1 files changed, 264 insertions, 0 deletions
diff --git a/node_modules/fs-extra/lib/copy/copy.js b/node_modules/fs-extra/lib/copy/copy.js
new file mode 100644
index 0000000..fd9687f
--- /dev/null
+++ b/node_modules/fs-extra/lib/copy/copy.js
@@ -0,0 +1,264 @@
+'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 notExist = Symbol('notExist')
+const existsReg = Symbol('existsReg')
+
+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`)
+  }
+
+  src = path.resolve(src)
+  dest = path.resolve(dest)
+
+  // don't allow src and dest to be the same
+  if (src === dest) return cb(new Error('Source and destination must not be the same.'))
+
+  if (opts.filter) return handleFilter(checkParentDir, src, dest, opts, cb)
+  return checkParentDir(src, dest, opts, cb)
+}
+
+function checkParentDir (src, dest, opts, cb) {
+  const destParent = path.dirname(dest)
+  pathExists(destParent, (err, dirExists) => {
+    if (err) return cb(err)
+    if (dirExists) return startCopy(src, dest, opts, cb)
+    mkdirp(destParent, err => {
+      if (err) return cb(err)
+      return startCopy(src, dest, opts, cb)
+    })
+  })
+}
+
+function startCopy (src, dest, opts, cb) {
+  if (opts.filter) return handleFilter(getStats, src, dest, opts, cb)
+  return getStats(src, dest, opts, cb)
+}
+
+function handleFilter (onInclude, src, dest, opts, cb) {
+  Promise.resolve(opts.filter(src, dest))
+    .then(include => {
+      if (include) return onInclude(src, dest, opts, cb)
+      return cb()
+    }, error => cb(error))
+}
+
+function getStats (src, dest, opts, cb) {
+  const stat = opts.dereference ? fs.stat : fs.lstat
+  stat(src, (err, st) => {
+    if (err) return cb(err)
+
+    if (st.isDirectory()) return onDir(st, src, dest, opts, cb)
+    else if (st.isFile() ||
+             st.isCharacterDevice() ||
+             st.isBlockDevice()) return onFile(st, src, dest, opts, cb)
+    else if (st.isSymbolicLink()) return onLink(src, dest, opts, cb)
+  })
+}
+
+function onFile (srcStat, src, dest, opts, cb) {
+  checkDest(dest, (err, resolvedPath) => {
+    if (err) return cb(err)
+    if (resolvedPath === notExist) {
+      return copyFile(srcStat, src, dest, opts, cb)
+    } else if (resolvedPath === existsReg) {
+      return mayCopyFile(srcStat, src, dest, opts, cb)
+    } else {
+      if (src === resolvedPath) return 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(`'${dest}' already exists`))
+  } else return cb()
+}
+
+function copyFile (srcStat, src, dest, opts, cb) {
+  if (typeof fs.copyFile === 'function') {
+    return fs.copyFile(src, dest, err => {
+      if (err) return cb(err)
+      return setDestModeAndTimestamps(srcStat, dest, opts, cb)
+    })
+  }
+  return copyFileFallback(srcStat, src, dest, opts, cb)
+}
+
+function copyFileFallback (srcStat, src, dest, opts, cb) {
+  const rs = fs.createReadStream(src)
+  rs.on('error', err => cb(err))
+    .once('open', () => {
+      const ws = fs.createWriteStream(dest, { mode: srcStat.mode })
+      ws.on('error', err => cb(err))
+        .on('open', () => rs.pipe(ws))
+        .once('close', () => setDestModeAndTimestamps(srcStat, dest, opts, cb))
+    })
+}
+
+function setDestModeAndTimestamps (srcStat, dest, opts, cb) {
+  fs.chmod(dest, srcStat.mode, err => {
+    if (err) return cb(err)
+    if (opts.preserveTimestamps) {
+      return utimes(dest, srcStat.atime, srcStat.mtime, cb)
+    }
+    return cb()
+  })
+}
+
+function onDir (srcStat, src, dest, opts, cb) {
+  checkDest(dest, (err, resolvedPath) => {
+    if (err) return cb(err)
+    if (resolvedPath === notExist) {
+      if (isSrcSubdir(src, dest)) {
+        return cb(new Error(`Cannot copy '${src}' to a subdirectory of itself, '${dest}'.`))
+      }
+      return mkDirAndCopy(srcStat, src, dest, opts, cb)
