ciach 0.7.1

Dead code detector for Dart and Flutter. Finds unused classes, functions, methods, fields and enum values that nothing references, and removes them.

0.7.1

• Restructure the README. (#162)
• A generic class or mixin that only with or implements clauses name is now reported and removed like any other. A type named only in the type arguments of such a class or mixin in a clause, like T in with M<T>, is reported in the same run, except with --no-transitive. (#153)
• Report unused unnamed extensions and their members in an exported package and with --no-public, and label them (private). (#160)
• Report unused call methods. Before, every call method was skipped, also one that nothing calls. (#151)
• With exported-packages, a member used in unused code and in live code is no longer reported as unused or listed under "Recovered references". (#149)
• Scans are faster: the check for uses that the reference search missed takes less time. On a large package, it went from about 110 to 30 seconds. (#139)
• --remove now lists the files that it deleted and the declarations that it left empty one per line. Before, it listed them on one line, separated by commas. (#136)
• --help and README.md no longer say that a declaration used only from files that --exclude skips is reported. The references in those files count, as they did before. (#136)

0.7.0

• Breaking: --overrides, --operators, --report-tojson and --unused-union-members are now one option, --also, and --generated-suffix is replaced by --generated-glob. --fail-public is gone. Using a removed option is an error that says what to use instead. See MIGRATION.md. (#105)
• Breaking: --transitive is now on by default: a helper called only by dead code, and a dead cycle, are reported in the same run instead of after a removal and a second run. See MIGRATION.md. (#131)
• With --unused-translations, ciach reports only the unused messages of the gen-l10n template file. Before, it also reported the code gen-l10n writes around them, such as the delegate class, and said to remove it from the ARB file. (#134)
• An unused mixin is reported as a mixin, not a class, and a member of a private class as private, not public. (#134)
• With -v, an error you can fix yourself, such as a package without pub get, no longer comes with a stack trace that reads like a crash. (#134)
• ciach no longer runs your lint rules and analyzer plugins, which it doesn't need. On a Flutter app with an analyzer plugin, a run now takes about a third less time and much less memory. Your files and what dart analyze reports stay the same. (#132)
• --remove now lists the // comments it leaves right above removed code, so you can check whether they still belong. It also deletes an // ignore:, // expect_lint: or // cspell:disable-next-line comment above or at the end of a removed declaration, which before stayed and applied to the next line. (#129)
• ciach now reports an unused class, mixin, extension, extension type or enum once, instead of also listing each of its members. The same goes for a class or mixin that only with or implements clauses use. A used enum whose values are all unused is reported once and left in place. (#121)
• ciach now reports a class or mixin whose members are all unused and that only with or implements clauses use, and --remove deletes it and removes it from those clauses. When other code still uses such a type, --remove keeps it empty and lists it in the summary; before, it left it empty without saying so. (#118)
• --remove no longer breaks a field or variable statement with a comment inside, such as int a = 1, /* note */ b = 2;. Before, it left int ; behind, or kept a declarator it couldn't cut without saying so. (#128)
• New exported-packages option: list the packages that code outside the analysis imports, such as one published to pub.dev, and ciach doesn't report what other packages can import from them. --exported is gone. (#105)
• Unused translations are reported by default when an l10n.yaml is present. (#105)
• An analyzer plugin that analysis_options.yaml loads by path, and the files that flutterfire configure writes, are no longer reported as unused. (#105)
• With -v, ciach suggests an --analysis-root when another package in the repository uses the scanned one through a path: dependency. (#105)
• --help lists the options in groups. (#105)
• If a class, enum, mixin or extension type is mentioned only in doc comments and has unused members, ciach now reports the type once, and --remove leaves it alone. Before, ciach reported each unused member, and --remove deleted them and left an empty type. (#116)
• In entry-points, you now write a constructor the way the report shows it: MyWidget.new or MyWidget.named. Before, MyWidget.new matched nothing and named constructors could not be listed at all. MyWidget.MyWidget is now an error. (#117)
• An entry-points rule for a class or extension type now also keeps its unnamed constructor. Before, ciach still reported that constructor as unused. Named constructors and other members are still checked. (#115)
• Add // ciach:ignore comments that keep code from being reported or removed. Put one above a declaration or at the end of its line, put // ciach:ignore-start and // ciach:ignore-end around a range, or keep a whole file with // ciach:ignore-file. (#104)
• If a scanned package hasn't had dart pub get, ciach now stops with exit code 2 and lists that package. Before, it reported code used by that package as unused. (#120)
• Stop reporting test calls as declarations. test(...), group(...) and calls to @isTest functions such as testWidgets were listed as unused or doc-only, and --remove could delete them. (#119)
• Add --format values azure and teamcity, the default on their service as github is on GitHub Actions, and sarif, checkstyle and gitlab (Code Quality) reports for other tools to import. (#103)
• On GitHub Actions, GitLab CI and Azure Pipelines, report paths start at the repository root wherever ciach runs from, not only when it runs there. (#103)
• On CI, detected from the environment, --set-exit-if-changed and --verbose default to on, progress to off, and on GitHub Actions --format to github; --[no-]ci overrides the detection. (#101)
• Report files with nothing but comments and library, import or part of directives, in an "Empty files" section. They count toward --set-exit-if-changed, and --remove deletes them with the directives naming them. An empty conditional-import variant is reported for removal by hand. (#100)
• --transitive also reports dead cycles: declarations that only reference each other. (#87)
• A dead StatefulWidget whose State is used elsewhere (say, by a GlobalKey) is report-only: --remove deleted the widget and left State<Widget> naming a missing type. A State in another file is now removed with its widget, instead of being left behind the same way. (#87)
• Add --no-exported (exported: false): skip only declarations other packages can import. (#85)
• Resolve package: URIs through .dart_tool/package_config.json, as Dart does, instead of the pubspecs under the root. --remove no longer keeps an emptied file because a path dependency outside the root has a file at the same lib/ path. (#92)
• Skip entry points and generated files without any configuration:
  • Entry points: builder factories, Flutter plugin classes, dart_frog handlers, Serverpod endpoints, analyzer and custom_lint plugins, and @JSExport and @reflectiveTest members.
  • Generated files: build_runner and gen-l10n output, and more kinds of generated-code banners (protoc, Pigeon, …).
  • New flags: --no-project-config and --unused-translations. (#86)
• A top-level getter named only in a show or hide combinator is no longer reported, so --remove no longer leaves the combinator naming nothing. (#93)
• Namesakes in the variants of a conditional import are checked together. Before, everything outside the default variant was reported, and --remove broke the build on the other platforms. (#94)

