feat: broccoli image to thumbnail plugin

.commitlintrc.js

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+/* eslint-env node */
+'use strict';
+
+module.exports = {
+	extends: ['@commitlint/config-conventional']
+};

.editorconfig

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+[*]
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+indent_style = space
+indent_size = 2
+
+[*.{html,css,hbs,js,ts}]
+indent_style = tab
+indent_size = tab
+tab_width = 4
+
+[*.hbs]
+insert_final_newline = false
+
+[*.md]
+trim_trailing_whitespace = false

.eslintignore

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+# dependencies
+/node_modules/
+
+# misc
+/coverage/
+!.*

.eslintrc.js

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+/* eslint-env node */
+'use strict';
+
+module.exports = {
+	root: true,
+	parserOptions: {
+		ecmaVersion: 2017
+	},
+	extends: 'eslint-config-bbva',
+	env: {
+		node: true
+	},
+	rules: {
+		"callback-return": 0
+	}
+};

.gitignore

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+# dependencies
+/node_modules
+
+# misc
+/.sass-cache
+/connect.lock
+/coverage/*
+/libpeerconnection.log
+npm-debug.log*
+yarn-error.log
+testem.log
+tags*

.huskyrc.js

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+'use strict';
+
+module.exports = {
+	hooks: {
+		'commit-msg': 'commitlint -E HUSKY_GIT_PARAMS',
+		'pre-push': 'npm run lint:js && npm run lint:hbs && npm run test'
+	}
+};

.npmignore

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+# misc
+/.editorconfig
+/.eslintignore
+/.eslintrc.js
+/.gitignore
+/.travis.yml

.releaserc

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+{
+    "prepare": [
+        "@semantic-release/changelog",
+        "@semantic-release/npm",
+        "@semantic-release/git"
+    ],
+    "verifyConditions": [
+        "@semantic-release/changelog",
+        "@semantic-release/npm",
+        "@semantic-release/git",
+        "@semantic-release/github"
+    ]
+}

.travis.yml

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+---
+language: node_js
+sudo: false
+dist: trusty
+node_js: 'stable'
+
+cache:
+  directories:
+    - $HOME/.npm
+
+matrix:
+  fast_finish: true
+
+before_install:
+  # Configuration.
+  - npm config set spin false
+  - npm install -g codecov
+  - npm install -g greenkeeper-lockfile@1
+  - npm install -g @commitlint/travis-cli
+  - npm --version
+
+install:
+  - if [[ $TRAVIS_BRANCH =~ greenkeeper || $TRAVIS_PULL_REQUEST_BRANCH =~ greenkeeper ]]; then npm install; else npm ci; fi
+
+before_script:
+  - greenkeeper-lockfile-update
+
+script:
+  - commitlint-travis
+  - npm run lint:js
+  - COVERAGE=true node_modules/.bin/ember try:one $EMBER_TRY_SCENARIO --skip-cleanup
+
+after_script:
+  - greenkeeper-lockfile-upload
+
+after_success:
+  - codecov --file=coverage/lcov.info
+
+stages:
+  - test
+  - name: release
+    if: branch = master
+
+jobs:
+  include:
+    - stage: release
+      script: skip
+      env: []
+      deploy:
+        provider: script
+        skip_cleanup: true
+        script:
+          - npx semantic-release

README.md

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+# broccoli-thumbnail
+
+[![Build Status](https://travis-ci.org/BBVAEngineering/broccoli-thumbnail.svg?branch=master)](https://travis-ci.org/BBVAEngineering/broccoli-thumbnail)
+[![GitHub version](https://badge.fury.io/gh/BBVAEngineering%2Fbroccoli-thumbnail.svg)](https://badge.fury.io/gh/BBVAEngineering%2Fbroccoli-thumbnail)
+[![NPM version](https://badge.fury.io/js/broccoli-thumbnail.svg)](https://badge.fury.io/js/broccoli-thumbnail)
+[![Dependency Status](https://david-dm.org/BBVAEngineering/broccoli-thumbnail.svg)](https://david-dm.org/BBVAEngineering/broccoli-thumbnail)
+[![codecov](https://codecov.io/gh/BBVAEngineering/broccoli-thumbnail/branch/master/graph/badge.svg)](https://codecov.io/gh/BBVAEngineering/broccoli-thumbnail)
+[![Greenkeeper badge](https://badges.greenkeeper.io/BBVAEngineering/broccoli-thumbnail.svg)](https://greenkeeper.io/)
+
+## Information
+
+[![NPM](https://nodei.co/npm/broccoli-thumbnail.png?downloads=true&downloadRank=true)](https://nodei.co/npm/broccoli-thumbnail/)
+
+Copy and resizes images given an input tree.
+
+**Why?** For example, to generate a low quality copy of each image and improve the page speed when loading.
+
+## Installation & usage
+
+`npm install --save broccoli-thumbnail`
+
+
+```javascript
+// Raw
+const Thumbnail = require('broccoli-thumbnail');
+
+const myTree = new Funnel('assets/images');
+const thumbnailTree = new Thumbnail(myTree, {
+  width: 128,
+  prefix: 'small-'
+});
+```
+
+```javascript
+// Ember addon style
+const Thumbnail = require('broccoli-thumbnail');
+
+module.exports = {
+  // ...
+
+  treeForPublic() {
+    return new Thumbnail('assets/images');
+  }
+};
+```
+
+## Options
+
+| Option | Type     | Defaults                      | Description                               |
+|--------|----------|-------------------------------|-------------------------------------------|
+| prefix | `String` | `thumbnail_`                  | Prefix to be added on each thumbnail name |
+| globs  | `Array`  | `['**/*.(jpg|jpeg|gif|png)']` | Files to be processed                     |
+| width  | `Number` | `64`                          | Thumbnail width                           |
+
+## Versioning
+
+We use [SemVer](http://semver.org/) for versioning. For the versions available, see the [tags on this repository](https://github.com/BBVAEngineering/broccoli-thumbnail/tags).
+
+## Authors
+
+See the list of [contributors](https://github.com/BBVAEngineering/broccoli-thumbnail/graphs/contributors) who participated in this project.
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE.md](LICENSE.md) file for details

