update

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

@@ -0,0 +1,164 @@
+'use strict'
+
+const fs = require('graceful-fs')
+const path = require('path')
+const mkdirpSync = require('../mkdirs').mkdirsSync
+const utimesSync = require('../util/utimes.js').utimesMillisSync
+const stat = require('../util/stat')
+
+function copySync (src, dest, opts) {
+  if (typeof opts === 'function') {
+    opts = { filter: opts }
+  }
+
+  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`)
+  }
+
+  const { srcStat, destStat } = stat.checkPathsSync(src, dest, 'copy')
+  stat.checkParentPathsSync(src, srcStat, dest, 'copy')
+  return handleFilterAndCopy(destStat, src, dest, opts)
+}
+
+function handleFilterAndCopy (destStat, src, dest, opts) {
+  if (opts.filter && !opts.filter(src, dest)) return
+  const destParent = path.dirname(dest)
+  if (!fs.existsSync(destParent)) mkdirpSync(destParent)
+  return startCopy(destStat, src, dest, opts)
+}
+
+function startCopy (destStat, src, dest, opts) {
+  if (opts.filter && !opts.filter(src, dest)) return
+  return getStats(destStat, src, dest, opts)
+}
+
+function getStats (destStat, src, dest, opts) {
+  const statSync = opts.dereference ? fs.statSync : fs.lstatSync
+  const srcStat = statSync(src)
+
+  if (srcStat.isDirectory()) return onDir(srcStat, destStat, src, dest, opts)
+  else if (srcStat.isFile() ||
+           srcStat.isCharacterDevice() ||
+           srcStat.isBlockDevice()) return onFile(srcStat, destStat, src, dest, opts)
+  else if (srcStat.isSymbolicLink()) return onLink(destStat, src, dest, opts)
+}
+
+function onFile (srcStat, destStat, src, dest, opts) {
+  if (!destStat) return copyFile(srcStat, src, dest, opts)
+  return mayCopyFile(srcStat, src, dest, opts)
+}
+
+function mayCopyFile (srcStat, src, dest, opts) {
+  if (opts.overwrite) {
+    fs.unlinkSync(dest)
+    return copyFile(srcStat, src, dest, opts)
+  } else if (opts.errorOnExist) {
+    throw new Error(`'${dest}' already exists`)
+  }
+}
+
+function copyFile (srcStat, src, dest, opts) {
+  if (typeof fs.copyFileSync === 'function') {
+    fs.copyFileSync(src, dest)
+    fs.chmodSync(dest, srcStat.mode)
+    if (opts.preserveTimestamps) {
+      return utimesSync(dest, srcStat.atime, srcStat.mtime)
+    }
+    return
+  }
+  return copyFileFallback(srcStat, src, dest, opts)
+}
+
+function copyFileFallback (srcStat, src, dest, opts) {
+  const BUF_LENGTH = 64 * 1024
+  const _buff = require('../util/buffer')(BUF_LENGTH)
+
+  const fdr = fs.openSync(src, 'r')
+  const fdw = fs.openSync(dest, 'w', srcStat.mode)
+  let pos = 0
+
+  while (pos < srcStat.size) {
+    const bytesRead = fs.readSync(fdr, _buff, 0, BUF_LENGTH, pos)
+    fs.writeSync(fdw, _buff, 0, bytesRead)
+    pos += bytesRead
+  }
+
+  if (opts.preserveTimestamps) fs.futimesSync(fdw, srcStat.atime, srcStat.mtime)
+
+  fs.closeSync(fdr)
+  fs.closeSync(fdw)
+}
+
+function onDir (srcStat, destStat, src, dest, opts) {
+  if (!destStat) return mkDirAndCopy(srcStat, src, dest, opts)
+  if (destStat && !destStat.isDirectory()) {
+    throw new Error(`Cannot overwrite non-directory '${dest}' with directory '${src}'.`)
+  }
+  return copyDir(src, dest, opts)
+}
+
+function mkDirAndCopy (srcStat, src, dest, opts) {
+  fs.mkdirSync(dest)
+  copyDir(src, dest, opts)
+  return fs.chmodSync(dest, srcStat.mode)
+}
+
+function copyDir (src, dest, opts) {
+  fs.readdirSync(src).forEach(item => copyDirItem(item, src, dest, opts))
+}
+
+function copyDirItem (item, src, dest, opts) {
+  const srcItem = path.join(src, item)
+  const destItem = path.join(dest, item)
+  const { destStat } = stat.checkPathsSync(srcItem, destItem, 'copy')
+  return startCopy(destStat, srcItem, destItem, opts)
+}
+
+function onLink (destStat, src, dest, opts) {
+  let resolvedSrc = fs.readlinkSync(src)
+  if (opts.dereference) {
+    resolvedSrc = path.resolve(process.cwd(), resolvedSrc)
+  }
+
+  if (!destStat) {
+    return fs.symlinkSync(resolvedSrc, dest)
+  } else {
+    let resolvedDest
+    try {
+      resolvedDest = fs.readlinkSync(dest)
+    } catch (err) {
+      // dest exists and is a regular file or directory,
+      // Windows may throw UNKNOWN error. If dest already exists,
+      // fs throws error anyway, so no need to guard against it here.
+      if (err.code === 'EINVAL' || err.code === 'UNKNOWN') return fs.symlinkSync(resolvedSrc, dest)
+      throw err
+    }
+    if (opts.dereference) {
+      resolvedDest = path.resolve(process.cwd(), resolvedDest)
+    }
+    if (stat.isSrcSubdir(resolvedSrc, resolvedDest)) {
+      throw new Error(`Cannot copy '${resolvedSrc}' to a subdirectory of itself, '${resolvedDest}'.`)
+    }
+
+    // prevent copy if src is a subdir of dest since unlinking
+    // dest in this case would result in removing src contents
+    // and therefore a broken symlink would be created.
+    if (fs.statSync(dest).isDirectory() && stat.isSrcSubdir(resolvedDest, resolvedSrc)) {
+      throw new Error(`Cannot overwrite '${resolvedDest}' with '${resolvedSrc}'.`)
+    }
+    return copyLink(resolvedSrc, dest)
+  }
+}
+
+function copyLink (resolvedSrc, dest) {
+  fs.unlinkSync(dest)
+  return fs.symlinkSync(resolvedSrc, dest)
+}
+
+module.exports = copySync