add flake

.devcontainer/devcontainer.json

@@ -0,0 +1,16 @@
+{
+	"name": "Alpine",
+	"image": "mcr.microsoft.com/devcontainers/base:alpine-3.20",
+	"postCreateCommand": "sudo apk add nix nix-dev nix-doc nix-manual nix-bash-completion && sudo chown -R vscode:vscode /nix && mkdir -p ~/.config/nix && echo 'experimental-features = nix-command flakes\n sandbox = false' > ~/.config/nix/nix.conf",
+	"customizations": {
+		"vscode": {
+			"extensions": [
+				"bbenoist.Nix"
+			]
+		}
+	},
+	"runArgs": [
+		"--userns=keep-id"
+	],
+	"containerUser": "vscode"
+}

flake.nix

@@ -0,0 +1,89 @@
+{
+  description = "A  flake for build root";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let pkgs = nixpkgs.legacyPackages.${system}; in
+      {
+        packages = rec {
+          buildroot = pkgs.stdenv.mkDerivation rec {
+            name = "buildroot";
+            version = "2024.02.3";
+            src = pkgs.fetchzip {
+              url = "https://buildroot.org/downloads/buildroot-${version}.tar.gz";
+              sha256 = "sha256-iG/6UHy0tz0YAUlkY93yH9NbVLaggBSJDBInWCw8S18=";
+            };
+            phases = [ "unpackPhase" "installPhase" ];
+            installPhase = ''
+              mkdir -p $out
+              cp -R . $out
+            '';
+          };
+          buildrootMakeCommand = pkgs.writeShellApplication {
+            name = "buildrootMakeCommand";
+
+            runtimeInputs = [
+              pkgs.gnumake
+              pkgs.which
+              pkgs.pkg-config
+              pkgs.ncurses.dev
+              pkgs.rsync
+              pkgs.bc
+              pkgs.unzip
+              pkgs.cpio
+              pkgs.wget
+              pkgs.git
+              pkgs.subversion
+              pkgs.gnused
+              pkgs.perl
+              pkgs.flock
+              pkgs.bash
+              pkgs.gnugrep
+              pkgs.coreutils-full
+              pkgs.binutils
+              pkgs.gcc
+              pkgs.gnupatch
+              pkgs.gzip
+              pkgs.bzip2
+              pkgs.gnutar
+              pkgs.cacert
+              pkgs.python3Full
+              pkgs.lzma
+              pkgs.gdbm
+              pkgs.readline
+            ];
+
+            text = ''
+              mkdir -p "$PWD/.buildroot"
+              BR2_DL_DIR="$PWD/.buildroot/dl" ${pkgs.gnumake}/bin/make O="$PWD/.buildroot" -C "${buildroot}" "$@"
+            '';
+          };
+          buildrootFHSEnv = (pkgs.buildFHSEnv {
+            name = "buildrootFHSEnv";
+            targetPkgs = pkgs: ([
+              pkgs.file
+            ]);
+            runScript = "${buildrootMakeCommand}/bin/buildrootMakeCommand";
+          });
+          default = buildrootFHSEnv;
+        };
+        apps = rec {
+          buildrootMakeCommand = flake-utils.lib.mkApp { drv = self.packages.${system}.buildrootMakeCommand; };
+          buildrootFHSEnv = flake-utils.lib.mkApp { drv = self.packages.${system}.buildrootFHSEnv; };
+          default = buildrootFHSEnv;
+        };
+        devShells = {
+          default = pkgs.mkShell {
+            buildInputs = [
+              pkgs.nixpkgs-fmt
+            ];
+          };
+        };
+      }
+    );
+}