Add elixir support

compiled_starters/elixir/.codecrafters/compile.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+#
+# This script is used to compile your program on CodeCrafters
+#
+# This runs before .codecrafters/run.sh
+#
+# Learn more: https://codecrafters.io/program-interface
+
+set -e # Exit on failure
+
+mix escript.build
+mv codecrafters_shell /tmp/codecrafters-build-shell-elixir

compiled_starters/elixir/.codecrafters/run.sh

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

compiled_starters/elixir/.formatter.exs

@@ -0,0 +1,4 @@
+# Used by "mix format"
+[
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]

compiled_starters/elixir/.gitattributes

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+* text=auto

compiled_starters/elixir/.gitignore

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

compiled_starters/elixir/README.md

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+![progress-banner](https://codecrafters.io/landing/images/default_progress_banners/shell.png)
+
+This is a starting point for Elixir solutions to the
+["Build Your Own Shell" Challenge](https://app.codecrafters.io/courses/shell/overview).
+
+In this challenge, you'll build your own POSIX compliant shell that's capable of
+interpreting shell commands, running external programs and builtin commands like
+cd, pwd, echo and more. Along the way, you'll learn about shell command parsing,
+REPLs, builtin commands, and more.
+
+**Note**: If you're viewing this repo on GitHub, head over to
+[codecrafters.io](https://codecrafters.io) to try the challenge.
+
+# Passing the first stage
+
+The entry point for your `shell` implementation is in `lib/main.ex`. Study and
+uncomment the relevant code, and push your changes to pass the first stage:
+
+```sh
+git add .
+git commit -m "pass 1st stage" # any msg
+git push origin master
+```
+
+Time to move on to the next stage!
+
+# Stage 2 & beyond
+
+Note: This section is for stages 2 and beyond.
+
+1. Ensure you have `mix` installed locally
+1. Run `./your_program.sh` to run your program, which is implemented in
+   `lib/main.ex`.
+1. Commit your changes and run `git push origin master` to submit your solution
+   to CodeCrafters. Test output will be streamed to your terminal.

compiled_starters/elixir/codecrafters.yml

@@ -0,0 +1,11 @@
+# Set this to true if you want debug logs.
+#
+# These can be VERY verbose, so we suggest turning them off
+# unless you really need them.
+debug: false
+
+# Use this to change the Elixir version used to run your code
+# on Codecrafters.
+#
+# Available versions: elixir-1.17
+language_pack: elixir-1.17

compiled_starters/elixir/lib/main.ex

@@ -0,0 +1,9 @@
+defmodule CLI do
+  def main(_args) do
+    # Uncomment this block to pass the first stage
+    # IO.write("$ ")
+
+    # Wait for user input
+    IO.read(:line)
+  end
+end

compiled_starters/elixir/mix.exs

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

compiled_starters/elixir/your_program.sh

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

dockerfiles/elixir-1.17.Dockerfile

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

solutions/elixir/01-oo8/code/.codecrafters/compile.sh

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

solutions/elixir/01-oo8/code/.codecrafters/run.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+#
+# This script is used to run your program on CodeCrafters
+#
+# This runs after .codecrafters/compile.sh
+#
+# Learn more: https://codecrafters.io/program-interface
+
+set -e # Exit on failure
+
+exec /tmp/codecrafters-build-shell-elixir "$@"

solutions/elixir/01-oo8/code/.formatter.exs

@@ -0,0 +1,4 @@
+# Used by "mix format"
+[
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]

solutions/elixir/01-oo8/code/.gitattributes

@@ -0,0 +1 @@
+* text=auto

solutions/elixir/01-oo8/code/.gitignore

@@ -0,0 +1,27 @@
+# Ignore the compiled binary
+/codecrafters_shell
+
+# The directory Mix will write compiled artifacts to.
+/_build/
+
+# If you run "mix test --cover", coverage assets end up here.
+/cover/
+
+# The directory Mix downloads your dependencies sources to.
+/deps/
+
+# Where third-party dependencies like ExDoc output generated docs.
+/doc/
+
+# Ignore .fetch files in case you like to edit your project deps locally.
+/.fetch
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+erl_crash.dump
+
+# Also ignore archive artifacts (built via "mix archive.build").
+*.ez
+
+# Ignore package tarball (built via "mix hex.build").
+app-*.tar
+

