Deno linter

NOTE Very much work-in-progress

Supported rules

• banTsIgnore
• banUntaggedTodo
• constructorSuper
• defaultParamLast
• eqeqeq
• explicitFunctionReturnType
• forDirection
• getterReturn
• noAsyncPromiseExecutor
• noCaseDeclarations
• noCompareNegZero
• noCondAssign
• noDebugger
• noDeleteVar
• noDupeArgs
• noDupeKeys
• noDuplicateCase
• noEmpty
• noEmptyFunction
• noEmptyInterface
• noEval
• noExplicitAny
• noNewSymbol
• noPrototypeBuiltins
• noSetterReturn
• noSparseArray
• noThrowLiteral
• noUnsafeFinally
• noVar
• noWith
• requireYield
• singleVarDeclarator
• useIsNaN
• validTypeof

Ignores

Only single line ignores are supported:

// deno-lint-ignore noExplicitAny
function foo(): any {
  // ...
}

// deno-lint-ignore noExplicitAny explicitFunctionReturnType
function bar(a: any) {
  // ...
}

Example output

$ ▶ target/debug/dlint ../deno/std/http/server.ts ../deno/std/http/file_server.ts
(noEmpty) Empty block statement
 --> ../deno/std/http/server.ts:93:14
   |
93 |       } catch {}
   |               ^^
   |
(noEmpty) Empty block statement
 --> ../deno/std/http/server.ts:111:44
    |
111 |     while ((await body.read(buf)) !== null) {}
    |                                             ^^
    |
(noEmpty) Empty block statement
 --> ../deno/std/http/server.ts:120:41
    |
120 |   constructor(public listener: Listener) {}
    |                                          ^^
    |
(banUntaggedTodo) TODO should be tagged with (@username) or (#issue)
 --> ../deno/std/http/file_server.ts:5:0
  |
5 | // TODO Stream responses instead of reading them into memory.
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
(banUntaggedTodo) TODO should be tagged with (@username) or (#issue)
 --> ../deno/std/http/file_server.ts:6:0
  |
6 | // TODO Add tests like these:
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
(banUntaggedTodo) TODO should be tagged with (@username) or (#issue)
 --> ../deno/std/http/file_server.ts:137:0
    |
137 | // TODO: simplify this after deno.stat and deno.readDir are fixed
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
(noEmpty) Empty block statement
 --> ../deno/std/http/file_server.ts:155:16
    |
155 |     } catch (e) {}
    |                 ^^
    |
Found 7 problems