Auto setup

.github/workflows/build_example.yaml

@@ -0,0 +1,101 @@
+name: build examples
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  build-windows:
+    name: build-windows
+    runs-on: windows-latest
+
+    steps:
+      - uses: subosito/flutter-action@v2
+        with:
+          # flutter-version: '3.16.9'
+          channel: "stable"
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '11'
+      - name: build
+        run: |
+          cd example
+          flutter build windows
+          flutter build apk --release --target-platform android-arm64,android-arm,android-x64 --split-per-abi
+  build-ubuntu:
+    name: build-ubuntu
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: subosito/flutter-action@v2
+        with:
+          # flutter-version: '3.16.9'
+          channel: "stable"
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '11'
+      - name: setup
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y curl git wget python3 unzip build-essential \
+            libgtk-3-dev ffmpeg libavcodec-dev \
+            cmake ninja-build nasm libavformat-dev libavutil-dev \
+            libswscale-dev libgflags-dev \
+            libjpeg-dev libpng-dev libtiff-dev python3-pip
+      - name: build
+        run: |
+          cd example
+          flutter build linux
+          flutter build apk --release --target-platform android-arm64,android-arm,android-x64 --split-per-abi
+  build-macos:
+    name: build-macos
+    runs-on: macos-13
+    steps:
+      - uses: subosito/flutter-action@v2
+        with:
+          # flutter-version: '3.16.9'
+          channel: "stable"
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '11'
+      - name: build
+        run: |
+          cd example
+          flutter build macos
+          flutter build apk --release --target-platform android-arm64,android-arm,android-x64 --split-per-abi
+          flutter build ios --release --no-codesign
+  build-macos-arm:
+    name: build-macos-arm
+    runs-on: macos-14
+    steps:
+      - uses: subosito/flutter-action@v2
+        with:
+          # flutter-version: '3.16.9'
+          channel: "stable"
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '11'
+      - name: build
+        run: |
+          cd example
+          flutter build macos
+          flutter build apk --release --target-platform android-arm64,android-arm,android-x64 --split-per-abi
+          flutter build ios --release --no-codesign

README.md

@@ -12,7 +12,18 @@ OpenCV Bindings for Dart Language.
 </p>
 
 > [!IMPORTANT]
-> Please use v0.3.0 and later version, usage:
+> Please use `v0.3.0` and later version
+>
+> For `v1.0.5` and later, setup is no longer needed, the prebuilt libs will be downloaded from releases
+> automatically, some notes:
+>
+> 1. iOS: default target architecture is `arm64`, if you need to run on `x64`(ios simulator), please
+> set `OPENCV_DART_ARCH` to `x64`, e.g., `export OPENCV_DART_ARCH=x64`
+> 2. Android: all supported ABIs (`x86_64` `arm64-v8a` `armeabi-v7a`) will be downloaded, if you want
+> to reduce the app size, please add `--split-per-abi` to the `flutter build` command, e.g., `flutter build apk --release --target-platform android-arm64,android-x64 --split-per-abi`, otherwise, all `.so` will
+> be packaged to app.
+>
+> For `v1.0.4` and below, make sure run the following setup commands before running your app:
 >
 > 1. `flutter pub add opencv_dart` or `dart pub add opencv_dart`
 > 2. `dart run opencv_dart:setup <platform> --arch <arch>`
@@ -148,7 +159,7 @@ void main() {
 
 #### Flutter
 
-see [example](https://github.com/rainyl/opencv_dart/tree/native-assets/example)
+see [example](https://github.com/rainyl/opencv_dart/tree/main/example)
 
 More examples are on the way...
 

android/build.gradle

@@ -1,5 +1,3 @@
-// The Android Gradle Plugin builds the native code with the Android NDK.
-
 group 'dev.rainyl.opencv_dart'
 version '1.0'
 
@@ -33,9 +31,8 @@ android {
     // to bump the version in their app.
     compileSdk 33
 
-    // Use the NDK version
-    // declared in /android/app/build.gradle file of the Flutter project.
-    // Replace it with a version number if this plugin requires a specfic NDK version.
+    // Use the NDK version declared in /android/app/build.gradle file of the Flutter project.
+    // Replace it with a version number if this plugin requires a specific NDK version.
     // (e.g. ndkVersion "23.1.7779620")
     ndkVersion android.ndkVersion
 
