[Build] extract build iconfont (#1242)

build/build-style-entry.js

@@ -0,0 +1,47 @@
+/**
+ * Build style entry of all components
+ */
+
+const fs = require('fs-extra');
+const path = require('path');
+const components = require('./get-components')();
+const dependencyTree = require('dependency-tree');
+const SEP = path.sep;
+
+function build(folder, isESModule) {
+  const dir = path.resolve(__dirname, '../', folder);
+  components.forEach(componentName => {
+    const content = analyzeDependencies(componentName, dir)
+      .map(component => isESModule ? `import '../../vant-css/${component}.css';` : `require('../../vant-css/${component}.css');`);
+    fs.outputFileSync(path.join(dir, componentName, './style/index.js'), content.join('\n'));
+  });
+
+  // Analyze component dependencies
+  function analyzeDependencies(componentName, dir) {
+    const checkList = ['base'];
+    const whiteList = ['icon', 'loading', 'cell', 'button'];
+    search(dependencyTree({
+      directory: dir,
+      filename: path.resolve(dir, componentName, 'index.js'),
+      filter: path => path.indexOf(`vant${SEP}${folder}${SEP}`) !== -1
+    }), checkList, whiteList);
+    return checkList.filter(component => checkComponentHasStyle(component));
+  }
+
+  function search(tree, checkList, whiteList) {
+    tree && Object.keys(tree).forEach(key => {
+      search(tree[key], checkList, whiteList);
+      const component = key.split(`${SEP}vant${SEP}${folder}${SEP}`)[1].replace(`${SEP}index.js`, '').replace(`mixins${SEP}`, '');
+      if (checkList.indexOf(component) === -1 && whiteList.indexOf(component) === -1) {
+        checkList.push(component);
+      }
+    });
+  }
+
+  function checkComponentHasStyle(componentName) {
+    return fs.existsSync(path.join(__dirname, `../${folder}/vant-css/`, `${componentName}.css`));
+  }
+}
+
+build('es', true);
+build('lib');