Add ocaml support

compiled_starters/ocaml/.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
+
+dune build --build-dir /tmp/codecrafters-build-redis-ocaml

compiled_starters/ocaml/.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-redis-ocaml/default/main.exe "$@"

compiled_starters/ocaml/.gitattributes

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+* text=auto

compiled_starters/ocaml/.ocamlformat

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+profile = default

compiled_starters/ocaml/README.md

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+![progress-banner](https://codecrafters.io/landing/images/default_progress_banners/redis.png)
+
+This is a starting point for OCaml solutions to the
+["Build Your Own Redis" Challenge](https://codecrafters.io/challenges/redis).
+
+In this challenge, you'll build a toy Redis clone that's capable of handling
+basic commands like `PING`, `SET` and `GET`. Along the way we'll learn about
+event loops, the Redis protocol 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 Redis implementation is in `src/main.ml`. 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
+```
+
+That's all!
+
+# Stage 2 & beyond
+
+Note: This section is for stages 2 and beyond.
+
+1. Ensure you have `dune` installed locally
+1. Run `./your_program.sh` to run your Redis server, which is implemented in
+   `src/main.ml`.
+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/ocaml/codecrafters.yml

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+# 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 OCaml version used to run your code
+# on Codecrafters.
+#
+# Available versions: ocaml-5.2.0
+language_pack: ocaml-5.2.0

compiled_starters/ocaml/codecrafters_redis.opam

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+# This file is generated by dune, edit dune-project instead
+opam-version: "2.0"
+version: "0.1"
+synopsis: "Starter code for the Build your own Redis challenge"
+maintainer: ["CodeCrafters <hello@codecrafters.io>"]
+authors: ["CodeCrafters <hello@codecrafters.io>"]
+license: "MIT"
+homepage: "https://codecrafters.io"
+bug-reports: "https://github.com/codecrafters-io/build-your-own-redis/issues"
+depends: [
+  "dune" {>= "3.16"}
+  "odoc" {with-doc}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]

compiled_starters/ocaml/dune

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+(include_subdirs unqualified)
+
+(executable
+ (name main)
+ (libraries unix))

compiled_starters/ocaml/dune-project

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+(lang dune 3.16)
+
+(name codecrafters_redis)
+
+(generate_opam_files true)
+
+(package
+ (name codecrafters_redis)
+ (maintainers "CodeCrafters <hello@codecrafters.io>")
+ (authors "CodeCrafters <hello@codecrafters.io>")
+ (synopsis "Starter code for the Build your own Redis challenge")
+ (homepage "https://codecrafters.io")
+ (bug_reports
+  "https://github.com/codecrafters-io/build-your-own-redis/issues")
+ (license "MIT")
+ (allow_empty true)
+ (version 0.1))

compiled_starters/ocaml/src/main.ml

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+open Unix
+
+let () =
+  (* You can use print statements as follows for debugging, they'll be visible when running tests. *)
+  Printf.eprintf "Logs from your program will appear here!\n";
+
+  (* Create a TCP server socket *)
+  let server_socket = socket PF_INET SOCK_STREAM 0 in
+  setsockopt server_socket SO_REUSEADDR true;
+  bind server_socket (ADDR_INET (inet_addr_of_string "127.0.0.1", 6379));
+  listen server_socket 1;
+
+  (* Uncomment this block to pass the first stage *)
+  (* let (client_socket, _) = accept server_socket in *)
+  (* close client_socket; *)
+  (* close server_socket *)

compiled_starters/ocaml/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 "$0")" # Ensure compile steps are run within the repository directory
+  dune build --build-dir /tmp/codecrafters-build-redis-ocaml
+)
+
+# Copied from .codecrafters/run.sh
+#
+# - Edit this to change how your program runs locally
+# - Edit .codecrafters/run.sh to change how your program runs remotely
+exec /tmp/codecrafters-build-redis-ocaml/default/main.exe "$@"

dockerfiles/ocaml-5.2.0.Dockerfile

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+# syntax=docker/dockerfile:1.7-labs
+FROM ocaml/opam:alpine-3.20-ocaml-5.2
+
+# The image uses opam as the user, so let's set OPAMROOT to re-use whatever is already built
+ENV OPAMROOT /home/opam/.opam
+
+# Ensures the container is re-built if dune/dune-project changes
+ENV CODECRAFTERS_DEPENDENCY_FILE_PATHS="dune,dune-project"
+
+# Change to root user. All other images seem to use root, so let's do the same here
+# hadolint ignore=DL3002
+USER root
+
+# Install dune
+RUN opam update && opam install dune.3.16.0 --yes
+
+# Dune path is /home/opam/.opam/5.2/bin/dune
+ENV PATH="${OPAMROOT}/5.2/bin:${PATH}"
+
+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
+
+# Cache dependencies
+RUN opam install . --yes
+
+# This runs dune build
+RUN .codecrafters/compile.sh
+
+# Once the heavy steps are done, we can copy all files back
+COPY . /app

