63 lines
1.4 KiB
JavaScript
63 lines
1.4 KiB
JavaScript
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/* jslint node: true */
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'use strict';
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// ENiGMA½
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// deps
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const fse = require('fs-extra');
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const paths = require('path');
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const async = require('async');
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exports.moveFileWithCollisionHandling = moveFileWithCollisionHandling;
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exports.pathWithTerminatingSeparator = pathWithTerminatingSeparator;
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//
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// Move |src| -> |dst| renaming to file(1).ext, file(2).ext, etc.
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// in the case of collisions.
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//
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function moveFileWithCollisionHandling(src, dst, cb) {
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const dstPath = paths.dirname(dst);
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const dstFileExt = paths.extname(dst);
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const dstFileSuffix = paths.basename(dst, dstFileExt);
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let renameIndex = 0;
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let movedOk = false;
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let tryDstPath;
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async.until(
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() => movedOk, // until moved OK
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(cb) => {
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if(0 === renameIndex) {
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// try originally supplied path first
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tryDstPath = dst;
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} else {
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tryDstPath = paths.join(dstPath, `${dstFileSuffix}(${renameIndex})${dstFileExt}`);
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}
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fse.move(src, tryDstPath, err => {
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if(err) {
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if('EEXIST' === err.code) {
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renameIndex += 1;
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return cb(null); // keep trying
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}
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return cb(err);
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}
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movedOk = true;
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return cb(null, tryDstPath);
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});
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},
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(err, finalPath) => {
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return cb(err, finalPath);
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}
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);
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}
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function pathWithTerminatingSeparator(path) {
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if(path && paths.sep !== path.charAt(path.length - 1)) {
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path = path + paths.sep;
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}
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return path;
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}
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