Support lowercase environment variables to make npm config working.

[abcfy2]

Current behavior

npm config set CYPRESS_DOWNLOAD_PATH_TEMPLATE 'https://cdn.npmmirror.com/binaries/cypress/${version}/${platform}-${arch}/cypress.zip' not working in current behavior.

npm config set CYPRESS_DOWNLOAD_PATH_TEMPLATE 'https://cdn.npmmirror.com/binaries/cypress/${version}/${platform}-${arch}/cypress.zip'
DEBUG='cypress:*' npm i cypress

You can see download is still https://download.cypress.io/desktop/10.11.0?platform=linux&arch=x64

Desired behavior

npm config set will inject lowercase environment variables.

E.g: npm config set CYPRESS_DOWNLOAD_PATH_TEMPLATE 'https://cdn.npmmirror.com/binaries/cypress/${version}/${platform}-${arch}/cypress.zip' will inject:

npm_config_cypress_download_path_template=https://cdn.npmmirror.com/binaries/cypress/${version}/${platform}-${arch}/cypress.zip

So I think

cypress/cli/lib/util.js

Lines 532 to 564 in d52e610

	getEnv (varName, trim) {
	la(is.unemptyString(varName), 'expected environment variable name, not', varName)
	const configVarName = `npm_config_${varName}`
	const packageConfigVarName = `npm_package_config_${varName}`
	let result
	if (process.env.hasOwnProperty(varName)) {
	debug(`Using ${varName} from environment variable`)
	result = process.env[varName]
	} else if (process.env.hasOwnProperty(configVarName)) {
	debug(`Using ${varName} from npm config`)
	result = process.env[configVarName]
	} else if (process.env.hasOwnProperty(packageConfigVarName)) {
	debug(`Using ${varName} from package.json config`)
	result = process.env[packageConfigVarName]
	}
	// environment variables are often set double quotes to escape characters
	// and on Windows it can lead to weird things: for example
	// set FOO="C:\foo.txt" && node -e "console.log('>>>%s<<<', process.env.FOO)"
	// will print
	// >>>"C:\foo.txt" <<<
	// see https://github.com/cypress-io/cypress/issues/4506#issuecomment-506029942
	// so for sanity sake we should first trim whitespace characters and remove
	// double quotes around environment strings if the caller is expected to
	// use this environment string as a file path
	return trim ? dequote(_.trim(result)) : result
	},

Should also support lowercase environment variables.

Test code to reproduce

npm config set CYPRESS_DOWNLOAD_PATH_TEMPLATE 'https://cdn.npmmirror.com/binaries/cypress/${version}/${platform}-${arch}/cypress.zip'
DEBUG='cypress:*' npm i cypress

Cypress Version

10.11.0

Node version

18

Operating System

Linux

Debug Logs

(##################) ⠧ reify:cypress: timing reifyNode:node_modules/lodash Completed in 1475ms
> cypress@10.11.0 postinstall
> node index.js --exec install

  cypress:cli installing Cypress from NPM +0msyNode:node_modules/cypress Completed in 1495ms
  cypress:cli installing with options {} +0msfyNode:node_modules/cypress Completed in 1495ms
  cypress:cli detecting arch { osPlatform: 'linux', osArch: 'x64' } +0ms
  cypress:cli arm uname -m result: { stdout: 'x86_64' }  +34mses/cypress Completed in 1495ms
  cypress:cli version in package.json is 10.11.0, version to install is 10.11.0 +35ms
  cypress:cli Reading binary package.json from: /home/fengyu/.cache/Cypress/10.11.0/Cypress/resources/app/package.json +0ms
  cypress:cli no binary installed under cli version +16ms
  cypress:cli checking local file /tmp/tmp/10.11.0 cwd /tmp/tmp/node_modules/cypress +1ms
  cypress:cli preparing to download and unzip version  10.11.0 to path /home/fengyu/.cache/Cypress/10.11.0 +0ms
Installing Cypress (version: 10.11.0)


  cypress:cli needed Cypress version: 10.11.0 +0ms
  cypress:cli source url https://download.cypress.io/desktop/10.11.0?platform=linux&arch=x64 +1ms
  cypress:cli downloading cypress.zip to "/tmp/cypress-17897.zip" +0ms
  cypress:cli Downloading package {
  url: 'https://download.cypress.io/desktop/10.11.0?platform=linux&arch=x64',
  proxy: null,
  downloadDestination: '/tmp/cypress-17897.zip'
} +7ms
  cypress:cli expected file size 82 +1sng reifyNode:node_modules/cypress Completed in 1495ms
  cypress:cli redirect version: 10.11.0 +0ms
  cypress:cli redirect url: https://cdn.cypress.io/desktop/10.11.0/linux-x64/cypress.zip +0ms
  cypress:cli Downloading package {
  url: 'https://cdn.cypress.io/desktop/10.11.0/linux-x64/cypress.zip',
  proxy: null,
  downloadDestination: '/tmp/cypress-17897.zip'
} +1ms
  cypress:cli expected checksum c33b2a3eba0277da47274aff2e7a4e618531977355951d6f078ebd313d0a25d1807d6f5c30ccac19f0c292a1093f0494eb963e7e9a9db784fba41bd06b77567e +675ms

### Other

_No response_