ADFA-4931: Quick Build links the Gradle distribution's Kotlin compiler instead of bundling its own - #2090
ADFA-4931: Quick Build links the Gradle distribution's Kotlin compiler instead of bundling its own#2090fryanpan wants to merge 22 commits into
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Copilot review overview
🟡 Changes recommended
Release builds currently bypass the linked-jar distribution check, allowing an invalid production asset to ship.
Review effort: Balanced
Findings: 1
What changed in this PR
Links Quick Build’s daemon dependencies to the bundled Gradle distribution, substantially reducing APK size.
Changes:
- Adds symlink staging with a copy fallback and regression tests.
- Aligns daemon dependencies with the distribution’s Kotlin toolchain.
- Updates architecture and operational documentation.
Review evidence: Error handling, path validation, threading, tests, and architecture alignment were checked. One blocking issue remains: release builds skip distribution-jar validation because only the Brotli archive is available.
| File | Description |
|---|---|
QuickBuildArtifactStager.kt |
Links or copies distribution jars. |
QuickBuildArtifactStagerTest.kt |
Extends staging and retry tests. |
QuickBuildArtifactStagerDistLinkTest.kt |
Tests linking, fallback, and validation. |
app/build.gradle.kts |
Excludes shared jars and adds build checks. |
quickbuild/daemon/build.gradle.kts |
Aligns daemon dependency versions. |
gradle/libs.versions.toml |
Adds distribution-specific versions. |
build-info/build.gradle.kts |
Reuses the Gradle version constant. |
ARCHITECTURE.md |
Documents shared toolchain behavior. |
docs/adr/0016-quick-build-compiles-outside-gradle.md |
Records the compiler-sharing decision. |
quickbuild/docs/pipeline.md |
Updates provisioning details. |
quickbuild/docs/debugging.md |
Documents linked-jar diagnostics. |
quickbuild/daemon/README.md |
Documents daemon classpath constraints. |
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| // Optional because release builds fetch the brotli-encoded distribution and never | ||
| // materialise this one. doLast reports that as unchecked rather than as a pass. | ||
| inputs | ||
| .files(distArchive) | ||
| .withPropertyName("gradleDistributionArchive") | ||
| .optional(true) |
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MINOR: Agreed: release and CI builds never run the jar-presence half of this check. I grade it MINOR rather than blocking because nothing that ships today is broken. The debug gradle-9.6.1-bin.zip carries all 8 names under lib/, and the PR reports a device run against the release distribution.
It is a hole in this PR's own safety net. CI sets GITHUB_ACTIONS, so assetsDownloadDebug never runs, and release builds only fetch the .br. Both take the UNCHECKED branch and pass. A dev-assets refresh that renames one jar would then ship green and fail every user's first Quick Build with a FileNotFoundException. The PR body's "fails the build if ... a linked jar is missing" overstates what the check does.
Fix: check the archive the build packages. On a release build, decode assets/release/common/data/common/gradle-9.6.1-bin.zip.br (the workflows already use the brotli CLI) and look the 8 entries up there, so UNCHECKED can only happen off CI.
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Real, fixed in 81ba158, b2f88e8 and f79bedd. The check now stream-decodes assets/release/common/data/common/gradle-9.6.1-bin.zip.br and looks up all 9 names there (app/build.gradle.kts:615). Every variant that bundles the distribution has its daemon-zip copy depend on quickBuildBundledDistGate, which fails when the .br is absent (:632, :715). A debug build with neither archive, CI's case, logs NOT PACKAGED, since its APK bundles no distribution (:622). With kotlin-reflect removed from the real .br: gradle-9.6.1/lib/kotlin-reflect-2.3.21.jar is missing from gradle-9.6.1-bin.zip.br. The old check logged UNCHECKED and passed on the same file. PR body corrected.
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Stack: layer 12 of 12 in the ADFA-4128 Quick Build stack (#1713 to #1723 below it, nothing above). So this head, f6ef914653, is also the stack tip that every claim was checked against.
MINOR
- app/build.gradle.kts:554 - release and CI builds skip the jar-presence check (reply in the existing Copilot thread)
- app/build.gradle.kts:540 - the check is not ordered after
assetsDownloadDebug - QuickBuildArtifactStager.kt:89 - the skip path does not check that the linked jars still resolve
NITPICK - 4 inline, not listed
Prior round: Copilot's single finding (release builds skip the check) is still open at this head. I graded it MINOR in its own thread.
Evidence
- Ticket ADFA-4931 (one Kotlin compiler, smaller APK): the daemon zip leaves out the 8 jars and the stager links them. I did not re-measure the 57.6 MB.
