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Don't use yarn if a package-lock.json file is found #31926

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merged 3 commits into from Feb 5, 2022
Merged

Don't use yarn if a package-lock.json file is found #31926

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5f7ea0d
Don't use yarn if a package-lock.json file is found
thibautsabot Nov 29, 2021
6472406
use baseDir to find lock files
thibautsabot Nov 29, 2021
ed3265c
Merge branch 'canary' into dont-use-yarn-if-package-lock
kodiakhq[bot] Feb 5, 2022
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11 changes: 9 additions & 2 deletions packages/next/lib/helpers/should-use-yarn.ts
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@@ -1,13 +1,20 @@
import { execSync } from 'child_process'
import fs from 'fs'

export function shouldUseYarn(): boolean {
try {
const userAgent = process.env.npm_config_user_agent
if (userAgent) {
return Boolean(userAgent && userAgent.startsWith('yarn'))
} else {
if (fs.existsSync('yarn.lock')) {
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return true
} else if (fs.existsSync('package-lock.json')) {
return false
}
execSync('yarnpkg --version', { stdio: 'ignore' })
return true
}
execSync('yarnpkg --version', { stdio: 'ignore' })
return true
} catch (e) {
return false
}
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