90 lines
2.7 KiB
JavaScript
90 lines
2.7 KiB
JavaScript
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'use strict';
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var os = require('os');
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var path = require('path');
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var through = require('through2');
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var fo = require('../file-operations');
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var isWindows = (os.platform() === 'win32');
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function linkStream(optResolver) {
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function linkFile(file, enc, callback) {
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var isRelative = optResolver.resolve('relativeSymlinks', file);
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var flags = fo.getFlags({
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overwrite: optResolver.resolve('overwrite', file),
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append: false,
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});
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if (!isWindows) {
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// On non-Windows, just use 'file'
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return createLinkWithType('file');
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}
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fo.reflectStat(file.symlink, file, onReflectTarget);
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function onReflectTarget(statErr) {
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if (statErr && statErr.code !== 'ENOENT') {
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return callback(statErr);
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}
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// If target doesn't exist, the vinyl will still carry the target stats.
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// Let's use those to determine which kind of dangling link to create.
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// This option provides a way to create a Junction instead of a
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// Directory symlink on Windows. This comes with the following caveats:
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// * NTFS Junctions cannot be relative.
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// * NTFS Junctions MUST be directories.
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// * NTFS Junctions must be on the same file system.
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// * Most products CANNOT detect a directory is a Junction:
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// This has the side effect of possibly having a whole directory
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// deleted when a product is deleting the Junction directory.
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// For example, JetBrains product lines will delete the entire contents
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// of the TARGET directory because the product does not realize it's
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// a symlink as the JVM and Node return false for isSymlink.
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// This function is Windows only, so we don't need to check again
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var useJunctions = optResolver.resolve('useJunctions', file);
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var dirType = useJunctions ? 'junction' : 'dir';
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var type = !statErr && file.isDirectory() ? dirType : 'file';
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createLinkWithType(type);
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}
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function createLinkWithType(type) {
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// This is done after prepare() to use the adjusted file.base property
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if (isRelative && type !== 'junction') {
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file.symlink = path.relative(file.base, file.symlink);
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}
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var opts = {
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flags: flags,
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type: type,
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};
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fo.symlink(file.symlink, file.path, opts, onSymlink);
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}
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function onSymlink(symlinkErr) {
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if (symlinkErr) {
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return callback(symlinkErr);
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}
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fo.reflectLinkStat(file.path, file, onReflectLink);
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}
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function onReflectLink(reflectErr) {
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if (reflectErr) {
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return callback(reflectErr);
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}
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callback(null, file);
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}
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}
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return through.obj(linkFile);
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}
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module.exports = linkStream;
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