solutions/ocaml/01-jm1/code/.codecrafters/compile.sh

@@ -0,0 +1,11 @@
+#!/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
+
+dune build --build-dir /tmp/codecrafters-build-redis-ocaml

solutions/ocaml/01-jm1/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-redis-ocaml/default/main.exe "$@"

solutions/ocaml/01-jm1/code/.gitattributes

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

solutions/ocaml/01-jm1/code/.ocamlformat

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+profile = default

solutions/ocaml/01-jm1/code/README.md

@@ -0,0 +1,34 @@
+![progress-banner](https://codecrafters.io/landing/images/default_progress_banners/redis.png)
+
+This is a starting point for OCaml solutions to the
+["Build Your Own Redis" Challenge](https://codecrafters.io/challenges/redis).
+
+In this challenge, you'll build a toy Redis clone that's capable of handling
+basic commands like `PING`, `SET` and `GET`. Along the way we'll learn about
+event loops, the Redis protocol 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 Redis implementation is in `src/main.ml`. 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
+```
+
+That's all!
+
+# Stage 2 & beyond
+
+Note: This section is for stages 2 and beyond.
+
+1. Ensure you have `dune` installed locally
+1. Run `./your_program.sh` to run your Redis server, which is implemented in
+   `src/main.ml`.
+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/ocaml/01-jm1/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 OCaml version used to run your code
+# on Codecrafters.
+#
+# Available versions: ocaml-5.2.0
+language_pack: ocaml-5.2.0

solutions/ocaml/01-jm1/code/codecrafters_redis.opam

@@ -0,0 +1,27 @@
+# This file is generated by dune, edit dune-project instead
+opam-version: "2.0"
+version: "0.1"
+synopsis: "Starter code for the Build your own Redis challenge"
+maintainer: ["CodeCrafters <hello@codecrafters.io>"]
+authors: ["CodeCrafters <hello@codecrafters.io>"]
+license: "MIT"
+homepage: "https://codecrafters.io"
+bug-reports: "https://github.com/codecrafters-io/build-your-own-redis/issues"
+depends: [
+  "dune" {>= "3.16"}
+  "odoc" {with-doc}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]

solutions/ocaml/01-jm1/code/dune

@@ -0,0 +1,5 @@
+(include_subdirs unqualified)
+
+(executable
+ (name main)
+ (libraries unix))

solutions/ocaml/01-jm1/code/dune-project

@@ -0,0 +1,17 @@
+(lang dune 3.16)
+
+(name codecrafters_redis)
+
+(generate_opam_files true)
+
+(package
+ (name codecrafters_redis)
+ (maintainers "CodeCrafters <hello@codecrafters.io>")
+ (authors "CodeCrafters <hello@codecrafters.io>")
+ (synopsis "Starter code for the Build your own Redis challenge")
+ (homepage "https://codecrafters.io")
+ (bug_reports
+  "https://github.com/codecrafters-io/build-your-own-redis/issues")
+ (license "MIT")
+ (allow_empty true)
+ (version 0.1))

solutions/ocaml/01-jm1/code/src/main.ml

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+open Unix
+
+let () =
+  (* Create a TCP server socket *)
+  let server_socket = socket PF_INET SOCK_STREAM 0 in
+  setsockopt server_socket SO_REUSEADDR true;
+  bind server_socket (ADDR_INET (inet_addr_of_string "127.0.0.1", 6379));
+  listen server_socket 1;
+
+  let (client_socket, _) = accept server_socket in
+  close client_socket;
+  close server_socket

solutions/ocaml/01-jm1/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 "$0")" # Ensure compile steps are run within the repository directory
+  dune build --build-dir /tmp/codecrafters-build-redis-ocaml
+)
+
+# Copied from .codecrafters/run.sh
+#
+# - Edit this to change how your program runs locally
+# - Edit .codecrafters/run.sh to change how your program runs remotely
+exec /tmp/codecrafters-build-redis-ocaml/default/main.exe "$@"

solutions/ocaml/01-jm1/diff/src/main.ml.diff

@@ -0,0 +1,20 @@
+@@ -1,16 +1,12 @@
+ open Unix
+
+ let () =
+-  (* You can use print statements as follows for debugging, they'll be visible when running tests. *)
+-  Printf.eprintf "Logs from your program will appear here!\n";
+-
+   (* Create a TCP server socket *)
+   let server_socket = socket PF_INET SOCK_STREAM 0 in
+   setsockopt server_socket SO_REUSEADDR true;
+   bind server_socket (ADDR_INET (inet_addr_of_string "127.0.0.1", 6379));
+   listen server_socket 1;
+
+-  (* Uncomment this block to pass the first stage *)
+-  (* let (client_socket, _) = accept server_socket in *)
+-  (* close client_socket; *)
+-  (* close server_socket *)
++  let (client_socket, _) = accept server_socket in
++  close client_socket;
++  close server_socket