How to run Build runner on Windows 10 from Android Studio

Question

I'm following through Google's code labs for Flutter Googlemaps,

https://codelabs.developers.google.com/codelabs/google-maps-in-flutter/#5

G Labs says

Once you've added this code, your IDE (if you are using one) should display some red squiggles, as it references a nonexistent sibling file, locations.g.dart. This generated file converts between untyped JSON structures and named objects. Create it by running the build_runner:

Build runner is supposed to output this:

$ flutter packages pub run build_runner build
[INFO] Generating build script...
[INFO] Generating build script completed, took 291ms

[INFO] Initializing inputs
[INFO] Reading cached asset graph...
[INFO] Reading cached asset graph completed, took 65ms

[INFO] Checking for updates since last build...
[INFO] Checking for updates since last build completed, took 595ms

[INFO] Running build...
[INFO] 1.2s elapsed, 0/1 actions completed.
[INFO] Running build completed, took 1.2s

[INFO] Caching finalized dependency graph...
[INFO] Caching finalized dependency graph completed, took 27ms

[INFO] Succeeded after 1.2s with 1 outputs (1 actions)

$

• I've added the 'build_runner: ^1.2.7' dev_dependency to my .yaml file, done some googling around, tried various commands in Android Studio Terminal, none of which were recognised.
• I tried changing the Terminal directory from my app directory to the C:/flutter directory, but the commands still weren't recognised.

I've no clue how to do this. In their print out of their console the cursor carat is a $, which doesn't appear for Android Studio console on windows 10, so.... confusion.

Here's the .yaml file as requested

environment:
  sdk: ">=2.1.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  google_maps_flutter: ^0.5.11
  http: ^0.12.0+1
  json_serializable: ^2.0.2


  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.3

dev_dependencies:
  pedantic: ^1.4.0
  build_runner: ^1.2.7
  flutter_test:
    sdk: flutter

Answer 1

@i6x86 correctly diagnosed the problem, I hadn't set Flutter up fully. I followed the instructions here: flutter.dev/docs/get-started/install/windows#update-your-path

Rebooted Android Studio and voila, it solved the problem.