.zshrc

# ===========================================
# ZSH Hacks - Dreams of Code
# ===========================================
# Add these to your .zshrc file
# ===========================================

# -------------------------------------------
# 1. Edit Command Buffer
# -------------------------------------------
# Open the current command in your $EDITOR (e.g., neovim)
# Press Ctrl+X followed by Ctrl+E to trigger
autoload -Uz edit-command-line
zle -N edit-command-line
bindkey '^X^E' edit-command-line

# For Vi mode users:
# bindkey -M vicmd 'v' edit-command-line

# -------------------------------------------
# 2. Undo in ZSH
# -------------------------------------------
# Press Ctrl+_ (Ctrl+Underscore) to undo
# This is built-in, no configuration needed!
# Redo widget exists but has no default binding:
# bindkey '^Y' redo  # Example binding if you want it

# -------------------------------------------
# 3. Magic Space - Expand History
# -------------------------------------------
# Expands history expressions like !! or !$ when you press space
bindkey ' ' magic-space

# -------------------------------------------
# 4. chpwd Hook - Run Commands on Directory Change
# -------------------------------------------
# NOTE: Only one chpwd hook can be defined at once
# To merge them, use add-zsh-hook which is mentioned below

# Example: List directory contents on cd

chpwd() {
  ls
}

# Example: Auto-activate Python virtual environments
chpwd() {
  if [[ -d .venv ]]; then
    source .venv/bin/activate
  fi
}

# Example: Auto-load Nix development shells
chpwd() {
  if [[ -f flake.nix ]] && [[ -z "$IN_NIX_SHELL" ]]; then
    nix develop
  fi
}

# Example: Auto-use correct Node version with nvm
chpwd() {
  if [[ -f .nvmrc ]]; then
    nvm use
  fi
}

# -------------------------------------------
# 4.1. Bonus: Merging Hooks
# -------------------------------------------

# To merge hooks, use add-zsh-hook
autoload -Uz add-zsh-hook


# Then Define separate functions
function auto_venv() {
  # If already in a virtualenv, do nothing
  if [[ -n "$VIRTUAL_ENV" && "$PWD" != *"${VIRTUAL_ENV:h}"* ]]; then
    deactivate
    return  
  fi

  [[ -n "$VIRTUAL_ENV" ]] && return

  local dir="$PWD"
  while [[ "$dir" != "/" ]]; do
    if [[ -f "$dir/.venv/bin/activate" ]]; then
      source "$dir/.venv/bin/activate"
      return
    fi
    dir="${dir:h}"
  done
}

function auto_nix() {
  # If we're already in a nix develop shell, do nothing
  [[ -n "$IN_NIX_SHELL" ]] && return

  # Walk up to find a flake
  local dir="$PWD"
  while [[ "$dir" != "/" ]]; do
    if [[ -f "$dir/flake.nix" ]]; then
      # If this project already has .envrc, just allow it (you can remove this if you prefer)
      if [[ ! -f "$dir/.envrc" ]]; then
        # Create .envrc that loads the dev env (fast, no interactive shell)
        cat > "$dir/.envrc" <<'EOF'
# autogenerated: load flake dev environment
eval "$(nix print-dev-env)"
EOF
        command direnv allow "$dir" >/dev/null 2>&1
      fi

      command direnv reload >/dev/null 2>&1
      return
    fi
    dir="${dir:h}"
  done
}

function auto_nvm() {
  [[ -f .nvmrc ]] && nvm use
}

# Register them all
add-zsh-hook chpwd auto_venv
add-zsh-hook chpwd auto_nix
add-zsh-hook chpwd auto_nvm

# -------------------------------------------
# 5. Suffix Aliases - Open Files by Extension
# -------------------------------------------
# Just type the filename to open it with the associated program
alias -s json=jless
alias -s md=bat
alias -s go='$EDITOR'
alias -s rs='$EDITOR'
alias -s txt=bat
alias -s log=bat
alias -s py='$EDITOR'
alias -s js='$EDITOR'
alias -s ts='$EDITOR'
alias -s html=open  # macOS: open in default browser

# -------------------------------------------
# 6. Global Aliases - Use Anywhere in Commands
# -------------------------------------------
# Redirect stderr to /dev/null
alias -g NE='2>/dev/null'