- Distribution:
assets/gradle-9.6.1-bin.ziphas all 8 linked names undergradle-9.6.1/lib/. The release.brwas not available to check here. - Daemon classpath:
:quickbuild:daemon:dependencies --configuration runtimeClasspathat this head resolves gson 2.13.1, asm 9.9, coroutines 1.10.2 (raised by the constraint) and kotlin-reflect 1.6.10. - Exceptions: link failures throw
IOExceptions inside thetryofrunProxyAppBuild, which turns them into a failed provision. Nothing new reaches GlitchTip. - Security: list names must be bare file names.
../is tested, and..resolves to a directory, which failsisFile. - Tests: not re-run here. The PR reports 30/30 lines and 14/14 branches on the new code.
- Leaks, threading, a11y, help, plugin API: not applicable. No lifecycle registrations, no new threads, no UI, no plugin-api change.
Not posted:
- The provisioner shows the generic "setup failed" string rather than the new message naming the missing path. The path is logged, and a missing distribution jar is not something the user can fix.
- The "link rather than copy" test would fail on a host that refuses symlinks. I found no sign the unit suite runs on such a host.
Verdict: COMMENT. There are only MINOR and NITPICK findings. REVIEW.md blocks on a concrete risk or a missing requirement, and neither applies.
| val expected = quickBuildDistLinkedJars | ||
| val distName = GRADLE_DISTRIBUTION_NAME | ||
| val archiveName = GRADLE_DISTRIBUTION_ARCHIVE_NAME | ||
| val distArchive = rootProject.file("assets/$archiveName") |
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MINOR: Nothing orders this check after assetsDownloadDebug, the task that writes assets/gradle-9.6.1-bin.zip.
A local assembleV8Debug depends on assetsDownloadDebug and, through copyV8DebugQuickBuildDaemonZip -> quickBuildDaemonZip, on this task, but there is no edge between the two, so Gradle may run the check first. On a fresh clone it then finds no archive, logs UNCHECKED and passes. When the remote checksum has moved, it validates the old archive just before the download replaces it. Either way, the build that brings in a new distribution is the one that does not check it. This only affects local builds, since CI never downloads here.
Fix: mustRunAfter("assetsDownloadDebug") on quickBuildDistJarCheck.
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Real, fixed in fd64fd1: mustRunAfter("assetsDownloadDebug", "assetsDownloadRelease") at app/build.gradle.kts:543, with the release download too, since the check now reads the .br. A --dry-run of :app:quickBuildDistJarCheck :app:assetsDownloadDebug lists the download first; with the line removed it lists the check first. A dry run is the only check a task edge has, so there is no unit test for it.
| val count = extractDaemonZip(openZip(), daemonDir) | ||
| // Must run before the stamp is written, or a failed link would be stamped as done and | ||
| // never retried. | ||
| linkDistJars(daemonDir, gradleDists) |
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MINOR: The skip path at line 89 trusts the stamp and the daemon jar, but not the links this call makes.
Before this PR, a matching stamp meant daemon/ was self-contained. Now 8 of its entries are symlinks into gradle-dists/gradle-9.6.1/lib, which BundledAssetsInstaller and SplitAssetsInstaller deleteRecursively() before re-extracting. If the distribution is gone or half-extracted while the APK is unchanged, the stamp still matches and staging returns false. The daemon then hits the mid-compile NoClassDefFoundError that linkDistJars exists to report up front. MINOR because I found no current path that removes the distribution without an APK update (which changes the stamp), and the proxy app's Gradle build, which runs right after staging, would usually fail first.
Fix: before skipping, also require every name in dist-linked-jars.txt to pass isFile() in daemonDir, which follows the link.
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Real, fixed in 1b01fb5. The skip at QuickBuildArtifactStager.kt:83 now also needs linkedJarsResolve (:194), which requires every name in dist-linked-jars.txt to pass isFile() through its link. Three new tests in QuickBuildArtifactStagerTest (:206-245): a deleted link re-stages, a deleted list re-stages, and a vanished distribution throws at staging. With the check removed they fail with expected to be true and expected instance of: java.io.FileNotFoundException but was: null; the list test fails the same way when its catch returns true.
| "kotlin-stdlib-$KOTLIN_VERSION.jar", | ||
| "kotlin-build-tools-impl-$KOTLIN_VERSION.jar", | ||
| "kotlin-daemon-embeddable-$KOTLIN_VERSION.jar", | ||
| "kotlin-script-runtime-$KOTLIN_VERSION.jar", |
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NITPICK: kotlin-reflect could join this list, saving about 3 MB more.
The distribution ships kotlin-reflect-2.3.21.jar in lib/, but the daemon resolves kotlin-reflect:1.6.10, which the POM of kotlin-compiler-embeddable:2.3.21 pins (checked with :quickbuild:daemon:dependencies --configuration runtimeClasspath at this head). So the zip still carries its own copy, of an older version.
