feat(gatsby) : add createContentDigest helper

docs/docs/source-plugin-tutorial.md

@@ -116,11 +116,10 @@ With the setup done, move on to adding the plugin's functionality.
 Create a new file called `gatsby-node.js` in your `gatsby-source-pixabay` directory, and add the following:
 
 ```js:title=gatsby-node.js
-const crypto = require("crypto")
 const fetch = require("node-fetch")
 const queryString = require("query-string")
 
-exports.sourceNodes = ({ actions, createNodeId }, configOptions) => {
+exports.sourceNodes = ({ actions, createNodeId, createContentDigest }, configOptions) => {
   const { createNode } = actions
 
   // Gatsby adds a configOption that's not needed for this plugin, delete it
@@ -136,15 +135,14 @@ exports.sourceNodes = ({ actions, createNodeId }, configOptions) => {
 What did you do by adding this code? You started by importing the dependencies that you added earlier (along with one built in dependency):
 
 ```js
-const crypto = require("crypto")
 const fetch = require("node-fetch")
 const queryString = require("query-string")
 ```
 
-Then you implemented Gatsby's [`sourceNodes` API](/docs/node-apis/#sourceNodes) which Gatsby will run as part of its bootstrap process. When Gatsby calls `sourceNodes`, it'll pass in some helper functions (`actions` and `createNodeId`) along with any config options that are provided in your project's `gatsby-config.js` file:
+Then you implemented Gatsby's [`sourceNodes` API](/docs/node-apis/#sourceNodes) which Gatsby will run as part of its bootstrap process. When Gatsby calls `sourceNodes`, it'll pass in some helper functions (`actions`, `createNodeId` and `createContentDigest`) along with any config options that are provided in your project's `gatsby-config.js` file:
 
 ```js
-exports.sourceNodes = ({ actions, createNodeId }, configOptions) => {
+exports.sourceNodes = ({ actions, createNodeId, createContentDigest }, configOptions) => {
 ```
 
 You do some initial setup:
@@ -211,9 +209,8 @@ Update `gatsby-node.js` in your `plugins/gatsby-source-pixabay/` directory:
 ```js{11-30}:title=gatsby-node.js
 const fetch = require("node-fetch")
 const queryString = require("query-string")
-const crypto = require("crypto")
 
-exports.sourceNodes = ({ actions, createNodeId }, configOptions) => {
+exports.sourceNodes = ({ actions, createNodeId, createContentDigest }, configOptions) => {
   const { createNode } = actions
 
   // Gatsby adds a configOption that's not needed for this plugin, delete it
@@ -266,14 +263,13 @@ You're ready to add the final step of your plugin - converting this data into a
 
 ### Use `createNode` function
 
-You're adding a helper function on lines 12 to 32 and processing the data into a node on lines 49 to 52:
+You're adding a helper function on lines 11 to 27 and processing the data into a node on lines 44 to 47:
 
-```js{12-32,49-52}:title=gatsby-node.js
+```js{11-27,44-47}:title=gatsby-node.js
 const fetch = require("node-fetch")
 const queryString = require("query-string")
-const crypto = require("crypto")
 
-exports.sourceNodes = ({ actions, createNodeId }, configOptions) => {
+exports.sourceNodes = ({ actions, createNodeId, createContentDigest }, configOptions) => {
   const { createNode } = actions
 
