build: Makefile wrappers for macOS/Linux/Windows/Android/iOS, bootstrap, opt-in Xcode download, BOM check and docs

.envrc

@@ -0,0 +1 @@
+use flake

.github/workflows/make-build.yaml

@@ -0,0 +1,107 @@
+name: Make build
+
+# Builds with the Makefile targets on the hosted runners. Manual only.
+on:
+  workflow_dispatch:
+
+jobs:
+  windows:
+    runs-on: windows-2022
+    defaults:
+      run:
+        shell: bash
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+      - uses: subosito/flutter-action@v2
+        with:
+          flutter-version: '3.47.2'
+          channel: 'stable'
+      - uses: actions/setup-go@v6
+        with:
+          go-version: '1.24.13'
+      - name: Install make
+        run: command -v make >/dev/null 2>&1 || choco install make -y --no-progress
+      - name: Build
+        run: make build-windows VERSION=0.0.0 BUILD_NUM=${{ github.run_number }} WINDOWS_COPY_ASSETS=1
+
+  macos:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+      - uses: subosito/flutter-action@v2
+        with:
+          flutter-version: '3.47.2'
+          channel: 'stable'
+      - uses: actions/setup-go@v6
+        with:
+          go-version: '1.24.13'
+      - name: Tools
+        run: |
+          brew install meson ninja autoconf automake libtool protobuf pkg-config cbindgen || true
+          rustup toolchain install 1.99.1 --profile minimal || true
+          rustup default 1.99.1 || true
+      - name: Build
+        run: make build-macos VERSION=0.0.0 BUILD_NUM=${{ github.run_number }}
+
+  linux:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+      - uses: subosito/flutter-action@v2
+        with:
+          flutter-version: '3.47.2'
+          channel: 'stable'
+      - uses: actions/setup-go@v6
+        with:
+          go-version: '1.24.13'
+      - name: Free disk space
+        run: |
+          sudo rm -rf /usr/share/dotnet /usr/local/lib/android /opt/ghc /opt/hostedtoolcache/CodeQL
+          df -h /
+      - name: Install build dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends \
+            automake build-essential clang cmake libclang-dev libtool llvm meson ninja-build patchelf pkg-config protobuf-compiler rsync \
+            libgcrypt20-dev libgirepository1.0-dev libgit2-dev libglib2.0-dev libgtk-3-dev libjsoncpp-dev liblzma-dev \
+            libncurses5-dev libncursesw5-dev libopencv-dev libsecret-1-dev libssl-dev libtss2-dev \
+            ocl-icd-opencl-dev opencl-headers valac zlib1g-dev
+      - name: Rust
+        run: |
+          rustup toolchain install 1.99.1 --profile minimal
+          rustup default 1.99.1
+      - name: Check the toolchain bill of materials
+        run: make verify-bom
+      - name: Build
+        run: make build-linux VERSION=0.0.0 BUILD_NUM=${{ github.run_number }}
+
+  ios:
+    # The fork has a single hosted macOS concurrency slot. Running macOS and
+    # iOS together leaves one job queued until GitHub cancels it; serialise them.
+    needs: macos
+    if: always()
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+      - uses: subosito/flutter-action@v2
+        with:
+          flutter-version: '3.47.2'
+          channel: 'stable'
+      - uses: actions/setup-go@v6
+        with:
+          go-version: '1.24.13'
+      - name: Tools
+        run: |
+          brew install meson ninja autoconf automake libtool protobuf pkg-config cbindgen || true
+          rustup toolchain install 1.99.1 --profile minimal || true
+          rustup default 1.99.1 || true
+      - name: Build
+        run: make build-ios VERSION=0.0.0 BUILD_NUM=${{ github.run_number }}

.gitignore

@@ -4,6 +4,7 @@
 *.pyc
 *.swp
 .DS_Store
+._*
 .atom/
 .buildlog/
 .history
@@ -35,9 +36,13 @@ Microsoft.Windows*
 android/app/.cxx
 android/build/
 
+# Nix / direnv / project-local toolchain state
+.direnv/
+
 # Web related
 lib/generated_plugin_registrant.dart
 
+
 # testing data
 test/services/coins/bitcoin/bitcoin_wallet_test_parameters.dart
 test/services/coins/firo/firo_wallet_test_parameters.dart
@@ -120,3 +125,12 @@ lib/wl_gen/generated/
 
 /assets/windows/mwebd.exe
 /tool/build
+bm/results/
+/.cargo/config.toml
+/scripts/linux/pc/
+
+# Nix dev shell: generated wrappers
+.nix-bin/
+.direnv/
+/android/key.properties
+/android/dev-keystore.jks