@wrench/roll-typescript/es/project/create-project.js

plugin for bundling TypeScript with support of modular output and declaration bundle

import { findConfigFile, parseJsonConfigFileContent, ParseReportHost, readConfigFile } from "../host";
import { arrifyInput } from "../util";
import { Project } from "./project";
export function createProject(props, input) {
    const ts = props.typescript || require("typescript");
    const host = new ParseReportHost(ts);

    const configPath = props.tsconfig || findConfigFile(host);

    const json = readConfigFile(configPath, host);

    const entry = arrifyInput(input.input).map(host.getCanonicalFileName);
    json.include = [...entry];

    const pcl = parseJsonConfigFileContent(json, host, props.baseCompilerOptions);

    const options = Object.assign({}, pcl.options, props.compilerOptions);
    const project = new Project({
        ts,
        options,
        fileNames: pcl.fileNames,
        currentDirectory: host.currentDirectory,
        transformerFactory: props.transformerFactory,
    });
    return [
        project,
        new Set(entry.map(project.getCanonicalFileName)),
    ];
}