Update min SDK for build web compilers

build_web_compilers/CHANGELOG.md

@@ -1,6 +1,8 @@
-## 4.0.12-wip
+## 4.0.12
 
-- Bump the min sdk to 3.5.0.
+- Support compiling to WebAssembly by using `dart2wasm` as a value for the
+ compiler option.
+- Bump the min sdk to 3.6.0-150.0.dev.
 
 ## 4.0.11
 

build_web_compilers/README.md

@@ -41,11 +41,12 @@ then all you need is the `dev_dependency` listed above.
 
 ### Configuring the default compiler
 
-By default, the [Dart development compiler][] (_dartdevc_, also known as
-_DDC_) will be used.
+By default, this package uses teh [Dart development compiler][] (_dartdevc_,
+also known as _DDC_) to compile Dart to JavaScript. In release builds (running
+the build tool with `--release`, the default compiler is `dart2js`).
 
-If you would like to opt into dart2js you will need to add a `build.yaml`
-file, which should look roughly like the following:
+If you would like to opt into dart2js for all builds, you will need to add a
+`build.yaml` file, which should look roughly like the following:
 
 ```yaml
 targets:
@@ -63,6 +64,22 @@ targets:
  - -O2
 ```
 
+In addition to DDC and dart2js, this package also supports the dart2wasm
+compiler for compiling to JavaScript. It can be enabled by using
+`compiler: dart2wasm` in the build configuration:
+
+```yaml
+targets:
+ $default:
+ builders:
+ build_web_compilers:entrypoint:
+ options:
+ compiler: dart2wasm
+ # List flags that should be forwarded to `dart compile wasm`
+ dart2wasm_args:
+ - -O2
+```
+
 ### Configuring -D environment variables
 
 dartdevc is a modular compiler, so in order to ensure consistent builds
@@ -93,6 +110,21 @@ targets:
  - -DANOTHER_VAR=true
 ```
 
+Similarly, options are passed to `dart compile wasm` when using the
+`dart2wasm_args` option:
+
+```yaml
+targets:
+ $default:
+ builders:
+ build_web_compilers:entrypoint:
+ options:
+ compiler: dart2wasm
+ dart2wasm_args:
+ - -DSOME_VAR=some value
+ - -DANOTHER_VAR=true
+```
+
 These may also be specified on the command line with a `--define` argument.
 
 ```sh

build_web_compilers/pubspec.yaml

@@ -5,7 +5,7 @@ repository: https://github.com/dart-lang/build/tree/master/build_web_compilers
 resolution: workspace
 
 environment:
- sdk: '>=3.5.0 <3.7.0'
+ sdk: '>=3.6.0-150.0.dev <3.7.0'
 
 dependencies:
  analyzer: '>=5.1.0 <7.0.0'