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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | 3x 125x 125x 58x 58x 58x 58x 114x 114x 58x 67x 58x 58x 58x 9x 9x 3x 45x 45x 21x 21x 21x 21x 42x 21x 21x 21x 21x 3x 3x 3x | import { SnapshotNodeType } from './constants';
import type { AsyncSnapshotOptions, SnapshotNode } from './types';
export const toSnapshot = async ({ fs, path = '/', separator = '/' }: AsyncSnapshotOptions): Promise<SnapshotNode> => {
const stats = await fs.lstat(path);
if (stats.isDirectory()) {
const list = await fs.readdir(path);
const entries: { [child: string]: SnapshotNode } = {};
const dir = path.endsWith(separator) ? path : path + separator;
for (const child of list) {
const childSnapshot = await toSnapshot({ fs, path: `${dir}${child}`, separator });
if (childSnapshot) entries['' + child] = childSnapshot;
}
return [SnapshotNodeType.Folder, {}, entries];
} else if (stats.isFile()) {
const buf = (await fs.readFile(path)) as Buffer;
const uint8 = new Uint8Array(buf.buffer, buf.byteOffset, buf.byteLength);
return [SnapshotNodeType.File, {}, uint8];
} else if (stats.isSymbolicLink()) {
return [
SnapshotNodeType.Symlink,
{
target: (await fs.readlink(path, { encoding: 'utf8' })) as string,
},
];
}
return null;
};
export const fromSnapshot = async (
snapshot: SnapshotNode,
{ fs, path = '/', separator = '/' }: AsyncSnapshotOptions,
): Promise<void> => {
Iif (!snapshot) return;
switch (snapshot[0]) {
case SnapshotNodeType.Folder: {
if (!path.endsWith(separator)) path = path + separator;
const [, , entries] = snapshot;
await fs.mkdir(path, { recursive: true });
for (const [name, child] of Object.entries(entries))
await fromSnapshot(child, { fs, path: `${path}${name}`, separator });
break;
}
case SnapshotNodeType.File: {
const [, , data] = snapshot;
await fs.writeFile(path, data);
break;
}
case SnapshotNodeType.Symlink: {
const [, { target }] = snapshot;
await fs.symlink(target, path);
break;
}
}
};
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