   // Gatsby adds a configOption that's not needed for this plugin, delete it
@@ -283,10 +279,6 @@ exports.sourceNodes = ({ actions, createNodeId }, configOptions) => {
   const processPhoto = photo => {
     const nodeId = createNodeId(`pixabay-photo-${photo.id}`)
     const nodeContent = JSON.stringify(photo)
-    const nodeContentDigest = crypto
-      .createHash("md5")
-      .update(nodeContent)
-      .digest("hex")
 
     const nodeData = Object.assign({}, photo, {
       id: nodeId,
@@ -295,7 +287,7 @@ exports.sourceNodes = ({ actions, createNodeId }, configOptions) => {
       internal: {
         type: `PixabayPhoto`,
         content: nodeContent,
-        contentDigest: nodeContentDigest,
+        contentDigest: createContentDigest(photo),
       },
     })
 

packages/gatsby-transformer-csv/src/__tests__/__snapshots__/gatsby-node.js.snap

@@ -9,7 +9,7 @@ Array [
       "funny": "yup",
       "id": "uuid-from-gatsby",
       "internal": Object {
-        "contentDigest": "5005aee6b2557974cae0aabc712e125a",
+        "contentDigest": "contentDigest",
         "type": "TestCsv",
       },
       "parent": "whatever",
@@ -22,7 +22,7 @@ Array [
       "funny": "nope",
       "id": "uuid-from-gatsby",
       "internal": Object {
-        "contentDigest": "0af87da7e572c2d6d8493bcd642c2c78",
+        "contentDigest": "contentDigest",
         "type": "TestCsv",
       },
       "parent": "whatever",
@@ -41,7 +41,7 @@ Array [
         "funny": "yup",
         "id": "uuid-from-gatsby",
         "internal": Object {
-          "contentDigest": "5005aee6b2557974cae0aabc712e125a",
+          "contentDigest": "contentDigest",
           "type": "TestCsv",
         },
         "parent": "whatever",
@@ -70,7 +70,7 @@ false,\\"nope\\"",
         "funny": "nope",
         "id": "uuid-from-gatsby",
         "internal": Object {
-          "contentDigest": "0af87da7e572c2d6d8493bcd642c2c78",
+          "contentDigest": "contentDigest",
           "type": "TestCsv",
         },
         "parent": "whatever",
@@ -103,7 +103,7 @@ Array [
       "field2": "funny",
       "id": "uuid-from-gatsby",
       "internal": Object {
-        "contentDigest": "49605f5e32a2250d7ca740c5d2e79784",
+        "contentDigest": "contentDigest",
         "type": "TestCsv",
       },
       "parent": "whatever",
@@ -116,7 +116,7 @@ Array [
       "field2": "yup",
       "id": "uuid-from-gatsby",
       "internal": Object {
-        "contentDigest": "2bf0bc0e8539ef5f6bbcf67c8b733233",
+        "contentDigest": "contentDigest",
         "type": "TestCsv",
       },
       "parent": "whatever",
@@ -129,7 +129,7 @@ Array [
       "field2": "nope",
       "id": "uuid-from-gatsby",
       "internal": Object {
-        "contentDigest": "f5f617ce4243d639de924543dec5600e",
+        "contentDigest": "contentDigest",
         "type": "TestCsv",
       },
       "parent": "whatever",
@@ -148,7 +148,7 @@ Array [
         "field2": "funny",
         "id": "uuid-from-gatsby",
         "internal": Object {
-          "contentDigest": "49605f5e32a2250d7ca740c5d2e79784",
+          "contentDigest": "contentDigest",
           "type": "TestCsv",
         },
         "parent": "whatever",
@@ -177,7 +177,7 @@ false,nope",
         "field2": "yup",
         "id": "uuid-from-gatsby",
         "internal": Object {
-          "contentDigest": "2bf0bc0e8539ef5f6bbcf67c8b733233",
+          "contentDigest": "contentDigest",
           "type": "TestCsv",
         },
         "parent": "whatever",
@@ -206,7 +206,7 @@ false,nope",
         "field2": "nope",
         "id": "uuid-from-gatsby",
         "internal": Object {
-          "contentDigest": "f5f617ce4243d639de924543dec5600e",
+          "contentDigest": "contentDigest",
           "type": "TestCsv",
         },
         "parent": "whatever",

