Introduction

An OTP application to auto compile changed files into an erlang node.

Dependencies

edt uses fs to be notified on files changes and requires a platform specific fs backend to be installed which can be installed like

Mac

brew install fswatch

Linux

<install> inotify-tools

How to use

Add the following line to the rebar3 profile of your choice

 {edt, "", {git, "https://github.com/raghavkarol/edt.git", {branch, "master"}}}

Then start and erlang node like

(REBAR3_PROFILE=<profile> ; rebar3 as <profile> shell --apps edt)

Now editing and changing a file will automatically reload

Post actions

Post actions are executed on successful compile and reload of a module. For example to run tests eunit tests in a module do:

 1> edt_post_action:add(
    _Name = test_1, _
    Action = fun() ->
      edt_api:test(module_with_eunit_tests)
    end).

 2> edt_post_action:add(
     _Name = test_2,
     _Action = fun() ->
       edt_api:test(ct_SUITE)
     end).

There can be multiple post actions are are executed in the Name order.

Emacs flycheck backend

To use as a flymake backend we can extend flycheck-rebar3 available on ELPA with the following configuration.

(flycheck-define-checker erlang-edt-flycheck
    "An Erlang syntax checker using the edt  server."
    :command ("~/bin/flycheck_edt" (eval (buffer-file-name)))
    :error-parser flycheck-parse-with-patterns-without-color
    :error-patterns
    ((warning line-start
              (file-name) ":" line ": Warning:" (message) line-end)
     (error line-start
            (file-name) ":" line ": " (message) line-end))
    :modes erlang-mode
    :enabled flycheck-rebar3-project-root
    :predicate flycheck-buffer-saved-p
    :working-directory flycheck-rebar3-project-root)

  (add-to-list 'flycheck-checkers 'erlang-edt-flycheck)

See flycheck_edt

EDT Profile

What is edt_profile, examples of how to use it.

Supported environment variables

EDT_PROFILE_TRACK_CALLS=true
EDT_PROFILE_MAX_CALLS=1000
EDT_PROFILE_CAPTURE=true