Tons of Solutions Engineering work done today for the rest of the CS team! Headway, Howard Hanna, Engels, Brighton, etc. Also completed Datasnippers auth flow and worked on Anthology's script. Cloned Anthology's courses (900..) and will clone Full Story on Monday.

Scripts/node_modules/fs-extra/lib/copy/copy.js

@@ -0,0 +1,212 @@
+'use strict'
+
+const fs = require('graceful-fs')
+const path = require('path')
+const mkdirp = require('../mkdirs').mkdirs
+const pathExists = require('../path-exists').pathExists
+const utimes = require('../util/utimes').utimesMillis
+const stat = require('../util/stat')
+
+function copy (src, dest, opts, cb) {
+  if (typeof opts === 'function' && !cb) {
+    cb = opts
+    opts = {}
+  } else if (typeof opts === 'function') {
+    opts = { filter: opts }
+  }
+
+  cb = cb || function () {}
+  opts = opts || {}
+
+  opts.clobber = 'clobber' in opts ? !!opts.clobber : true // default to true for now
+  opts.overwrite = 'overwrite' in opts ? !!opts.overwrite : opts.clobber // overwrite falls back to clobber
+
+  // Warn about using preserveTimestamps on 32-bit node
+  if (opts.preserveTimestamps && process.arch === 'ia32') {
+    console.warn(`fs-extra: Using the preserveTimestamps option in 32-bit node is not recommended;\n
+    see https://github.com/jprichardson/node-fs-extra/issues/269`)
+  }
+
+  stat.checkPaths(src, dest, 'copy', (err, stats) => {
+    if (err) return cb(err)
+    const { srcStat, destStat } = stats
+    stat.checkParentPaths(src, srcStat, dest, 'copy', err => {
+      if (err) return cb(err)
+      if (opts.filter) return handleFilter(checkParentDir, destStat, src, dest, opts, cb)
+      return checkParentDir(destStat, src, dest, opts, cb)
+    })
+  })
+}
+
+function checkParentDir (destStat, src, dest, opts, cb) {
+  const destParent = path.dirname(dest)
+  pathExists(destParent, (err, dirExists) => {
+    if (err) return cb(err)
+    if (dirExists) return startCopy(destStat, src, dest, opts, cb)
+    mkdirp(destParent, err => {
+      if (err) return cb(err)
+      return startCopy(destStat, src, dest, opts, cb)
+    })
+  })
+}
+
+function handleFilter (onInclude, destStat, src, dest, opts, cb) {
+  Promise.resolve(opts.filter(src, dest)).then(include => {
+    if (include) return onInclude(destStat, src, dest, opts, cb)
+    return cb()
+  }, error => cb(error))
+}
+
+function startCopy (destStat, src, dest, opts, cb) {
+  if (opts.filter) return handleFilter(getStats, destStat, src, dest, opts, cb)
+  return getStats(destStat, src, dest, opts, cb)
+}
+
+function getStats (destStat, src, dest, opts, cb) {
+  const stat = opts.dereference ? fs.stat : fs.lstat
+  stat(src, (err, srcStat) => {
+    if (err) return cb(err)
+
+    if (srcStat.isDirectory()) return onDir(srcStat, destStat, src, dest, opts, cb)
+    else if (srcStat.isFile() ||
+             srcStat.isCharacterDevice() ||
+             srcStat.isBlockDevice()) return onFile(srcStat, destStat, src, dest, opts, cb)
+    else if (srcStat.isSymbolicLink()) return onLink(destStat, src, dest, opts, cb)
+  })
+}
+
+function onFile (srcStat, destStat, src, dest, opts, cb) {
+  if (!destStat) return copyFile(srcStat, src, dest, opts, cb)
+  return mayCopyFile(srcStat, src, dest, opts, cb)
+}
+
+function mayCopyFile (srcStat, src, dest, opts, cb) {
+  if (opts.overwrite) {
+    fs.unlink(dest, err => {
+      if (err) return cb(err)
+      return copyFile(srcStat, src, dest, opts, cb)
+    })
+  } else if (opts.errorOnExist) {
+    return cb(new Error(`'${dest}' already exists`))
+  } else return cb()
+}
+
+function copyFile (srcStat, src, dest, opts, cb) {
+  if (typeof fs.copyFile === 'function') {
+    return fs.copyFile(src, dest, err => {
+      if (err) return cb(err)
+      return setDestModeAndTimestamps(srcStat, dest, opts, cb)
+    })
+  }
+  return copyFileFallback(srcStat, src, dest, opts, cb)
