switch to nix2container for image building

.forgejo/workflows/docker.yaml

@@ -37,5 +37,4 @@ jobs:
       - name: Push image
         if: github.ref == 'refs/heads/main'
         run: |
-          skopeo copy --insecure-policy --dest-creds="${{ secrets.DOCKER_USERNAME }}:${{ secrets.DOCKER_PASSWORD }}" \
-            "docker-archive:$(nix build .#'"haze-image-php-${{ matrix.php-version }}"' --print-out-paths)" "docker://icewind1991/haze:${{ matrix.php-version }}"
+          nix run .#'"haze-image-php-${{ matrix.php-version }}"'.copyToRegistry -- --dest-creds="${{ secrets.DOCKER_USERNAME }}:${{ secrets.DOCKER_PASSWORD }}"

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "crane": {
       "locked": {
-        "lastModified": 1763938834,
-        "narHash": "sha256-j8iB0Yr4zAvQLueCZ5abxfk6fnG/SJ5JnGUziETjwfg=",
+        "lastModified": 1780099841,
+        "narHash": "sha256-EVZd2RsbpreRUDSi9rBwPY+ZxoyMaiEBbZxxhljbaS4=",
         "owner": "ipetkov",
         "repo": "crane",
-        "rev": "d9e753122e51cee64eb8d2dddfe11148f339f5a2",
+        "rev": "0532eb17955225173906d671fb36306bdeb1e2dc",
         "type": "github"
       },
       "original": {
@@ -38,11 +38,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1773062095,
-        "narHash": "sha256-u+cK9IoJokO4YzQwMc2s8Vti0RL/LVSrROOEn2opc5U=",
+        "lastModified": 1781543995,
+        "narHash": "sha256-wsSyxNWOSMofu4F5xGYGMrB1d8cepvBNhxhm9bGGmXg=",
         "owner": "nix-community",
         "repo": "flakelight",
-        "rev": "c99e4d5f40e578cb2d8f460ea2bbd5dc26316d24",
+        "rev": "fd1d557721e07b5a9d319442e4bcb5d286600011",
         "type": "github"
       },
       "original": {
@@ -60,11 +60,11 @@
         "rust-overlay": "rust-overlay"
       },
       "locked": {
-        "lastModified": 1772297202,
-        "narHash": "sha256-UEzHO/tCmhPhr8RpWtbm1MTa7ABobwt3nCjrcuDAPm0=",
+        "lastModified": 1780231986,
+        "narHash": "sha256-OyafczPtzE0Xa2zl3j/KvV2+ZVYGhYQHt0MOVWtDXlY=",
         "ref": "refs/heads/main",
-        "rev": "8690e1514863b934de12f2a503c9431d186ce30b",
-        "revCount": 68,
+        "rev": "f5cbda29b945df03256bf63c22fa4cd5fa429e67",
+        "revCount": 72,
         "type": "git",
         "url": "https://codeberg.org/icewind/mill-scale.git"
       },
@@ -73,28 +73,48 @@
         "url": "https://codeberg.org/icewind/mill-scale.git"
       }
     },
+    "nix2container": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1775487831,
+        "narHash": "sha256-2lguQpLPQaxpQCJjXhmEEAfabwsAhkP29Z7fgLzHARA=",
+        "owner": "nlewo",
+        "repo": "nix2container",
+        "rev": "76be9608a7f4d6c985d28b0e7be903ae2547df3e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nlewo",
+        "repo": "nix2container",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1772822230,
-        "narHash": "sha256-yf3iYLGbGVlIthlQIk5/4/EQDZNNEmuqKZkQssMljuw=",
+        "lastModified": 1781216227,
+        "narHash": "sha256-9mUW6gNwoN2SWc/l0fW4svPNOulXLl8ijqKyeSOGgJE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "71caefce12ba78d84fe618cf61644dce01cf3a96",
+        "rev": "a0374025a863d007d98e3297f6aa46cc3141c2f0",
         "type": "github"
       },
       "original": {
         "id": "nixpkgs",
-        "ref": "nixos-25.11",
+        "ref": "nixos-26.05",
         "type": "indirect"
       }
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1772173633,
-        "narHash": "sha256-MOH58F4AIbCkh6qlQcwMycyk5SWvsqnS/TCfnqDlpj4=",
+        "lastModified": 1781268102,
+        "narHash": "sha256-Zn5KTggEmUB3lXn/ccERNcBdddE6IaOFber9dWViWDg=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "c0f3d81a7ddbc2b1332be0d8481a672b4f6004d6",
+        "rev": "49a4bd0573c376468dd7996ddb6f9fa31d8c4d97",
         "type": "github"
       },
       "original": {
@@ -111,11 +131,11 @@
         "utils": "utils"
       },
       "locked": {
-        "lastModified": 1772365008,
-        "narHash": "sha256-/ynkWKeZ1dyRIUkQas0AB35semWAwCbTKXu+/q+8MGg=",
+        "lastModified": 1781456983,
+        "narHash": "sha256-z3SNuQpkSeIRTS6Y/Q5FgGAuGSY5+YJBXtqWPXw0f0k=",
         "owner": "fossar",
         "repo": "nix-phps",
-        "rev": "f47eb877bf1c219809e4357eec2fdab8e3263b7b",
+        "rev": "6458735dece7e48f27d52ac68eee2d2cfe55b79a",
         "type": "github"
       },
       "original": {
@@ -128,6 +148,7 @@
       "inputs": {
         "flakelight": "flakelight",
         "mill-scale": "mill-scale",
+        "nix2container": "nix2container",
         "nixpkgs": "nixpkgs",
         "phps": "phps"
       }
@@ -141,11 +162,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1764557621,
-        "narHash": "sha256-kX5PoY8hQZ80+amMQgOO9t8Tc1JZ70gYRnzaVD4AA+o=",
+        "lastModified": 1780197589,
+        "narHash": "sha256-FVCr2Ij/jKf59a4LW481eeOF6rJRreOBrVgW/aUBTrw=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "93316876c2229460a5d6f5f052766cc4cef538ce",
+        "rev": "21632e942d89bf1cce4e5a63d7e58a215a0cbfcc",
         "type": "github"
       },
       "original": {

