Make Podfiles use symlinks to local pods (#14748)

bin/internal/engine.version

-e5b72e5f87cae358b457b6c1cb55c4560ce3c46c
+13cf22c284c24f81357aec6a89074a536efbf4d1

packages/flutter_tools/lib/src/cache.dart

@@ -402,6 +402,14 @@ class FlutterEngine extends CachedArtifact {
     <String>['windows-x64', 'dart-sdk-windows-x64.zip'],
   ];
 
+  // A list of cache directory paths to which the LICENSE file should be copied.
+  List<String> _getLicenseDirs() {
+    if (cache.includeAllPlatforms || platform.isMacOS) {
+      return const <String>['ios', 'ios-profile', 'ios-release'];
+    }
+    return const <String>[];
+  }
+
   @override
   bool isUpToDateInner() {
     final Directory pkgDir = cache.getCacheDir('pkg');
@@ -416,6 +424,12 @@ class FlutterEngine extends CachedArtifact {
       if (!dir.existsSync())
         return false;
     }
+
+    for (String licenseDir in _getLicenseDirs()) {
+      final File file = fs.file(fs.path.join(location.path, licenseDir, 'LICENSE'));
+      if (!file.existsSync())
+        return false;
+    }
     return true;
   }
 
@@ -447,6 +461,12 @@ class FlutterEngine extends CachedArtifact {
         os.unzip(frameworkZip, framework);
       }
     }
+
+    final File licenseSource = fs.file(fs.path.join(Cache.flutterRoot, 'LICENSE'));
+    for (String licenseDir in _getLicenseDirs()) {
+      final String licenseDestinationPath = fs.path.join(location.path, licenseDir, 'LICENSE');
+      await licenseSource.copy(licenseDestinationPath);
+    }
   }
 
   void _makeFilesExecutable(Directory dir) {

packages/flutter_tools/templates/cocoapods/Podfile-objc

@@ -4,7 +4,7 @@
 # CocoaPods analytics sends network stats synchronously affecting flutter build latency.
 ENV['COCOAPODS_DISABLE_STATS'] = 'true'
 
-def parse_KV_file(file,seperator='=')
+def parse_KV_file(file, separator='=')
   file_abs_path = File.expand_path(file)
   if !File.exists? file_abs_path
     return [];
@@ -13,12 +13,12 @@ def parse_KV_file(file,seperator='=')
   skip_line_start_symbols = ["#", "/"]
   File.foreach(file_abs_path) { |line|
       next if skip_line_start_symbols.any? { |symbol| line =~ /^\s*#{symbol}/ }
-      plugin = line.split(pattern=seperator)
+      plugin = line.split(pattern=separator)
       if plugin.length == 2
         podname = plugin[0].strip()
         path = plugin[1].strip()
         podpath = File.expand_path("#{path}", file_abs_path)
-        pods_ary.push({:name => podname,:path=>podpath});
+        pods_ary.push({:name => podname, :path => podpath});
       else
         puts "Invalid plugin specification: #{line}"
       end
@@ -27,21 +27,31 @@ def parse_KV_file(file,seperator='=')
 end
 
 target 'Runner' do
+  # Prepare symlinks folder. We use symlinks to avoid having Podfile.lock
+  # referring to absolute paths on developers' machines.
+  system('rm -rf Pods/.symlinks')
+  system('mkdir -p Pods/.symlinks/flutter')
+  system('mkdir -p Pods/.symlinks/plugins')
+
   # Flutter Pods
-  generated_xcode_build_settings = parse_KV_file("./Flutter/Generated.xcconfig")
+  generated_xcode_build_settings = parse_KV_file('./Flutter/Generated.xcconfig')
   if generated_xcode_build_settings.empty?
-    puts "Generated.xcconfig must exist. If you're running pod install manually, make sure flutter build or flutter run is executed once first."
+    puts "Generated.xcconfig must exist. If you're running pod install manually, make sure flutter packages get is executed first."
   end
-  generated_xcode_build_settings.map{ |p|
-    if p[:name]=='FLUTTER_FRAMEWORK_DIR'
-      pod 'Flutter', :path => p[:path]
+  generated_xcode_build_settings.map { |p|
+    if p[:name] == 'FLUTTER_FRAMEWORK_DIR'
+      symlink = File.join('Pods', '.symlinks', 'flutter', File.basename(p[:path]))
+      File.symlink(p[:path], symlink)
+      pod 'Flutter', :path => symlink
     end
   }
 
