@vlr/bucket-gen

This generator creates index.ts files.

usage convention

It is recommended to create index file only for your types and interfaces, never for the code.
For example, I use following naming convention for code.
user.type.ts - file containing interface User {...}, which describes BL level entity.
user.model.ts - file containing interface UserModel {...}, which describes REST API level entity.
user.service.ts - file containing class UserService.
...and so on
And then I generate buckets only for following file types: type, model, const, enum, ctor

const and enum files are self explanatory and ctor files are generated by @vlr/type-constructor-gen

usage

import { generateBuckets } from "@vlr/bucket-gen";
import { transformRange } from "@vlr/gulp-transform";

const options = { lineFeed: "\n", quotes: "\"", aliasMap: {} };

gulp.task("generate-buckets", function () {
  const types = ["type", "model", "ctor", "const", "enum"];
  const files = types.map(type => `${settings.appPath}/**/*.${type}.ts`);
  return gulp.src(files)
    .pipe(transformRange(files => generateBuckets(files, options)))
    .pipe(gulp.dest(settings.appPath));
});  

@vlr/gulp-transform gulp plugin is used for all my generators.
All fields in options are optional, linefeed and quotes are the symbols to use in the output file.
aliasMap option is irrelevant here.