# Redirect stdout to /dev/null
alias -g NO='>/dev/null'

# Redirect both stdout and stderr to /dev/null
alias -g NUL='>/dev/null 2>&1'

# Pipe to jq
alias -g J='| jq'

# Copy output to clipboard (macOS)
alias -g C='| pbcopy'

# Copy output to clipboard (Linux with xclip)
# alias -g C='| xclip -selection clipboard'

# -------------------------------------------
# 7. zmv - Advanced Batch Rename/Move
# -------------------------------------------
# Enable zmv
autoload -Uz zmv

# Usage examples:
# zmv '(*).log' '$1.txt'           # Rename .log to .txt
# zmv -w '*.log' '*.txt'           # Same thing, simpler syntax
# zmv -n '(*).log' '$1.txt'        # Dry run (preview changes)
# zmv -i '(*).log' '$1.txt'        # Interactive mode (confirm each)

# Helpful aliases for zmv
alias zcp='zmv -C'  # Copy with patterns
alias zln='zmv -L'  # Link with patterns

# -------------------------------------------
# 8. Named Directories - Bookmark Folders
# -------------------------------------------
# Access with ~name syntax, e.g., cd ~yt or ls ~yt
hash -d yt=~/projects/youtube
hash -d dot=~/.dotfiles
hash -d dl=~/Downloads
# Add your own commonly used directories here

# -------------------------------------------
# 9. Custom Widgets
# -------------------------------------------
# Clear screen but keep current command buffer
function clear-screen-and-scrollback() {
  echoti civis >"$TTY"
  printf '%b' '\e[H\e[2J\e[3J' >"$TTY"
  echoti cnorm >"$TTY"
  zle redisplay
}
zle -N clear-screen-and-scrollback
bindkey '^Xl' clear-screen-and-scrollback

# Copy current command buffer to clipboard (macOS)
function copy-buffer-to-clipboard() {
  echo -n "$BUFFER" | pbcopy
  zle -M "Copied to clipboard"
}
zle -N copy-buffer-to-clipboard
bindkey '^Xc' copy-buffer-to-clipboard

# For Linux with wl-copy:
# function copy-buffer-to-clipboard() {
#   echo -n "$BUFFER" | wl-copy
#   zle -M "Copied to clipboard"
# }

# -------------------------------------------
# 10. Hotkey Insertions - Text Snippets
# -------------------------------------------
# Insert git commit template (Ctrl+X, G, C)
# \C-b moves cursor back one position
bindkey -s '^Xgc' 'git commit -m ""\C-b'

# More examples:
bindkey -s '^Xgp' 'git push origin '
bindkey -s '^Xgs' 'git status\n'
bindkey -s '^Xgl' 'git log --oneline -n 10\n'

idk if it was the same for you but $VIRTUAL_ENV was an absolute path for me so the auto_venv function didn't deactivate when I cd'd out of a directory with a venv

@seanPruss I also had this issue. I changed the check to:

if [[ -n "$VIRTUAL_ENV" && "$PWD" != *"${VIRTUAL_ENV:h}"* ]]; then
    deactivate
    return
fi

The second part checks whether the parent folder of $VIRTUAL_ENV (this should be your project folder) appears in the $PWD string. If not, this suggests you are outside the project folder, and thus deactivates the venv.

Neither clear-screen-and-scrollback nor copy-buffer-to-clipboard work for me 😔

Those commands were the ones I most wanted... I'm on a Mac using Ghostty+tmux, not sure how to test why it's not working for me.

@mzaveiro Try them again! I had them bound to their Ctrl counterparts (ctrl+x ctrl+c) but they might be conflicting.

Now they're Ctrl+X c and Ctrl+X l

@seanPruss I also had this issue. I changed the check to:

if [[ -n "$VIRTUAL_ENV" && "$PWD" != *"${VIRTUAL_ENV:h}"* ]]; then
    deactivate
    return
fi

The second part checks whether the parent folder of $VIRTUAL_ENV (this should be your project folder) appears in the $PWD string. If not, this suggests you are outside the project folder, and thus deactivates the venv.

Thanks for this snippet! I've gone ahead and modified my code :)

@mzaveiro Try them again! I had them bound to their Ctrl counterparts (ctrl+x ctrl+c) but they might be conflicting.

Now they're Ctrl+X c and Ctrl+X l

Nice! Both work now 🎉 Thanks for the quick reply!