Invalid source file for a.pass.ts

[unional]

gulp-tslint version: 7.1.0
tslint version: 5.2.0
Operating system: OSX

Example gulp configuration (if applicable):
With type-checking

function positiveTest(config) {
  var program = tslint.Linter.createProgram('./tsconfig.json')
  return gulp.src(`spec/${config}/*.pass.ts`)
    .pipe(gulpTslint({
      configuration: `./${config}.js`,
      formatter: 'verbose',
      program
    }))
    .pipe(gulpTslint.report());
}

Error console output:

Error:
Invalid source file: align.pass.ts. Ensure that the files supplied to lint have a .ts, .tsx, .js or .jsx extension.

    at Linter.getSourceFile (/Users/hwong/github/unional/tslint-config-unional/node_modules/tslint/lib/linter.js:207:23)
    at Linter.lint (/Users/hwong/github/unional/tslint-config-unional/node_modules/tslint/lib/linter.js:74:31)
    at /Users/hwong/github/unional/tslint-config-unional/node_modules/gulp-tslint/index.js:102:16

[panuhorsmalahti]

Do you get the same error when running tslint manually using the cli?

[unional]

Nope.

[panuhorsmalahti]

You should update to gulp-tslint 8, then try if the error persists.

[ishitatsuyuki]

I have reproduced the case. The trick here is that if you tried to lint something that isn't covered by tsconfig.json globs, it result in undefined source, triggering the failure. For my case, it was node_modules, so adjusting the glob deliberately to exclude irrelevant files solved the error.

[sompylasar]

Refs palantir/tslint#2208