setup-zellij

Task

Install zellij terminal multiplexer and configure each shell profile (PowerShell and WSL bash / zsh) to launch it automatically on startup — replacing any existing herdr autostart block installed by setup-herdr.

Steps

1. Check Zellij installation (per environment)

PowerShell: Run Get-Command zellij -ErrorAction SilentlyContinue (or zellij --version).

WSL: Run wsl -- which zellij (or wsl -- zellij --version).

If found in an environment, mark that environment "already installed" and skip to step 3 for it. If not found, continue to step 2 for that environment.

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2. Install Zellij (only after user confirmation)

These are system-level installers — always show the exact command and get the user's go-ahead before running it via Bash/PowerShell (same convention setup-herdr uses for herdr's own install script).

Windows:

winget install --id Zellij.Zellij -e

WSL/Linux:

sudo apt update && sudo apt install -y zellij

If the distribution doesn't ship zellij, install it from Cargo instead: cargo install --locked zellij (or see https://zellij.dev).

If the user declines, mark that environment "skipped (declined)" and continue with the other environment.

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3. Configure shell profiles: remove herdr autostart, add Zellij autostart

Process the following four profiles independently: PowerShell 7 ($PROFILE), Windows PowerShell, WSL bash, and WSL zsh (only if zsh is installed).

3-A. PowerShell 7 profile

1. Get the profile path from $PROFILE.
2. If the file does not exist, create it along with its parent directory.
3. Remove any existing herdr autostart block. Look for the # Auto-start herdr comment; if present, remove it together with the block that follows through the matching closing }:

   # Auto-start herdr
   if (-not $env:HERDR_ENV) {
       herdr
   }
   

   If not found, note "(nothing to remove)" and continue.
4. Read the file and check whether it contains ZELLIJ or Auto-start Zellij. If found, mark as "already configured" and skip to 3-B.
5. If not found, append the following at the end of the file: