hyf_wr7pper.sh

#!/bin/sh
set -ue

# Copyright 2021 Alin Mr. <almr.oss@outlook.com>. Licensed under the MIT license (https://opensource.org/licenses/MIT).

eval "${HYF_WR7PPER_ENV:-}"
set -- "${XDG_CONFIG_HOME:-$HOME/.config}"/hyperfine/hyf_wr7pper.env "$@"
! [ -r "$1" ] || . "$1"
shift
eval set -- "${HYF_WR7PPER_OPTS:-}" '"$@"'

# temp file infrastructure; uses globals $tmp*
__mkt() {  # args: name
  # TODO: trap
  [ "$tmpd" ] || tmpd=$(mktemp -d "${TMPDIR:-/tmp}"/hyf_wr7pper.XXXXXX)
  tmpf="$tmpd"/"$1"
  tmpcnt=$(( tmpcnt + 1 ))
}
__mkt_shebang() {  # args: name shebang
  __mkt "$1"; shift
  printf '#!%s\n' "$1" >"$tmpf"
  chmod a+x "$tmpf"
}
__mkt_shexecwrap() {  # args: name cmd
  __mkt_shebang "$1" '/bin/sh'; shift
  printf 'exec %s "$@"\n' "$1" >>"$tmpf"
}

__script_concat() {  # args: script.. # will be separated by ';'
  if [ $# -gt 2 ]; then
    __script_concat "$1" "$(shift; __script_concat "$@")"
    return 0
  fi

  case "$1" in (''|*[![:space:]]*) ;; (*) set -- '' "$2" ;; esac
  case "$2" in (''|*[![:space:]]*) ;; (*) set -- "$1" '' ;; esac
  if   [ -z "$1" ]; then printf '%s' "$2"
  elif [ -z "$2" ]; then printf '%s' "$1"
  else
    # safe way: $1$nl$2, but screws up benchmark output; so go with this hack
    # fooled by e.g. `( echo $'ls \\ \n' )`, `( echo $'ls \\ \n \\ \n' )` etc
    printf '%s' "$1" |
      # adds final '; ' unless exists or line empty
      sed -e '${ s/[[:space:]]*$//; /[^;]$/s/$/; / }'
    printf '%s' "$2"
  fi
}

__main() {
  local i n arg val var
  local tmpd= tmpcnt=0 tmpf  # dynamic vars used by callees
  local pre= post= scripts=false nl='
'
  set -- "$@" ---wr7pper---  # marker -- separate original and processed args

  while :; do  # consumes args upto marker, appends them
    if [ $# = 0 ]; then unset Error && : "${Error?internal}"; fi
    val= arg=$1; shift
    if [ "$arg" = ---wr7pper--- ]; then break; fi
    if "$scripts"; then
      set -- "$@" "$(__script_concat "$pre$arg" "$post")"
      continue
    fi

    case "$arg" in (--*=*) val=${arg#*=} ;; (-?*) val=${arg#-?} ;; esac
    case "$arg" in
      (--) scripts=true; set -- "$@" -- ;;
      (---v)       set -x ;;
      (---pre=*)   pre=${arg#*=}$pre ;;
      (---post=*)  post=$( __script_concat "$post" "${arg#*=}" ) ;;
      (---cd=*)    set -- ---pre='cd -- '"$val"' || exit 1; ' "$@" ;;
      (---n=*)     var=${val%%=*}; val=${val#*=}; set -- \
        ---pre="$var=$val; while [ \"\$$var\" != 0 ]; do $var=\$(( $var - 1 )); " \
        ---post=done "$@"
        ;;
      (-S?*)
        case "$val" in (*' '*)
          __mkt_shexecwrap "$tmpcnt.wrap.sh" "$val" && val=$tmpf ;;
        esac; set -- "$@" -S "$val"
        ;;
      (-r?*)
        case "$val" in (1) val=2; set -- "$@" --show-output ;; esac
        set -- "$@" -r "$val"
        ;;  # TODO: r=0 -> run scripts directly and exit
      (*) set -- "$@" "$arg" ;;
    esac
  done

  set +e; hyperfine "$@"; local rc=$?
  case "$tmpd" in (*'hyf_wr7pper'*) rm -rf "$tmpd" ;; esac
  return "$rc"
}

__main "$@"