initial ext scaffolds

ckanext/file_upload_widget/assets/css/styles.css

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+.file-upload-widget .hidden{display:none}

ckanext/file_upload_widget/assets/js/file-upload-widget.js

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+ckan.module("file-upload-widget", function ($, _) {
+    "use strict";
+
+    return {
+        options: {
+            fileInput: '.file-upload-widget input[type="file"]',
+            fileInputButton: '.file-upload-widget .file-input-button',
+        },
+        initialize: function () {
+            $.proxyAll(this, /_/);
+
+            console.log('file-upload-widget initialized');
+
+            this.initBtn = this.el.find(".fuw-init-btn");
+
+            // Bind events
+            this.initBtn.on('click', this._onTriggerModal);
+        },
+        _onTriggerModal: function (e) {
+            console.log('trigger modal');
+        }
+    };
+});

ckanext/file_upload_widget/assets/webassets.yml

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+js:
+  filter: rjsmin
+  output: ckanext-charts/%(version)s-file-upload-widget.js
+  contents:
+    - js/file-upload-widget.js
+  extra:
+    preload:
+      - base/main
+
+css:
+  filter: rcssmin
+  output: ckanext-charts/%(version)s-file-upload-widget.css
+  contents:
+    - css/styles.css
+  extra:
+    preload:
+      - base/main

ckanext/file_upload_widget/gulpfile.js

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+const { resolve } = require("path");
+const { src, watch, dest } = require("gulp");
+const if_ = require("gulp-if");
+const sass = require('gulp-sass')(require('sass'));
+const sourcemaps = require("gulp-sourcemaps");
+const with_sourcemaps = () => !!process.env.DEBUG
+
+const themeDir = resolve("./theme");
+const assetsDir = resolve("./assets");
+
+const build = () => {
+    return src(resolve(themeDir, "styles.scss"))
+        .pipe(if_(with_sourcemaps(), sourcemaps.init()))
+        .pipe(sass({ outputStyle: !!process.env.DEBUG ? 'expanded' : 'compressed' }).on('error', sass.logError))
+        .pipe(if_(with_sourcemaps(), sourcemaps.write()))
+        .pipe(dest(resolve(assetsDir, "css")))
+}
+
+
+const watchSource = () => {
+    watch(
+        themeDir + "/**/*.scss",
+        { ignoreInitial: false },
+        build
+    )
+}
+
+
+exports.build = build;
+exports.watch = watchSource;