index.js

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+const Thumbnail = require('./lib/thumbnail');
+
+module.exports = Thumbnail;

lib/thumbnail.js

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+'use strict';
+
+const Plugin = require('broccoli-caching-writer');
+const path = require('path');
+const fs = require('fs-extra');
+const walkSync = require('walk-sync');
+const sharp = require('sharp');
+
+async function asyncForEach(array, callback) {
+	for (let index = 0; index < array.length; index++) {
+		await callback(array[index], index, array);
+	}
+}
+
+class Thumbnail extends Plugin {
+	constructor(inputNode, options = {}) {
+		options = Object.assign({
+			prefix: 'thumbnail_',
+			globs: [
+				'**/*.{jpg,jpeg,gif,png}'
+			],
+			width: 64
+		}, options);
+
+		super([inputNode], options);
+		this.options = options;
+	}
+
+	async build() {
+		const { globs, prefix, width } = this.options;
+		const inputPath = this.inputPaths[0];
+		const allInputFiles = walkSync(inputPath, { directories: false });
+		const images = walkSync(inputPath, { directories: false, globs });
+
+		await asyncForEach(images, async(relativePath) => {
+			const absolutePath = path.join(inputPath, relativePath);
+			const basename = path.basename(relativePath);
+			const dirname = path.dirname(relativePath);
+			const thumbnailRelativePath = path.join(dirname, `${prefix}${basename}`);
+			const image = sharp(absolutePath);
+
+			await fs.ensureDir(path.join(this.outputPath, dirname));
+
+			const metadata = await image.metadata();
+			const height = parseInt(metadata.height * width / metadata.width, 10);
+
+			await image
+				.resize(width, height)
+				.toFile(path.join(this.outputPath, thumbnailRelativePath));
+		});
+
+		await asyncForEach(allInputFiles, async(relativePath) => {
+			const absolutePath = path.join(inputPath, relativePath);
+			const outputPath = path.join(this.outputPath, relativePath);
+
+			await fs.ensureLink(absolutePath, outputPath);
+		});
+	}
+}
+
+module.exports = Thumbnail;

package.json

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+{
+  "name": "broccoli-thumbnail",
+  "version": "1.0.0",
+  "description": "Copy and resizes images given an input tree",
+  "main": "index.js",
+  "scripts": {
+    "test": "mocha ./tests",
+    "lint:js": "eslint --ext .js --max-warnings 0 ./*.js lib tests",
+    "report-coverage": "istanbul report --include=coverage/coverage-final.json text",
+    "check-coverage": "istanbul check-coverage coverage/coverage-final.json --statements 95 --functions 95 --branches 95 --lines 95",
+    "commit": "git-cz",
+    "prepublishOnly": "ember ts:precompile",
+    "postpublish": "ember ts:clean",
+    "semantic-release": "semantic-release",
+    "travis-deploy-once": "travis-deploy-once"
+  },
+  "config": {
+    "commitizen": {
+      "path": "./node_modules/cz-conventional-changelog"
+    }
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/BBVAEngineering/broccoli-thumbnail.git"
+  },
+  "keywords": [
+    "broccoli",
+    "image",
+    "meta",
+    "tree",
+    "process"
+  ],
+  "author": "BBVAEngineering",
+  "contributors": [
+    {
+      "name": "josex2r",
+      "url": "https://github.com/josex2r"
+    }
+  ],
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/BBVAEngineering/broccoli-thumbnail/issues"
+  },
+  "homepage": "https://github.com/BBVAEngineering/broccoli-thumbnail#readme",
+  "engines": {
+    "node": ">= 8.*"
+  },
+  "devDependencies": {
+    "@commitlint/cli": "^7.0.0",
+    "@commitlint/config-conventional": "^7.0.1",
+    "@semantic-release/changelog": "^3.0.0",
+    "@semantic-release/git": "^7.0.3",
+    "broccoli-funnel": "^2.0.1",
+    "broccoli-test-helper": "^2.0.0",
+    "chai": "^4.2.0",
+    "commitizen": "^3.0.5",
+    "cz-conventional-changelog": "^2.1.0",
+    "eslint": "^5.1.0",
+    "eslint-config-bbva": "^2.0.0",
+    "husky": "^1.0.0-rc.13",
+    "image-size": "^0.6.3",
+    "istanbul": "^0.4.5",
+    "mocha": "^5.2.0",
+    "semantic-release": "^15.12.2",
+    "travis-deploy-once": "^5.0.9"
+  },
+  "dependencies": {
+    "broccoli-caching-writer": "^3.0.3",
+    "fs-extra": "^7.0.1",
+    "sharp": "^0.21.1",
+    "walk-sync": "^1.0.1"
+  }
+}