Fix: pin kotlin-reflect to KOTLIN_VERSION with a constraint, as for coroutines, then link it. The daemon README says excluding it breaks compiles, so the :quickbuild:daemon suite would need to pass on 2.3.21 first.
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Done in df6e21d. A constraint pins kotlin-reflect to KOTLIN_VERSION (quickbuild/daemon/build.gradle.kts:124), so it resolves 1.6.10 -> 2.3.21, and it joins the linked list (app/build.gradle.kts:526). The full :quickbuild:daemon suite passes on 2.3.21 (234 tests, 0 failures), and both distributions carry lib/kotlin-reflect-2.3.21.jar. The daemon zip drops from 4.4 MB to 1.7 MB. On the A56 it is linked like the other 8, and a Compose edit compiles and reloads through it.
| "kotlin-script-runtime-$KOTLIN_VERSION.jar", | ||
| // These three carry their own version rather than KOTLIN_VERSION, pinned in | ||
| // libs.versions.toml to what the distribution ships so they can be linked from there. | ||
| "kotlinx-coroutines-core-jvm-1.10.2.jar", |
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NITPICK: These three versions repeat libs.versions.toml (kotlinx-coroutines-core-jvm-quickBuildDaemon, gson-quickBuildDaemon, ow2-asm).
quickBuildDistJarCheck catches drift, so nothing breaks. But bumping any of those catalog entries now needs a second edit here, and the build only says so by failing.
Fix: build the names from the catalog, e.g. "gson-${libs.gson.quickBuildDaemon.get().version}.jar".
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Done in 6373606: the three names come from the catalog (app/build.gradle.kts:529-531). Bumping gson-quickBuildDaemon to 2.13.2 now fails where it should, with gradle-9.6.1/lib/gson-2.13.2.jar is missing from gradle-9.6.1-bin.zip.br. Before, the same bump failed by blaming the classpath for the stale gson-2.13.1.jar.
| import java.nio.file.Path | ||
| import java.util.zip.ZipInputStream | ||
|
|
||
| /** |
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NITPICK: This class KDoc is out of date. It still says daemon/ holds the extracted runtime classpath, and that skipping "saves a 62 MB extraction per provision". The zip is 4.4 MB now, and 8 of those entries are symlinks into the Gradle distribution.
pipeline.md and debugging.md were updated, so a reader of this class gets a different layout from the one the docs describe.
Fix: update the size and mention the linked jars, as step 1 of pipeline.md now does.
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Fixed in a17a838. The class KDoc (QuickBuildArtifactStager.kt:16-22) now names the linked jars and the 1.9 MB the extraction actually writes after kotlin-reflect moved out, and says a broken link also re-stages.
| # The Quick Build daemon's compiler, which it loads from the on-device Gradle distribution | ||
| # rather than shipping its own. Must equal org.adfa.constants.KOTLIN_VERSION (the Kotlin that | ||
| # distribution embeds); :app's quickBuildDistJarCheck fails the build if they differ. | ||
| kotlin-daemon-compiler = "2.3.21" |
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NITPICK: This is a second copy of org.adfa.constants.KOTLIN_VERSION, and the version-pin half of quickBuildDistJarCheck exists only to keep the two equal.
Every Kotlin bump now needs two edits, and a mismatch only shows up when quickBuildDaemonZip runs.
Fix: have :quickbuild:daemon take kotlin-build-tools-* and the compose plugin at KOTLIN_VERSION, as quickBuildDistLinkedJars already does. The tie then holds by construction, and the pin check can go.
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Done in baaa972. kotlin-daemon-compiler is gone; :quickbuild:daemon takes build-tools-api, build-tools-impl and the compose plugin at KOTLIN_VERSION (quickbuild/daemon/build.gradle.kts:109, :131, :137), and the pin check is deleted. All three resolve to 2.3.21, and no tracked file still names kotlin-daemon-compiler.
