Fl4m3Ph03n1x

Fl4m3Ph03n1x

Fresh new 1.7 Phoenix app inside umbrella fails build

Background

I have a fresh umbrella app and I am trying to create a Phoenix app inside it. However, even though I can create the Phoenix app inside the umbrella, I cannot build it successfully.

Problem

I am creating a phoenix app inside a fresh umbrella project like this:

  1. mix new test_app --umbrella
  2. cd apps
  3. mix phx.new web_interface --no-dashboard --no-ecto --no-gettext --no-mailer --live

These commands run fine. However when I try to setup the app, something breaks:

  1. cd web_interface
  2. mix setup returns:

08:14:50.318 [warning] tailwind version is not configured. Please set it in your config files:

config :tailwind, :version, “3.2.4”

Browserslist: caniuse-lite is outdated. Please run:
npx update-browserslist-db@latest
Why you should do it regularly: GitHub - browserslist/update-db: CLI tool to update caniuse-lite to refresh target browsers from Browserslist config

Rebuilding…

To me, this is odd. Everything is fresh new, so I was really not expecting any warning. But it gets worse. Once rebuilding is done, I get an actual error:

Done in 200ms.

08:14:52.146 [warning] esbuild version is not configured. Please set it in your config files:

config :esbuild, :version, "0.16.4"

** (RuntimeError) no arguments passed to esbuild
(esbuild 0.7.0) lib/esbuild.ex:170: Esbuild.run/2
(esbuild 0.7.0) lib/mix/tasks/esbuild.ex:49: Mix.Tasks.Esbuild.install_and_run/1
(mix 1.14.1) lib/mix/task.ex:421: anonymous fn/3 in Mix.Task.run_task/4
(mix 1.14.1) lib/mix/task.ex:479: Mix.Task.run_alias/6
(mix 1.14.1) lib/mix/cli.ex:84: Mix.CLI.run_task/2

At first I thought this was happening because I had something outdated in my machine. So I did some updates:

  1. mix local.hex
  2. mix archive.install hex phx_new

However, this did not fix the issue.

I am running on Windows.

Questions

  1. It is my understanding that if I create a new app inside an umbrella project, elixir is smart enough to detect that and I don’t need to do anything new/different. Is this the case?
  2. IIRC the --live flag became a default in Phoenix 1.6. Is this still case for 1.7? (Meaning all apps are live now, by default?)
  3. Why am I getting this error? How can I fix it?

Marked As Solved

Fl4m3Ph03n1x

Fl4m3Ph03n1x

Answer

The issue here was that I was using an incorrect command when creating the Phoenix app. I was using mix phx.new instead of mix phx.new.web.

To me, this is rather confusing, as from the documentation/tutorials (https://elixir-lang.org/getting-started/mix-otp/dependencies-and-umbrella-projects.html#umbrella-projects) we have this quote:

(…) First of all, since we generated this project inside kv_umbrella/apps, Mix automatically detected the umbrella structure (…)

Which states that when creating an app inside an umbrella project, Mix does have the capacity to detect it and act accordingly.

This does not hold true for Phoenix apps. For reasons beyond my understanding, Phoenix apps do not know their context and thus the user needs to tell mix that the new app will be inside an umbrella project.

This is confusing to me. Sometimes mix is smart enough to know, other times, it isn’t. I don’t know which times it knows and which times it doesn’t.

So, to conclude, given the original questions:

  1. Wrong. Mix detects umbrella projects when creating normal apps. When creating Phoenix apps, it detects nothing. The user must use mix phx.new.web. It is unclear when Mix is able to detect umbrella apps and when its not.
  2. --live flag is now default and not needed.
  3. Because I was creating the Phoenix app with an incorrect assumption and thus using the incorrect command.

Where Next?

Popular Frontend topics Top

brian
I’m working with a designer who created a design in Photoshop. I am mostly a Node.js and Android dev, but when I have worked with designe...
New
pillaiindu
I mean, when you render all the HTML at the server side and the data is sent through HTTP requests, except only if some tiny things are d...
New
david-j-m
Hi, have a svelte spa gallery site - repl here. Have a couple of category buttons - Oil on Canvas and WaterColor… Sidebar contains all im...
New
pavanforza
I have a requirement to extract data from firebase which is used to build serverless applications. Can we connect Firebase no-sql databa...
New
sona11
I have a 1D array of numbers and need help splitting them into groups using a jagged array so that I can perform a series of computations...
New
tomcatttttt
I’m trying to take the API from the site to get a seamless online game through the HTML5 API. It works in all browsers except Google Chro...
New
Fl4m3Ph03n1x
Background I have a fresh umbrella app and I am trying to create a Phoenix app inside it. However, even though I can create the Phoenix a...
New
JessicaW33
Hello All, How would you implement a navigation system in React Native? Could not find a way so I ask the community can someone help me ...
New
Fl4m3Ph03n1x
Background I have a custom component in my LiveView, which is basically a group of checkboxes. I want to add a new attribute to my custo...
New
jaeyson
would it be backwards if I’m learning react? last time I used UI library (aside from LiveView) was Elm (not much) and that was eons ago.
New

Other popular topics Top

Devtalk
Hello Devtalk World! Please let us know a little about who you are and where you’re from :nerd_face:
New
AstonJ
What chair do you have while working… and why? Is there a ‘best’ type of chair or working position for developers?
New
dasdom
No chair. I have a standing desk. This post was split into a dedicated thread from our thread about chairs :slight_smile:
New
DevotionGeo
I know that -t flag is used along with -i flag for getting an interactive shell. But I cannot digest what the man page for docker run com...
New
Exadra37
On modern versions of macOS, you simply can’t power on your computer, launch a text editor or eBook reader, and write or read, without a ...
New
AstonJ
Biggest jackpot ever apparently! :upside_down_face: I don’t (usually) gamble/play the lottery, but working on a program to predict the...
New
Help
I am trying to crate a game for the Nintendo switch, I wanted to use Java as I am comfortable with that programming language. Can you use...
New
New
PragmaticBookshelf
Author Spotlight: Tammy Coron @Paradox927 Gaming, and writing games in particular, is about passion, vision, experience, and immersio...
New
AstonJ
This is a very quick guide, you just need to: Download LM Studio: https://lmstudio.ai/ Click on search Type DeepSeek, then select the o...
New