[Gradle] Run DependencyVersionChecker before accessing Android DSL extensions in FlutterPlugin.apply - #194918

…cyVersionChecker (flutter#195006)

Follow-up to flutter#194918; split out so that PR stays small for
cherry-picking.
Removes the `usesUnsupportedDependencyVersions`
(`OUT_OF_SUPPORT_RANGE_PROPERTY`) Gradle extra property from
`DependencyVersionChecker`, as `FlutterPlugin.apply` catches
`DependencyValidationException` directly and nothing else reads the
property.

Best the agent and my investigation work can find is that this was carry
over from when this code was in a build.gradle.kts file and we didnt
catch exceptions. I was found during manual review of flutter#194918

Part of flutter#166550.

<details><summary>Agent authored details</summary>

### Review Link (Part B diff only)

While [flutter#194918](flutter#194918) is open,
view only this PR's changes at:

https://github.com/flutter/flutter/pull/195006/files/5b5910facc17cd3d9ac87a594c187c6167f9ccc9..76d2f56c3e00ae37e016892bf7dcbe1c7fc8f675

### Background

`DependencyVersionChecker` set
`project.extra[OUT_OF_SUPPORT_RANGE_PROPERTY] = true`
(`"usesUnsupportedDependencyVersions"`) before throwing
`DependencyValidationException` and inside the `minSdkCheck` task
`doLast` action. That extra property originated when the dependency
version checker was applied as a standalone `.kts` script
(`dependency_version_checker.kts`) whose exception class could not be
referenced directly by `FlutterPlugin`. Because
`DependencyVersionChecker` and `DependencyValidationException` are
compiled in the same Kotlin module as `FlutterPlugin` and
[flutter#194918](flutter#194918) updated
`FlutterPlugin.apply` to catch `DependencyValidationException` directly,
the extra property has no remaining readers.

### Changes

1. **`DependencyVersionChecker.kt`**:
- Removes `OUT_OF_SUPPORT_RANGE_PROPERTY` and its 3-line comment
describing the Gradle extra property.
- Removes all 7 `project.extra.set(OUT_OF_SUPPORT_RANGE_PROPERTY, ...)`
calls (`checkDependencyVersions`, `configureMinSdkCheck`,
`checkGradleVersion`, `checkJavaVersion`, `checkAGPVersion` (x2), and
`checkKGPVersion`) and the `org.gradle.kotlin.dsl.extra` import.
- In `configureMinSdkCheck`, captures `rootDirPath`
(`project.rootDir.path`) and `minSdkVersion` outside `doLast` and passes
the task's `logger` to `checkMinSdkVersion(minSdkVersion, rootDirPath,
logger)` so the task action does not capture `Project`
(`packages/flutter_tools/gradle/AGENTS.md` §4).
- Updates the comment on `DependencyValidationException` to reference
`DependencyVersionChecker` instead of `the
dependency_version_checker.kts script`.
2. **`DependencyVersionCheckerTest.kt`**:
- Removes the `OUT_OF_SUPPORT_RANGE_PROPERTY`,
`ExtraPropertiesExtension`, and
`org.gradle.internal.extensions.core.extra` imports and mock setup,
keeping the `assertFailsWith<DependencyValidationException>` and logger
verification assertions in each test.
- Removed extra-property assertions (all redundant with
`assertFailsWith<DependencyValidationException>` or logger assertions
now that `OUT_OF_SUPPORT_RANGE_PROPERTY` is removed):
1. `Template versions are considered supported`: removed comment `//
Verify that the project was not marked as being out of support range.`
and `verify {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, false)
}`.
2. `AGP version in error range results in
DependencyValidationException`: removed `verify {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
3. `AGP version in warn range results in warning logs`: removed
`verify(exactly = 0) {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
4. `AGP version with unsupported major version results in
DependencyValidationException`: removed `verify {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
5. `AGP version above unsupported major version results in
DependencyValidationException`: removed `verify {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
6. `AGP version below unsupported major version is considered
supported`: removed `verify(exactly = 0) {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
7. `KGP version in error range results in
DependencyValidationException`: removed `verify {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
8. `KGP version in warn range results in warning logs`: removed
`verify(exactly = 0) {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
9. `AGP 9 built-in Kotlin skips KGP min version enforcement by default`:
removed `verify(exactly = 0) {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
10. `Java version in error range results in error logs`: removed
`verify(exactly = 1) {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
11. `Gradle version in error range results in
DependencyValidationException`: removed `verify {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
12. `Gradle version in warn range results in warning logs`: removed
`verify(exactly = 0) {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
13. `min SDK version in warn range results in warning logs`: removed
`verify(exactly = 0) {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
14. `min SDK version in error range results in
DependencyValidationException`: removed `verify(exactly = 1) {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
15. `checkMinSdkVersion throws error when in error range for min SDK
version` and `checkMinSdkVersion logs warning when in warning range for
min SDK version`: removed unused `mockExtraPropertiesExtension` local
setup.
16.
`MockProjectFactory.createMockProjectWithSpecifiedDependencyVersions`:
removed `// Extra properties extension` comment and `mockProject.extra`
stubbing; stubbed `mockTask.logger` on the registered task mock.