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WalkthroughQuick Build excludes nine Gradle-distribution JARs from the daemon ZIP and records their names in a manifest. A build task checks the JARs in the daemon classpath and available distribution archives. During staging, the listed JARs are linked from the on-device Gradle distribution or copied if linking fails. ChangesQuick Build shared JARs
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Refactor Sequence Diagram(s)sequenceDiagram
participant QuickBuildArtifactStager
participant DaemonZip
participant GradleDistribution
participant DaemonDirectory
QuickBuildArtifactStager->>DaemonZip: Extract daemon and linked-JAR manifest
QuickBuildArtifactStager->>GradleDistribution: Read listed JARs from lib
QuickBuildArtifactStager->>DaemonDirectory: Create symbolic links or copy JARs
QuickBuildArtifactStager->>DaemonDirectory: Write install stamp after linking
Merge Risk: ⚪ Minimal · up to Quick Build reuses JARs from the installed Gradle distribution, with build-time checks and staging safeguards described in the change context. No material merge risk remains in the reviewed scope; proceed with normal checks. Architecture SummaryArchitecture risk: 🔵 Low · up to The change affects 7 systems. Changed systems: Architecture concerns Review detailsSystems and components
Before / after behavior
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 35.14% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 37 functions across 7 files. (1 skipped: 1 unsupported.)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Review comments at @app/build.gradle.kts:
- Around line 577-584: Add a release packaging gate to quickBuildDistJarCheck
that validates every required JAR entry in the decoded distribution before it is
published, including when the uncompressed assets/$archiveName file is absent
and release packaging uses $archiveName.br. Preserve the existing local-build
unchecked behavior where appropriate, but ensure quickBuildDaemonZip cannot
publish a release distribution with unchecked required entries.
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ARCHITECTURE.mdapp/build.gradle.ktsapp/src/main/java/com/itsaky/androidide/quickbuild/QuickBuildArtifactStager.ktapp/src/test/java/com/itsaky/androidide/quickbuild/QuickBuildArtifactStagerDistLinkTest.ktapp/src/test/java/com/itsaky/androidide/quickbuild/QuickBuildArtifactStagerTest.ktbuild-info/build.gradle.ktsdocs/adr/0016-quick-build-compiles-outside-gradle.mdgradle/libs.versions.tomlquickbuild/daemon/README.mdquickbuild/daemon/build.gradle.ktsquickbuild/docs/debugging.mdquickbuild/docs/pipeline.md
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Nothing ordered quickBuildDistJarCheck after assetsDownloadDebug, so a build that brings in a new distribution could check the old archive, or find none and pass. The release download gets the same edge, since the check now reads the release archive too. Review: PR #2090, Daniel 4161297297. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N1o4KqT54Vp2zpakJ54sbU
The coroutines, gson and asm names repeated the versions in libs.versions.toml, so a catalog bump needed a second edit here that only the jar check would ask for. Building the names from the catalog entries the daemon resolves keeps one copy. Review: PR #2090, Daniel 4161297312. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N1o4KqT54Vp2zpakJ54sbU
A matching stamp used to mean daemon/ was self-contained. Its linked jars now point into the Gradle distribution, which the assets installers delete and re-extract, so the stamp alone could skip staging over a broken link and leave the daemon to fail mid-compile. The skip now also requires every name in dist-linked-jars.txt to pass isFile() in the daemon dir. Review: PR #2090, Daniel 4161297302. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N1o4KqT54Vp2zpakJ54sbU
The daemon resolved kotlin-reflect 1.6.10, which kotlin-compiler-embeddable's POM pins, so the zip carried its own older copy while the distribution ships 2.3.21 in lib/. A constraint now takes it to KOTLIN_VERSION and the jar joins the linked list. The full :quickbuild:daemon suite passes on 2.3.21 (234 of 234, 0 skipped). Review: PR #2090, Daniel 4161297307. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N1o4KqT54Vp2zpakJ54sbU
…talog copy kotlin-daemon-compiler in libs.versions.toml was a second copy of KOTLIN_VERSION, and the pin half of quickBuildDistJarCheck existed only to keep the two equal. :quickbuild:daemon now asks for kotlin-build-tools-api, -impl and the Compose plugin at KOTLIN_VERSION, so the tie holds by construction. The catalog entries keep their coordinates without a version, and the pin check and its docs go. Review: PR #2090, Daniel 4161297318. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N1o4KqT54Vp2zpakJ54sbU
Fixed; see the inline thread. 81ba158 checks the decoded
Fixed in 1b01fb5: the skip also requires every listed jar to pass
Declined. They already run in sequence: the distribution is replaced only by first-run setup (
Every production function this PR touches now has KDoc; b2f88e8 adds the one that lacked it (
A bot overwrote it; restored.
