scripts/zsh-completion/_fx_worktree

# Copyright 2026 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Helper function to generate filtered lists of worktree names for completion.
# Supported filters:
#   - physical_free:   Only physical worktree slots that are not currently leased.
#   - physical_leased: Only physical worktree slots that are currently leased.
#   - physical_all:    All physical worktree slots.
#   - leased:          Only leased task names (symlinks).
#   - all:             Both physical worktree slots and leased task names (symlinks).

__fx_worktree_names_filtered() {
  local filter=$1
  local fdir=$fuchsia_dir
  if [[ -z "$fdir" ]]; then
    # Fallback to resolve the Fuchsia source tree root if not defined.
    local parent="$(pwd)"
    while [[ ! -f "${parent}/.fx-root" ]]; do
      if [[ "$parent" == "/" ]]; then
        break
      fi
      parent="$(dirname "${parent}")"
    done
    if [[ -f "${parent}/.fx-root" ]]; then
      fdir="$parent"
    fi
  fi

  if [[ -n "$fdir" ]]; then
    local -a matches
    matches=( $( "${fdir}/scripts/fuchsia-vendored-python" "${fdir}/tools/devshell/worktree/main.py" _complete "$filter" 2>/dev/null ) )
    if [[ ${#matches} -gt 0 ]]; then
      compadd -- "${matches[@]}"
    fi
  fi

}

# Define the top-level subcommands for 'fx worktree'.
local -a subcommands
subcommands=(
  'pool:Administrative commands for provisioning and maintaining physical checkouts'
  'locate:Print the absolute path to a worktree directory'
  'list:List all leased worktrees'
  'add:Add a leased worktree checkout for development'
  'remove:Remove a leased worktree and return it to the pool'
)

# Parse command-line arguments. State transitions allow nested completions.
_arguments \
  '1:subcommand:->subcommand' \
  '*::args:->args'

case $state in
  subcommand)
    _describe -t subcommands 'subcommand' subcommands
    ;;
  args)
    # Complete arguments for the subcommand. Since Zsh shifts the $words array,
    # $words[1] now refers to the subcommand.
    local subcmd=$words[1]
    case $subcmd in
      pool)
        local -a pool_subcommands
        pool_subcommands=(
          'list:List all physical worktrees in the pool'
          'add:Add a new physical worktree checkout to the pool'
          'remove:Remove a physical worktree from the pool'
        )
        _arguments \
          '1:pool_subcommand:->pool_subcommand' \
          '*::pool_args:->pool_args'

        case $state in
          pool_subcommand)
            _describe -t pool_subcommands 'pool subcommand' pool_subcommands
            ;;
          pool_args)
            local pool_subcmd=$words[1]
            case $pool_subcmd in
              add)
                _arguments \
                  '--set[Run fx set with these arguments]:args: ' \
                  '1:name: '
                ;;
              remove)
                _arguments \
                  '--force[Force removal]' \
                  '1:worktree: __fx_worktree_names_filtered physical_all'
                ;;
            esac
            ;;
        esac
        ;;
      locate)
        # locate accepts either leased task names (symlinks) or physical slot names.
        _arguments '1:worktree: __fx_worktree_names_filtered all'
        ;;
      add)
        _arguments \
          '--pool-name[Specific pool slot to allocate]:pool_name: __fx_worktree_names_filtered physical_free' \
          '--json[Output JSON]' \
          '1:name: '
        ;;
      remove)
        # remove accepts only leased task names (symlinks).
        _arguments '1:worktree: __fx_worktree_names_filtered leased'
        ;;
    esac
    ;;
esac