binary_runner.bash.template

#!/usr/bin/env bash

set -euo pipefail

TOOL_NAME='{TOOL_NAME}'
TOOL_SHORT_PATH='{TOOL_SHORT_PATH}'

function resolve_runfile() {
  local path=$1
  local runfiles_path=${path#../}
  local candidate
  local manifest
  local line

  if [[ -e "$path" ]]; then
    realpath "$path"
    return 0
  fi

  if [[ -n "${RUNFILES_DIR:-}" ]]; then
    candidate="${RUNFILES_DIR}/${runfiles_path}"
    if [[ -e "$candidate" ]]; then
      realpath "$candidate"
      return 0
    fi
  fi

  for manifest in \
    "${RUNFILES_MANIFEST_FILE:-}" \
    "$0.runfiles_manifest" \
    "$0.exe.runfiles_manifest" \
    "$0.runfiles/MANIFEST"; do
    [[ -n "$manifest" && -f "$manifest" ]] || continue
    while IFS= read -r line; do
      if [[ "$line" == "${runfiles_path} "* ]]; then
        printf '%s\n' "${line#* }"
        return 0
      elif [[ "$line" == "$runfiles_path" ]]; then
        printf '%s\n' "$runfiles_path"
        return 0
      fi
    done < "$manifest"
  done

  return 1
}

if ! tool_path=$(resolve_runfile "$TOOL_SHORT_PATH"); then
  echo "Unable to locate $TOOL_NAME runfile: $TOOL_SHORT_PATH" >&2
  exit 1
fi

working_directory=${BUILD_WORKING_DIRECTORY:-${BUILD_WORKSPACE_DIRECTORY:-}}
if [[ -n "$working_directory" ]]; then
  if ! cd "$working_directory"; then
    echo "Unable to change working directory: $working_directory" >&2
    exit 1
  fi
fi

exec "$tool_path" "$@"