Update broken since v2: Could not detect the installation method #53340

Description

Updating OpenCode is broken for any v2 installation based on curl whose $HOME is reachable through a symlink. This is a corner case, but it affects a real class of setups where the home directory is exposed under two different path spellings — for example shared/network homes (/u → /home).

When OpenCode is installed with the official curl installer it lives at:

/u/vagrant/.opencode/bin/opencode (symlinked spelling)
/home/vagrant/.opencode/bin/opencode (same file, canonical spelling)

Updating then fails because the installation method is not recognized.

Plugins

No response

OpenCode version

Tested 2.0.18, 2.0.1

Steps to reproduce

Just create a simlink to the real home, and exploit the symlink as home of the user. Will be the default installation path for the curl installer.

vagrant@vagrant:~$ echo $HOME
/u/vagrant
vagrant@vagrant:~$ realpath $HOME
/home/vagrant
vagrant@vagrant:~$ file /u
/u: symbolic link to /home
vagrant@vagrant:~$ which opencode
/u/vagrant/.opencode/bin/opencode
vagrant@vagrant:~$ realpath $(which opencode)
/home/vagrant/.opencode/bin/opencode
vagrant@vagrant:~$ opencode update
┌  Upgrade
│
■  Could not detect the installation method. Pass --method to choose how to upgrade OpenCode.
│
└  Failed

Screenshot and/or share link

No response

Operating System

Fedora 41, Fedora 44, Ubuntu 24.04.2 LTS

Terminal

No response