Reducer function acc value acc

packages/data-point-codemods/LICENSE

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packages/data-point-codemods/README.md

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+# DataPoint codemods
+
+> Codemods to help upgrade to newer versions of [data-point](https://github.com/ViacomInc/data-point/)
+
+Codemods, or [jscodeshift](https://github.com/facebook/jscodeshift) transforms, are small programs that help automate changes in a codebase. Think of them as search and replace on steroids. 
+
+## Install
+
+Globally install data-point-codemods:
+
+```bash
+$ npm install -g data-point-codemods
+```
+
+This will install a binary `data-point-codemods`.
+
+## Usage
+
+```bash
+data-point-codemods <path> [options]
+```
+
+This tool uses [lib-upgrader](#https://github.com/jfmengels/lib-upgrader) to run the codemods. 
+
+When executed it will ask you about the version you currently are, and the one you wish to upgrade to, after that it will attempt at executing all the codemods to upgrade your code. 
+
+### Help
+
+For help type: 
+
+```bash
+data-point-codemods --help
+```
+
+## Supported codemods
+
+**Upgrading 1.x &rarr; 2.x**
+
+- ([codemod](transforms/reducer-args-acc-to-val-acc.js)) Refactor ReducerFunctions for value as first parameter eg. `(acc)` &rarr; `(input, acc)`. For more info please look at the [input](transforms/__testfixtures__/reducer-args-acc-to-val-acc.input.js)/[output](transforms/__testfixtures__/reducer-args-acc-to-val-acc.output.js) tests.
+
+
+## WARNING
+
+Make sure you backup your files, these tests will overwrite their content. The codemods try to cover the most use cases possible, but there might be cases where they end up breaking your code
+
+## Example of how a run may look: 
+
+```bash
+$ data-point-codemods src/data/
+? What version of data-point are you currently using? older than 2.0.0
+? What version of data-point are you moving to? 2.0.0 (latest)
+
+For similar projects, you may want to run the following command:
+    data-point-codemods --from 0.0.0 --to 2.0.0 "src/data/"
+```

packages/data-point-codemods/data-point-codemods.js

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+#!/usr/bin/env node
+'use strict'
+
+const upgrader = require('lib-upgrader')
+const pkg = require('./package.json')
+const releases = require('./releases.json')
+
+const settings = {
+  libraryName: 'data-point',
+  releases: releases,
+  pkg: pkg,
+  dirname: __dirname
+}
+
+upgrader(settings)
+  .then(upgrader.checkForUpdates)
+  .then(upgrader.checkGitIsClean)
+  .then(upgrader.prompt)
+  .then(upgrader.applyCodemods)
+  .then(upgrader.printTip)
+  .catch(function (err) {
+    console.error(err.message)
+    process.exit(1)
+  })

packages/data-point-codemods/package.json

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+{
+  "name": "data-point-codemods",
+  "version": "1.7.0",
+  "description": "DataPoint Codemods",
+  "license": "Apache-2.0",
+  "engines": {
+    "node": ">=6"
+  },
+  "author": {
+    "name": "Acatl Pacheco",
+    "email": "acatl.pacheco@viacom.com"
+  },
+  "bin":{
+    "data-point-codemods": "data-point-codemods.js"
+  },
+  "dependencies": {
+    "jscodeshift": "0.x",
+    "lodash": "4.x",
+    "lib-upgrader": "1.x"
+  },
+  "keywords": [
+    "data-point",
+    "codemods"
+  ]
+}

packages/data-point-codemods/releases.json

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+[{
+  "version": "2.0.0",
+  "transforms": [
+      "./transforms/reducer-args-acc-to-val-acc.js"
+  ]
+}]

packages/data-point-codemods/transforms/__testfixtures__/reducer-args-acc-to-val-acc.input.js

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+/* eslint-disable */
+/* eslint-disable prettier */
+
+// prettier-ignore
+{
+  // first parameter is not named acc
+  function nonReducer1(foo) {
+    return foo.value
+  }
+
+  // last method is not a function
+  function nonReducer2(acc, next) {
+    return acc.locals
+  }
+
+  // reducers only have 2 params
+  function nonReducer3(acc, next, foo) {
+    return acc.locals
+  }
+
+  // not a reducer either
+  d.transform(1,2).then(acc => {
+    return {
+      a: acc.value,
+      b: acc.value[0],
+      c: acc.value.message.array[0].a,
+      d: `${acc.value.a}`
+    };
+  })
+
+  d.transform(1,2).then(acc => {
+    acc.value
+  })
+
+  // only references acc.value
+  function reducer(acc) {
+    return {
+      a: acc.value,
+      b: acc.value[0],
+      c: acc.value.message.array[0].a,
+      d: `${acc.value.a}`
+    }
+  }
+
+  const exp1 = function reducer(acc) {
+    return acc.value
+  }
+
+  const exp2 = acc => {
+    return acc.value
+  }
+
+  const exp3 = a => b => acc => {
+    return acc.value
+  }
+
+  // references any other property under acc
+  function reducerPromise(acc) {
+    return acc.locals
+  }
+
+  // references any other property under acc
+  function reducerNodeStyle(acc, next) {
+    next(acc.value)
+  }
+}