commonly called Module Unification, has arrived. Applications and addons alike have started to adopt the new convention. Why should you be looking at Module Unification? With the new layout we're bringing code bundling, improved namespacing for components, and a better integration path for addons to the framework.

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