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Merge pull request #96 from codecrafters-io/add-elixir
Add elixir
2 parents f478870 + c70483a commit 1284c0f

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‎compiled_starters/elixir/.codecrafters/compile.sh

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#!/bin/sh
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#
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# This script is used to compile your program on CodeCrafters
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#
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# This runs before .codecrafters/run.sh
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#
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# Learn more: https://codecrafters.io/program-interface
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set -e # Exit on failure
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mix escript.build
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mv codecrafters_http_server /tmp/codecrafters-build-http-server-elixir

‎compiled_starters/elixir/.codecrafters/run.sh

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#!/bin/sh
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#
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# This script is used to run your program on CodeCrafters
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#
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# This runs after .codecrafters/compile.sh
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#
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# Learn more: https://codecrafters.io/program-interface
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set -e # Exit on failure
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exec /tmp/codecrafters-build-http-server-elixir "$@"

‎compiled_starters/elixir/.formatter.exs

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

‎compiled_starters/elixir/.gitattributes

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* text=auto

‎compiled_starters/elixir/.gitignore

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# Ignore the compiled binary
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/codecrafters_http_server
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# The directory Mix will write compiled artifacts to.
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/_build/
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# If you run "mix test --cover", coverage assets end up here.
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/cover/
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# The directory Mix downloads your dependencies sources to.
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/deps/
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# Where third-party dependencies like ExDoc output generated docs.
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/doc/
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# Ignore .fetch files in case you like to edit your project deps locally.
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/.fetch
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# If the VM crashes, it generates a dump, let's ignore it too.
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erl_crash.dump
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# Also ignore archive artifacts (built via "mix archive.build").
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*.ez
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# Ignore package tarball (built via "mix hex.build").
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app-*.tar
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‎compiled_starters/elixir/README.md

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![progress-banner](https://codecrafters.io/landing/images/default_progress_banners/http-server.png)
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This is a starting point for Elixir solutions to the
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["Build Your Own HTTP server" Challenge](https://app.codecrafters.io/courses/http-server/overview).
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[HTTP](https://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol) is the
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protocol that powers the web. In this challenge, you'll build a HTTP/1.1 server
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that is capable of serving multiple clients.
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Along the way you'll learn about TCP servers,
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[HTTP request syntax](https://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html),
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and more.
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**Note**: If you're viewing this repo on GitHub, head over to
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[codecrafters.io](https://codecrafters.io) to try the challenge.
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# Passing the first stage
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The entry point for your HTTP server implementation is in `lib/main.ex`. Study
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and uncomment the relevant code, and push your changes to pass the first stage:
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```sh
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git add .
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git commit -m "pass 1st stage" # any msg
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git push origin master
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```
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Time to move on to the next stage!
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# Stage 2 & beyond
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Note: This section is for stages 2 and beyond.
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1. Ensure you have `mix` installed locally
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1. Run `./your_program.sh` to run your program, which is implemented in
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`lib/main.ex`.
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1. Commit your changes and run `git push origin master` to submit your solution
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to CodeCrafters. Test output will be streamed to your terminal.

‎compiled_starters/elixir/codecrafters.yml

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# Set this to true if you want debug logs.
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#
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# These can be VERY verbose, so we suggest turning them off
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# unless you really need them.
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debug: false
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# Use this to change the Elixir version used to run your code
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# on Codecrafters.
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#
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# Available versions: elixir-1.17
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language_pack: elixir-1.17

‎compiled_starters/elixir/lib/main.ex

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defmodule Server do
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use Application
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def start(_type, _args) do
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Supervisor.start_link([{Task, fn -> Server.listen() end}], strategy: :one_for_one)
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end
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def listen() do
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# You can use print statements as follows for debugging, they'll be visible when running tests.
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IO.puts("Logs from your program will appear here!")
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# Uncomment this block to pass the first stage
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#
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# # Since the tester restarts your program quite often, setting SO_REUSEADDR
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# # ensures that we don't run into 'Address already in use' errors
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# {:ok, socket} = :gen_tcp.listen(4221, [:binary, active: false, reuseaddr: true])
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# {:ok, _client} = :gen_tcp.accept(socket)
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end
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end
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defmodule CLI do
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def main(_args) do
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# Start the Server application
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{:ok, _pid} = Application.ensure_all_started(:codecrafters_http_server)
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# Run forever
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Process.sleep(:infinity)
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end
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end