Intended, no change. It runs only where the filesystem refuses a symlink, and there it stores about what the daemon stored before this PR. The APK saving holds either way, and the A56 run made 9 links, no copies. |
The on-device Gradle distribution has always carried one: 8.14.3 bundled kotlin-compiler-embeddable 2.0.21, and 9.6.1 bundles 2.3.21. Quick Build's compile daemon shipped its own copy beside it, so the APK carried the same ~57 MB artifact twice at two versions that differ only in patch. Pin the daemon's compiler to the version the distribution embeds, drop it from quickbuild-daemon.zip, and link the distribution's copy into the daemon dir at stage time. The daemon jar's manifest Class-Path is unchanged -- it still names the jar, the file is still there, only its provenance moved. The host-side stageDaemon layout is untouched too, since it copies straight from runtimeClasspath, so the daemon's own tests and the corpus harness are unaffected. The link runs from stageDaemonIfNeeded, before the stamp is written. The skip test at the top of that function reads the stamp and the daemon jar, not the linked compiler, so a stamp written over a failed link would skip re-staging on every later call and leave the daemon without a compiler until the next install -- the stamp means a complete staging, and the link is part of one. quickbuild-daemon.zip: 61,954,394 -> 9,545,494 bytes. It sits in the APK uncompressed, so the APK should drop by the same ~52.4 MB. The pin is a separate catalog version rather than a move of the shared `kotlin` alias, which also compiles the IDE across ~60 modules; the compiler the daemon runs and the compiler that builds CoGo are different concerns. quickBuildCompilerVersionCheck fails the build if the two drift, because the failure it prevents surfaces on device as a NoClassDefFoundError partway into a compile. Left bundled: kotlin-reflect, stdlib, coroutines, gson, asm and build-tools-impl also appear in the distribution, but unlike the compiler they do not version-match (reflect 1.6.10 vs 2.3.21, coroutines 1.8.0 vs 1.10.2, asm 9.7.1 vs 9.9). About 4 MB for a behaviour change rather than a packaging one -- worth its own look, not this commit. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XTUVfxid5riL2T78piiKDE
AGP 9.3.1 refuses to configure on a Gradle older than 9.5.0, so every TestKit test that applied com.android.application died at plugin application -- 8 of them -- against a Gradle version two constants still named 8.14.3. AGP_VERSION_GRADLE_LATEST now reads GRADLE_DISTRIBUTION_VERSION instead of repeating it. Its comment already said it tracks the distribution the IDE bundles, and it had drifted once before for the same reason (8.6 stale against AGP 8.11), so deriving it is what stops the third time. AndroidIDEInitScriptPluginTest pins its own versions to span the supported range deliberately, so that pair moves rather than gets derived: 8.14.3 is now below AGP's floor and is replaced by 9.5.1, with the bundled 9.6.1 as the upper end. Same intent -- both ends of the range, not just the middle. :gradle-plugin:test 132 passing, 6 skipped (the pre-existing LogSender bucket). Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XTUVfxid5riL2T78piiKDE
The link is the half of ADFA-4931 that runs on device, and it had no test. Its bad failure mode is silence: if it stages nothing, the daemon jar's manifest Class-Path names a jar that is not there and the first compile dies deep inside the Build Tools API. Five tests now pin it -- content readable at the expected name, the name carrying the pinned version, a link rather than a copy so the bytes are not paid twice, and the missing-distribution case failing loudly with both the distribution and the jar name in the message. All five go red against a no-op link. linkKotlinCompiler takes the dists root as a defaulted parameter purely so a test can point at a fake distribution; production callers are unchanged. The dependency comment was also wrong in a way worth correcting rather than leaving: it justified keeping kotlin-daemon-client, a module the 2.3.21 graph does not resolve at all. Re-tested both suspicious deps by exclusion on the current graph. kotlin-daemon-embeddable is what actually carries CompileIterationResult. And kotlin-reflect, which reads like a stale 1.6.10 pin, is nothing of the sort -- it is what the 2.3.21 compiler's own POM declares, and excluding it fails every daemon test that runs a real compile with NoClassDefFoundError. Both findings are now in the comment so the next person to eye those 3 MB has the evidence instead of the guess. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XTUVfxid5riL2T78piiKDE
The compiler was the expensive one, but it was not the only duplicate. The on-device Gradle distribution also ships kotlin-stdlib, kotlin-build-tools-impl, kotlin-daemon-embeddable and kotlin-script-runtime at exactly the versions the daemon resolves - byte for byte, same artifacts from the same Maven coordinates. Link those too and the daemon zip drops from 9,545,494 to 6,167,300 bytes. The list moves out of the code and into one table. quickBuildDistLinkedJars names the jars and pins the SHA-256 each has in gradle-9.6.1/lib; the zip task excludes those names, a generated dist-linked-jars.txt travels with the zip, and the stager links whatever that file names. So the build's exclusion list and the device's link step are the same list, and adding a jar is one line rather than two edits that can disagree. quickBuildDistJarCheck earns its keep by failing three ways, each watched go red before this landed: a jar whose bytes drift from the distribution's copy, a name that is not on the daemon's runtime classpath (which would exclude a jar nothing puts back), and a distribution version that has moved past the one the hashes were read from. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XTUVfxid5riL2T78piiKDE
