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[flutter_tool] Add some useful commands to the README.md (#36560)

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Zachary Anderson 2019-07-23 09:47:06 -07:00 committed by GitHub
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# Flutter Tools
Developer tools for building Flutter applications.
Command line developer tools for building Flutter applications.
Be sure to follow the instructions on
[CONTRIBUTING.md](../../CONTRIBUTING.md) to setup.
## Working on Flutter Tools
To run the tests, ensure that no devices are connected,
then navigate to `flutter_tools` and execute:
Be sure to follow the instructions on [CONTRIBUTING.md](../../CONTRIBUTING.md)
to set up your development environment.
### Setup
First, ensure that the Dart SDK and other necessary artifacts are available by
invoking the Flutter Tools wrapper script. In this directory run:
```shell
../../bin/cache/dart-sdk/bin/pub run test
$ ../../bin/flutter --version
```
### Running
To run Flutter Tools from source, in this directory run:
```shell
$ ../../bin/cache/dart-sdk/bin/dart bin/flutter_tools.dart
```
followed by command line arguments, as usual.
### Analyzing
To run the analyzer on Flutter Tools, in this directory run:
```shell
$ ../../bin/flutter analyze
```
### Testing
To run the tests in the `test/` directory, first ensure that there are no
connected devices. Then, in this directory run:
```shell
$ ../../bin/cache/dart-sdk/bin/pub run test
```
The tests in `test/integration.shard` are slower to run than the tests in
`test/general.shard`. To run only the tests in `test/general.shard`, in this
directory run:
```shell
$ ../../bin/cache/dart-sdk/bin/pub run test test/general.shard
```
To run the tests in a specific file, run:
```shell
$ ../../bin/cache/dart-sdk/bin/pub run test test/general.shard/utils_test.dart
```
When running all of the tests, it is a bit faster to use `build_runner`. First,
set `FLUTTER_ROOT` to the root of your Flutter checkout. Then, in this directory
run:
```shell
$ ../../bin/cache/dart-sdk/bin/pub run build_runner test
```
### Forcing snapshot regeneration
To force the Flutter Tools snapshot to be regenerated, delete the following
files:
```shell
$ rm ../../bin/cache/flutter_tools.stamp ../../bin/cache/flutter_tools.snapshot
```