flake.nix

@@ -1,6 +1,6 @@
 {
   inputs = {
-    nixpkgs.url = "nixpkgs/nixos-25.11";
+    nixpkgs.url = "nixpkgs/nixos-26.05";
     flakelight = {
       url = "github:nix-community/flakelight";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -12,8 +12,14 @@
     phps = {
       url = "github:fossar/nix-phps";
     };
+    nix2container = {
+      url = "github:nlewo/nix2container";
+      inputs.nixpkgs.follows = "nixpkgs";
     };
-  outputs = {
+  };
+  outputs =
+    {
+      nix2container,
       mill-scale,
       phps,
       ...
@@ -36,8 +42,17 @@
 
       withOverlays = [
         (import ./nix/overlay.nix)
-        (prev: final: {
+        (final: prev: {
           inherit (phps.packages.${prev.system}) php81 php80;
+          inherit (nix2container.packages.x86_64-linux) nix2container;
+          blackfire = prev.blackfire.overrideAttrs (
+            oldAttrs: finalAttrs: {
+              src = final.fetchurl {
+                url = "https://packages.blackfire.io/debian/pool/any/main/b/blackfire/blackfire_${finalAttrs.version}_amd64.deb";
+                sha256 = "sha256-1fswfZEElLyXWqvNW76BpKTpBomK9cglJtitZgcpxhM=";
+              };
+            }
+          );
         })
       ];
 
@@ -50,16 +65,24 @@
         "haze-image-php-8.0" = pkgs: pkgs.haze-image-php-80;
       };
 
-      tools = pkgs: with pkgs; [cargo-edit bacon skopeo];
+      tools =
+        pkgs: with pkgs; [
+          cargo-edit
+          bacon
+          skopeo
+          dive
+        ];
 
       homeModules = {
-        default = {
+        default =
+          {
             pkgs,
             config,
             lib,
             ...
-        }: {
-          imports = [./nix/hm-module.nix];
+          }:
+          {
+            imports = [ ./nix/hm-module.nix ];
             config = lib.mkIf config.programs.haze.enable {
               programs.haze.package = lib.mkDefault pkgs.haze;
             };

nix/image/haze.nix

@@ -36,14 +36,24 @@
   dnsmasq,
   frankenphp,
   nushell,
-}: let
+  nix2container,
+  buildEnv,
+}:
+let
   inherit (builtins) toString compareVersions;
-  inherit (lib) readFile getExe concatStringsSep splitString take optionals;
+  inherit (lib)
+    readFile
+    getExe
+    concatStringsSep
+    splitString
+    take
+    optionals
+    ;
 
   version = (fromTOML (readFile ../../Cargo.toml)).package.version;
 
   phpVersion = concatStringsSep "." (take 2 (splitString "." php.version));
-  phpEnv = callPackage ./php.nix {inherit debug php;};
+  phpEnv = callPackage ./php.nix { inherit debug php; };
 
   bootstrap = writers.writeNuBin "bootstrap" (readFile ./bootstrap);
   shadowSetupScript = writeShellApplication {
@@ -51,7 +61,7 @@
     text = dockerTools.shadowSetup;
   };
 
