re-frame-template

A Clojure tools.deps template for quickly creating a re-frame application scaffold (client only). It only takes you 60 seconds to create your first re-frame app and to start editting it.

Provides a way to pick and choose what "extras" are included into your application. Extras like libraries which do routing, debugging and CSS.

This is a translation of the Leiningen based template from day8 to use the seancorfield/clj-new template mechanism for tools.deps style builds. It does not have all the options the original had as I did not know how to use them or translate them to deps.edn style.

The following are not included:

• ~~garden~~
• ~~less~~
• ~~route (secretary)~~
• ~~handler (compojure)~~

Pull Requests welcome!

Will be adding reitit

Basic Usage

The base template includes:

• re-frame
• shadow-cljs
• cljs-devtools

Set up an alias for clj-new

    {:aliases
     {:new {:extra-deps {seancorfield/clj-new
                         {:mvn/version "1.0.199"}}
            :main-opts ["-m" "clj-new.create"]}}
     ...}

Until the template is hosted in clojars, you need to use the version in github. The easiest way is to clone it to your local computer.

To create an application with just the base template, use this commandline:

clj -A:new  <path-to-re-frame-template repo>::re-frame-template <myname/project-name>

where you might, for example, substitute my-github-name/my-killer-app for the <myname/project-name> bit or, perhaps, my-github-name/an-early-masterpiece.

Troubleshooting note: for <project-name> don't use cljs. That name will confuse the compiler (long story) and you will later see errors like cljs.core.init is not a function.

Build a deployable jar of this template:

$ clojure -A:jar

Install it locally:

$ clojure -A:install

Deploy it to Clojars -- needs CLOJARS_USERNAME and CLOJARS_PASSWORD environment variables:

$ clojure -A:deploy

Extras

The optional extras (aka profiles) include:

• Debug
  • re-frame-10x (+10x)
  • re-frisk (+re-frisk)
• Development
  • cider (+cider)
  • clj-kondo (+kondo)
  • cljs.test (+test)
• Misc.
  • re-com (+re-com)
  • re-pressed (+re-pressed)
  • breaking-point (+breaking-point)

To add a profile to the base template, just append its name (let's use +re-com as an example):

clj -A:new  <path-to-re-frame-template repo>::re-frame-template <myname/project-name> +re-com

Any combination of profiles can be added at once:

clj -A:new  <path-to-re-frame-template repo>::re-frame-template <myname/project-name> +re-com +test +10x

Note: to assist debugging, you'll want to include either +10x or +re-frisk

Start Cider from Emacs (if using +cider):

Refer to the shadow-cljs Emacs / CIDER documentation.

The mentioned dir-local.el file is created by this template.

Run application:

Retrieve dependencies (can take a while the first time):

yarn install  # or npm install

Then run:

shadow-cljs -A dev watch app

Wait a bit, perhaps 20 seconds, keeping an eye out for a sign the compile has finished, then browse to http://localhost:8280.

To see other available shadow-cljs commands run:

shadow-cljs --help

Setting Up Your Browser

So, you now have the application running.

Before you start developing, you should tweak two settings within your browser's devtools. These are one-time actions (for each browser and laptop you use). I'll assume Chrome for the purposes of further explanation:

1. Open devtools. Press press F12 or Ctrl-Shift-i (actually there's a variety of ways)
2. Open devtool's "Setting" Panel. Press F1. (Careful. Not the Setting panel for Chrome itself!! The Settings panel for devtools)
3. Under the "Network" heading, tick the option "Disable cache (while DevTools is open)". You don't want shadow-clj's attempts at reloading to be defeated by caching.
4. Under the "Console" heading, tick the option "Enable custom formatters". This allows cljs-devtools to perform its magic.
5. Close Settings. Close Devtools.
6. Reopen Devtools

Open 10x Panel (if using +10x):

To use re-frame-10x for debugging your app:

1. click on the application, minimal through it is, to give it "input focus" (you want to be sure that any key presses are going to your new app)
2. press Ctrl-H and you should see the re-frame-10x panel appear on the right side of the window

Sometimes achieving Step 1 on a really simple app - one without widgets - can be fiddly, because the browser itself hogs "input focus" and grabs all the keystrokes (like Ctrl-H) which don't then make it through to your app. You may need to be determined and creative with Step 1. I have every confidence in you.

Hot Reloading Is Now Go

If you now edit files, like perhaps /src/cljs/<project-name>/views.cljs, shadow-clj will automatically recompile your changes and "hot load" them into your running app, without your app needing to be re-started. The resulting fast, iterative workflow tends to make you very productive, and is cherished by those lucky enough to experience it.

debug?:

In project-name.config, there is a variable called debug?, which defaults to true in the dev build, and false in the prod build.

If, for example, you wrap your printlns with a when block as shown below, then you will get logs printed to the browser's console for the dev build and not the prod build.

(when config/debug?
  (println "dev mode"))

Run tests (if using +test):

Install karma and headless chrome

npm install -g karma-cli

And then run your tests

shadow-cljs -A prod compile karma-test
karma start --single-run --reporters junit,dots

Production Build

To compile clojurescript to javascript:

shadow-cljs -A prod release app

Other Templates

• lein re-frame-templates
• chestnut
• luminus (full stack)
• reagent-figwheel
• reagent-seed

Backend Options

• ring and liberator
• duct
• yada
• pedestal and vase

More re-frame

Looking for more re-frame inspiration, templates or example applications? See the external resources docs page.

Contributing

Contributions are welcomed! To add a new profile, this is what I'd recommend:

1. Add a file with the name of the profile here
2. Look at the existing options in that folder for inspiration for what to include in that file
3. Update project.clj with the profile
4. Add any new files here and use the {{ var-name }} syntax as needed
5. Update the README that will result when the template is used, as well as the top-level README for re-frame-template itself
6. In a terminal, at the root of re-frame-template, run clj -A:install
7. Locally test that your profile works, clj -A:new <path-to-re-frame-template repo>::re-frame-template <myname/project-name> +<profile-name>

License

The MIT License (MIT)

clj-new implementation by: Copyright (c) 2020 Robert Berger

Based on the original lein template version by: day8:

The MIT License (MIT)

Copyright © 2015 Matthew Jaoudi
Copyright © 2015 Dylan Paris
Copyright © 2015 Michael Thompson
Copyright © 2015 Markku Rontu
Copyright © 2016 Daniel Compton
Copyright © 2019 Isaac Johnston

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.