…hree deps gson, asm and the coroutines the compiler drags in were each one minor version away from the copy gradle-9.6.1 ships. Moved onto the distribution's versions and they link like the rest, taking the daemon zip from 6,167,300 to 4,371,879 bytes - 4,371,879 against 61,954,394 where ADFA-4931 started. The versions are not ours to pick any more, so the build says so. gson gets its own catalog entry rather than sharing the app-wide google-gson, because an app-side bump would otherwise silently break the link; asm has no other consumer, so its existing entry moves and carries the reason; coroutines arrives transitively and is pinned by a constraint naming the -jvm platform module, since the compiler depends on that directly and a constraint on the KMP root does not govern it. That last one is worth recording because the gate caught it: the first attempt constrained the root, resolution stayed on 1.8.0, and quickBuildDistJarCheck refused the build rather than letting a jar be excluded that nothing would put back. Suites after the bump: 2,031 tests, 0 failures - protocol, core and daemon included, since gson sits on the wire codec between them. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XTUVfxid5riL2T78piiKDE
The offline Maven repo and the Gradle distribution are harvested separately and overlap by construction: a user project resolves its Kotlin plugin from the repo, and the distribution embeds the same Kotlin to run its own builds. Once the toolchain bump lands they will hold the same kotlin-compiler-embeddable, ~60 MB of identical bytes on a phone that has little to spare. DistJarDeduplicator runs from BaseAssetsInstaller.postInstall - the one hook both installers reach after everything is extracted, and where the build-tools exec bits are already fixed up - and replaces a Maven-repo jar with a symlink to the distribution's copy. Identity is the bytes, never the name. The two stores version independently, so a matching file name proves nothing, and linking a same-named jar that is not the same jar would break a user's build a long way from the cause. Size is only a pre-filter; the decision is SHA-256. That is also what makes this safe to land before the regenerated Maven repo exists: today it collapses three small jars totalling 808,072 bytes, and it will collapse the compiler the moment the bytes match, with no further change here. Two deliberate refusals to fail. A missing distribution, an unreadable jar, or a filesystem that refuses symlinks all leave the duplicate on disk - this buys space, not correctness, and no one should lose an install over it. And the link is built beside the file and moved over it, so a failure part-way leaves the original copy exactly where it was. JarLinks now holds the symlink attempt the deduplicator shares with QuickBuildArtifactStager. Only the attempt: the stager must end up with the bytes, so it copies when it cannot link, while the deduplicator already has them and leaves the copy alone. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XTUVfxid5riL2T78piiKDE
QuickBuildArtifactStagerDistLinkTest calls linkDistJars directly, so its five
tests stayed green through a rebase that left the production call unreachable
behind a `return`. They pin the link; nothing pinned the wiring. The new test
asserts from stageDaemonIfNeeded -- the only path that reaches the link in
production -- that the listed jar is readable in the daemon dir afterwards.
Watched go red with the call removed:
java.io.FileNotFoundException: .../home/daemon/
kotlin-compiler-embeddable-2.3.21.jar (No such file or directory)
One of ten, which is the point: the other nine pass either way.
stageDaemonIfNeeded takes gradleDists for the same reason linkDistJars
already did -- Environment.GRADLE_DISTS is a mutable static that is null until
Environment.init() runs, so an off-device test has nowhere to link from. The
existing staging tests needed it once the call moved onto their path; they
were passing only because the call was dead.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XN91S41dghWHoXAoWhJAnm
Six tests, no production code touched. Branch coverage on the lines this change adds goes 35/44 (79.5%) to 42/44 (95.5%); line 85/101 (84.2%) to 94/101 (93.1%). Each was watched failing first against a mutant confirmed applied by diff and confirmed compiling before the result was read - a mutant with invalid syntax prints no result line, and one whose edit silently did not apply prints a green one, and both read as "the tests do not catch this". The two branches left uncovered are named with their reasons. One is the tableswitch default arm of the compiler-generated invokeSuspend in BaseAssetsInstaller - the "call to 'resume' before 'invoke'" guard Kotlin emits for every suspend function, which no test can reach. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XN91S41dghWHoXAoWhJAnm
