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build/node_modules/vinyl-fs/lib/prepareWrite.js

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+'use strict';
+
+var assign = require('object-assign');
+var path = require('path');
+var mkdirp = require('mkdirp');
+var fs = require('graceful-fs');
+
+function booleanOrFunc(v, file) {
+  if (typeof v !== 'boolean' && typeof v !== 'function') {
+    return null;
+  }
+
+  return typeof v === 'boolean' ? v : v(file);
+}
+
+function stringOrFunc(v, file) {
+  if (typeof v !== 'string' && typeof v !== 'function') {
+    return null;
+  }
+
+  return typeof v === 'string' ? v : v(file);
+}
+
+function prepareWrite(outFolder, file, opt, cb) {
+  var options = assign({
+    cwd: process.cwd(),
+    mode: (file.stat ? file.stat.mode : null),
+    dirMode: null,
+    overwrite: true,
+  }, opt);
+  var overwrite = booleanOrFunc(options.overwrite, file);
+  options.flag = (overwrite ? 'w' : 'wx');
+
+  var cwd = path.resolve(options.cwd);
+  var outFolderPath = stringOrFunc(outFolder, file);
+  if (!outFolderPath) {
+    throw new Error('Invalid output folder');
+  }
+  var basePath = options.base ?
+    stringOrFunc(options.base, file) : path.resolve(cwd, outFolderPath);
+  if (!basePath) {
+    throw new Error('Invalid base option');
+  }
+
+  var writePath = path.resolve(basePath, file.relative);
+  var writeFolder = path.dirname(writePath);
+
+  // Wire up new properties
+  file.stat = (file.stat || new fs.Stats());
+  file.stat.mode = options.mode;
+  file.flag = options.flag;
+  file.cwd = cwd;
+  file.base = basePath;
+  file.path = writePath;
+
+  // Mkdirp the folder the file is going in
+  var mkdirpOpts = {
+    mode: options.dirMode,
+    fs: fs,
+  };
+  mkdirp(writeFolder, mkdirpOpts, function(err) {
+    if (err) {
+      return cb(err);
+    }
+    cb(null, writePath);
+  });
+}
+
+module.exports = prepareWrite;