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fix(gatsby): workaround some webpack issues causing first save after running gatsby develop to not have any effect #30193

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Merged
merged 4 commits into from
Mar 11, 2021
Merged

fix(gatsby): workaround some webpack issues causing first save after running gatsby develop to not have any effect #30193

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4ec2863
fix(gatsby): wokraround some webpack issues causing first save after …
pieh Mar 11, 2021
bb45125
adjust unit tests to mock extra fs method
pieh Mar 11, 2021
996c4ec
Update packages/gatsby/src/utils/gatsby-webpack-virtual-modules.ts
pieh Mar 11, 2021
2cacaca
format
pieh Mar 11, 2021
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1 change: 1 addition & 0 deletions packages/gatsby/src/bootstrap/__tests__/requires-writer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@ const generatePagesState = pages => {
jest.mock(`fs-extra`, () => {
return {
writeFile: () => Promise.resolve(),
outputFileSync: () => {},
move: () => {},
}
})
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5 changes: 5 additions & 0 deletions packages/gatsby/src/utils/gatsby-webpack-virtual-modules.ts
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
import VirtualModulesPlugin from "webpack-virtual-modules"
import * as path from "path"
import * as fs from "fs-extra"
/*
* This module allows creating virtual (in memory only) modules / files
* that webpack compilation can access without the need to write module
Expand Down Expand Up @@ -46,6 +47,10 @@ export function writeModule(filePath: string, fileContents: string): void {
return
}

// workaround webpack marking virtual modules as deleted because those files don't really exist
// so we create those files just so watchpack doesn't mark them as initially missing
fs.outputFileSync(adjustedFilePath, fileContents)

fileContentLookup[adjustedFilePath] = fileContents

instances.forEach(instance => {
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9 changes: 5 additions & 4 deletions packages/gatsby/src/utils/start-server.ts
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Expand Up @@ -78,6 +78,11 @@ export async function startServer(
})
webpackActivity.start()

// loading indicator
// write virtual module always to not fail webpack compilation, but only add express route handlers when
// query on demand is enabled and loading indicator is not disabled
writeVirtualLoadingIndicatorModule()

const THIRTY_SECONDS = 30 * 1000
let cancelDevJSNotice: CancelExperimentNoticeCallbackOrUndefined
if (
Expand Down Expand Up @@ -486,10 +491,6 @@ module.exports = {
route({ app, program, store })
}

// loading indicator
// write virtual module always to not fail webpack compilation, but only add express route handlers when
// query on demand is enabled and loading indicator is not disabled
writeVirtualLoadingIndicatorModule()
if (
process.env.GATSBY_EXPERIMENTAL_QUERY_ON_DEMAND &&
process.env.GATSBY_QUERY_ON_DEMAND_LOADING_INDICATOR === `true`
Expand Down