keep composer 1 & 2 both in same machine

Question

How we can use composer 1 & composer 2 both in the same machine. As a developer we worked on the multiple project in the same machine and situation comes where project 1 required composer 1 and project 2 required compower version 2.

Lynden

Welcome to SO. In this case you better ask your question first like How to keep composer 1 & 2 both in same machine? and then add your answer and accept it. – Ludwigshafen

thanks for the suggestion, i will follow the same. – Lynden

Answer 1

This is what I used to have composer 1 & 2 both in the same machine. I am hoping this will helpful for someone, who want to use composer 1 & 2 both as separate command

Keep Composer 1 & 2 as separate command

Setup Composer 1:

1. Copy the current composer directory to new

   cp `which composer` /usr/local/bin/composer1
   

2. Update it to version 1:

   composer1 self-update --1
   

Upgrade to Composer 2 & create alias:

1. Update composer to version 2

   composer self-update --2
   

2. Create symlink for composer2 (optional)

   ln -s `which composer` /usr/local/bin/composer2
   

Now you can use composer or composer2 command for the project dependent on composer 2 and composer1 command for the project have dependency on composer 1.

Note: you might required to use sudo before the command

Lynden

Answer 2

for windows do the following steps:

• one -> (create composer1 directory in C:\composer_path)

• two -> (copy three file in composer directory to composer1 directory)

• three -> (set path composer1 to environment variable)

• four -> (run composer1 self-update --1 in cmd) because Convert to version 1.0.0

• five -> (test versions composer)

and Done! ^_^

you can see two version of composer installed in one windows system.

reference : How to install two composer in one windows system?

Sanction

While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes. - From Review – Marmoreal

2.5.1 is not the composer LTS version, the LTS version is on the 2.2 channel. And honestly I see no need to duplicate your own answer as the comlete Q&A is here: https://mcmap.net/q/1468585/-how-to-install-two-composer-in-one-windows-system and also prominently linked as related question already. Please remove it and improve the original answer. – Ewan