run_once_configure-shell.sh.tmpl

{{ if eq .chezmoi.os "linux" -}}
#!/bin/bash

set -euo pipefail

# Check if zsh is installed
if ! command -v zsh >/dev/null 2>&1; then
    echo "zsh not installed. Skipping shell configuration."
    exit 0
fi

# Get current shell using getent (more reliable than $SHELL)
CURRENT_SHELL=$(getent passwd "$USER" | cut -d: -f7)
TARGET_SHELL=$(command -v zsh)

if [ "$CURRENT_SHELL" != "$TARGET_SHELL" ]; then
    echo "Current shell is $CURRENT_SHELL. Changing to $TARGET_SHELL..."
    echo "You may be prompted for your password."
    chsh -s "$TARGET_SHELL"
else
    echo "Default shell is already $TARGET_SHELL."
fi
{{ else if eq .chezmoi.os "darwin" -}}
#!/bin/bash

set -euo pipefail

TARGET_SHELL=$(command -v zsh)
# Use dscl for macOS to get the user shell
CURRENT_SHELL=$(dscl . -read /Users/"$USER" UserShell | awk '{print $2}')

if [ "$CURRENT_SHELL" != "$TARGET_SHELL" ]; then
    echo "Current shell is $CURRENT_SHELL. Changing to $TARGET_SHELL..."
    
    # Ensure shell is in /etc/shells
    if ! grep -q "$TARGET_SHELL" /etc/shells; then
        echo "Adding $TARGET_SHELL to /etc/shells (sudo required)..."
        echo "$TARGET_SHELL" | sudo tee -a /etc/shells
    fi

    echo "You may be prompted for your password."
    chsh -s "$TARGET_SHELL"
else
    echo "Default shell is already $TARGET_SHELL."
fi
{{ end -}}