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ADFA-3021: Format Kotlin code with ktfmt - #2089
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The Kotlin language server never overrode formatCode, so Format code did nothing on .kt files. It now formats the whole file with ktfmt in the kotlinlang style. ktfmt links against the shipped kt-android jar instead of its own kotlin-compiler-embeddable. google-java-format and guava resolve to the copies the app already ships, and jna and ec4j (CLI only) are dropped, so the only new code is the ktfmt jar itself (about 300 KB of dex). ktfmt's Parser builds its compiler environment with PrintingMessageCollector and MessageRenderer.PLAIN_RELATIVE_PATHS. Those live in the compiler's cli-common module, which the kt-android jar does not include, so ktfmt failed with NoClassDefFoundError. lsp/kotlin now provides both under their upstream names. All other ktfmt references resolve against the shipped jars. If a later kt-android release adds them, the duplicate class fails the build and these two files go. A syntax error surfaces as a CodeFormatException carrying the line:column and parser message.
LSPFormatter now catches any Throwable from formatCode and reports it: a CodeFormatException flashes "Could not format the file: <reason>", anything else is logged and flashes a pointer to the IDE logs. The text is left as it was. Letting the failure reach sora is not an option. AsyncFormatter's thread catches only Exception, and does so outside its loop while it holds its ReentrantLock, so a throwing formatAsync kills the thread with the lock held. The next format then hangs silently, and the one after blocks the main thread in lock.lock() (ANR). An Error, such as a StackOverflowError on deeply nested code, would escape the thread entirely. The failure reporter is a constructor parameter so the test can capture it without an Activity.
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at
@lsp/kotlin/src/main/java/com/itsaky/androidide/lsp/kotlin/format/KotlinCodeFormatter.kt:
- Line 14: Update the parse-error position conversion in the KotlinCodeFormatter
catch block to account for ktfmt stripping a shebang line: use a two-line offset
when the original content starts with “#!” and retain the one-line offset
otherwise. Keep the column conversion unchanged.
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📒 Files selected for processing (11)
editor/src/main/java/com/itsaky/androidide/editor/language/LSPFormatter.kteditor/src/test/java/com/itsaky/androidide/editor/language/LSPFormatterTest.ktgradle/libs.versions.tomllsp/kotlin/build.gradle.ktslsp/kotlin/src/main/java/com/itsaky/androidide/lsp/kotlin/KotlinLanguageServer.ktlsp/kotlin/src/main/java/com/itsaky/androidide/lsp/kotlin/format/KotlinCodeFormatter.ktlsp/kotlin/src/main/java/org/jetbrains/kotlin/cli/common/messages/MessageRenderer.ktlsp/kotlin/src/main/java/org/jetbrains/kotlin/cli/common/messages/PrintingMessageCollector.ktlsp/kotlin/src/test/java/com/itsaky/androidide/lsp/kotlin/format/KotlinCodeFormatterTest.ktlsp/models/src/main/java/com/itsaky/androidide/lsp/models/CodeFormatException.ktresources/src/main/res/values/strings.xml
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ktfmt drops a leading #! line before parsing, so a syntax error in a script with a shebang was reported one line early.
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ADFA-3021
Format code now formats Kotlin files with ktfmt (kotlinlang style). Option A from the ticket discussion.
PrintingMessageCollectorandMessageRenderer, which ktfmt's parser needs.lsp/kotlinprovides both under their upstream names.Could not format the file: 3:12: Expecting ')', instead of silently doing nothing.LSPFormattercatches the failure itself: a formatter that throws into sora'sAsyncFormatterleaves its lock held, which hangs the next format and ANRs the one after.Review by commit: the first commit is a Spotless reformat of
LSPFormatter.ktonly.