Invalid version constraint

[blackbeario]

When trying to run flutter packages pub run flutter_launcher_icons:main it fails with the error Error on line 41, column 15 of pubspec.yaml: Invalid version constraint: Could not parse version "assets/images/icon.png". Unknown text at "assets/images/icon.png". image_path: "assets/images/icon.png".

Of course, I do have the file with the name icon.png in this directory.

The respective part of my pubspec.yaml file looks like this:

  flutter_icons:
  image_path: 'assets/images/icon.png'
  android: true
  ios: true

# For information on the generic Dart part of this file, see the
# following page: https://www.dartlang.org/tools/pub/pubspec

# The following section is specific to Flutter.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true

  # To add assets to your application, add an assets section, like this:
  assets:
   - assets/

[milodude]

If you see the assets section, you should set the path to the file you wanna include in your flutter project. I believe in your example should be `assets:

• assets/images/icon.png`

[blackbeario]

@milodude thanks for your reply. Leaving the assets section as - assets/ is supposed to be a catch-all for everything inside the assets folder. My other images inside assets are loaded in other parts of my app. However, I tried adding this for a test, and I'm still getting the same error unfortunately.

assets:
    - assets/images/icon.png

[MarkOSullivan94]

From a quick look at your yaml config, it looks like your indentation is incorrect unless you pasted it in wrong.

See this as an example: https://github.com/fluttercommunity/flutter_launcher_icons/blob/master/example/pubspec.yaml

[blackbeario]

I think that's just the markdown conversion or a paste issue. The first comment in this issue shows it as it actually is. 2 space indentation throughout. I referred to the example and tried several various attempts. Each is giving me the same result. I even tried replacing the png file, thinking maybe that could be the problem.

Here is the entire yaml file:

name: mobile
description: A new Flutter application.

version: 1.0.0+1

environment:
  sdk: ">=2.0.0-dev.68.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

  flutter_localizations:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.2
  rxdart: ^0.18.1
  firebase_core: ^0.2.5+1
  firebase_auth: ^0.6.2+1
  cloud_firestore: ^0.8.2+1
  tuple: ^1.0.1
  flutter_simple_dependency_injection: ^0.0.5
  package_info: ^0.3.2
  shared_preferences: ^0.4.2
  meta: ^1.1.6
  url_launcher : ^5.0.1

  bloc:
    path: ../bloc

dev_dependencies:
  flutter_test:
    sdk: flutter

  flutter_launcher_icons: ^0.7.0

  flutter_icons:
  image_path: 'assets/images/icon.png'
  android: true
  ios: true

# For information on the generic Dart part of this file, see the
# following page: https://www.dartlang.org/tools/pub/pubspec

# The following section is specific to Flutter.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true

  # To add assets to your application, add an assets section, like this:
  assets:
    - assets/

  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.io/assets-and-images/#resolution-aware.

  # For details regarding adding assets from package dependencies, see
  # https://flutter.io/assets-and-images/#from-packages

  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  # fonts:
  #   - family: Schyler
  #     fonts:
  #       - asset: fonts/Schyler-Regular.ttf
  #       - asset: fonts/Schyler-Italic.ttf
  #         style: italic
  #   - family: Trajan Pro
  #     fonts:
  #       - asset: fonts/TrajanPro.ttf
  #       - asset: fonts/TrajanPro_Bold.ttf
  #         weight: 700
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.io/custom-fonts/#from-packages

[blackbeario]

The error message seems like it's looking for a version number instead of an image path/file? Could not parse version "assets/images/icon.png"

[MarkOSullivan94]

Appreciate you sharing your yaml config

  flutter_icons:
  image_path: 'assets/images/icon.png'
  android: true
  ios: true

There seems to be no indentation after the flutter_icons:, try copy and pasting this into your yaml config.

flutter_icons:
  image_path: "assets/images/icon.png"
  android: true
  ios: true

It definitely seems like a yaml config issue because I'm seeing other related issues to that error on Google

[blackbeario]

You're absolutely right! I just realized my indentation mistake while comparing your example yaml file.

Sorry for the issue, but thank you so much for your incredibly quick replies and for the package!

[MarkOSullivan94]

I'm glad that was the issue! Happy to help.

@milodude thanks for stepping in and trying to help! Always appreciate others helping me out 🙌

[blackbeario]

@milodude I did need to an another entry for assets/images however.

To include all assets under a directory, specify the directory name with the / character at the end:

flutter:
assets:
- assets/

Note that only files located directly in the directory will be included; to add files located in subdirectories, create an entry per directory.

^^ from https://flutter.io/docs/development/ui/assets-and-images