packages/gatsby-transformer-csv/src/__tests__/gatsby-node.js

@@ -30,12 +30,14 @@ describe(`Process  nodes correctly`, () => {
     const actions = { createNode, createParentChildLink }
     const createNodeId = jest.fn()
     createNodeId.mockReturnValue(`uuid-from-gatsby`)
+    const createContentDigest = jest.fn().mockReturnValue(`contentDigest`)
 
     await onCreateNode({
       node,
       loadNodeContent,
       actions,
       createNodeId,
+      createContentDigest,
     }).then(() => {
       expect(createNode.mock.calls).toMatchSnapshot()
       expect(createParentChildLink.mock.calls).toMatchSnapshot()
@@ -52,13 +54,15 @@ describe(`Process  nodes correctly`, () => {
     const actions = { createNode, createParentChildLink }
     const createNodeId = jest.fn()
     createNodeId.mockReturnValue(`uuid-from-gatsby`)
+    const createContentDigest = jest.fn().mockReturnValue(`contentDigest`)
 
     await onCreateNode(
       {
         node,
         loadNodeContent,
         actions,
         createNodeId,
+        createContentDigest,
       },
       { noheader: true }
     ).then(() => {

packages/gatsby-transformer-csv/src/gatsby-node.js

@@ -1,7 +1,6 @@
 const Promise = require(`bluebird`)
 const csv = require(`csvtojson`)
 const _ = require(`lodash`)
-const crypto = require(`crypto`)
 
 const convertToJson = (data, options) =>
   new Promise((res, rej) => {
@@ -16,7 +15,7 @@ const convertToJson = (data, options) =>
   })
 
 async function onCreateNode(
-  { node, actions, loadNodeContent, createNodeId },
+  { node, actions, loadNodeContent, createNodeId, createContentDigest },
   options
 ) {
   const { createNode, createParentChildLink } = actions
@@ -31,19 +30,14 @@ async function onCreateNode(
 
   if (_.isArray(parsedContent)) {
     const csvArray = parsedContent.map((obj, i) => {
-      const objStr = JSON.stringify(obj)
-      const contentDigest = crypto
-        .createHash(`md5`)
-        .update(objStr)
-        .digest(`hex`)
 
       return {
         ...obj,
         id: obj.id ? obj.id : createNodeId(`${node.id} [${i}] >>> CSV`),
         children: [],
         parent: node.id,
         internal: {
-          contentDigest,
+          contentDigest: createContentDigest(obj),
           // TODO make choosing the "type" a lot smarter. This assumes
           // the parent node is a file.
           // PascalCase