</details>

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [AI contribution guidelines] and understand my
responsibilities, or I am not using AI tools.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant in-code documentation (doc comments with
`///`).
- [x] If this PR introduces a new feature or capability, I created and
linked a website documentation issue or PR in [flutter/website] (or
verified none is needed).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

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…tensions in FlutterPlugin.apply (flutter#194918)

## Description

Part of [flutter#180137](flutter#180137),
[flutter#166550](flutter#166550).

I broke the check in PR 7/11
([flutter#193693](flutter#193693)) in the new
DSL migration for users that were on AGP 8.11. This fixes the mistake
and adds a test. This will likely need to be cherry picked.

<details>
<summary>Agent authored details</summary>

### Related PR

- Follow-up PR:
[flutter#195006](flutter#195006). Because
`flutter#194918` is a cherry-pick candidate, it only replaces the
`OUT_OF_SUPPORT_RANGE_PROPERTY` check in `FlutterPlugin.apply` with a
typed `catch (e: DependencyValidationException)`. Removing
`OUT_OF_SUPPORT_RANGE_PROPERTY` itself—which touches 7 property setters,
a task action, and 14 test assertions across
`DependencyVersionChecker.kt` and `DependencyVersionCheckerTest.kt`—is
split into [flutter#195006](flutter#195006) so
this cherry-pick stays minimal.

### Background

When [flutter#193813](flutter#193813)
(`ce6e766ad1c`) raised the minimum supported AGP version in
`DependencyVersionChecker` to `9.1.1` and bumped the compile-time
`agpVersion` in `packages/flutter_tools/gradle/build.gradle.kts` from
`8.11.1` to `9.1.1`, the Kotlin compiler began emitting AGP 9 binary
method signatures for calls against `ApplicationExtension` (such as
`ApplicationExtension.getDefaultConfig()Lcom/android/build/api/dsl/ApplicationDefaultConfig;`,
whereas in AGP 8.x `CommonExtension.getDefaultConfig()` returned
`DefaultConfig` without a covariant bridge on `ApplicationExtension`).

Because `FlutterPlugin.apply` invoked `addFlutterTasks(project)` (which
calls `configureAbis` -> `configureAbiWithoutSplits` ->
`extension.defaultConfig.ndk` and `DslVersionCodes.from(appExtension)`
introduced in [flutter#193693](flutter#193693)
/ [flutter#192488](flutter#192488)) before
running `DependencyVersionChecker.checkDependencyVersions(project)`,
building an AGP 8.x project crashed during `addFlutterTasks` with:

```text
java.lang.NoSuchMethodError: 'com.android.build.api.dsl.ApplicationDefaultConfig com.android.build.api.dsl.ApplicationExtension.getDefaultConfig()'
```

before reaching
`DependencyVersionChecker.checkDependencyVersions(project)`, preventing
the user from seeing the actionable minimum AGP version error message
and upgrade guidance.