‎compiled_starters/elixir/mix.exs

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defmodule App.MixProject do
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# NOTE: You do not need to change anything in this file.
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use Mix.Project
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def project do
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[
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app: :codecrafters_http_server,
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version: "1.0.0",
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elixir: "~> 1.17",
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start_permanent: Mix.env() == :prod,
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deps: deps(),
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escript: [main_module: CLI]
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]
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end
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# Run "mix help compile.app" to learn about applications.
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def application do
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[
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extra_applications: [:logger],
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mod: {Server, []}
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]
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end
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# Run "mix help deps" to learn about dependencies.
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defp deps do
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[
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# {:dep_from_hexpm, "~> 0.3.0"},
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# {:dep_from_git, git: "https://github.com/elixir-lang/my_dep.git", tag: "0.1.0"}
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]
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end
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end

‎compiled_starters/elixir/your_program.sh

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#!/bin/sh
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#
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# Use this script to run your program LOCALLY.
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#
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# Note: Changing this script WILL NOT affect how CodeCrafters runs your program.
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#
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# Learn more: https://codecrafters.io/program-interface
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set -e # Exit early if any commands fail
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# Copied from .codecrafters/compile.sh
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#
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# - Edit this to change how your program compiles locally
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# - Edit .codecrafters/compile.sh to change how your program compiles remotely
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(
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cd "$(dirname "$0")" # Ensure compile steps are run within the repository directory
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mix escript.build
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mv codecrafters_http_server /tmp/codecrafters-build-http-server-elixir
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)
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# Copied from .codecrafters/run.sh
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#
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# - Edit this to change how your program runs locally
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# - Edit .codecrafters/run.sh to change how your program runs remotely
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exec /tmp/codecrafters-build-http-server-elixir "$@"

‎dockerfiles/elixir-1.17.Dockerfile

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# syntax=docker/dockerfile:1.7-labs
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FROM elixir:1.17.2-alpine
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# Ensures the container is re-built if dependency files change
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ENV CODECRAFTERS_DEPENDENCY_FILE_PATHS="mix.exs"
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WORKDIR /app
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# .git & README.md are unique per-repository. We ignore them on first copy to prevent cache misses
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COPY --exclude=.git --exclude=README.md . /app
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# Install & cache deps
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RUN .codecrafters/compile.sh
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# If _build directory exists, move it to /app-cached
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RUN mkdir -p /app-cached
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RUN if [ -d "/app/_build" ]; then mv /app/_build /app-cached; fi

‎solutions/elixir/01-at4/code/.codecrafters/compile.sh

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#!/bin/sh
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#
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# This script is used to compile your program on CodeCrafters
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#
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# This runs before .codecrafters/run.sh
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#
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# Learn more: https://codecrafters.io/program-interface
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set -e # Exit on failure
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mix escript.build
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mv codecrafters_http_server /tmp/codecrafters-build-http-server-elixir

‎solutions/elixir/01-at4/code/.codecrafters/run.sh

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#!/bin/sh
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#
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# This script is used to run your program on CodeCrafters
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#
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# This runs after .codecrafters/compile.sh
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#
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# Learn more: https://codecrafters.io/program-interface
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set -e # Exit on failure
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exec /tmp/codecrafters-build-http-server-elixir "$@"

