NIX: flake.nix for development environment

.direnv/bin/nix-direnv-reload

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+set -e
+if [[ ! -d "/Users/andrew/personal/Projects/C/image_processor" ]]; then
+  echo "Cannot find source directory; Did you move it?"
+  echo "(Looking for "/Users/andrew/personal/Projects/C/image_processor")"
+  echo 'Cannot force reload with this script - use "direnv reload" manually and then try again'
+  exit 1
+fi
+
+# rebuild the cache forcefully
+_nix_direnv_force_reload=1 direnv exec "/Users/andrew/personal/Projects/C/image_processor" true
+
+# Update the mtime for .envrc.
+# This will cause direnv to reload again - but without re-building.
+touch "/Users/andrew/personal/Projects/C/image_processor/.envrc"
+
+# Also update the timestamp of whatever profile_rc we have.
+# This makes sure that we know we are up to date.
+touch -r "/Users/andrew/personal/Projects/C/image_processor/.envrc" "/Users/andrew/personal/Projects/C/image_processor/.direnv"/*.rc

.direnv/nix-profile-25.11-dwh1bd8g809r0kgr

@@ -0,0 +1 @@
+/nix/store/yy3zc65ij95wfnap3zqcr44kc4wzwlbq-nix-shell-env

.envrc

@@ -0,0 +1 @@
+use nix

CMakeLists.txt

@@ -14,9 +14,10 @@ set(LIB_SOURCES
         src/imgio.c
 )
 
-# find_package(PkgConfig REQUIRED)
-find_library(TURBOJPEG_LIB NAMES turbojpeg REQUIRED)
-find_path(TURBOJPEG_INCLUDE NAMES turbojpeg.h REQUIRED)
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(TURBOJPEG REQUIRED IMPORTED_TARGET libturbojpeg)
+# find_library(TURBOJPEG_LIB NAMES turbojpeg REQUIRED)
+# find_path(TURBOJPEG_INCLUDE NAMES turbojpeg.h REQUIRED)
 
 add_library(PROCESSOR STATIC ${LIB_SOURCES})
 
@@ -28,5 +29,11 @@ target_include_directories(PROCESSOR
         ${TURBOJPEG_INCLUDE}
 )
 
-target_link_libraries(PROCESSOR PUBLIC ${TURBOJPEG_LIB})
+# target_link_libraries(PROCESSOR PUBLIC ${TURBOJPEG_LIB})
+target_link_libraries(PROCESSOR PUBLIC PkgConfig::TURBOJPEG)
 set_target_properties(PROCESSOR PROPERTIES EXPORT_NAME PROCESSOR)
+
+if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
+        add_executable(image_processor src/main.c) # Assuming you have a main.c
+    target_link_libraries(image_processor PRIVATE PROCESSOR)
+endif()

flake.nix

@@ -0,0 +1,43 @@
+{
+  description = "Image Processor API";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+  }: let
+    supportedSystems = ["aarch64-darwin" "x86_64-darwin" "x86_64-linux"];
+    forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+    pkgsFor = system: import nixpkgs {inherit system;};
+  in {
+    # This allows other flakes to "consume" this library
+    packages = forAllSystems (system: let
+      pkgs = pkgsFor system;
+    in {
+      default = pkgs.stdenv.mkDerivation {
+        pname = "image_processor";
+        version = "0.1.0";
+        src = ./.;
+        nativeBuildInputs = [pkgs.cmake pkgs.pkg-config];
+        buildInputs = [pkgs.libjpeg_turbo];
+      };
+    });
+
+    # This provides the dev environment for the API itself
+    devShells = forAllSystems (system: let
+      pkgs = pkgsFor system;
+    in {
+      default = pkgs.mkShell {
+        nativeBuildInputs = [pkgs.cmake pkgs.pkg-config];
+        buildInputs = [pkgs.libjpeg_turbo];
+        shellHook = ''
+          export CPATH="${pkgs.libjpeg_turbo.dev}/include:$CPATH"
+          echo "⚙️ Image Processor API Dev Shell"
+        '';
+      };
+    });
+  };
+}

shell.nix

@@ -0,0 +1,14 @@
+{pkgs ? import <nixpkgs> {}}:
+pkgs.mkShell {
+  nativeBuildInputs = with pkgs; [
+    cmake
+    pkg-config
+  ];
+  buildInputs = with pkgs; [
+    libjpeg_turbo
+  ];
+  # This tells pkg-config where the Nix libraries are automatically
+  shellHook = ''
+    echo "Image Processor Dev Environment Loaded"
+  '';
+}

src/main.c

@@ -1,9 +1,8 @@
 #include <stdlib.h>
-#include <time.h>
-#include "utils.h"
-#include "filters.h"
+#include "image/utils.h"
+#include "image/filters.h"
 // #include "transformations.h"
-#include "imgio.h"
+#include "image/imgio.h"
 
 int
 main()