yarnpkg/yarn

Yarn install should warn or replace when old version are already installed

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#3807 opened on Jul 3, 2017

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Description

Do you want to request a feature or report a bug? bug

What is the current behavior? Installed yarn has version 0.24.6 instead of 0.27.5 through some package providers (Debian repositories, shell script, npm).

If the current behavior is a bug, please provide the steps to reproduce. docker run --rm -it node "curl -o- -L https://yarnpkg.com/install.sh | bash && yarn --version" outputs the following latest lines:

> Successfully installed Yarn 0.27.5! Please open another terminal where the `yarn` command will now be available.
0.24.6

What is the expected behavior? Last line should output 0.27.5.

Please mention your node.js, yarn and operating system version. From node docker image:

# node -v
v8.1.2
# uname -r
4.9.0-3-amd64
# cat /etc/issue
Debian GNU/Linux 8 \n \l

Contributor guide

Tech stack
javascriptnodejsshell
Domain
clideveloper experiencetooling
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
basic shell scriptingNode.js environmentfamiliarity with yarn install
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50
Research direction
Examine the install script (likely `install.sh`) to understand how it detects and replaces existing yarn installations. The issue shows that after running the script, the old version remains. Focus on the version check and replacement logic. Check the repository's issues and comments for any related discussion or proposed fixes.