Can Tslint be utilized to restrict the usage of Typescript's await feature? If not, are there alternative linters available for this purpose?
Can Tslint be utilized to restrict the usage of Typescript's await feature? If not, are there alternative linters available for this purpose?
This solution involves using a custom rule that serves my specific needs effectively.
To implement this solution, begin by creating a file (for example, noAwaitRule.ts) and compile it using tsc.
import * as ts from "typescript";
import * as Lint from "tslint";
export class Rule extends Lint.Rules.AbstractRule {
public static FAILURE_STRING = "await statement forbidden";
public apply(sourceFile: ts.SourceFile): Lint.RuleFailure[] {
return this.applyWithFunction(sourceFile, walk);
}
}
function walk(ctx: Lint.WalkContext<void>) {
return ts.forEachChild(ctx.sourceFile, function cb(node): void {
if (node.kind === ts.SyntaxKind.AwaitExpression) {
const { expression } = node as ts.AwaitExpression;
const keywordStart = expression.pos - "await".length;
ctx.addFailure(
keywordStart,
expression.pos,
Rule.FAILURE_STRING,
Lint.Replacement.deleteFromTo(keywordStart, expression.getStart(ctx.sourceFile)),
);
}
return ts.forEachChild(node, cb);
});
}
If your file resides in a sub-directory (e.g., tslint-rules), include it in the tslint.json under `rulesDirectory`:
"rulesDirectory": [
...,
"tslint-rules"
],
Additionally, in the tslint.json file, add the new rule - following naming conventions, it would be named no-await:
"rules": {
...,
"no-await": true
}
A special thanks to user Amy for guiding me in this direction.
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