feat(gradlew): Gradle support for Android/Kotlin developers by kherembourg · Pull Request #312 · rtk-ai/rtk

kherembourg · 2026-03-03T21:38:35Z

Summary

Comprehensive Gradle support for Android and Kotlin developers using ./gradlew (or gradle). Filters verbose Gradle output down to what matters — status, errors, and results — with 60–85% token savings depending on the task.

This PR covers the full Android development workflow: building, testing, linting, installing to devices, dependency inspection, and project cleanup.

Commands Handled

Command	Filter	Token Savings
`rtk gradlew assembleDebug`	Build (streaming) — status + errors only	~75%
`rtk gradlew bundleRelease`	Build (streaming) — same filter	~75%
`rtk gradlew clean`	Build (streaming) — strips task noise	~70%
`rtk gradlew installDebug`	Build (streaming) — install to device	~75%
`rtk gradlew uninstallDebug`	Build (streaming) — uninstall from device	~75%
`rtk gradlew check`	Build (streaming) — full check (test + lint)	~70%
`rtk gradlew testDebugUnitTest`	Test (batch) — failures only	~85%
`rtk gradlew connectedDebugAndroidTest`	Connected test (batch) — failures + device summary	~80%
`rtk gradlew lint`	Lint (batch) — violations grouped by file	~75%
`rtk gradlew dependencies`	Dependencies (batch) — top-level deps only per configuration	~60%
`rtk gradlew <other>`	Passthrough — raw output	0%

Features

Streaming output: Build tasks stream filtered output line-by-line (no buffering)
Progress spinner: Real-time stderr spinner with elapsed time and current task name during long builds. Zero stdout contamination — only appears in interactive terminals (is_terminal() guard)
Gradle fallback: Automatically uses system gradle when ./gradlew wrapper is not found in the project
Verbose bypass: --stacktrace, --info, --debug flags bypass all filtering for full output
CLI aliases: rtk ./gradlew and rtk gradle both work as aliases for rtk gradlew
Hook rewrites: ./gradlew <cmd> and gradle <cmd> are automatically rewritten to rtk gradlew <cmd> by the hook
Windows support: gradlew.bat detected automatically
Exit code preservation: Non-zero exit codes propagated correctly for CI/CD

Architecture

Task detection: Last non-flag, non-clean argument determines the filter strategy
5 filter strategies: Build (streaming), Test (batch), Connected Test (batch), Lint (batch), Dependencies (batch), plus passthrough for unknown tasks
Build filter: Strips > Task : progress lines, daemon messages, configuration noise; keeps BUILD SUCCESSFUL/FAILED, error lines, and warnings
Test filter: Keeps only test class results and failure details
Dependencies filter: Parses Gradle tree format, keeps config headers and top-level deps only

Quality Checks

cargo fmt --all --check — clean
cargo clippy --all-targets — no new warnings
cargo test --all — 494 passed, 0 failed
48 gradlew-specific tests covering task detection, all filters, edge cases
Test fixtures from real ./gradlew output on an Android project
Token savings verified ≥60% on all filters
README, CHANGELOG, CLAUDE.md updated
Hook updated with gradle rewrite support

Manual Testing

Manually tested on a real Android project with ./gradlew:

🤖 Generated with Claude Code

FlorianBruniaux · 2026-03-05T18:55:44Z

Hi @yonatankarp, @rubixhacker, @kherembourg! Three Gradle PRs are open at the same time (#263, #288, #312) — they overlap significantly on gradle_cmd.rs. Could you coordinate? We'd like to pick the best base and have the others contribute additions rather than landing three competing implementations. Pinging all three to discuss approach before we do deep review.

pszymkowiak · 2026-03-06T12:44:34Z

Strong implementation — best architecture of the Gradle PRs (streaming/batch/passthrough). 48 tests, real fixtures, Windows .bat detection. A few fixes needed:

Rebase on master
check task routes to Build filter — drops test failures, should route to Test
INSTRUMENTATION_CODE: leak — not stripped by connected filter
Token savings thresholds — 40% in tests, project minimum is 60%
No snapshot tests — project policy requires insta::assert_snapshot!

Note: 3 other PRs cover similar scope (#288, #368, #374). This is the strongest Gradle implementation so far.

pszymkowiak · 2026-03-06T13:11:28Z

Note: this PR adds rules to rtk-rewrite.sh, but since #241 (rtk rewrite), all rewrite logic lives in Rust (src/discover/rules.rs + src/discover/registry.rs). The bash hook now just calls rtk rewrite "$cmd".

Please remove the changes to .claude/hooks/rtk-rewrite.sh and .claude/hooks/rtk-suggest.sh, and add your gradle patterns to rules.rs / registry.rs instead.

yonatankarp · 2026-03-06T14:36:21Z

I am very much fine with picking either, I implemented very basic functionality just so the PR will not endup as 24k lines of code 😄

kherembourg · 2026-03-07T20:05:13Z

Hello @yonatankarp
Same for me, fine with either! Sorry I didn't see you PR before mine.
I see you closed yours, are you ok with this one? Anything you want to add?