…against quickBuildDistJarCheck claimed to pin "the SHA-256 each has in gradle-9.6.1/lib" and to fail when the two sources were not "the same bytes". It did neither for the compiler: it hashed :quickbuild:daemon's Maven runtimeClasspath, and the pinned value for kotlin-compiler-embeddable was that same Maven jar. Both sides moved together, so the check could not observe the one mismatch it existed to find. They do not match. The distribution repacks kotlin-compiler-embeddable: its copy is 54,553,624 bytes (72ea34af...) against Maven's 59,720,376 (d3e70fb0...) at the same 2.3.21. Its zip entry is stamped 2026-09-12 where every other lib entry carries Gradle's canonical 1980 stamp. The other seven pinned jars are byte identical between the two sources, so the gate was honest for those and blind for the one that matters - the 57 MB one the ticket is about. The task now opens assets/gradle-9.6.1-bin.zip and hashes each jar as gradle-9.6.1/lib ships it, which is what QuickBuildArtifactStager links and what the daemon loads. All eight pins are re-derived from a fresh download of the asset URL, verified byte identical to the local copy. The Maven end is still checked, for the name rather than the bytes. That name is what quickBuildDaemonZip excludes, so a version bump that renamed a jar would leave the exclusion matching nothing and silently restore the copy the link replaces. Byte equality between the two ends is not a property that holds, so asserting it guards nothing; what makes the substitution safe is the version pin, which is asserted as before. A release build fetches the brotli-encoded distribution and never materialises this zip. That path now logs "UNHASHED - 0 of 8 linked jars read" with the reason and the command that fixes it, rather than sharing an output token with a real pass. Watched red before green: restoring the old Maven pin fails the task with "gradle-9.6.1/lib/kotlin-compiler-embeddable-2.3.21.jar has drifted from its pin ... pinned d3e70fb0..., gradle-9.6.1-bin.zip now ships 72ea34af... (54553624 bytes)" - the value the old gate passed with. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GwtUCGy8fKaSzu2uuUEUPY
…second copy The Quick Build daemon zip carried its own copy of the Kotlin compiler and seven other jars that the on-device Gradle distribution already ships. Both live under ANDROIDIDE_HOME, so the stager can link the distribution's copies into the daemon dir under the names the daemon's manifest Class-Path expects, and the zip can leave them out. The debug v8 APK drops 57.6 MB, 254.0 MB to 196.4 MB. Two build-time checks replace the shipped bytes: the daemon's Kotlin must equal the distribution's, and every linked name must exist in both the distribution archive and the daemon classpath. A rename or a version bump that would break the link fails the build rather than surfacing on device as a NoClassDefFoundError partway into the user's first compile. No hashing. An earlier revision pinned SHA-256 for each linked jar; the hash input was optional, so release builds skipped the comparison entirely, and nothing at runtime ever read a hash. DistJarDeduplicator and JarLinks are removed. The deduplicator saved 0.8 MB of on-device storage for ~200 lines plus tests, which is not worth its weight beside the 57.6 MB the link saves; JarLinks had one caller left once it went, so its body is inlined into QuickBuildArtifactStager. Comments in the touched build files were shortened to the repo's bar in the same pass: 1-2 sentences of description, one line per param. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GwtUCGy8fKaSzu2uuUEUPY
ADR 0016 and the quickbuild docs described the Quick Build daemon as shipping its own Kotlin compiler, which stopped being true with the jar linking. Each is a line or two, at the point where the claim is made. The daemon README's exclusion bullet named kotlin-daemon-client, which the 2.3.21 dependency graph no longer resolves at all. It now names the two modules this branch re-tested by exclusion, matching the note in build.gradle.kts. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GwtUCGy8fKaSzu2uuUEUPY
Code review found that linkDistJars could destroy the on-device Gradle distribution. createSymbolicLink refuses an existing path, the broad catch swallowed that, and the copy fallback then opened the stale link for write -- which truncates the distribution's jar, not the daemon's copy. Every Gradle build on the device breaks, and the stamp records it as success. Deleting the target before linking removes the class of failure. The rest is the same review's smaller findings: - link failures leave no stamp, now covered by a test that goes red when the stamp is written first - names read from dist-linked-jars.txt must be bare file names, the guard extractDaemonZip already applies twelve lines up - a missing list and an empty one now say which one happened - the copy fallback is reached by injecting the link operation, so the test named for a symlink-less filesystem tests one - the daemon zip's exclusion is scoped to the classpath it is about - two docs bullets said the daemon re-extracts every provision; it re-extracts when the installed APK changed Tested: 304 app quickbuild tests green, spotlessCheck green. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GwtUCGy8fKaSzu2uuUEUPY
Nothing ordered quickBuildDistJarCheck after assetsDownloadDebug, so a build that brings in a new distribution could check the old archive, or find none and pass. The release download gets the same edge, since the check now reads the release archive too. Review: PR #2090, Daniel 4161297297. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N1o4KqT54Vp2zpakJ54sbU
