Hi Mirco, Unfortunately this is not a use case ESLint supports. Each rule is intentionally isolated for every other rule, and each run through a rule is isolated from all other runs. That’s to keep everything nicely decoupled which allows us to perform optimizations behind the scenes.
You might want to stick with TSLint for this particular use case. On Thu, Jun 6, 2019 at 12:53 AM Mirco Zeiss <[email protected]> wrote: > I'm currently converting my TSLint rule to ESLint. Here is the TSLint > version. > > import * as Lint from 'tslint' > import * as ts from 'typescript' > import en from '../app/src/i18n/en' > > // counter to keep track of already process files > // we need this to know when we are done, e.g. at the last file > let rootFileCount = -1 > > // temporary storage for all keys that are used in our components > const foundKeys = new Set() > > export class Rule extends Lint.Rules.TypedRule { > public static FAILURE_STRING = > 'could not find i18n key in english language file' > > public applyWithProgram( > sourceFile: ts.SourceFile, > program: ts.Program > ): Lint.RuleFailure[] { > // at start set the counter to the number of files > if (rootFileCount === -1) { > rootFileCount = program.getRootFileNames().length - 1 > } else { > // decrease counter for every file visited > rootFileCount -= 1 > } > > const failures = this.applyWithFunction(sourceFile, walk) > > // when done with files check if we have unused keys inside our > translation files > if (rootFileCount === 0) { > Object.keys(en).forEach(key => { > if (!foundKeys.has(key)) { > throw new Error(`i18n key "${key}" is not being used in any > file`) > } > }) > } > > return failures > } > } > > function walk(ctx: Lint.WalkContext<void>): void { > return ts.forEachChild(ctx.sourceFile, function cb(node: ts.Node): > void { > if (node.kind === ts.SyntaxKind.CallExpression) { > const callExpression = node as ts.CallExpression > if (callExpression.expression.getText() === 'i18n.transl') { > const arg = callExpression.arguments[0] > const argumentName = (arg as ts.Identifier).text > if (!en[argumentName]) { > ctx.addFailureAtNode(node, Rule.FAILURE_STRING) > } > foundKeys.add(argumentName) > } > } > return ts.forEachChild(node, cb) > }) > } > > > What does it do? > It goes through all my files and looks for `i18n.transl('foo')`. We use > language files which look like this: > > // en.js > module.exports = { > foo: 'foo in english' > } > > // de.js > module.exports = { > foo: 'foo in german' > } > > > The rule should find keys inside our language files that we never use in > our app. Let's say our language files look like this > > // en.js > module.exports = { > foo: 'foo in english', > bar: 'bar in english' > } > > // de.js > module.exports = { > foo: 'foo in german', > bar: 'bar in german' > } > > > But `i18n.transl('bar')` is never used. > > My problem is: How do I know when ESLint is done with all my files? This > would be the chance to compare the real language files with all occurrences > found in the app. In TSLint I used `program.getRootFileNames().length` to > get the total number of files which are being processed. Then I simply > counted down and at `0` I compared the language file `en` with my temporary > Set `foundKeys`. > > I know about the `Program` and `Program:exit` hooks but they are only per > file. I need hooks for something `ESLint:start` and `ESLint:done`. > > I also looked at all the existing rules but couldn't find any hints. They > all work on single files and not with multiple files. > > Any ideas? I'm stuck. Thank you! I also asked the question at Stack > Overflow > https://stackoverflow.com/questions/56461061/how-does-my-rule-know-when-eslint-is-done-with-all-files > but > no feedback so far. > > -- > You received this message because you are subscribed to the Google Groups > "ESLint" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/eslint/78fdc2a3-fa23-47bc-8390-5f286676be69%40googlegroups.com > <https://groups.google.com/d/msgid/eslint/78fdc2a3-fa23-47bc-8390-5f286676be69%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- ______________________________ Nicholas C. Zakas @slicknet Author, Principles of Object-Oriented JavaScript <http://amzn.to/29Pmfrm> Author, Understanding ECMAScript 6 <http://amzn.to/29K1mIy> -- You received this message because you are subscribed to the Google Groups "ESLint" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/eslint/CAOkd9hmqezSDEhEUGQhV-vzhZTG1jJ2b5YgeLbvQ%2BFOfWLwicw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
