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`init newproject --template` modifying `react-native.config.js` causes error and yarn isn't used by default about cli HOT 4 CLOSED

pnthach95 commented on May 25, 2024

`init newproject --template` modifying `react-native.config.js` causes error and yarn isn't used by default

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Comments (4)

szymonrybczak commented on May 25, 2024

Hey, that's really strange, but anyway we deleted creating react-native.config.js in #2203, so starting with 0.73.1 this issue shouldn't exist anymore.

Also, yarn isn't used by default as document stated. It can be reproduced without --template

Can you confirm that yarn --version correctly returns a version of Yarn in the directory that you want to create project?

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pnthach95 commented on May 25, 2024

Hi @szymonrybczak, I recorded reproducible video about yarn issue

Screen.Recording.2023-12-18.at.7.13.59.PM.mov

yarn v1.22.21 with [email protected] just released

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szymonrybczak commented on May 25, 2024

@pnthach95 okay, I looked into the code and actually in the first place we're looking for npm_config_user_agent, and then we have fallback to Yarn 😅

cli/packages/cli/src/commands/init/init.ts

Lines 331 to 347 in 2fc5965

 function userAgentPackageManager() { 

 const userAgent = process.env.npm_config_user_agent; 

 if (userAgent) { 

 if (userAgent.startsWith('yarn')) { 

 return 'yarn'; 

 } 

 if (userAgent.startsWith('npm')) { 

 return 'npm'; 

 } 

 if (userAgent.startsWith('bun')) { 

 return 'bun'; 

 } 

 } 

 return null; 

 }

So probably some tool changed that env variable in your setup and that's why packages are installed with npm right now.
I'm going to update docs to reflect current change. Btw you can also pass --pm yarn to force Yarn usage.

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pnthach95 commented on May 25, 2024

Before 0.73, yarn is the default package manager. So, it's going to be fixed or it just works as intended? Is there a "changing npm_config_user_agent to yarn" guide?

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`init newproject --template` modifying `react-native.config.js` causes error and yarn isn't used by default about cli HOT 4 CLOSED

Comments (4)

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	function userAgentPackageManager() {
	const userAgent = process.env.npm_config_user_agent;

	if (userAgent) {
	if (userAgent.startsWith('yarn')) {
	return 'yarn';
	}
	if (userAgent.startsWith('npm')) {
	return 'npm';
	}
	if (userAgent.startsWith('bun')) {
	return 'bun';
	}
	}

	return null;
	}