/usr/lib/node_modules/pnpm/dist/node_modules/tar/dist/esm
Edit: /usr/lib/node_modules/pnpm/dist/node_modules/tar/dist/esm/get-write-flag.js (1018B)
// Get the appropriate flag to use for creating files
// We use fmap on Windows platforms for files less than
// 512kb. This is a fairly low limit, but avoids making
// things slower in some cases. Since most of what this
// library is used for is extracting tarballs of many
// relatively small files in npm packages and the like,
// it can be a big boost on Windows platforms.
import fs from 'fs';
const platform = process.env.__FAKE_PLATFORM__ || process.platform;
const isWindows = platform === 'win32';
/* c8 ignore start */
const { O_CREAT, O_TRUNC, O_WRONLY } = fs.constants;
const UV_FS_O_FILEMAP = Number(process.env.__FAKE_FS_O_FILENAME__) ||
fs.constants.UV_FS_O_FILEMAP ||
0;
/* c8 ignore stop */
const fMapEnabled = isWindows && !!UV_FS_O_FILEMAP;
const fMapLimit = 512 * 1024;
const fMapFlag = UV_FS_O_FILEMAP | O_TRUNC | O_CREAT | O_WRONLY;
export const getWriteFlag = !fMapEnabled ?
() => 'w'
: (size) => (size < fMapLimit ? fMapFlag : 'w');
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