‎solutions/elixir/01-at4/code/.formatter.exs

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

‎solutions/elixir/01-at4/code/.gitattributes

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* text=auto

‎solutions/elixir/01-at4/code/.gitignore

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# Ignore the compiled binary
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/codecrafters_http_server
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# The directory Mix will write compiled artifacts to.
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/_build/
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# If you run "mix test --cover", coverage assets end up here.
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/cover/
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# The directory Mix downloads your dependencies sources to.
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/deps/
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# Where third-party dependencies like ExDoc output generated docs.
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/doc/
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# Ignore .fetch files in case you like to edit your project deps locally.
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/.fetch
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19+
# If the VM crashes, it generates a dump, let's ignore it too.
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erl_crash.dump
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# Also ignore archive artifacts (built via "mix archive.build").
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*.ez
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# Ignore package tarball (built via "mix hex.build").
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app-*.tar
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‎solutions/elixir/01-at4/code/README.md

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![progress-banner](https://codecrafters.io/landing/images/default_progress_banners/http-server.png)
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This is a starting point for Elixir solutions to the
4+
["Build Your Own HTTP server" Challenge](https://app.codecrafters.io/courses/http-server/overview).
5+
6+
[HTTP](https://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol) is the
7+
protocol that powers the web. In this challenge, you'll build a HTTP/1.1 server
8+
that is capable of serving multiple clients.
9+
10+
Along the way you'll learn about TCP servers,
11+
[HTTP request syntax](https://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html),
12+
and more.
13+
14+
**Note**: If you're viewing this repo on GitHub, head over to
15+
[codecrafters.io](https://codecrafters.io) to try the challenge.
16+
17+
# Passing the first stage
18+
19+
The entry point for your HTTP server implementation is in `lib/main.ex`. Study
20+
and uncomment the relevant code, and push your changes to pass the first stage:
21+
22+
```sh
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git add .
24+
git commit -m "pass 1st stage" # any msg
25+
git push origin master
26+
```
27+
28+
Time to move on to the next stage!
29+
30+
# Stage 2 & beyond
31+
32+
Note: This section is for stages 2 and beyond.
33+
34+
1. Ensure you have `mix` installed locally
35+
1. Run `./your_program.sh` to run your program, which is implemented in
36+
`lib/main.ex`.
37+
1. Commit your changes and run `git push origin master` to submit your solution
38+
to CodeCrafters. Test output will be streamed to your terminal.

‎solutions/elixir/01-at4/code/codecrafters.yml

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# Set this to true if you want debug logs.
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#
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# These can be VERY verbose, so we suggest turning them off
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# unless you really need them.
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debug: false
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# Use this to change the Elixir version used to run your code
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# on Codecrafters.
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#
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# Available versions: elixir-1.17
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language_pack: elixir-1.17

‎solutions/elixir/01-at4/code/lib/main.ex

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defmodule Server do
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use Application
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def start(_type, _args) do
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Supervisor.start_link([{Task, fn -> Server.listen() end}], strategy: :one_for_one)
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end
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def listen() do
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# Since the tester restarts your program quite often, setting SO_REUSEADDR
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# ensures that we don't run into 'Address already in use' errors
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{:ok, socket} = :gen_tcp.listen(4221, [:binary, active: false, reuseaddr: true])
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{:ok, _client} = :gen_tcp.accept(socket)
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end
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end
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defmodule CLI do
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def main(_args) do
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# Start the Server application
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{:ok, _pid} = Application.ensure_all_started(:codecrafters_http_server)
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# Run forever
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Process.sleep(:infinity)
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end
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end

‎solutions/elixir/01-at4/code/mix.exs

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defmodule App.MixProject do
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# NOTE: You do not need to change anything in this file.
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use Mix.Project
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def project do
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[
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app: :codecrafters_http_server,
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version: "1.0.0",
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elixir: "~> 1.17",
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start_permanent: Mix.env() == :prod,
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deps: deps(),
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escript: [main_module: CLI]
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]
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end
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# Run "mix help compile.app" to learn about applications.
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def application do
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[
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extra_applications: [:logger],
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mod: {Server, []}
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]
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end
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# Run "mix help deps" to learn about dependencies.
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defp deps do
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[
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# {:dep_from_hexpm, "~> 0.3.0"},
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# {:dep_from_git, git: "https://github.com/elixir-lang/my_dep.git", tag: "0.1.0"}
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]
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end
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end

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