   # Plugin Pods
-  plugin_pods = parse_KV_file("../.flutter-plugins")
-  plugin_pods.map{ |p|
-    pod p[:name], :path => File.expand_path("ios",p[:path])
+  plugin_pods = parse_KV_file('../.flutter-plugins')
+  plugin_pods.map { |p|
+    symlink = File.join('Pods', '.symlinks', 'plugins', File.basename(p[:path]))
+    File.symlink(p[:path], symlink)
+    pod p[:name], :path => File.join(symlink, 'ios')
   }
 end
 

packages/flutter_tools/templates/cocoapods/Podfile-swift

@@ -4,7 +4,7 @@
 # CocoaPods analytics sends network stats synchronously affecting flutter build latency.
 ENV['COCOAPODS_DISABLE_STATS'] = 'true'
 
-def parse_KV_file(file,seperator='=')
+def parse_KV_file(file, separator='=')
   file_abs_path = File.expand_path(file)
   if !File.exists? file_abs_path
     return [];
@@ -13,12 +13,12 @@ def parse_KV_file(file,seperator='=')
   skip_line_start_symbols = ["#", "/"]
   File.foreach(file_abs_path) { |line|
       next if skip_line_start_symbols.any? { |symbol| line =~ /^\s*#{symbol}/ }
-      plugin = line.split(pattern=seperator)
+      plugin = line.split(pattern=separator)
       if plugin.length == 2
         podname = plugin[0].strip()
         path = plugin[1].strip()
         podpath = File.expand_path("#{path}", file_abs_path)
-        pods_ary.push({:name => podname,:path=>podpath});
+        pods_ary.push({:name => podname, :path => podpath});
       else
         puts "Invalid plugin specification: #{line}"
       end
@@ -28,21 +28,32 @@ end
 
 target 'Runner' do
   use_frameworks!
+
+  # Prepare symlinks folder. We use symlinks to avoid having Podfile.lock
+  # referring to absolute paths on developers' machines.
+  system('rm -rf Pods/.symlinks')
+  system('mkdir -p Pods/.symlinks/flutter')
+  system('mkdir -p Pods/.symlinks/plugins')
+
   # Flutter Pods
-  generated_xcode_build_settings = parse_KV_file("./Flutter/Generated.xcconfig")
+  generated_xcode_build_settings = parse_KV_file('./Flutter/Generated.xcconfig')
   if generated_xcode_build_settings.empty?
-    puts "Generated.xcconfig must exist. If you're running pod install manually, make sure flutter build or flutter run is executed once first."
+    puts "Generated.xcconfig must exist. If you're running pod install manually, make sure flutter packages get is executed first."
   end
-  generated_xcode_build_settings.map{ |p|
-    if p[:name]=='FLUTTER_FRAMEWORK_DIR'
-      pod 'Flutter', :path => p[:path]
+  generated_xcode_build_settings.map { |p|
+    if p[:name] == 'FLUTTER_FRAMEWORK_DIR'
+      symlink = File.join('Pods', '.symlinks', 'flutter', File.basename(p[:path]))
+      File.symlink(p[:path], symlink)
+      pod 'Flutter', :path => symlink
     end
   }
 
   # Plugin Pods
-  plugin_pods = parse_KV_file("../.flutter-plugins")
-  plugin_pods.map{ |p|
-    pod p[:name], :path => File.expand_path("ios",p[:path])
+  plugin_pods = parse_KV_file('../.flutter-plugins')
+  plugin_pods.map { |p|
+    symlink = File.join('Pods', '.symlinks', 'plugins', File.basename(p[:path]))
+    File.symlink(p[:path], symlink)
+    pod p[:name], :path => File.join(symlink, 'ios')
   }
 end