/** | |
* Utility for resolving a module relative to another module | |
* @author Teddy Katz | |
*/ | |
import Module from "module"; | |
/* | |
* `Module.createRequire` is added in v12.2.0. It supports URL as well. | |
* We only support the case where the argument is a filepath, not a URL. | |
*/ | |
const createRequire = Module.createRequire; | |
/** | |
* Resolves a Node module relative to another module | |
* @param {string} moduleName The name of a Node module, or a path to a Node module. | |
* @param {string} relativeToPath An absolute path indicating the module that `moduleName` should be resolved relative to. This must be | |
* a file rather than a directory, but the file need not actually exist. | |
* @returns {string} The absolute path that would result from calling `require.resolve(moduleName)` in a file located at `relativeToPath` | |
*/ | |
function resolve(moduleName, relativeToPath) { | |
try { | |
return createRequire(relativeToPath).resolve(moduleName); | |
} catch (error) { | |
// This `if` block is for older Node.js than 12.0.0. We can remove this block in the future. | |
if ( | |
typeof error === "object" && | |
error !== null && | |
error.code === "MODULE_NOT_FOUND" && | |
!error.requireStack && | |
error.message.includes(moduleName) | |
) { | |
error.message += `\nRequire stack:\n- ${relativeToPath}`; | |
} | |
throw error; | |
} | |
} | |
export { | |
resolve | |
}; | |