#!/usr/bin/env bash
# nerf-git-restore-worktree -- Discard unstaged changes in the named files or pathspecs, reverting them to their staged content, or to HEAD if there are no staged changes for that path. DESTRUCTIVE on unstaged working-tree edits. Untracked files are not affected. Does not modify the index -- use git-restore-staged to unstage first.
# Generated from git manifest. Do not edit directly.
# nerf:threat:read=workspace
# nerf:threat:write=workspace

if [[ "${BASH_VERSINFO[0]:-0}" -lt 4 ]]; then
  echo "error: nerf-git-restore-worktree requires bash 4+. Found bash ${BASH_VERSION:-unknown}" >&2
  echo "  hint: on macOS, install a newer bash via 'brew install bash'" >&2
  exit 1
fi

set -euo pipefail

_NERF_DRY_RUN=""

usage() {
  cat >&2 <<'EOF'
Usage: nerf-git-restore-worktree [-C <directory>] <files...>

Options:
  -C <directory>
      Subdirectory of the workspace to run git in (must be under cwd)

Arguments:
  <files...> (required)
      Files, directories, or pathspecs to discard changes in

Maps to: git <directory> restore <files>

Discard unstaged changes in the named files or pathspecs, reverting them to their staged content, or to HEAD if there are no staged changes for that path. DESTRUCTIVE on unstaged working-tree edits. Untracked files are not affected. Does not modify the index -- use git-restore-staged to unstage first.
EOF
  exit 1
}

DIRECTORY=""
_DIRECTORY_SET=""

while [[ $# -gt 0 ]]; do
  case "$1" in
    -C) if [[ -n "${_DIRECTORY_SET}" ]]; then echo "error: -C can only be specified once" >&2; exit 1; fi; DIRECTORY="$2"; _DIRECTORY_SET=true; shift 2 ;;
    --nerf-dry-run) _NERF_DRY_RUN="true"; shift 1 ;;
    -h|--help) usage ;;
    --) shift; break ;;
    *) break ;;
  esac
done

FILES=("$@")