The coroutines, gson and asm names repeated the versions in libs.versions.toml, so a catalog bump needed a second edit here that only the jar check would ask for. Building the names from the catalog entries the daemon resolves keeps one copy. Review: PR #2090, Daniel 4161297312. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N1o4KqT54Vp2zpakJ54sbU
A matching stamp used to mean daemon/ was self-contained. Its linked jars now point into the Gradle distribution, which the assets installers delete and re-extract, so the stamp alone could skip staging over a broken link and leave the daemon to fail mid-compile. The skip now also requires every name in dist-linked-jars.txt to pass isFile() in the daemon dir. Review: PR #2090, Daniel 4161297302. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N1o4KqT54Vp2zpakJ54sbU
The daemon resolved kotlin-reflect 1.6.10, which kotlin-compiler-embeddable's POM pins, so the zip carried its own older copy while the distribution ships 2.3.21 in lib/. A constraint now takes it to KOTLIN_VERSION and the jar joins the linked list. The full :quickbuild:daemon suite passes on 2.3.21 (234 of 234, 0 skipped). Review: PR #2090, Daniel 4161297307. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N1o4KqT54Vp2zpakJ54sbU
…talog copy kotlin-daemon-compiler in libs.versions.toml was a second copy of KOTLIN_VERSION, and the pin half of quickBuildDistJarCheck existed only to keep the two equal. :quickbuild:daemon now asks for kotlin-build-tools-api, -impl and the Compose plugin at KOTLIN_VERSION, so the tie holds by construction. The catalog entries keep their coordinates without a version, and the pin check and its docs go. Review: PR #2090, Daniel 4161297318. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N1o4KqT54Vp2zpakJ54sbU
…e debug zip quickBuildDistJarCheck read only assets/gradle-9.6.1-bin.zip, which release and CI builds never have, so they logged UNCHECKED and passed (Copilot r4159241283, Daniel r4161297674). It now also stream-decodes the release .br, fails a release build whose .br is absent, and logs NOT PACKAGED for a debug build with no archive, whose device gets the distribution from the separate assets zip. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N1o4KqT54Vp2zpakJ54sbU
The daemon zip extracts to 1.9 MB now that the distribution supplies the Kotlin jars, and the doc ran to two long paragraphs (Daniel r4161297314). It is two sentences now, and installStamp says for itself why it uses lastUpdateTime. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N1o4KqT54Vp2zpakJ54sbU
linkedJarsResolve's catch was the one path of the new skip check no test reached (JaCoCo 4/6 lines). The test deletes dist-linked-jars.txt under a matching stamp and expects a re-stage; with the catch returning true it fails with "expected to be true". Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N1o4KqT54Vp2zpakJ54sbU
…names quickBuildDistJarCheck decided "this is a release build" from the task names on the command line, so a release variant reached through any other name (copyV8ReleaseQuickBuildDaemonZip, mergeV8ReleaseAssets, an abbreviation such as aV8R, or a bare assemble) packaged the daemon zip with the distribution unchecked and the build green. A release-only gate task now fails when the .br is absent, and every release variant's copy of the daemon zip depends on it, so the release path is wired rather than inferred. requireLinkedJars gains a one-line KDoc. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N1o4KqT54Vp2zpakJ54sbU
… release The gate keyed on buildType == "release", but the instrumentation build type also bundles assets/release, so copyV8InstrumentationQuickBuildDaemonZip packaged with no distribution checked and the build stayed green. The gate now uses hasBundledAssets, the same test AndroidModuleConf uses to add assets/release to a variant, made public for this. The gate is renamed quickBuildBundledDistGate to match. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N1o4KqT54Vp2zpakJ54sbU
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ADFA-4931
The debug v8 APK shrinks by 60.3 MB, from 256.7 MB to 196.4 MB. Every install used to ship two Kotlin compilers, and Quick Build now links to the Gradle distribution's copy instead of keeping its own.
That copy lacks Kotlin/JS and Kotlin/Wasm, which CoGo does not target.
flowchart LR subgraph before["Before: two compilers"] d1["Gradle distribution<br/>kotlin-compiler-embeddable"] q1["quickbuild-daemon.zip<br/>62.0 MB"] end subgraph after["After: one compiler, linked"] d2["Gradle distribution<br/>kotlin-compiler-embeddable"] q2["quickbuild-daemon.zip<br/>1.7 MB"] d2 -- "symlinked at provision time" --> q2 end before --> afterWhat to review
QuickBuildArtifactStager.linkDistJars: check the copy fallback used when the device refuses a symlink.QuickBuildArtifactStagerDistLinkTest: checks that staging actually creates the links.app,gradle/libs.versions.toml,build-info):quickBuildDistJarCheckfails the build if the Gradle distribution the build packages lacks a linked jar, and a release or instrumentation build, which bundles that distribution, fails if it is absent. A debug build that packages none, as on CI, logs NOT PACKAGED.Tested at
f79bedd053f6ef914653): warm-edit reloads take 2.5 s (Kotlin), 1.1 s (resource) and 95 ms (asset).f6ef914653): 24 of 25 Quick Build cases pass on the A56. The 25th, the Compose case, couldn't run that day because no Compose project on the phone could sync offline. It passed in the follow-up tests below.Follow-up device tests on 2026-10-02 used debug and release builds of
f79bedd053, offline on the A56:🤖 Generated with Claude Code
https://claude.ai/code/session_01N1o4KqT54Vp2zpakJ54sbU