+    } else if (resolvedPath === existsReg) {
+      if (isSrcSubdir(src, dest)) {
+        return cb(new Error(`Cannot copy '${src}' to a subdirectory of itself, '${dest}'.`))
+      }
+      return mayCopyDir(src, dest, opts, cb)
+    } else {
+      if (src === resolvedPath) return cb()
+      return copyDir(src, dest, opts, cb)
+    }
+  })
+}
+
+function mayCopyDir (src, dest, opts, cb) {
+  fs.stat(dest, (err, st) => {
+    if (err) return cb(err)
+    if (!st.isDirectory()) {
+      return cb(new Error(`Cannot overwrite non-directory '${dest}' with directory '${src}'.`))
+    }
+    return copyDir(src, dest, opts, cb)
+  })
+}
+
+function mkDirAndCopy (srcStat, src, dest, opts, cb) {
+  fs.mkdir(dest, srcStat.mode, err => {
+    if (err) return cb(err)
+    fs.chmod(dest, srcStat.mode, err => {
+      if (err) return cb(err)
+      return copyDir(src, dest, opts, cb)
+    })
+  })
+}
+
+function copyDir (src, dest, opts, cb) {
+  fs.readdir(src, (err, items) => {
+    if (err) return cb(err)
+    return copyDirItems(items, src, dest, opts, cb)
+  })
+}
+
+function copyDirItems (items, src, dest, opts, cb) {
+  const item = items.pop()
+  if (!item) return cb()
+  startCopy(path.join(src, item), path.join(dest, item), opts, err => {
+    if (err) return cb(err)
+    return copyDirItems(items, src, dest, opts, cb)
+  })
+}
+
+function onLink (src, dest, opts, cb) {
+  fs.readlink(src, (err, resolvedSrcPath) => {
+    if (err) return cb(err)
+
+    if (opts.dereference) {
+      resolvedSrcPath = path.resolve(process.cwd(), resolvedSrcPath)
+    }
+
+    checkDest(dest, (err, resolvedDestPath) => {
+      if (err) return cb(err)
+
+      if (resolvedDestPath === notExist || resolvedDestPath === existsReg) {
+        // if dest already exists, fs throws error anyway,
+        // so no need to guard against it here.
+        return fs.symlink(resolvedSrcPath, dest, cb)
+      } else {
+        if (opts.dereference) {
+          resolvedDestPath = path.resolve(process.cwd(), resolvedDestPath)
+        }
+        if (resolvedDestPath === resolvedSrcPath) return cb()
+
+        // prevent copy if src is a subdir of dest since unlinking
+        // dest in this case would result in removing src contents
+        // and therefore a broken symlink would be created.
+        fs.stat(dest, (err, st) => {
+          if (err) return cb(err)
+          if (st.isDirectory() && isSrcSubdir(resolvedDestPath, resolvedSrcPath)) {
+            return cb(new Error(`Cannot overwrite '${resolvedDestPath}' with '${resolvedSrcPath}'.`))
+          }
+          return copyLink(resolvedSrcPath, dest, cb)
+        })
+      }
+    })
+  })
+}
+
+function copyLink (resolvedSrcPath, dest, cb) {
+  fs.unlink(dest, err => {
+    if (err) return cb(err)
+    return fs.symlink(resolvedSrcPath, dest, cb)
+  })
+}
+
+// check if dest exists and/or is a symlink
+function checkDest (dest, cb) {
+  fs.readlink(dest, (err, resolvedPath) => {
+    if (err) {
+      if (err.code === 'ENOENT') return cb(null, notExist)
+
+      // dest exists and is a regular file or directory, Windows may throw UNKNOWN error.
+      if (err.code === 'EINVAL' || err.code === 'UNKNOWN') return cb(null, existsReg)
+
+      return cb(err)
+    }
+    return cb(null, resolvedPath) // dest exists and is a symlink
+  })
+}
+
+// return true if dest is a subdir of src, otherwise false.
+// extract dest base dir and check if that is the same as src basename
+function isSrcSubdir (src, dest) {
+  const baseDir = dest.split(path.dirname(src) + path.sep)[1]
+  if (baseDir) {
+    const destBasename = baseDir.split(path.sep)[0]
+    if (destBasename) {
+      return src !== dest && dest.indexOf(src) > -1 && destBasename === path.basename(src)
+    }
+    return false
+  }
+  return false
+}
+
+module.exports = copy