Moved new build process out of gulp folder

build/file.js

@@ -0,0 +1,91 @@
+
+const path = require('path');
+const { pick } = require('lodash');
+const {
+  normalizedExt,
+  kind,
+  type,
+} = require('./resolve');
+const actions = require('./actions');
+
+
+module.exports = exports = class File {
+
+  constructor (filepath) {
+    if (filepath && typeof filepath === 'object') {
+      // we've been passed a json object, treat as serialized Page
+      Object.assign(this, filepath);
+      return this;
+    }
+
+    const file = path.parse(filepath);
+    let { base: basename, name } = file;
+
+    this.preprocessed = false;
+    if (name[0] === '_') {
+      this.preprocessed = true;
+      file.name = name = name.slice(1);
+      file.basename = basename = basename.slice(1);
+    }
+
+    // remove the public root and any _images segment from the dir
+    const dir = this._dir(file.dir);
+
+    this.kind     = kind(filepath);
+    this.type     = type(filepath);
+    this.cwd      = file.dir;
+    this.ext      = this.preprocessed ? file.ext : normalizedExt(file.ext);
+    this.input    = filepath;                    // public/file.ext
+    this.base     = path.join(...dir);           // '', 'folder', 'folder/subfolder'
+    this.dir      = path.join('/', ...dir);      // /, /folder, /folder/subfolder
+    this.name     = name;                        // index, fileA, fileB
+    this.basename = basename;                    // index.ext, fileA.ext, fileB.ext
+    this.ext      = file.ext;
+
+    this._out();
+
+    this.serializable = [
+      'kind',
+      'type',
+      'cwd',
+      'ext',
+      'input',
+      'base',
+      'dir',
+      'name',
+      'basename',
+      'ext',
+      'out',
+      'url',
+    ];
+  }
+
+  _dir (dir) {
+    dir = dir.split('/');
+    if (dir[0] === 'public') dir.shift();
+    const i = dir.indexOf('_images');
+    if (i > -1) dir.splice(i, 1);
+    return dir;
+  }
+
+  _out () {
+    this.out = path.join(this.base, `${this.name}${this.ext}`);
+    this.url = path.join(this.dir,  `${this.name}${this.ext}`);
+  }
+
+  load () {}
+
+  tasks () {
+    return [ {
+      input: this.input,
+      output: this.out,
+      action: actions.copy,
+      nocache: true,
+    } ];
+  }
+
+  toJson () {
+    return pick(this, this.serializable);
+  }
+
+};