0.6.0

• Breaking: FinderOptions.onProgress is removed; ciach logs through package:logging. (#78)
• Recommend dart install ciach over dart pub global activate in the README and on the website. (#83)
• A failed analysis server request no longer stops the run: the affected code is kept and listed under "Not analyzed". The result goes to stdout, the log to stderr, with more color. (#78)
• Require glob 2.2.0. On 2.1.x, **/flutter_test_config.dart did not match a flutter_test_config.dart at the package root, so its testExecutable was reported as unused. (#75)
• Add --generated-glob <glob> (and generated-glob: in ciach.yaml): treat matching files as generated, so their references count but nothing in them is reported or removed. For output a suffix can't pick out, like flutter gen-l10n's lib/l10n/**, which has neither a suffix nor the banner. Unlike --exclude, the files are still opened. (#76)
• A member used only through an override, from a file that doesn't import the member's library, is no longer reported (nor deleted with --remove). (#79)
• Checking a dead member's overrides is much faster: they share its references, so they are no longer queried one by one. (#77)
• Add --transitive (and transitive: in ciach.yaml): also report declarations referenced only from other findings, which used to take another run after --remove. Each one names the findings that reference it (onlyReferencedFrom in -f json). Off by default. (#72)
• A reference from inside a declaration's own span no longer keeps it alive, for every kind: a function or method called only by itself is now reported. Classes already worked this way. (#67)
• FinderOptions normalizes rootPath and analysisRootPath, and a run throws an ArgumentError when the analysis root doesn't contain the scanned one, so a library caller gets the check the CLI already had. The constructor is no longer const. (#64)
• --remove deletes a dead member's overrides along with it, so no @override is left overriding nothing. A member is reported but not removed when one of its overrides can't be deleted: a declaring parameter of a primary constructor, or one in a file the run didn't scan. (#63)
• Read a field declarator's doc comment and annotations from the statement it belongs to. b in @override final int a, b; reported none of its own, so it was checked where an @override member is skipped. (#63)
• Add --analysis-root <path> (and analysis-root: in ciach.yaml): count references from a directory wider than the scanned package, so a sibling package that depends on it by path: keeps what it calls alive. What is scanned, reported and removed is unchanged. A pub workspace needs no setting. (#61)

0.5.0

• Read declarations from the analysis server's outline instead of the source text. --remove deletes a declaration's doc comment and annotations as the analyzer delimits them: a multi-line annotation goes with it, a // comment above it stays. UnusedDeclaration gains fullRange. (#53)
• Read comments and annotations from the analysis server's semantic tokens. Dartdoc links in /** */ comments count as doc-only references, and @override and vm:entry-point are detected by annotation, not by text. (#54)
• Read the syntax around a reference from the analysis server's selection ranges instead of a built-in lexer. (#55)
• Ask the analysis server about a class's superclass before blocking the removal of its last constructor: a StatelessWidget subclass is no longer blocked on super.key. The built-in Dart lexer is gone. (#56)

0.4.5

• Stop reporting (and removing) testExecutable in a flutter_test_config.dart, which only the flutter test bootstrap calls. (#51)
• Add entry-points to ciach.yaml: {name, glob} rules for a project's own tool-called declarations. A member rule keeps its type; --verbose names each skipped entry point.
• Check extensions and extension types, which were invisible before: a dead one is removed whole rather than having its members stripped and the shell left behind. -k extension and -k extension-type select them, and members report as Extension.member. (#50)
• --remove deletes a file it leaves with only library/import/part of lines and drops the directives naming it; removeDeclarations returns a RemovalResult. (#50)

0.4.4

• Fix a compiled ciach (dart install) spawning itself as the analysis server and failing every run. (#44)
• Show the analysis server's exit code and stderr when it dies.

