更改配置flutter build apk，找不到目标文件“lib/main.dart”

Question

Hey guys how to i changing target flutter build apk cause i getting error target file not found on console:

(base) dendimuhmd@mbp-dendimuhmd makanyuk % flutter build apk --release            
Target file "lib/main.dart" not found.

Folder structure

Answer 1

Your main.dart file is located in lib/src folder. It is required to be in lib folder to work properly. The following is mentioned in the docs of Flutter VS code extension website.

Flutter entry points should be at lib/main.dart Launch Configuration

The following are the possible configuration on the website.

"configurations": [
    {
        // A name for the launch config. This will show in the dropdown on the Run side bar.
        "name": "Current File (release mode)",

        // This should always be "dart" for Dart/Flutter apps.
        // This selects the Dart debugger.
        "type": "dart",

        // This can be "launch" to start an app, or "attach" to attach to an existing app.
        "request": "launch",

        // The directory to start running the app from.
        "cwd": "/foo/bar",

        // The entry script to execute when running the app.
        // Set to a "web" in a Dart web app to run in web move.
        // Set to "test" in an app with tests to run all tests.
        "program": "bin/main.dart",

        // Any custom environment variables to set when running the app with this
        // launch config.
        "env": {
            "RELEASE_MODE": true
        }

        // Arguments to be passed to the Dart or Flutter app.
        "args": [
            "--dart-define", "MY_VAR=foo"
        ],

        // "debugConsole" or "terminal". If set to "terminal", will run in the built-in
        // terminal and will support reading from `stdin`. However some other debug
        // features may be limited.
        "console": "debugConsole",

        // Set to run a Flutter app on a specific device, ignoring the device selected
        // in the status bar.
        "deviceId": "iphone",

        // "debug", "profile" or "release".
        "flutterMode": "debug",

        // Allows running Flutter tests on a real device instead of the default headless
        // flutter-tester device.
        "runTestsOnDevice": false,

        // If codeLens is defined, this launch configuration can be launched from custom
        // CodeLens links in the editor (see the page linked above for more info).
        "codeLens": {

            // This array sets where custom CodeLens links will be rendered:
            // - run-test: Above test functions as a Run link
            // - debug-test: Above test functions as a Debug link
            // - run-test-file: Above main functions in test files as a Run link
            // - debug-test-file: Above main functions in test files as a Debug link
            // - run-file: Above main functions in bin/tool/lib files as a Run link
            // - debug-file: Above main functions in bin/tool/lib files as a Debug link
            "for": [ "run-test", "run-test-file", "debug-test", "debug-test-file" ],

            // If specificed, the custom CodeLens will only appear for files that begin
            // with this path.
            "path": "test/integration_tests",

            // Text for the custom CodeLens. If not specified, will use the name field
            // from the parent launch configuration. The string "${debugType}" here will
            // be replaced with "run" or "debug" depending on the rendered position
            // (see the for field above).
            "title": "${debugType} (release)"
        },
    }
]

Answer 2

You can use -t to change the target.

The main entry-point file of the application, as run on the device. If the "--target" option is omitted, but a file name is provided on the command line, then that is used instead. (defaults to "lib\main.dart")

For your case

flutter build apk  -t .\lib\src\main.dart