@@ -63,3 +60,40 @@ android {
         minSdkVersion 19
     }
 }
+
+// 'dart' and 'dart.bat' both exists on windwos, the former is a bash script and won't work
+// correctly on windows, so use `dart.bat`
+def dartCmd = "dart"
+def currentOS = org.gradle.nativeplatform.platform.internal.DefaultNativePlatform.currentOperatingSystem
+if(currentOS.isWindows()){
+  dartCmd = "dart.bat"
+}
+
+task runOpenCVSetup(type: Exec) {
+    // Set working directory to the parent directory of the root directory
+    workingDir rootDir.parentFile
+    commandLine dartCmd, 'run', 'opencv_dart:setup', 'android', '--arch', 'x86_64'
+    doFirst {
+        println "Running OpenCV setup for x86_64 in ${workingDir}"
+    }
+}
+
+task runOpenCVSetupArm64(type: Exec) {
+    // Set working directory to the parent directory of the root directory
+    workingDir rootDir.parentFile
+    commandLine dartCmd, 'run', 'opencv_dart:setup', 'android', '--arch', 'arm64-v8a'
+    doFirst {
+        println "Running OpenCV setup for arm64-v8a in ${workingDir}"
+    }
+}
+
+task runOpenCVSetupArmeabi(type: Exec) {
+    // Set working directory to the parent directory of the root directory
+    workingDir rootDir.parentFile
+    commandLine dartCmd, 'run', 'opencv_dart:setup', 'android', '--arch', 'armeabi-v7a'
+    doFirst {
+        println "Running OpenCV setup for armeabi-v7a in ${workingDir}"
+    }
+}
+
+preBuild.dependsOn runOpenCVSetup, runOpenCVSetupArm64, runOpenCVSetupArmeabi

bin/setup_commands.dart

@@ -106,6 +106,18 @@ abstract class BaseSetupCommand extends Command {
     if (!Directory(extractPath).existsSync()) {
       Directory(extractPath).createSync(recursive: true);
     }
+    // Check if libs already existed, avoid double-extract
+    if (Directory(extractPath)
+        .listSync()
+        .map((e) =>
+            e.path.endsWith(".so") ||
+            e.path.endsWith(".dll") ||
+            e.path.endsWith(".dylib") ||
+            e.path.endsWith(".framework"))
+        .any((e) => e)) {
+      print("Libs already exists in $extractPath, Skipping...");
+      return;
+    }
     print("Extracting to $extractPath");
     final tarBytes = GZipDecoder().decodeBytes(saveFile.readAsBytesSync());
     final archive = TarDecoder().decodeBytes(tarBytes);

example/ios/Flutter/Debug.xcconfig

@@ -1 +1,2 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "Generated.xcconfig"

example/ios/Flutter/Release.xcconfig

@@ -1 +1,2 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "Generated.xcconfig"

example/ios/Podfile

@@ -0,0 +1,44 @@
+# Uncomment this line to define a global platform for your project
+# platform :ios, '12.0'
+
+# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
+ENV['COCOAPODS_DISABLE_STATS'] = 'true'
+
+project 'Runner', {
+  'Debug' => :debug,
+  'Profile' => :release,
+  'Release' => :release,
+}
+
+def flutter_root
+  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
+  unless File.exist?(generated_xcode_build_settings_path)
+    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
+  end
+
+  File.foreach(generated_xcode_build_settings_path) do |line|
+    matches = line.match(/FLUTTER_ROOT\=(.*)/)
+    return matches[1].strip if matches
+  end
+  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
+end
+
+require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
+
+flutter_ios_podfile_setup
+
+target 'Runner' do
+  use_frameworks!
+  use_modular_headers!
+
+  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
+  target 'RunnerTests' do
+    inherit! :search_paths
+  end
+end
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    flutter_additional_ios_build_settings(target)
+  end
+end

example/ios/Podfile.lock

@@ -0,0 +1,28 @@
+PODS:
+  - Flutter (1.0.0)
+  - image_picker_ios (0.0.1):
+    - Flutter
+  - opencv_dart (0.0.1):
+    - Flutter
+
+DEPENDENCIES:
+  - Flutter (from `Flutter`)
+  - image_picker_ios (from `.symlinks/plugins/image_picker_ios/ios`)
+  - opencv_dart (from `.symlinks/plugins/opencv_dart/ios`)
+
+EXTERNAL SOURCES:
+  Flutter:
+    :path: Flutter
+  image_picker_ios:
+    :path: ".symlinks/plugins/image_picker_ios/ios"
+  opencv_dart:
+    :path: ".symlinks/plugins/opencv_dart/ios"
+
+SPEC CHECKSUMS:
+  Flutter: e0871f40cf51350855a761d2e70bf5af5b9b5de7
+  image_picker_ios: c560581cceedb403a6ff17f2f816d7fea1421fc1
+  opencv_dart: 818b078a7168d455a7b84e1b1a0f444835ad666b
+
+PODFILE CHECKSUM: 819463e6a0290f5a72f145ba7cde16e8b6ef0796
+
+COCOAPODS: 1.15.2