0.4.3

• Add --version, and show the version in the --help header. The analysis server now sees the real version instead of 1.0.0.

0.4.2

• Support Dart 3.13 primary constructors: a dead constructor or declaring parameter in a class header is report-only, since --remove cannot delete part of a header.
• Stop reporting a primary constructor's this : … body part as a Class.this finding, and a dead class's declaring parameters separately from the class.
• Count only what --remove actually deletes in its summary.

0.4.1

• Fix a constructor reached only through a dot shorthand (.new(…)), from a file that never names its class, being reported as unused.

0.4.0

• Add config file support: any option can be set in a ciach.yaml in the package root, and the command line overrides it. --config <path> reads one from elsewhere, --no-config ignores it.
• Add -v, --verbose to narrate a run on stderr: config used, every setting and the layer it came from, scan phases, what --remove touches. Supersedes --progress.
• Fix a comment mentioning @override or vm:entry-point skipping the declaration below it. (#29)
• Add a secondary textDocument/definition check for zero-reference declarations, so valid uses the reference search misses no longer produce false 'unused' reports. (#26)
• Add --[no-]fail-public (default on): --no-fail-public still reports unused public declarations but excludes them from --set-exit-if-changed, so CI fails only on unused private ones. (#23)
• Document the --unused-union-members, --report-tojson, --generated-suffix, and --help options in the README, which existed in the CLI but were missing from the options table. (#22)

0.3.0

• Lower the minimum Dart SDK constraint from ^3.12.2 to ^3.10.0. (#20)
• Never report a toJson() as unused; jsonEncode(obj) calls it by dynamic dispatch, with no source-level reference for the search to see. Opt back in with --report-tojson. (#17)
• Add --generated-suffix (repeatable) to treat extra filename suffixes as generated, on top of the built-in set (*.g.dart, *.freezed.dart, …). (#13)
• Open generated files during analysis so a declaration referenced only from generated code is no longer misreported as unused. (#13)
• Fix --remove corrupting compact single-line enums (enum E { a, b, c }) when removing one or more values. (#11)
• Fix --remove deleting the leading doc/annotation comment and header when removing a value from a compact single-line enum. (#11)
• Report a whole dead class as unused, not just its constructor, so --remove deletes the class instead of stranding it. Detection is conservative: any reference from outside the class keeps it alive. (#10)
• Remove a dead StatefulWidget together with its paired private State subclass, so State<DeletedWidget> never dangles. (#10)
• Add remove-safety guards: --remove skips (but still reports) any removal that wouldn't compile — emptying a still-referenced enum, dropping a sole constructor with final fields, or dropping a super-forwarding constructor. (#10)
• Add opt-in --unused-union-members to report sealed types that are only pattern-matched and never constructed. Report-only: --remove never deletes them. (#10)
• Skip call methods by default; implicit-call references (obj(...)) aren't resolvable, so they were always misreported as unused. (#14)
• Report an unused private constructor like any other dead declaration (and remove it with --remove); a sole zero-parameter ClassName._() also gets a hint suggesting abstract final class to keep a static-only class non-instantiable. (#14)
• Fix enum values reached only through .values iteration being reported as unused. (#15)
• Fix unused enum values being reported under the enum kind instead of enum-value. (#12)
• Don't report deserialized freezed union variants as unused; the generated fromJson builds the concrete subclass directly, bypassing the redirecting factory. (#16)

0.2.0+2

• Update the README. (#6)

0.2.0+1

• Add pub.dev topics and issue_tracker metadata for discoverability. No code changes. (#5)

0.2.0

• Add --remove to delete unused declarations from source after reporting them, with a confirmation prompt; --remove --force skips the prompt. (#4)
• Skip operator overloads (operator +, operator ==, …) by default — the analysis server can't resolve infix operator syntax back to the declaration, so a used operator was always reported as unused. Pass --operators to include them anyway. (#4)
• Report declarations referenced only from a dartdoc [Xxx] comment link as a separate, informational "doc-only" category (in text, json, and github output) instead of hiding them entirely. Doc-only findings are never deleted by --remove. (#4)
• Clarify installation instructions: global activation vs. adding ciach as a dev dependency. (#4)

0.1.0

Initial implementation. (#1)