Arxius de vscode - Another dev

Erlang is a functional and concurrent programming language and fault tolerant.

Now we will see how to develop Erlang on Vscode

Install Erlang

To start programming in Erlang we need two things, the Erlang environment and rebar3 , a tool to help manage Erlang projects.

To install Erlang just run as root:

apt-get install erlang

Once we have Erlang installed we can install rebar3 :

wget https://github.com/erlang/rebar3/releases/download/3.18.0/rebar3
chmod +x rebar3
./rebar3 local install

After this, the rebar3 executable should be in $HOME/.local/bin/rebar3. Ensure that the .local/bin folder is on your PATH variable to be able to execute rebar3 from the shell.

Install Erlang extensions

Install the Erlang extension using Control+P and execute this:

ext install pgourlain.erlang

Run Erlang on vscode

If we want to run an Erlang application from vscode we need to create a launch.json like this:

{
    "name": "Launch erlang",
    "type": "erlang",
    "request": "launch",
    "cwd": "${workspaceRoot}",
    "arguments": "-s module start"
}

Debug Erlang on vscode

To debug an Erlang application we need to do a previous step. We need to complie the beam files with the +debug_info flag

To do this we need to create a task.json like this

{
    "label": "compile",
    "type": "shell",
    "command": "erlc +debug_info file1.erl file2.erl"
}

And add the preLanuchTask on the launch.json

{
    "name": "Launch erlang",
    "type": "erlang",
    "request": "launch",
    "cwd": "${workspaceRoot}",
    "arguments": "-s module start",
    "preLaunchTask": "compile"
}

Now you will be able to debug an Erlang application from vscode

Visual studio code remote ssh

To remote debug (and develop) with Visual Studio code you mus to install Remote ssh extenison

Once you install it, you can add a host that looks like this:

Add a new host on remote ssh.

And finally open a remote project:

Connect to a remote ssh and run a script.

After this, you can use Visual Studio code like on your own machine

PUDB

Pudb is a package to debug python applications via CLI. If you are used to and feel comfortable using CLI tools this can be a good tool to debug your python application.

To debug it with pudb you need to install the package with pip:

pip install pudb

On your code , add the following code where you want to stop:

import pudb;pu.db

Once the execution reaches the previous line, you will get a window that looks like this:

You can use the following shortcuts to interact with the pudb:

Ctrl+x: Go to command line or return to the code

n: Step to the next instruction

s: Step into

c: Continue

b: Toggle breakpoint

Etiqueta: vscode

Develop Erlang on Vscode