link-dir
Version:
Link directory
77 lines • 2.95 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
const path = require("path");
const fs = require("mz/fs");
const mkdirp = require("mkdirp-promise");
const rimraf = require("rimraf-then");
const bole = require("bole");
const logger = bole('link-dir');
function linkDir(existingDir, newDir) {
return __awaiter(this, void 0, void 0, function* () {
const stage = `${newDir}+stage`;
try {
yield rimraf(stage);
yield hardlinkDir(existingDir, stage);
yield rimraf(newDir);
yield fs.rename(stage, newDir);
}
catch (err) {
try {
yield rimraf(stage);
}
catch (err) { }
throw err;
}
});
}
function hardlinkDir(existingDir, newDir) {
return __awaiter(this, void 0, void 0, function* () {
yield mkdirp(newDir);
const dirs = yield fs.readdir(existingDir);
yield Promise.all(dirs
.map((relativePath) => __awaiter(this, void 0, void 0, function* () {
const existingPath = path.join(existingDir, relativePath);
const newPath = path.join(newDir, relativePath);
const stat = yield fs.lstat(existingPath);
if (stat.isSymbolicLink() || stat.isFile()) {
return safeLink(existingPath, newPath, stat);
}
if (stat.isDirectory()) {
return hardlinkDir(existingPath, newPath);
}
})));
});
}
function safeLink(existingPath, newPath, stat) {
return __awaiter(this, void 0, void 0, function* () {
try {
yield fs.link(existingPath, newPath);
}
catch (err) {
// shouldn't normally happen, but if the file was already somehow linked,
// the installation should not fail
if (err.code === 'EEXIST') {
return;
}
// might happen if package contains a broken symlink, we don't fail on this
if (err.code === 'ENOENT' && stat.isSymbolicLink()) {
logger.warn({
message: `Broken symlink found: ${existingPath}`,
});
return;
}
throw err;
}
});
}
// for backward compatibility
linkDir['default'] = linkDir;
module.exports = linkDir;
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