40 lines
1.2 KiB
TypeScript
40 lines
1.2 KiB
TypeScript
import fs from "fs";
|
|
import { ono } from "@jsdevtools/ono";
|
|
import * as url from "../util/url.js";
|
|
import { ResolverError } from "../util/errors.js";
|
|
import type { JSONSchema, ResolverOptions } from "../types/index.js";
|
|
import type { FileInfo } from "../types/index.js";
|
|
|
|
export default {
|
|
/**
|
|
* The order that this resolver will run, in relation to other resolvers.
|
|
*/
|
|
order: 100,
|
|
|
|
/**
|
|
* Determines whether this resolver can read a given file reference.
|
|
* Resolvers that return true will be tried, in order, until one successfully resolves the file.
|
|
* Resolvers that return false will not be given a chance to resolve the file.
|
|
*/
|
|
canRead(file: FileInfo) {
|
|
return url.isFileSystemPath(file.url);
|
|
},
|
|
|
|
/**
|
|
* Reads the given file and returns its raw contents as a Buffer.
|
|
*/
|
|
async read(file: FileInfo): Promise<Buffer> {
|
|
let path: string | undefined;
|
|
try {
|
|
path = url.toFileSystemPath(file.url);
|
|
} catch (err: any) {
|
|
throw new ResolverError(ono.uri(err, `Malformed URI: ${file.url}`), file.url);
|
|
}
|
|
try {
|
|
return await fs.promises.readFile(path);
|
|
} catch (err: any) {
|
|
throw new ResolverError(ono(err, `Error opening file "${path}"`), path);
|
|
}
|
|
},
|
|
} as ResolverOptions<JSONSchema>;
|