We can also merge everything with your PR @rubixhacker but I personally prefer to not mix maven and gradle.

kherembourg · 2026-03-07T20:40:20Z

Thanks for the thorough review @pszymkowiak! All 5 items addressed in the latest push (rebased on master + 1 fix commit):

Rebased on master ✅ — resolved 4 conflicts (main.rs, README, CHANGELOG, rtk-rewrite.sh)
check → Test filter ✅ — detect_task now routes check to GradlewTask::Test so test failures are preserved
INSTRUMENTATION_CODE: leak ✅ — added INSTRUMENTATION_CODE regex to filter_connected skip conditions
Token savings ≥60% ✅ — thresholds raised from 40% to 60%; lint fixture expanded for realistic savings (~75%)
Snapshot tests ✅ — added 6 insta::assert_snapshot! tests covering all filter outputs (build success/fail, test success/fail, connected, lint)

772 tests passing (61 gradlew + 163 discover + rest of suite), cargo fmt + cargo clippy clean.

kherembourg · 2026-03-07T20:40:25Z

Done ✅ — removed all changes to rtk-rewrite.sh (took master's thin delegator during rebase) and removed the gradle section from rtk-suggest.sh.

Added gradle patterns to Rust instead:

rules.rs: regex pattern matching ./gradlew, gradlew.bat, gradlew, gradle with optional subcommand capture for savings lookup
registry.rs: RtkRule with 4 rewrite_prefixes, category "Build", base 70% savings, 85% for test subcommand + 9 tests (classify, rewrite, savings)

rubixhacker · 2026-03-07T21:36:42Z

I am good with dropping my PR @kherembourg and doing a separate one targeting Maven 😄 Your PR is more comprehensive for Gradle

kherembourg · 2026-03-07T21:45:20Z

Thanks @rubixhacker

sishbi · 2026-03-10T14:47:26Z

Any update on when this will be merged?

sishbi · 2026-03-10T14:49:45Z

Reviewing the code, I think I prefer this PR instead of #381 Sorry @sebastianbarrozo 😄
You could collaborate, if needed, to get this command into RTK sooner 😉

… indicator Comprehensive Gradle/Android support: build, test, lint, clean, install, uninstall, check, and dependencies filters with live progress spinner. Falls back to system gradle when wrapper not found. Hook rewrites ./gradlew and gradle commands automatically. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

…ot tests - Move gradle hook rewrites from bash to Rust (rules.rs/registry.rs) - Remove gradle section from rtk-suggest.sh (now handled by rtk rewrite) - Route `check` task to Test filter (was Build, dropped test failures) - Strip INSTRUMENTATION_CODE: lines in connected test filter - Raise token savings thresholds from 40% to 60% (project minimum) - Add 6 insta::assert_snapshot! tests for all filter outputs - Add 9 registry tests for gradle rewrite patterns - Expand lint fixture for realistic savings (>60%) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

kherembourg · 2026-03-11T21:21:32Z

I understand reviewers are likely swamped with PRs right now, so it might take a while to get a full review. Happy to make any changes needed to help move this along, just let me know!

kherembourg force-pushed the feat/gradlew-android-support branch from 655e291 to d407be4 Compare March 3, 2026 21:42

FlorianBruniaux mentioned this pull request Mar 5, 2026

feat: add Gradle test filter support #263

Closed

4 tasks

This was referenced Mar 5, 2026

feat: Add Gradle and Maven support #288

Closed

feat: TOML Part 1 — filter DSL engine + 14 built-in filters #349

Merged

pszymkowiak mentioned this pull request Mar 6, 2026

feat: add Gradle/Gradlew support with compact output (80-90% token reduction) #374

Closed

4 tasks

pszymkowiak added the awaiting-changes label Mar 6, 2026

sebastianbarrozo mentioned this pull request Mar 6, 2026

feat(gradle): add Gradle/Gradlew support with compact output (80-90% token reduction) #381

Open

8 tasks

kherembourg force-pushed the feat/gradlew-android-support branch from d407be4 to d34813e Compare March 7, 2026 20:38

kherembourg and others added 2 commits March 11, 2026 22:19

kherembourg force-pushed the feat/gradlew-android-support branch from d34813e to a5f7d4a Compare March 11, 2026 21:19

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feat(gradlew): Gradle support for Android/Kotlin developers#312

feat(gradlew): Gradle support for Android/Kotlin developers#312
kherembourg wants to merge 2 commits intortk-ai:masterfrom
kherembourg:feat/gradlew-android-support

kherembourg commented Mar 3, 2026

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FlorianBruniaux commented Mar 5, 2026

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pszymkowiak commented Mar 6, 2026

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yonatankarp commented Mar 6, 2026

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kherembourg commented Mar 7, 2026

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kherembourg commented Mar 7, 2026

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kherembourg commented Mar 7, 2026

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rubixhacker commented Mar 7, 2026

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sishbi commented Mar 10, 2026

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kherembourg commented Mar 3, 2026

Summary

Commands Handled

Features

Architecture

Quality Checks

Manual Testing

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FlorianBruniaux commented Mar 5, 2026

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pszymkowiak commented Mar 6, 2026

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pszymkowiak commented Mar 6, 2026

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yonatankarp commented Mar 6, 2026

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