### Changes

1. **`FlutterPlugin.kt`**:
- Moves `FlutterPluginUtils.detectApplyingKotlinGradlePlugin(project)`
and the `shouldSkipDependencyChecks` /
`DependencyVersionChecker.checkDependencyVersions(project)` block to the
beginning of `FlutterPlugin.apply(project)` (immediately after
`this.project = project`), before `addFlutterTasks(project)` and all
`ApplicationExtension` / Android DSL accesses.
- Replaces the `OUT_OF_SUPPORT_RANGE_PROPERTY` extra-property check in
`FlutterPlugin.apply` with a typed `catch (e:
DependencyValidationException)` that rethrows
`DependencyValidationException` directly and logs any other `Exception`,
removing the comment that described `OUT_OF_SUPPORT_RANGE_PROPERTY`.
2. **`FlutterPluginTest.kt`**:
- Adds `FlutterPlugin apply checks dependency versions before
configuring project`, verifying via `verifyOrder` that
`FlutterPluginUtils.detectApplyingKotlinGradlePlugin(project)` and
`DependencyVersionChecker.checkDependencyVersions(project)` run before
task registration, `AndroidComponentsExtension` callbacks
(`finalizeDsl`, `onVariants`), and `ApplicationExtension` DSL
configuration (`defaultConfig`, `buildTypes`).
- Adds `FlutterPlugin apply rethrows DependencyValidationException and
logs other exceptions`, verifying both exception branches without
relying on the extra property, and stubs supported Gradle and AGP
versions in `setupTestProjectEnvironment` /
`setupMockComponentsExtension`.
3. **`packages/flutter_tools/gradle/AGENTS.md`**:
- Updates the `Matrix Verification` bullet on line 40 to reference the
supported AGP and Gradle versions defined in
`DependencyVersionChecker.kt`.

### Verification

- **Unit test negative/positive verification**:
- Moving `DependencyVersionChecker` after `addFlutterTasks` or moving
`detectApplyingKotlinGradlePlugin` after `DependencyVersionChecker`
fails `FlutterPlugin apply checks dependency versions before configuring
project`.
- Reverting the typed `catch (e: DependencyValidationException)` to the
property check fails `FlutterPlugin apply rethrows
DependencyValidationException and logs other exceptions`.
  - `./gradlew test` with the fix applied: all tests pass.
- **End-to-end reproduction with AGP 8.11.1 and Gradle 9.3.1**:
- Before fix: failed at `FlutterPlugin.configureAbiWithoutSplits` with
`java.lang.NoSuchMethodError:
'com.android.build.api.dsl.ApplicationDefaultConfig
com.android.build.api.dsl.ApplicationExtension.getDefaultConfig()'`.
- After fix: fails cleanly with `Error: Your project's Android Gradle
Plugin version (Android Gradle Plugin version 8.11.1) is lower than
Flutter's minimum supported version of Android Gradle Plugin version
9.1.1. Please upgrade your Android Gradle Plugin version.`
- **Formatting**:
- `ktlint 1.5.0` with
`--editorconfig=dev/bots/test/analyze-test-input/.editorconfig
--baseline=dev/bots/test/analyze-test-input/ktlint-baseline.xml` passed
with zero findings.

</details>

---

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [AI contribution guidelines] and understand my
responsibilities, or I am not using AI tools.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant in-code documentation (doc comments with
`///`).
- [x] If this PR introduces a new feature or capability, I created and
linked a website documentation issue or PR in [flutter/website] (or
verified none is needed).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

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…cyVersionChecker (flutter#195006)

Follow-up to flutter#194918; split out so that PR stays small for
cherry-picking.
Removes the `usesUnsupportedDependencyVersions`
(`OUT_OF_SUPPORT_RANGE_PROPERTY`) Gradle extra property from
`DependencyVersionChecker`, as `FlutterPlugin.apply` catches
`DependencyValidationException` directly and nothing else reads the
property.

Best the agent and my investigation work can find is that this was carry
over from when this code was in a build.gradle.kts file and we didnt
catch exceptions. I was found during manual review of flutter#194918

Part of flutter#166550.

<details><summary>Agent authored details</summary>

### Review Link (Part B diff only)

While [flutter#194918](flutter#194918) is open,
view only this PR's changes at:

https://github.com/flutter/flutter/pull/195006/files/5b5910facc17cd3d9ac87a594c187c6167f9ccc9..76d2f56c3e00ae37e016892bf7dcbe1c7fc8f675

### Background

`DependencyVersionChecker` set
`project.extra[OUT_OF_SUPPORT_RANGE_PROPERTY] = true`
(`"usesUnsupportedDependencyVersions"`) before throwing
`DependencyValidationException` and inside the `minSdkCheck` task
`doLast` action. That extra property originated when the dependency
version checker was applied as a standalone `.kts` script
(`dependency_version_checker.kts`) whose exception class could not be
referenced directly by `FlutterPlugin`. Because
`DependencyVersionChecker` and `DependencyValidationException` are
compiled in the same Kotlin module as `FlutterPlugin` and
[flutter#194918](flutter#194918) updated
`FlutterPlugin.apply` to catch `DependencyValidationException` directly,
the extra property has no remaining readers.