-  tmpDir = runCommand "tmp-dir" {} ''
+  baseDirs = runCommand "tmp-dir" { } ''
     mkdir -p $out/tmp
     mkdir -p $out/var/cache/nginx
     mkdir -p $out/var/log/nginx
@@ -63,9 +73,10 @@
     mkdir -p $out/conf
     mkdir -p $out/var/spool
   '';
-  configs = callPackage ./configs.nix {};
-  scripts = callPackage ./scripts.nix {};
-  phpunitUnwrapped = majorVersion:
+  configs = callPackage ./configs.nix { };
+  scripts = callPackage ./scripts.nix { };
+  phpunitUnwrapped =
+    majorVersion:
     callPackage ./phpunit.nix {
       inherit majorVersion;
       php = phpEnv;
@@ -73,7 +84,7 @@
 
   phpunit = writeShellApplication {
     name = "phpunit";
-    runtimeInputs = [jq];
+    runtimeInputs = [ jq ];
     text = ''
       MAJOR=$(jq -r 'first(.require."phpunit/phpunit" | scan("[[:digit:]]+"))' vendor-bin/phpunit/composer.json)
       case "$MAJOR" in
@@ -97,22 +108,18 @@
     '';
   };
 
-  certificates = runCommand "scripts" {} ''
+  certificates = runCommand "scripts" { } ''
     mkdir -p $out
     cp -r ${../../certificates} $out/certificates
   '';
-  clamav-data = runCommand "scripts" {} ''
+  clamav-data = runCommand "scripts" { } ''
     mkdir -p $out/etc
     mkdir -p $out/var/lib/clamav
     cp ${data/clamav/daily.cvd} $out/var/lib/clamav/daily.cvd
     cp -r ${configs/clamav} $out/etc/clamav
   '';
 
-  baseImage = dockerTools.buildImage {
-    name = "icewind1991/haze-base";
-    tag = phpVersion;
-
-    copyToRoot = [
+  basePackages = [
     dockerTools.caCertificates
     dockerTools.usrBinEnv
     bash
@@ -142,55 +149,93 @@
     dnsmasq
     nushell
     getent
+    clamav-data
   ];
-  };
 
-  phpImage = dockerTools.buildImage {
-    name = "icewind1991/haze-php";
-    tag = phpVersion;
-    fromImage = baseImage;
-
-    copyToRoot =
-      [
+  phpPackages = [
     phpEnv
     phpEnv.packages.composer
     phpunit
   ]
   ++ optionals ((compareVersions phpVersion "8.2") == 1) [
     (frankenphp.override {
-          php = php.withExtensions (import ./php-ext.nix {
+      php = php.withExtensions (
+        import ./php-ext.nix {
           inherit lib php;
           enableBlackfire = false;
-          });
+        }
+      );
     })
   ];
-  };
+
+  # https://blog.eigenvalue.net/2023-nix2container-everything-once/
+  foldImageLayers =
+    let
+      mergeToLayer =
+        priorLayers: component:
+        assert builtins.isList priorLayers;
+        assert builtins.isAttrs component;
+        let
+          layer = nix2container.buildLayer (
+            component
+            // {
+              layers = priorLayers;
+            }
+          );
+        in
+        priorLayers ++ [ layer ];
+    in
+    layers: lib.foldl mergeToLayer [ ] layers;
 in
-  dockerTools.buildLayeredImage {
+nix2container.buildImage {
   name = "icewind1991/haze";
   tag = phpVersion;
-    maxLayers = 5;
-    fromImage = phpImage;
-    contents = [
-      tmpDir
+  layers = foldImageLayers [
+    {
+      copyToRoot = buildEnv {
+        name = "base";
+        paths = basePackages;
+        pathsToLink = [
+          "/bin"
+          "/sbin"
+          "/etc"
+          "/usr"
+          "/conf"
+        ];
+      };
+    }
+    {
+      copyToRoot = buildEnv {
+        name = "php";
+        paths = phpPackages;
+        pathsToLink = [ "/bin" ];
+      };
+    }
+    {
+      copyToRoot = [
+        baseDirs
         bootstrap
         configs
         scripts
         certificates
-      clamav-data
         shadowSetupScript
       ];
-    fakeRootCommands = ''
-      chmod 1777 tmp
-      chmod 1777 var/tmp
-      chmod 1777 var/run
-      chmod 1777 var/log/nginx
-      chmod 1777 var/cache/nginx
-      chmod 1777 var/spool
-      chmod -R 0755 etc/nc
-    '';
+      perms = [
+        {
+          path = baseDirs;
+          regex = "/tmp|var/(tmp|run|log/nginx|cache/nginx|spool)";
+          mode = "0777";
+        }
+        {
+          path = baseDirs;
+          regex = "/etc/nc";
+          mode = "0755";
+        }
+      ];
+    }
+  ];
   config = {
-      Cmd = [(getExe bootstrap)];
+    Cmd = [ (getExe bootstrap) ];
     Env = [
       "EDITOR=hx"
       "WEBROOT=/var/www/html"
@@ -201,4 +246,4 @@ in
       "nl.icewind.haze.version" = toString version;
     };
   };
-  }
+}