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[Bug] Syntax error in parsing package.json run scripts with env variable using ' prefixed

See original GitHub issue

via @duncanhealy here

Bug description

package.json scripts fail to run if they have environment variables prefixed to the command that use single ticks '

Command

yarn start
yarn build

What is the current behavior?

yarn 1.x parses package.json correctly yarn 2.0.0-rc.27 parses package.json and fails with a syntax error below

Syntax Error: Expected "\\" or [^'] but "'" found (line 1, column 8).
    at Xe (/home/username/.nvm/versions/node/v12.14.1/lib/node_modules/yarn/bin/yarn.js:36:319549)
    at Object.parse (/home/username/.nvm/versions/node/v12.14.1/lib/node_modules/yarn/bin/yarn.js:36:328727)
    at Object.t.parseShell (/home/username/.nvm/versions/node/v12.14.1/lib/node_modules/yarn/bin/yarn.js:36:314751)
    at Object.t.execute (/home/username/.nvm/versions/node/v12.14.1/lib/node_modules/yarn/bin/yarn.js:24:16165)
    at B.r.configuration.reduceHook.script (/home/username/.nvm/versions/node/v12.14.1/lib/node_modules/yarn/bin/yarn.js:24:5026)
    at Object.B [as executePackageScript] (/home/username/.nvm/versions/node/v12.14.1/lib/node_modules/yarn/bin/yarn.js:24:5159)
    at async c.execute (/home/username/.nvm/versions/node/v12.14.1/lib/node_modules/yarn/bin/yarn.js:58:43949)
    at async c.validateAndExecute (/home/username/.nvm/versions/node/v12.14.1/lib/node_modules/yarn/bin/yarn.js:24:40434)
    at async c.run (/home/username/.nvm/versions/node/v12.14.1/lib/node_modules/yarn/bin/yarn.js:36:533800)
    at async s.execute (/home/username/.nvm/versions/node/v12.14.1/lib/node_modules/yarn/bin/yarn.js:58:17806)

What is the expected behavior?

yarn start, build … should parse and run scripts set by scripts block in package.json

Steps to Reproduce

package.json file --> set DEBUG variable to empty / -babel

  "scripts": {
    "start": "DEBUG='-babel' BROWSER=none react-scripts start",
    "build": "DEBUG='' react-scripts build"
}

Workaround

change single ticks ' to \" in scripts

Environment

Node Version: 12.14.1
Yarn v2 Version: 2.0.0-rc.27
OS and version:

Issue Analytics

State:
Created 4 years ago
Comments:6 (1 by maintainers)

Top GitHub Comments

3reactions

fleckcommented, Feb 3, 2020

I’m having a similar package.json parsing issue: trying to run this script "temp": "cross-env TS_NODE_COMPILER_OPTIONS={\\\"module\\\":\\\"commonjs\\\"} webpack", results in

yarn temp
Syntax Error: Expected "$", "$(", "${", "&&", "'", ";", "<", "<<<", ">", ">>", "\"", "\\", "|", "|&", "||", [ \t], or end of input but "{" found (line 1, column 36).
    at Xe (/usr/local/lib/node_modules/yarn/bin/yarn.js:36:319549)
    at Object.parse (/usr/local/lib/node_modules/yarn/bin/yarn.js:36:328727)
    at Object.t.parseShell (/usr/local/lib/node_modules/yarn/bin/yarn.js:36:314751)
    at Object.t.execute (/usr/local/lib/node_modules/yarn/bin/yarn.js:24:16165)
    at B.r.configuration.reduceHook.script (/usr/local/lib/node_modules/yarn/bin/yarn.js:24:5026)
    at Object.B [as executePackageScript] (/usr/local/lib/node_modules/yarn/bin/yarn.js:24:5159)
    at async c.execute (/usr/local/lib/node_modules/yarn/bin/yarn.js:58:43949)
    at async c.validateAndExecute (/usr/local/lib/node_modules/yarn/bin/yarn.js:24:40434)
    at async c.run (/usr/local/lib/node_modules/yarn/bin/yarn.js:36:533800)
    at async s.execute (/usr/local/lib/node_modules/yarn/bin/yarn.js:58:17806)

yarn version: 2.0.0-rc.27

2reactions

larixercommented, Apr 2, 2020

@FredrikAugust Another workaround is "lint": "eslint 'src/**/*.{tsx,ts}'"