chore: add rollup-plugin-dsv (#22)

packages/dsv/CHANGELOG.md

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+# rollup-plugin-dsv changelog
+
+## 1.2.0
+
+* Pass `id` to `processRow`
+
+## 1.1.2
+
+* Return a `name`
+
+## 1.1.1
+
+* Add missing dependencies
+
+## 1.1.0
+
+* Support `options.processRow`
+
+## 1.0.1
+
+* Include correct files in package
+
+## 1.0.0
+
+* First release

packages/dsv/README.md

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+[cover]: https://codecov.io/gh/rollup/plugins/replace/branch/master/graph/badge.svg
+[cover-url]: https://codecov.io/gh/rollup/plugins
+[size]: https://packagephobia.now.sh/badge?p=@rollup/plugin-dsv
+[size-url]: https://packagephobia.now.sh/result?p=@rollup/plugin-dsv
+[tests]: https://img.shields.io/circleci/project/github/rollup/plugins.svg
+[tests-url]: https://circleci.com/gh/rollup/plugins
+
+[![tests][tests]][tests-url]
+[![cover][cover]][cover-url]
+[![size][size]][size-url]
+[![libera manifesto](https://img.shields.io/badge/libera-manifesto-lightgrey.svg)](https://liberamanifesto.com)
+
+# @rollup/plugin-dsv
+
+🍣 A Rollup plugin which converts `.csv` and `.tsv` files into JavaScript modules with [d3-dsv](https://github.com/d3/d3-dsv).
+
+WebAssembly Modules are imported asynchronous as base64 strings. Small modules [can be imported synchronously](#synchronous-modules).
+
+## Requirements
+
+This plugin requires an [LTS](https://github.com/nodejs/Release) Node version (v8.0.0+) and Rollup v1.20.0+.
+
+## Install
+
+Using npm:
+
+```console
+npm install @rollup/plugin-dsv --save-dev
+```
+
+## Usage
+
+Create a `rollup.config.js` [configuration file](https://www.rollupjs.org/guide/en/#configuration-files) and import the plugin:
+
+```js
+import dsv from '@rollup/plugin-dsv';
+
+export default {
+  input: 'src/index.js',
+  output: {
+    dir: 'output',
+    format: 'cjs'
+  },
+  plugins: [dsv()]
+};
+```
+
+Then call `rollup` either via the [CLI](https://www.rollupjs.org/guide/en/#command-line-reference) or the [API](https://www.rollupjs.org/guide/en/#javascript-api).
+
+## Practical Example
+
+Suppose that you have a CSV (or TSV!) file which contains some information on delicious fruits:
+
+```csv
+type,count
+apples,7
+pears,4
+bananas,5
+```
+
+And suppose you'd like to import that CSV as an `Array` within some part of your code. After adding the plugin (as shown above), you may `import` (or `require`) the CSV file directly. The import will provide an `Array` of `Objects` representing rows from the CSV file:
+
+```js
+import fruit from './fruit.csv';
+
+console.log(fruit);
+// [
+//   { type: 'apples', count: '7' },
+//   { type: 'pears', count: '4' },
+//   { type: 'bananas', count: '5' }
+// ]
+```
+
+## Options
+
+### `processRow`
+
+Type: `Function`<br>
+Default: `null`
+
+Specifies a function which processes each row in the parsed array. The function can either manipulate the passed `row`, or return an entirely new row object.
+
+This option could be used for converting numeric `string` values into `Number` values. – for example turning numeric values into numbers, e.g.
+
+```js
+dsv({
+  processRow: (row, id) => {
+    Object.keys(row).forEach(key => {
+      var value = row[key];
+      row[key] = isNaN(+value) ? value : +value;
+    });
+  }
+});
+```
+
+## Meta
+
+[CONTRIBUTING](./.github/CONTRIBUTING.md)
+
+[LICENSE (MIT)](./LICENSE)

packages/dsv/package.json

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+{
+  "name": "@rollup/plugin-dsv",
+  "version": "2.0.0",
+  "description": "Convert .csv and .tsv files into JavaScript modules with d3-dsv",
+  "license": "MIT",
+  "repository": "rollup/plugins",
+  "author": "Rich Harris",
+  "homepage": "https://github.com/rollup/plugins",
+  "bugs": "https://github.com/rollup/plugins/issues",
+  "main": "dist/index.js",
+  "scripts": {
+    "build": "rollup -c",
+    "ci:coverage": "nyc pnpm run test && nyc report --reporter=text-lcov > coverage.lcov",
+    "ci:coverage:submit": "curl -s https://codecov.io/bash | bash -s - -F dsv",
+    "ci:lint": "pnpm run build && pnpm run lint && pnpm run security",
+    "ci:lint:commits": "commitlint --from=${CIRCLE_BRANCH} --to=${CIRCLE_SHA1}",
+    "ci:test": "pnpm run test -- --verbose",
+    "lint": "pnpm run lint:js && pnpm run lint:docs && pnpm run lint:package",
+    "lint:docs": "prettier --single-quote --write README.md",
+    "lint:js": "eslint --fix --cache src test",
+    "lint:package": "prettier --write package.json --plugin=prettier-plugin-package",
+    "prebuild": "del-cli dist",
+    "prepare": "npm run build",
+    "prepublishOnly": "npm run lint",
+    "pretest": "npm run build",
+    "security": "echo 'pnpm needs `npm audit` support'",
+    "test": "ava"
+  },
+  "files": [
+    "dist",
+    "README.md",
+    "LICENSE"
+  ],
+  "dependencies": {
+    "d3-dsv": "^0.1.14",
+    "rollup-pluginutils": "^2.8.2",
+    "tosource": "^1.0.0"
+  },
+  "devDependencies": {
+    "del-cli": "^3.0.0",
+    "rollup": "^1.20.0"
+  },
+  "ava": {
+    "files": [
+      "!**/fixtures/**",
+      "!**/helpers/**",
+      "!**/recipes/**",
+      "!**/types.ts"
+    ]
+  },
+  "jsnext:main": "dist/index.es.js",
+  "module": "dist/index.es.js"
+}

packages/dsv/rollup.config.js

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+import pkg from './package.json';
+
+export default {
+  input: 'src/index.js',
+  output: [{ file: pkg.main, format: 'cjs' }, { file: pkg.module, format: 'es' }]
+};

packages/dsv/src/index.js

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+import { extname } from 'path';
+
+import { csv, tsv } from 'd3-dsv';
+import toSource from 'tosource';
+import { createFilter } from 'rollup-pluginutils';
+
+const parsers = { '.csv': csv, '.tsv': tsv };
+
+export default function dsv(options = {}) {
+  const filter = createFilter(options.include, options.exclude);
+
+  return {
+    name: 'dsv',
+
+    transform(code, id) {
+      if (!filter(id)) return null;
+
+      const ext = extname(id);
+      if (!(ext in parsers)) return null;
+
+      let rows = parsers[ext].parse(code);
+
+      if (options.processRow) {
+        rows = rows.map((row) => options.processRow(row, id) || row);
+      }
+
+      return {
+        code: `export default ${toSource(rows)};`,
+        map: { mappings: '' }
+      };
+    }
+  };
+}

packages/dsv/test/fixtures/.eslintrc

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+{
+  "globals": {
+    "t": "readonly"
+  }
+}

packages/dsv/test/fixtures/basic-csv/fruit.csv

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+type,count
+apples,7
+pears,4
+bananas,5

packages/dsv/test/fixtures/basic-csv/main.js

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+import fruit from './fruit.csv';
+
+t.deepEqual(fruit, [
+  { type: 'apples', count: '7' },
+  { type: 'pears', count: '4' },
+  { type: 'bananas', count: '5' }
+]);

packages/dsv/test/fixtures/basic-tsv/fruit.tsv

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+type	count
+apples	7
+pears	4
+bananas	5

packages/dsv/test/fixtures/basic-tsv/main.js

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+import fruit from './fruit.tsv';
+
+t.deepEqual(fruit, [
+  { type: 'apples', count: '7' },
+  { type: 'pears', count: '4' },
+  { type: 'bananas', count: '5' }
+]);

packages/dsv/test/fixtures/process-id/lower.csv

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+type,count
+Apples,7
+Pears,4
+Bananas,5

packages/dsv/test/fixtures/process-id/main.js

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+import lower from './lower.csv';
+import upper from './upper.csv';
+
+t.deepEqual(lower, [
+  { type: 'apples', count: 7 },
+  { type: 'pears', count: 4 },
+  { type: 'bananas', count: 5 }
+]);
+
+t.deepEqual(upper, [
+  { type: 'APPLES', count: 7 },
+  { type: 'PEARS', count: 4 },
+  { type: 'BANANAS', count: 5 }
+]);

packages/dsv/test/fixtures/process-id/upper.csv

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+type,count
+Apples,7
+Pears,4
+Bananas,5

packages/dsv/test/fixtures/process/fruit.csv

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+type,count
+apples,7
+pears,4
+bananas,5

packages/dsv/test/fixtures/process/main.js

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+import fruit from './fruit.csv';
+
+t.deepEqual(fruit, [
+  { type: 'apples', count: 7 },
+  { type: 'pears', count: 4 },
+  { type: 'bananas', count: 5 }
+]);

packages/dsv/test/test.js

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+const test = require('ava');
+const { rollup } = require('rollup');
+
+const dsv = require('..');
+
+process.chdir(__dirname);
+
+const testBundle = async (t, bundle) => {
+  const { output } = await bundle.generate({ format: 'cjs' });
+  const [{ code }] = output;
+  const func = new Function('t', code); // eslint-disable-line no-new-func
+
+  return func(t);
+};
+
+test('converts a csv file', async (t) => {
+  const bundle = await rollup({
+    input: 'fixtures/basic-csv/main.js',
+    plugins: [dsv()]
+  });
+  t.plan(1);
+  return testBundle(t, bundle);
+});
+
+test('converts a tsv file', async (t) => {
+  const bundle = await rollup({
+    input: 'fixtures/basic-tsv/main.js',
+    plugins: [dsv()]
+  });
+  t.plan(1);
+  return testBundle(t, bundle);
+});
+
+test('uses a custom processor', async (t) => {
+  const parse = (value) => (isNaN(+value) ? value : +value);
+
+  const bundle = await rollup({
+    input: 'fixtures/process/main.js',
+    plugins: [
+      dsv({
+        processRow(row) {
+          Object.keys(row).forEach((key) => {
+            row[key] = parse(row[key]); // eslint-disable-line no-param-reassign
+          });
+        }
+      })
+    ]
+  });
+  t.plan(1);
+  return testBundle(t, bundle);
+});
+
+test('uses a custom processor with id', async (t) => {
+  const bundle = await rollup({
+    input: 'fixtures/process-id/main.js',
+    plugins: [
+      dsv({
+        processRow(row, id) {
+          return {
+            type: row.type[/lower/.test(id) ? 'toLowerCase' : 'toUpperCase'](),
+            count: +row.count
+          };
+        }
+      })
+    ]
+  });
+  t.plan(2);
+  return testBundle(t, bundle);
+});