_nerf_check_path() {
  local _label=$1 _input=$2 _tests=$3
  local _cwd _canonical
  case "$_input" in
    *$'\n'*|*$'\r'*|*$'\t'*)
      echo "error: nerf-git-restore-worktree: ${_label}: contains illegal control character" >&2
      echo "  hint: paths must not contain newlines, carriage returns, or tabs" >&2
      return 1 ;;
  esac
  _cwd=$(realpath -- "$PWD") || {
    echo "error: nerf-git-restore-worktree: failed to canonicalize cwd '$PWD'" >&2
    echo "  hint: invoke from a valid directory" >&2
    return 1
  }
  _canonical=$(realpath -m -- "$_input") || {
    echo "error: nerf-git-restore-worktree: ${_label}: failed to canonicalize '${_input}'" >&2
    echo "  hint: pass a syntactically valid path" >&2
    return 1
  }
  if [[ ",$_tests," == *",under_cwd,"* ]]; then
    # Skip the prefix check when cwd is root: every absolute path qualifies, and the
    # naive prefix comparison would build "//" and reject otherwise-valid paths.
    if [[ "$_cwd" != "/" && "$_canonical" != "$_cwd" && "$_canonical" != "$_cwd"/* ]]; then
      echo "error: nerf-git-restore-worktree: ${_label}: 'under_cwd' failed: '${_input}'" >&2
      echo "  resolves to '${_canonical}', not under '${_cwd}'" >&2
      echo "  hint: pass a path inside the current workspace" >&2
      echo "  hint: symlinks are followed -- if the link's target is outside the workspace it is rejected" >&2
      return 1
    fi
  fi
  if [[ ",$_tests," == *",exists,"* ]] && [[ ! -e "$_input" ]]; then
    echo "error: nerf-git-restore-worktree: ${_label}: 'exists' failed: '${_input}' does not exist" >&2
    echo "  hint: create the path or pass an existing one" >&2
    return 1
  fi
  if [[ ",$_tests," == *",not_exists,"* ]] && [[ -e "$_input" ]]; then
    echo "error: nerf-git-restore-worktree: ${_label}: 'not_exists' failed: '${_input}' already exists" >&2
    echo "  hint: choose a different path or remove the existing one first" >&2
    return 1
  fi
  if [[ ",$_tests," == *",file,"* ]] && [[ ! -f "$_input" ]]; then
    echo "error: nerf-git-restore-worktree: ${_label}: 'file' failed: '${_input}' is not a regular file" >&2
    echo "  hint: pass a regular file path (not a directory, symlink-to-dir, device, or missing path)" >&2
    return 1
  fi
  if [[ ",$_tests," == *",dir,"* ]] && [[ ! -d "$_input" ]]; then
    echo "error: nerf-git-restore-worktree: ${_label}: 'dir' failed: '${_input}' is not a directory" >&2
    echo "  hint: pass a directory path (not a regular file or missing path)" >&2
    return 1
  fi
  if [[ ",$_tests," == *",symlink,"* ]] && [[ ! -L "$_input" ]]; then
    echo "error: nerf-git-restore-worktree: ${_label}: 'symlink' failed: '${_input}' is not a symlink" >&2
    echo "  hint: pass a symbolic link (the test does not follow the link)" >&2
    return 1
  fi
  if [[ ",$_tests," == *",not_symlink,"* ]] && [[ -L "$_input" ]]; then
    echo "error: nerf-git-restore-worktree: ${_label}: 'not_symlink' failed: '${_input}' is a symlink" >&2
    echo "  hint: pass a real path, not a symlink (the test does not follow the link)" >&2
    return 1
  fi
  if [[ ",$_tests," == *",readable,"* ]] && [[ ! -r "$_input" ]]; then
    echo "error: nerf-git-restore-worktree: ${_label}: 'readable' failed: '${_input}' is not readable" >&2
    echo "  hint: check filesystem permissions for the current user" >&2
    return 1
  fi
  if [[ ",$_tests," == *",writable,"* ]] && [[ ! -w "$_input" ]]; then
    echo "error: nerf-git-restore-worktree: ${_label}: 'writable' failed: '${_input}' is not writable" >&2
    echo "  hint: check filesystem permissions for the current user" >&2
    return 1
  fi
  if [[ ",$_tests," == *",executable,"* ]] && [[ ! -x "$_input" ]]; then
    echo "error: nerf-git-restore-worktree: ${_label}: 'executable' failed: '${_input}' is not executable" >&2
    echo "  hint: check filesystem permissions for the current user" >&2
    return 1
  fi
}

if [[ -n "${_DIRECTORY_SET}" ]]; then
  _nerf_check_path 'option -C' "${DIRECTORY}" 'under_cwd' || exit 1
fi

for _v in "${FILES[@]}"; do
  if [[ "$_v" == -* ]]; then
    echo "error: nerf-git-restore-worktree: <files> values cannot start with '-'" >&2
    echo "  hint: use -- before positional arguments if needed" >&2
    exit 1
  fi
done

if [[ ${#FILES[@]} -eq 0 ]]; then
  echo "error: nerf-git-restore-worktree: missing required argument <files>" >&2
  echo "  hint: provide at least one value" >&2
  usage
fi

if [[ "$_NERF_DRY_RUN" == "true" ]]; then
  _NERF_DRY_CMD=(git ${_DIRECTORY_SET:+"-C"} ${_DIRECTORY_SET:+"$DIRECTORY"} restore "${FILES[@]}")
  printf 'dry-run:'
  for _a in "${_NERF_DRY_CMD[@]}"; do printf " %q" "$_a"; done
  echo
  exit 0
fi

exec git ${_DIRECTORY_SET:+"-C"} ${_DIRECTORY_SET:+"$DIRECTORY"} restore "${FILES[@]}"
