Add shell setup installer

Author: ioma8

README.md

@@ -39,31 +39,49 @@ sudo pacman -S fd ripgrep bat
 
 ```bash
 brew install ioma8/tap/fishez
+fishez --install-shell
+fz ~/projects
 ```
 
-Then enable the `fz` shell wrapper below.
+Homebrew will also remind you to run `fishez --install-shell` after install.
 
 ### One-line binary installer
 
 ```bash
 curl -sfL https://raw.githubusercontent.com/ioma8/fishez/main/install.sh | sh
 ```
 
-The installer downloads the latest GitHub release and adds the `fz` wrapper to `.zshrc` / `.bashrc` when it can.
+The installer downloads the latest GitHub release and runs `fishez --install-shell` when it can.
 
 ### Build with Cargo
 
 Requires Rust and CMake.
 
 ```bash
 cargo install fishez
+fishez --install-shell
+fz
 ```
 
 ### Enable `fz`
 
 `fz` is a tiny shell function around `fishez`. It opens the file manager and, when you quit, changes your shell into the directory you were browsing. Use `fishez` directly if you want to browse without changing the parent shell directory.
 
-Append the setup line to your shell rc file:
+Run this once after installing with Homebrew or Cargo:
+
+```bash
+fishez --install-shell
+```
+
+It detects zsh, bash, or fish and installs the `fz` wrapper if it is not already present. Then open a new terminal, or source the file it prints.
+
+To remove the wrapper later:
+
+```bash
+fishez --uninstall-shell
+```
+
+If you prefer to do it manually, append the setup line to your shell rc file:
 
 ```bash
 # zsh

install.sh

@@ -17,7 +17,7 @@ case "$OS" in
   *)
     echo "Unsupported OS: $OS"
     echo "Try: cargo install fishez"
-    echo 'Then add eval "$(fishez --init)" to your shell rc for fz.'
+    echo "Then run: fishez --install-shell"
     exit 1
     ;;
 esac
@@ -28,7 +28,7 @@ case "$ARCH" in
   *)
     echo "Unsupported architecture: $ARCH"
     echo "Try: cargo install fishez"
-    echo 'Then add eval "$(fishez --init)" to your shell rc for fz.'
+    echo "Then run: fishez --install-shell"
     exit 1
     ;;
 esac
@@ -56,22 +56,8 @@ else
   sudo mv /tmp/fishez /usr/local/bin/$BIN
 fi
 
-# Install the fz() shell wrapper (cd to last viewed dir on exit)
-case "${SHELL:-}" in
-  */zsh)  RC="$HOME/.zshrc" ;;
-  */bash) RC="$HOME/.bashrc" ;;
-  *)      RC="" ;;
-esac
-
-FZ_LINE='eval "$(fishez --init)"  # fz: fishez wrapper that cds to the last viewed dir'
-if [ -n "$RC" ]; then
-  if ! grep -q "fishez --init" "$RC" 2>/dev/null; then
-    printf '\n%s\n' "$FZ_LINE" >> "$RC"
-    echo "✓ Added fz shell function to $RC (open a new shell to use it)."
-  fi
-else
-  echo "To get the fz function (cd on exit), add this to your shell rc:"
-  echo "  $FZ_LINE"
-fi
+/usr/local/bin/$BIN --install-shell || {
+  echo "To enable fz later, run: fishez --install-shell"
+}
 
 echo "✓ fishez installed. Run 'fishez' to start, or 'fz' to cd on exit."