packages/gatsby-transformer-json/src/__tests__/__snapshots__/gatsby-node.js.snap

@@ -9,7 +9,7 @@ Array [
       "funny": "yup",
       "id": "foo",
       "internal": Object {
-        "contentDigest": "8838e569ae02d98806532310fb2a577a",
+        "contentDigest": "contentDigest",
         "type": "FooJson",
       },
       "parent": "whatever",
@@ -28,7 +28,7 @@ Array [
         "funny": "yup",
         "id": "foo",
         "internal": Object {
-          "contentDigest": "8838e569ae02d98806532310fb2a577a",
+          "contentDigest": "contentDigest",
           "type": "FooJson",
         },
         "parent": "whatever",
@@ -60,7 +60,7 @@ Array [
       "funny": "yup",
       "id": "foo",
       "internal": Object {
-        "contentDigest": "8838e569ae02d98806532310fb2a577a",
+        "contentDigest": "contentDigest",
         "type": "NotFileJson",
       },
       "parent": "whatever",
@@ -79,7 +79,7 @@ Array [
         "funny": "yup",
         "id": "foo",
         "internal": Object {
-          "contentDigest": "8838e569ae02d98806532310fb2a577a",
+          "contentDigest": "contentDigest",
           "type": "NotFileJson",
         },
         "parent": "whatever",
@@ -109,7 +109,7 @@ Array [
       "funny": "yup",
       "id": "foo",
       "internal": Object {
-        "contentDigest": "8838e569ae02d98806532310fb2a577a",
+        "contentDigest": "contentDigest",
         "type": "NodeNameJson",
       },
       "parent": "whatever",
@@ -122,7 +122,7 @@ Array [
       "funny": "nope",
       "id": "uuid-from-gatsby",
       "internal": Object {
-        "contentDigest": "f624311d932d73dcd416d2a8bea2b67d",
+        "contentDigest": "contentDigest",
         "type": "NodeNameJson",
       },
       "parent": "whatever",
@@ -141,7 +141,7 @@ Array [
         "funny": "yup",
         "id": "foo",
         "internal": Object {
-          "contentDigest": "8838e569ae02d98806532310fb2a577a",
+          "contentDigest": "contentDigest",
           "type": "NodeNameJson",
         },
         "parent": "whatever",
@@ -169,7 +169,7 @@ Array [
         "funny": "nope",
         "id": "uuid-from-gatsby",
         "internal": Object {
-          "contentDigest": "f624311d932d73dcd416d2a8bea2b67d",
+          "contentDigest": "contentDigest",
           "type": "NodeNameJson",
         },
         "parent": "whatever",
@@ -201,7 +201,7 @@ Array [
       "funny": "yup",
       "id": "foo",
       "internal": Object {
-        "contentDigest": "8838e569ae02d98806532310fb2a577a",
+        "contentDigest": "contentDigest",
         "type": "NotFileJson",
       },
       "parent": "whatever",
@@ -214,7 +214,7 @@ Array [
       "funny": "nope",
       "id": "uuid-from-gatsby",
       "internal": Object {
-        "contentDigest": "f624311d932d73dcd416d2a8bea2b67d",
+        "contentDigest": "contentDigest",
         "type": "NotFileJson",
       },
       "parent": "whatever",
@@ -233,7 +233,7 @@ Array [
         "funny": "yup",
         "id": "foo",
         "internal": Object {
-          "contentDigest": "8838e569ae02d98806532310fb2a577a",
+          "contentDigest": "contentDigest",
           "type": "NotFileJson",
         },
         "parent": "whatever",
@@ -259,7 +259,7 @@ Array [
         "funny": "nope",
         "id": "uuid-from-gatsby",
         "internal": Object {
-          "contentDigest": "f624311d932d73dcd416d2a8bea2b67d",
+          "contentDigest": "contentDigest",
           "type": "NotFileJson",
         },
         "parent": "whatever",

packages/gatsby-transformer-json/src/__tests__/gatsby-node.js

@@ -11,13 +11,15 @@ const bootstrapTest = async (node, pluginOptions = {}) => {
   const actions = { createNode, createParentChildLink }
   const createNodeId = jest.fn()
   createNodeId.mockReturnValue(`uuid-from-gatsby`)
+  const createContentDigest = jest.fn().mockReturnValue(`contentDigest`)
 
   return await onCreateNode(
     {
       node,
       loadNodeContent,
       actions,
       createNodeId,
+      createContentDigest,
     },
     pluginOptions
   ).then(() => {

packages/gatsby-transformer-json/src/gatsby-node.js

@@ -1,9 +1,8 @@
 const _ = require(`lodash`)
-const crypto = require(`crypto`)
 const path = require(`path`)
 
 async function onCreateNode(
-  { node, actions, loadNodeContent, createNodeId },
+  { node, actions, loadNodeContent, createNodeId, createContentDigest },
   pluginOptions
 ) {
   function getType({ node, object, isArray }) {
@@ -21,18 +20,13 @@ async function onCreateNode(
   }
 
   function transformObject(obj, id, type) {
-    const objStr = JSON.stringify(obj)
-    const contentDigest = crypto
-      .createHash(`md5`)
-      .update(objStr)
-      .digest(`hex`)
     const jsonNode = {
       ...obj,
       id,
       children: [],
       parent: node.id,
       internal: {
-        contentDigest,
+        contentDigest: createContentDigest(obj),
         type,
       },
     }