Add Scala support

compiled_starters/scala/.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
+
+# The option is needed for Java 17+ to allow native memory access operations.
+SBT_OPTS="--enable-native-access=ALL-UNNAMED" sbt assembly

compiled_starters/scala/.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 java -jar "$(dirname "$0")/target/scala-3.7.4/http-server.jar" "$@"

compiled_starters/scala/.gitattributes

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

compiled_starters/scala/.gitignore

@@ -0,0 +1,28 @@
+# macOS
+.DS_Store
+
+# sbt specific
+dist/*
+debug/
+target/
+lib_managed/
+src_managed/
+project/boot/
+project/plugins/project/
+project/local-plugins.sbt
+.history
+.ensime
+.ensime_cache/
+.sbt-scripted/
+local.sbt
+
+# Bloop
+.bsp
+
+# VS Code
+.vscode/
+
+# Metals
+.bloop/
+.metals/
+metals.sbt

compiled_starters/scala/README.md

@@ -0,0 +1,38 @@
+![progress-banner](https://codecrafters.io/landing/images/default_progress_banners/http-server.png)
+
+This is a starting point for Scala solutions to the
+["Build Your Own HTTP server" Challenge](https://app.codecrafters.io/courses/http-server/overview).
+
+[HTTP](https://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol) is the
+protocol that powers the web. In this challenge, you'll build a HTTP/1.1 server
+that is capable of serving multiple clients.
+
+Along the way you'll learn about TCP servers,
+[HTTP request syntax](https://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html),
+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 HTTP server implementation is in
+`src/main/scala/codecrafters_http_server/App.scala`. Study and uncomment the
+relevant code, and push your changes to pass the first stage:
+
+```sh
+git commit -am "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 `sbt (1.11.7)` installed locally
+1. Run `./your_program.sh` to run your program, which is implemented in
+   `src/main/scala/codecrafters_http_server/App.scala`.
+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/scala/build.sbt

@@ -0,0 +1,14 @@
+ThisBuild / scalaVersion     := "3.7.4"
+ThisBuild / version          := "0.1.0-SNAPSHOT"
+ThisBuild / organization     := "com.codecrafters"
+ThisBuild / organizationName := "CodeCrafters"
+
+assembly / assemblyJarName := "http-server.jar"
+
+lazy val root = (project in file("."))
+  .settings(
+    name := "codecrafter-http-server",
+    // List your dependencies here
+    libraryDependencies ++= Seq(
+    )
+  )

compiled_starters/scala/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 Scala version used to run your code
+# on Codecrafters.
+#
+# Available versions: scala-3.7
+buildpack: scala-3.7

compiled_starters/scala/project/assembly.sbt

@@ -0,0 +1 @@
+addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "2.3.1")

compiled_starters/scala/project/build.properties

@@ -0,0 +1 @@
+sbt.version=1.11.7

compiled_starters/scala/src/main/scala/codecrafters_http_server/App.scala

@@ -0,0 +1,25 @@
+package codecrafters_http_server
+
+import java.io.IOException
+import java.net.ServerSocket
+
+object Main extends App {
+  // You can use print statements as follows for debugging, they'll be visible when running tests.
+  System.err.println("Logs from your program will appear here!")
+
+  // TODO: Uncomment the code below to pass the first stage
+  //
+  // try {
+  //   val serverSocket = new ServerSocket(4221)
+  //
+  //   // Since the tester restarts your program quite often, setting SO_REUSEADDR
+  //   // ensures that we don't run into 'Address already in use' errors
+  //   serverSocket.setReuseAddress(true)
+  //
+  //   serverSocket.accept() // Wait for connection from client.
+  //   println("accepted new connection")
+  // } catch {
+  //   case e: IOException =>
+  //     println(s"IOException: ${e.getMessage}")
+  // }
+}

compiled_starters/scala/your_program.sh

@@ -0,0 +1,24 @@
+#!/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 "$0")" # Ensure compile steps are run within the repository directory
+  SBT_OPTS="--enable-native-access=ALL-UNNAMED" sbt assembly
+)
+
+# Copied from .codecrafters/run.sh
+#
+# - Edit this to change how your program runs locally
+# - Edit .codecrafters/run.sh to change how your program runs remotely
+exec java -jar "$(dirname "$0")/target/scala-3.7.4/http-server.jar" "$@"

course-definition.yml

@@ -79,6 +79,7 @@ languages:
   - slug: "python"
   - slug: "ruby"
   - slug: "rust"
+  - slug: "scala"
   - slug: "typescript"
   - slug: "zig"
 