### Changes

1. **`DependencyVersionChecker.kt`**:
- Removes `OUT_OF_SUPPORT_RANGE_PROPERTY` and its 3-line comment
describing the Gradle extra property.
- Removes all 7 `project.extra.set(OUT_OF_SUPPORT_RANGE_PROPERTY, ...)`
calls (`checkDependencyVersions`, `configureMinSdkCheck`,
`checkGradleVersion`, `checkJavaVersion`, `checkAGPVersion` (x2), and
`checkKGPVersion`) and the `org.gradle.kotlin.dsl.extra` import.
- In `configureMinSdkCheck`, captures `rootDirPath`
(`project.rootDir.path`) and `minSdkVersion` outside `doLast` and passes
the task's `logger` to `checkMinSdkVersion(minSdkVersion, rootDirPath,
logger)` so the task action does not capture `Project`
(`packages/flutter_tools/gradle/AGENTS.md` §4).
- Updates the comment on `DependencyValidationException` to reference
`DependencyVersionChecker` instead of `the
dependency_version_checker.kts script`.
2. **`DependencyVersionCheckerTest.kt`**:
- Removes the `OUT_OF_SUPPORT_RANGE_PROPERTY`,
`ExtraPropertiesExtension`, and
`org.gradle.internal.extensions.core.extra` imports and mock setup,
keeping the `assertFailsWith<DependencyValidationException>` and logger
verification assertions in each test.
- Removed extra-property assertions (all redundant with
`assertFailsWith<DependencyValidationException>` or logger assertions
now that `OUT_OF_SUPPORT_RANGE_PROPERTY` is removed):
1. `Template versions are considered supported`: removed comment `//
Verify that the project was not marked as being out of support range.`
and `verify {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, false)
}`.
2. `AGP version in error range results in
DependencyValidationException`: removed `verify {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
3. `AGP version in warn range results in warning logs`: removed
`verify(exactly = 0) {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
4. `AGP version with unsupported major version results in
DependencyValidationException`: removed `verify {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
5. `AGP version above unsupported major version results in
DependencyValidationException`: removed `verify {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
6. `AGP version below unsupported major version is considered
supported`: removed `verify(exactly = 0) {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
7. `KGP version in error range results in
DependencyValidationException`: removed `verify {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
8. `KGP version in warn range results in warning logs`: removed
`verify(exactly = 0) {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
9. `AGP 9 built-in Kotlin skips KGP min version enforcement by default`:
removed `verify(exactly = 0) {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
10. `Java version in error range results in error logs`: removed
`verify(exactly = 1) {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
11. `Gradle version in error range results in
DependencyValidationException`: removed `verify {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
12. `Gradle version in warn range results in warning logs`: removed
`verify(exactly = 0) {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
13. `min SDK version in warn range results in warning logs`: removed
`verify(exactly = 0) {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
14. `min SDK version in error range results in
DependencyValidationException`: removed `verify(exactly = 1) {
mockExtraPropertiesExtension.set(OUT_OF_SUPPORT_RANGE_PROPERTY, true)
}`.
15. `checkMinSdkVersion throws error when in error range for min SDK
version` and `checkMinSdkVersion logs warning when in warning range for
min SDK version`: removed unused `mockExtraPropertiesExtension` local
setup.
16.
`MockProjectFactory.createMockProjectWithSpecifiedDependencyVersions`:
removed `// Extra properties extension` comment and `mockProject.extra`
stubbing; stubbed `mockTask.logger` on the registered task mock.

</details>

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [AI contribution guidelines] and understand my
responsibilities, or I am not using AI tools.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant in-code documentation (doc comments with
`///`).
- [x] If this PR introduces a new feature or capability, I created and
linked a website documentation issue or PR in [flutter/website] (or
verified none is needed).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

If this change needs to override an active code freeze, provide a
comment explaining why. The code freeze workflow can be overridden by
code reviewers. See pinned issues for any active code freezes with
guidance.

**Note**: The Flutter team is currently trialing the use of [Gemini Code
Assist for
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Comments from the `gemini-code-assist` bot should not be taken as
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disagree with the feedback, please feel free to wait for a Flutter team
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https://github.com/flutter/flutter/blob/main/CONTRIBUTING.ai.md
[Tree Hygiene]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
[test-exempt]:
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[Flutter Style Guide]:
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[Features we expect every widget to implement]:
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[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[flutter/website]: https://github.com/flutter/website
[breaking change policy]:
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[Discord]:
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[Data Driven Fixes]:
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