+}
+
+function copyFileFallback (srcStat, src, dest, opts, cb) {
+  const rs = fs.createReadStream(src)
+  rs.on('error', err => cb(err)).once('open', () => {
+    const ws = fs.createWriteStream(dest, { mode: srcStat.mode })
+    ws.on('error', err => cb(err))
+      .on('open', () => rs.pipe(ws))
+      .once('close', () => setDestModeAndTimestamps(srcStat, dest, opts, cb))
+  })
+}
+
+function setDestModeAndTimestamps (srcStat, dest, opts, cb) {
+  fs.chmod(dest, srcStat.mode, err => {
+    if (err) return cb(err)
+    if (opts.preserveTimestamps) {
+      return utimes(dest, srcStat.atime, srcStat.mtime, cb)
+    }
+    return cb()
+  })
+}
+
+function onDir (srcStat, destStat, src, dest, opts, cb) {
+  if (!destStat) return mkDirAndCopy(srcStat, src, dest, opts, cb)
+  if (destStat && !destStat.isDirectory()) {
+    return cb(new Error(`Cannot overwrite non-directory '${dest}' with directory '${src}'.`))
+  }
+  return copyDir(src, dest, opts, cb)
+}
+
+function mkDirAndCopy (srcStat, src, dest, opts, cb) {
+  fs.mkdir(dest, err => {
+    if (err) return cb(err)
+    copyDir(src, dest, opts, err => {
+      if (err) return cb(err)
+      return fs.chmod(dest, srcStat.mode, cb)
+    })
+  })
+}
+
+function copyDir (src, dest, opts, cb) {
+  fs.readdir(src, (err, items) => {
+    if (err) return cb(err)
+    return copyDirItems(items, src, dest, opts, cb)
+  })
+}
+
+function copyDirItems (items, src, dest, opts, cb) {
+  const item = items.pop()
+  if (!item) return cb()
+  return copyDirItem(items, item, src, dest, opts, cb)
+}
+
+function copyDirItem (items, item, src, dest, opts, cb) {
+  const srcItem = path.join(src, item)
+  const destItem = path.join(dest, item)
+  stat.checkPaths(srcItem, destItem, 'copy', (err, stats) => {
+    if (err) return cb(err)
+    const { destStat } = stats
+    startCopy(destStat, srcItem, destItem, opts, err => {
+      if (err) return cb(err)
+      return copyDirItems(items, src, dest, opts, cb)
+    })
+  })
+}
+
+function onLink (destStat, src, dest, opts, cb) {
+  fs.readlink(src, (err, resolvedSrc) => {
+    if (err) return cb(err)
+    if (opts.dereference) {
+      resolvedSrc = path.resolve(process.cwd(), resolvedSrc)
+    }
+
+    if (!destStat) {
+      return fs.symlink(resolvedSrc, dest, cb)
+    } else {
+      fs.readlink(dest, (err, resolvedDest) => {
+        if (err) {
+          // dest exists and is a regular file or directory,
+          // Windows may throw UNKNOWN error. If dest already exists,
+          // fs throws error anyway, so no need to guard against it here.
+          if (err.code === 'EINVAL' || err.code === 'UNKNOWN') return fs.symlink(resolvedSrc, dest, cb)
+          return cb(err)
+        }
+        if (opts.dereference) {
+          resolvedDest = path.resolve(process.cwd(), resolvedDest)
+        }
+        if (stat.isSrcSubdir(resolvedSrc, resolvedDest)) {
+          return cb(new Error(`Cannot copy '${resolvedSrc}' to a subdirectory of itself, '${resolvedDest}'.`))
+        }
+
+        // do not copy if src is a subdir of dest since unlinking
+        // dest in this case would result in removing src contents
+        // and therefore a broken symlink would be created.
+        if (destStat.isDirectory() && stat.isSrcSubdir(resolvedDest, resolvedSrc)) {
+          return cb(new Error(`Cannot overwrite '${resolvedDest}' with '${resolvedSrc}'.`))
+        }
+        return copyLink(resolvedSrc, dest, cb)
+      })
+    }
+  })
+}
+
+function copyLink (resolvedSrc, dest, cb) {
+  fs.unlink(dest, err => {
+    if (err) return cb(err)
+    return fs.symlink(resolvedSrc, dest, cb)
+  })
+}
+
+module.exports = copy

Scripts/node_modules/fs-extra/lib/copy/index.js

@@ -0,0 +1,6 @@
+'use strict'
+
+const u = require('universalify').fromCallback
+module.exports = {
+  copy: u(require('./copy'))
+}