dockerfiles/scala-3.7.Dockerfile

@@ -0,0 +1,27 @@
+# syntax=docker/dockerfile:1.7-labs
+FROM maven:3.9.9-eclipse-temurin-24-noble
+
+ENV CODECRAFTERS_DEPENDENCY_FILE_PATHS="build.sbt,project/assembly.sbt,project/build.properties"
+
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+
+RUN echo "deb https://repo.scala-sbt.org/scalasbt/debian all main" | tee /etc/apt/sources.list.d/sbt.list
+
+RUN echo "deb https://repo.scala-sbt.org/scalasbt/debian /" | tee /etc/apt/sources.list.d/sbt_old.list 
+
+RUN curl -sL "https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x2EE0EA64E40A89B84B2DF73499E82A75642AC823" | gpg --no-default-keyring --keyring gnupg-ring:/etc/apt/trusted.gpg.d/scalasbt-release.gpg --import && \
+    chmod 644 /etc/apt/trusted.gpg.d/scalasbt-release.gpg
+
+RUN apt-get update && \
+    apt-get install --no-install-recommends sbt=1.11.7 -yqq && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+ENV PATH=/usr/local/sbt/bin:$PATH
+
+# .git & README.md are unique per-repository. We ignore them on first copy to prevent cache misses
+COPY --exclude=.git --exclude=README.md . /app
+
+WORKDIR /app
+
+RUN .codecrafters/compile.sh

solutions/scala/01-at4/code/.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
+
+# The option is needed for Java 17+ to allow native memory access operations.
+SBT_OPTS="--enable-native-access=ALL-UNNAMED" sbt assembly

solutions/scala/01-at4/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 java -jar "$(dirname "$0")/target/scala-3.7.4/http-server.jar" "$@"

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

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

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

@@ -0,0 +1,28 @@
+# macOS
+.DS_Store
+
+# sbt specific
+dist/*
+debug/
+target/
+lib_managed/
+src_managed/
+project/boot/
+project/plugins/project/
+project/local-plugins.sbt
+.history
+.ensime
+.ensime_cache/
+.sbt-scripted/
+local.sbt
+
+# Bloop
+.bsp
+
+# VS Code
+.vscode/
+
+# Metals
+.bloop/
+.metals/
+metals.sbt

solutions/scala/01-at4/code/README.md

@@ -0,0 +1,38 @@
+![progress-banner](https://codecrafters.io/landing/images/default_progress_banners/http-server.png)
+
+This is a starting point for Scala solutions to the
+["Build Your Own HTTP server" Challenge](https://app.codecrafters.io/courses/http-server/overview).
+
+[HTTP](https://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol) is the
+protocol that powers the web. In this challenge, you'll build a HTTP/1.1 server
+that is capable of serving multiple clients.
+
+Along the way you'll learn about TCP servers,
+[HTTP request syntax](https://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html),
+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 HTTP server implementation is in
+`src/main/scala/codecrafters_http_server/App.scala`. Study and uncomment the
+relevant code, and push your changes to pass the first stage:
+
+```sh
+git commit -am "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 `sbt (1.11.7)` installed locally
+1. Run `./your_program.sh` to run your program, which is implemented in
+   `src/main/scala/codecrafters_http_server/App.scala`.
+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/scala/01-at4/code/build.sbt

@@ -0,0 +1,14 @@
+ThisBuild / scalaVersion     := "3.7.4"
+ThisBuild / version          := "0.1.0-SNAPSHOT"
+ThisBuild / organization     := "com.codecrafters"
+ThisBuild / organizationName := "CodeCrafters"
+
+assembly / assemblyJarName := "http-server.jar"
+
+lazy val root = (project in file("."))
+  .settings(
+    name := "codecrafter-http-server",
+    // List your dependencies here
+    libraryDependencies ++= Seq(
+    )
+  )

solutions/scala/01-at4/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 Scala version used to run your code
+# on Codecrafters.
+#
+# Available versions: scala-3.7
+buildpack: scala-3.7

solutions/scala/01-at4/code/project/assembly.sbt

@@ -0,0 +1 @@
+addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "2.3.1")

solutions/scala/01-at4/code/project/build.properties

@@ -0,0 +1 @@
+sbt.version=1.11.7

solutions/scala/01-at4/code/src/main/scala/codecrafters_http_server/App.scala

@@ -0,0 +1,20 @@
+package codecrafters_http_server
+
+import java.io.IOException
+import java.net.ServerSocket
+
+object Main extends App {
+  try {
+    val serverSocket = new ServerSocket(4221)
+
+    // Since the tester restarts your program quite often, setting SO_REUSEADDR
+    // ensures that we don't run into 'Address already in use' errors
+    serverSocket.setReuseAddress(true)
+
+    serverSocket.accept() // Wait for connection from client.
+    println("accepted new connection")
+  } catch {
+    case e: IOException =>
+      println(s"IOException: ${e.getMessage}")
+  }
+}

solutions/scala/01-at4/code/your_program.sh

@@ -0,0 +1,24 @@
+#!/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 "$0")" # Ensure compile steps are run within the repository directory
+  SBT_OPTS="--enable-native-access=ALL-UNNAMED" sbt assembly
+)
+
+# Copied from .codecrafters/run.sh
+#
+# - Edit this to change how your program runs locally
+# - Edit .codecrafters/run.sh to change how your program runs remotely
+exec java -jar "$(dirname "$0")/target/scala-3.7.4/http-server.jar" "$@"