Mix format fails on emojis

Questions / Help
1

Is it supposed to?

Stacktrace:

mix format failed for file: /.../backend/apps/web/lib/web/templates/session/new.html.eex
** (SyntaxError) /.../backend/apps/web/lib/web/templates/session/new.html.eex:2: unexpected token: "👋" (column 6, codepoint U+****)
    (elixir) lib/code.ex:442: Code.format_string!/2
    (mix) lib/mix/tasks/format.ex:293: Mix.Tasks.Format.format_file/3
    (elixir) lib/task/supervised.ex:88: Task.Supervised.do_apply/2
    (elixir) lib/task/supervised.ex:38: Task.Supervised.reply/5
    (stdlib) proc_lib.erl:247: :proc_lib.init_p_do_apply/3
2 Likes
2

mix format is capable of formatting eex files? Didn’t know that and consider this a dangerous feature, we could affect the hosts languages semantic…

Anyway, can you please show a full example file which causes that issue? Especially it’s important if this happens when the emoji is embedded or in the host part, or if it doesn’t matter.

3

mix format is capable of formatting eex files?

Sublime Test elixir plugin seems to be trying to format them on save.

can you please show a full example file which causes that issue?

<div class="mt5">
  <p>👋</p>
  <p>localhost welcomes you</p>
  <div class="bg-white w-third center pa3">
    <%= form_for @conn, session_path(@conn, :create), [as: :session], fn f -> %>

<!-- etc. -->

Opening < html tags also seem to give it troubles.

<div>
  join localhost

  create your personal account

  <%= form_for @changeset, user_path(@conn, :create), fn u -> %>
    <label>
      Name: <%= text_input(u, :handle) %>
    </label>

    <%= submit("Submit") %>
  <% end %>
</div>

causes

mix format failed for file: /.../backend/apps/web/lib/web/templates/user/new.html.eex
** (SyntaxError) /.../backend/apps/web/lib/web/templates/user/new.html.eex:1: syntax error before: '<'
    (elixir) lib/code.ex:442: Code.format_string!/2
    (mix) lib/mix/tasks/format.ex:293: Mix.Tasks.Format.format_file/3
    (elixir) lib/task/supervised.ex:88: Task.Supervised.do_apply/2
    (elixir) lib/task/supervised.ex:38: Task.Supervised.reply/5
    (stdlib) proc_lib.erl:247: :proc_lib.init_p_do_apply/3
4

It seems to want them to format them as plain elixir files, please deactivate the feature in sublime for eex files.

3 Likes
5

Added a .formatter.exs file into the root of this phoenix project with the following

# Used by "mix format"
[
  inputs: ["mix.exs", "{config,lib,test}/**/*.{ex,exs}"]
]

and the attempts to format .eex files appear to have stopped.

Thanks!

UPDATE: actually, not. Still tries to format on save sometimes, but not every time.

2 Likes
6

Sounds like a bug in your IDE’s plugin, should report it. :slight_smile: