chore: drop nix and migrate to container-based development

.fvmrc

@@ -1,3 +1,3 @@
 {
   "flutter": "3.44.0"
-}
+}

.pre-commit-config.yaml

@@ -26,13 +26,13 @@ repos:
       - id: forbidden-files-hook
         name: check for forbidden home-directory files
         language: system
-        entry: bash -c 'cd "$(git rev-parse --show-toplevel)" && nix develop --command task check-hygiene'
+        entry: bash -c 'cd "$(git rev-parse --show-toplevel)" && task check-hygiene'
         pass_filenames: false
         always_run: true
       - id: dart-check
         name: dart format (autofix) + check-fast (parallel)
         language: system
-        entry: bash -c 'cd "$(git rev-parse --show-toplevel)" && nix develop --command dagger call --progress=plain -q -m ci --source=. check-fast'
+        entry: bash -c 'cd "$(git rev-parse --show-toplevel)" && dagger call --progress=plain -q -m ci --source=. check-fast'
         pass_filenames: false
         always_run: true
       - id: ci-no-direct-dagger
@@ -50,12 +50,12 @@ repos:
       - id: ci-image-exists
         name: verify container images in ci/main.go are reachable
         language: system
-        entry: bash -c 'cd "$(git rev-parse --show-toplevel)" && nix develop --command task check-ci-images'
+        entry: bash -c 'cd "$(git rev-parse --show-toplevel)" && task check-ci-images'
         pass_filenames: false
         files: ^(ci/main\.go|\.fvmrc)$
       - id: dagger-versions-aligned
-        name: verify Dagger version is consistent across dagger.json, flake.nix, Dockerfile and DAGGER.md
+        name: verify Dagger version is consistent across dagger.json, Dockerfile and DAGGER.md
         language: system
         entry: bash -c 'cd "$(git rev-parse --show-toplevel)" && scripts/check_dagger_versions.sh'
         pass_filenames: false
-        files: ^(ci/dagger\.json|flake\.nix|\.forgejo/Dockerfile|DAGGER\.md)$
+        files: ^(ci/dagger\.json|\.forgejo/Dockerfile|DAGGER\.md)$

Dockerfile.dev

@@ -0,0 +1,59 @@
+# Development and Testing Container for SharedInbox
+# Replaces the Nix shell environment.
+FROM ghcr.io/cirruslabs/flutter:3.44.0
+
+# Install Linux desktop build and test dependencies, Go, NodeJS, python3, and utilities
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    clang \
+    cmake \
+    ninja-build \
+    pkg-config \
+    libgtk-3-dev \
+    liblzma-dev \
+    libsecret-1-dev \
+    libgcrypt20-dev \
+    libjsoncpp-dev \
+    sqlite3 \
+    iproute2 \
+    netcat-openbsd \
+    xvfb \
+    libosmesa6 \
+    libegl1 \
+    lld \
+    git \
+    curl \
+    jq \
+    python3-pip \
+    nodejs \
+    npm \
+    hugo \
+    lcov \
+    rsync \
+    openssh-client \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Task runner
+RUN curl -fsSL https://taskfile.dev/install.sh \
+    | sh -s -- -b /usr/local/bin v3.48.0
+
+# Install Dagger CLI
+RUN curl -fsSL https://dl.dagger.io/dagger/install.sh \
+    | DAGGER_VERSION=0.20.8 BIN_DIR=/usr/local/bin sh
+
+# Install python packages (Play Store API clients + pre-commit)
+RUN pip install --break-system-packages --no-cache-dir \
+    google-api-python-client \
+    google-auth-httplib2 \
+    httplib2 \
+    pre-commit==4.5.1
+
+# Install acpx CLI globally
+RUN npm install -g acpx@0.10.0
+
+# Setup user "ci"
+RUN useradd -m -s /bin/bash ci
+USER ci
+ENV HOME=/home/ci
+ENV PATH=/home/ci/.pub-cache/bin:$PATH
+
+WORKDIR /src

flake.lock

@@ -1,82 +0,0 @@
-{
-  "nodes": {
-    "dagger": {
-      "inputs": {
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1778107833,
-        "narHash": "sha256-q5XQep2mpgTPiWwuYB1+L2dsFeACT6sHx8J939iM+HE=",
-        "owner": "dagger",
-        "repo": "nix",
-        "rev": "873cc22ba46b73d4a6c1aa6c102ef3aabc736496",
-        "type": "github"
-      },
-      "original": {
-        "owner": "dagger",
-        "repo": "nix",
-        "type": "github"
-      }
-    },
-    "flake-utils": {
-      "inputs": {
-        "systems": "systems"
-      },
-      "locked": {
-        "lastModified": 1731533236,
-        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "nixpkgs": {
-      "locked": {
-        "lastModified": 1778737229,
-        "narHash": "sha256-6xWoytx8jFW4PF1GjRm/i/53trbpKGfz6zjzQGBr4cI=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "d7a713c0b7e47c908258e71cba7a2d77cc8d71d5",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-25.11",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "root": {
-      "inputs": {
-        "dagger": "dagger",
-        "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs"
-      }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
-    }
-  },
-  "root": "root",
-  "version": 7
-}

flake.nix

@@ -1,166 +0,0 @@
-{
-  description = "SharedInbox — IMAP/SMTP Flutter client";
-
-  inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
-    flake-utils.url = "github:numtide/flake-utils";
-    dagger.url = "github:dagger/nix";
-    dagger.inputs.nixpkgs.follows = "nixpkgs";
-  };
-
-  outputs = { self, nixpkgs, flake-utils, dagger }:
-    flake-utils.lib.eachDefaultSystem (system:
-      let
-        pkgs = nixpkgs.legacyPackages.${system};
-
-        # All Linux desktop runtime libraries needed by flutter build linux and
-        # the UI integration tests (xvfb-run).  Kept as a list so we can reuse
-        # it for both buildInputs and LD_LIBRARY_PATH / PKG_CONFIG_PATH.
-        linuxDesktopLibs = with pkgs; [
-          gtk3
-          libsecret
-          fontconfig
-          libepoxy
-          mesa
-          libGL        # libglvnd — vendor-neutral GL/EGL/GLX dispatch layer
-          at-spi2-core
-          glib
-          pango
-          cairo
-          gdk-pixbuf
-          harfbuzz
-        # Dagger remote setup dependencies
-        stunnel
-        netcat
-        ];
-
-        fgj = pkgs.stdenv.mkDerivation {
-          pname = "fgj";
-          version = "0.4.0";
-          src = pkgs.fetchurl {
-            url = "https://codeberg.org/romaintb/fgj/releases/download/v0.4.0/fgj_linux_amd64";
-            sha256 = "07pia03facvvxq9i1dgl7p47ccv1iqj4drpkp45gvw26d4afkbj7";
-          };
-          dontUnpack = true;
-          installPhase = ''
-            mkdir -p $out/bin
-            cp $src $out/bin/fgj
-            chmod +x $out/bin/fgj
-          '';
-        };
-
-        # The dagger/nix flake's Nix wrapper is a broken self-exec loop, so we
-        # fetch the CLI binary directly.  Keep this version in lockstep with
-        # ci/dagger.json (engineVersion) and .forgejo/Dockerfile (DAGGER_VERSION) —
-        # scripts/check_dagger_versions.sh enforces this.
-        daggerCli = pkgs.stdenv.mkDerivation {
-          pname = "dagger";
-          version = "0.20.8";
-          src = pkgs.fetchurl {
-            url = "https://dl.dagger.io/dagger/releases/0.20.8/dagger_v0.20.8_linux_amd64.tar.gz";
-            sha256 = "1ns6wq2z1skd2fq9lbrcali0s8kn24p3haamnjjgchg6zlv6b960";
-          };
-          sourceRoot = ".";
-          installPhase = ''
-            mkdir -p $out/bin
-            cp dagger $out/bin/dagger
-            chmod +x $out/bin/dagger
-          '';
-        };
-      in {
-        devShells.default = pkgs.mkShell {
-          buildInputs = with pkgs; [
-            # Dagger CLI
-            daggerCli
-
-            # Go compiler — for Dagger development
-            go
-
-            # Java JDK — required by Gradle for Android builds
-
-            # Task runner
-            go-task
-
-            # Flutter version manager — needed for host builds (task build-linux, task run)
-            fvm
-
-            # Git hooks
-            pre-commit
-
-            # Linux desktop build + runtime dependencies (flutter build linux / task run)
-          ] ++ linuxDesktopLibs ++ (with pkgs; [
-            pkg-config
-            clang
-            cmake
-            ninja
-
-            # Local IMAP/SMTP dev server for integration tests
-            stalwart-mail
-
-            # Headless display for UI integration tests
-            xvfb-run          # wraps Xvfb; xvfb-run --auto-servernum ...
-
-            # Coverage merging (flutter test --merge-coverage requires lcov)
-            lcov
-
-            # Website
-            hugo
-
-            # Utilities
-            git
-            curl
-            jq
-            sqlite
-            # python3 base + Google Play API client (for scripts/deploy_playstore.py)
-            (python3.withPackages (ps: with ps; [
-              google-api-python-client
-              google-auth-httplib2
-              httplib2
-            ]))  # used by stalwart-dev/start and deploy_playstore.py
-            fgj      # Codeberg/Forgejo CLI (like gh for GitHub)
-            skopeo   # inspect OCI image manifests without pulling layers (used by check-ci-images)
-            librsvg  # rsvg-convert — SVG→PNG for generate-icons task
-          ]);
-
-          shellHook = ''
-            # nix develop --command does not set IN_NIX_SHELL; set it so _preflight passes in CI
-            export IN_NIX_SHELL=1
-
-            # Point Dagger client at the running engine socket
-            export DAGGER_HOST=unix:///run/dagger/engine.sock
-
-            # Disable Flutter telemetry inside dev shell
-            export FLUTTER_SUPPRESS_ANALYTICS=true
-
-            # Expose dev headers to cmake's FindPkgConfig.
-            # The nix pkg-config wrapper works in bash but cmake invokes pkg-config
-            # as a subprocess and needs PKG_CONFIG_PATH set explicitly.
-            export PKG_CONFIG_PATH="${pkgs.gtk3.dev}/lib/pkgconfig:${pkgs.glib.dev}/lib/pkgconfig:${pkgs.pango.dev}/lib/pkgconfig:${pkgs.cairo.dev}/lib/pkgconfig:${pkgs.gdk-pixbuf.dev}/lib/pkgconfig:${pkgs.at-spi2-core.dev}/lib/pkgconfig:${pkgs.harfbuzz.dev}/lib/pkgconfig:${pkgs.libsecret}/lib/pkgconfig:${pkgs.fontconfig.dev}/lib/pkgconfig:${pkgs.libepoxy}/lib/pkgconfig:$PKG_CONFIG_PATH"
-
-            # Nix ld uses --no-copy-dt-needed-entries (strict mode): transitive shared-lib
-            # deps are not followed automatically, so link them explicitly.
-            export LDFLAGS="-L${pkgs.fontconfig.lib}/lib -lfontconfig $LDFLAGS"
-
-            # Make nix-built runtime libs visible to the dynamic linker so the
-            # Flutter Linux bundle and integration-ui tests can run.
-            export LD_LIBRARY_PATH="${pkgs.lib.makeLibraryPath linuxDesktopLibs}:$LD_LIBRARY_PATH"
-
-            # Wire the libglvnd dispatch to the nix mesa vendor ICDs so GTK/Flutter
-            # can create an OpenGL (EGL + GLX) context under Xvfb without a real GPU.
-            export __EGL_VENDOR_LIBRARY_DIRS="${pkgs.mesa}/share/glvnd/egl_vendor.d"
-            export __GLX_VENDOR_LIBRARY_DIRS="${pkgs.mesa}/lib"
-            export LIBGL_ALWAYS_SOFTWARE=1
-            export MESA_LOADER_DRIVER_OVERRIDE=softpipe
-
-            echo "SharedInbox Flutter dev environment ready."
-            echo "  Analyze        : task analyze"
-            echo "  Unit tests     : task test"
-            echo "  Integration    : task integration"
-            echo "  All checks     : task check"
-            echo "  Run (Linux)    : task run"
-            echo "  Start Stalwart : stalwart-dev/start"
-          '';
-        };
-      }
-    );
-}

scripts/check_dagger_versions.sh

@@ -13,11 +13,6 @@ ROOT=$(git rev-parse --show-toplevel)
 dagger_json=$(grep -oE '"engineVersion"[[:space:]]*:[[:space:]]*"[^"]+"' "$ROOT/ci/dagger.json" \
   | sed -E 's/.*"v?([^"]+)"$/\1/')
 
-# flake.nix — the dagger021 derivation's CLI download URL.
-flake_nix=$(grep -oE 'dagger_v[0-9]+\.[0-9]+\.[0-9]+_linux' "$ROOT/flake.nix" \
-  | head -n1 \
-  | sed -E 's/dagger_v([0-9.]+)_linux/\1/')
-
 # .forgejo/Dockerfile — DAGGER_VERSION env on the install line.
 dockerfile=$(grep -oE 'DAGGER_VERSION=[0-9]+\.[0-9]+\.[0-9]+' "$ROOT/.forgejo/Dockerfile" \
   | head -n1 \
@@ -29,11 +24,10 @@ dagger_md=$(grep -oE 'dagger/nix/v[0-9]+\.[0-9]+\.[0-9]+' "$ROOT/DAGGER.md" \
   | sed -E 's@.*/v@@')
 
 printf 'ci/dagger.json    engineVersion = v%s\n' "$dagger_json"
-printf 'flake.nix         dagger021     = %s\n'  "$flake_nix"
 printf '.forgejo/Dockerf. DAGGER_VERSION= %s\n'  "$dockerfile"
 printf 'DAGGER.md         engine tag    = v%s\n' "$dagger_md"
 
-for v in "$flake_nix" "$dockerfile" "$dagger_md"; do
+for v in "$dockerfile" "$dagger_md"; do
   if [ -z "$v" ]; then
     echo "ERROR: failed to parse a Dagger version reference." >&2
     exit 1
@@ -41,7 +35,7 @@ for v in "$flake_nix" "$dockerfile" "$dagger_md"; do
   if [ "$v" != "$dagger_json" ]; then
     echo "" >&2
     echo "ERROR: Dagger versions are out of sync." >&2
-    echo "  Align ci/dagger.json, flake.nix, .forgejo/Dockerfile and DAGGER.md to the same version." >&2
+    echo "  Align ci/dagger.json, .forgejo/Dockerfile and DAGGER.md to the same version." >&2
     exit 1
   fi
 done