solutions/elixir/01-oo8/code/README.md

@@ -0,0 +1,35 @@
+![progress-banner](https://codecrafters.io/landing/images/default_progress_banners/shell.png)
+
+This is a starting point for Elixir solutions to the
+["Build Your Own Shell" Challenge](https://app.codecrafters.io/courses/shell/overview).
+
+In this challenge, you'll build your own POSIX compliant shell that's capable of
+interpreting shell commands, running external programs and builtin commands like
+cd, pwd, echo and more. Along the way, you'll learn about shell command parsing,
+REPLs, builtin commands, and more.
+
+**Note**: If you're viewing this repo on GitHub, head over to
+[codecrafters.io](https://codecrafters.io) to try the challenge.
+
+# Passing the first stage
+
+The entry point for your `shell` implementation is in `lib/main.ex`. Study and
+uncomment the relevant code, and push your changes to pass the first stage:
+
+```sh
+git add .
+git commit -m "pass 1st stage" # any msg
+git push origin master
+```
+
+Time to move on to the next stage!
+
+# Stage 2 & beyond
+
+Note: This section is for stages 2 and beyond.
+
+1. Ensure you have `mix` installed locally
+1. Run `./your_program.sh` to run your program, which is implemented in
+   `lib/main.ex`.
+1. Commit your changes and run `git push origin master` to submit your solution
+   to CodeCrafters. Test output will be streamed to your terminal.

solutions/elixir/01-oo8/code/codecrafters.yml

@@ -0,0 +1,11 @@
+# Set this to true if you want debug logs.
+#
+# These can be VERY verbose, so we suggest turning them off
+# unless you really need them.
+debug: false
+
+# Use this to change the Elixir version used to run your code
+# on Codecrafters.
+#
+# Available versions: elixir-1.17
+language_pack: elixir-1.17

solutions/elixir/01-oo8/code/lib/main.ex

@@ -0,0 +1,8 @@
+defmodule CLI do
+  def main(_args) do
+    IO.write("$ ")
+
+    # Wait for user input
+    IO.read(:line)
+  end
+end

solutions/elixir/01-oo8/code/mix.exs

@@ -0,0 +1,30 @@
+defmodule App.MixProject do
+  # NOTE: You do not need to change anything in this file.
+  use Mix.Project
+
+  def project do
+    [
+      app: :codecrafters_shell,
+      version: "1.0.0",
+      elixir: "~> 1.17",
+      start_permanent: Mix.env() == :prod,
+      deps: deps(),
+      escript: [main_module: CLI]
+    ]
+  end
+
+  # Run "mix help compile.app" to learn about applications.
+  def application do
+    [
+      extra_applications: [:logger]
+    ]
+  end
+
+  # Run "mix help deps" to learn about dependencies.
+  defp deps do
+    [
+      # {:dep_from_hexpm, "~> 0.3.0"},
+      # {:dep_from_git, git: "https://github.com/elixir-lang/my_dep.git", tag: "0.1.0"}
+    ]
+  end
+end

solutions/elixir/01-oo8/code/your_program.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+#
+# Use this script to run your program LOCALLY.
+#
+# Note: Changing this script WILL NOT affect how CodeCrafters runs your program.
+#
+# Learn more: https://codecrafters.io/program-interface
+
+set -e # Exit early if any commands fail
+
+# Copied from .codecrafters/compile.sh
+#
+# - Edit this to change how your program compiles locally
+# - Edit .codecrafters/compile.sh to change how your program compiles remotely
+(
+  cd "$(dirname "$0")" # Ensure compile steps are run within the repository directory
+  mix escript.build
+  mv codecrafters_shell /tmp/codecrafters-build-shell-elixir
+)
+
+# Copied from .codecrafters/run.sh
+#
+# - Edit this to change how your program runs locally
+# - Edit .codecrafters/run.sh to change how your program runs remotely
+exec /tmp/codecrafters-build-shell-elixir "$@"

solutions/elixir/01-oo8/diff/lib/main.ex.diff

@@ -0,0 +1,11 @@
+@@ -1,9 +1,8 @@
+ defmodule CLI do
+   def main(_args) do
+-    # Uncomment this block to pass the first stage
+-    # IO.write("$ ")
++    IO.write("$ ")
+
+     # Wait for user input
+     IO.read(:line)
+   end
+ end

solutions/elixir/01-oo8/explanation.md

@@ -0,0 +1,16 @@
+The entry point for your Shell implementation is in `lib/main.ex`.
+
+Study and uncomment the relevant code: 
+
+```elixir
+# Uncomment this block to pass the first stage
+IO.write("$ ")
+```
+
+Push your changes to pass the first stage:
+
+```
+git add .
+git commit -m "pass 1st stage" # any msg
+git push origin master
+```