# The bootstrap token's first use in `swarm-bao-granter-role`, as shell text
# that leaves `mounted` set to the store's auth listing, or ends the script.
# Same split as ./granter-login.nix, applied to `bao auth list`:
#
# - A refusal ("permission denied", HTTP 403: openbao answers an expired,
#   revoked or underprivileged token alike) is the token's. If the granter's
#   own login works the role is already in place and the dead token is
#   deleted; otherwise the unit prints the one-time steps and exits 4, which
#   `RestartPreventExitStatus` keeps from retrying.
# - Any other failure from a store that answers `status` is not the token's:
#   a node that is not yet active answers with a 500 for the first moments
#   after an unseal. The message says so and exits 1, which `Restart=` retries.
# - A store that does not answer `status` is sealed or unreachable; exit 1.
#
# In every case bao's own error follows.
#
# Pure function — NOT a NixOS module. `baoStoreUp` is as for
# ./granter-login.nix. Needs `bao`, `coreutils` and `gnugrep` on the caller's
# `path`, and `$err` to be a scratch file.
{
  lib,
  bootstrapTokenFile,
  granterClientCertFile,
  granterClientKeyFile,
  baoStoreUp,
  setupSteps,
}:
''
  if ! mounted="$(bao auth list -format=json 2>"$err")"; then
    if grep -qF 'permission denied' "$err"; then
      # A dead token beside a working granter is the steady state of
      # a host that finished bootstrap and kept the file. The
      # granter's own login is the proof. A fresh token still takes
      # the full path below, since the granter cannot read back its
      # own policy to compare it. The refused token is dead,
      # so it is deleted here and the unit does not start again.
      if BAO_CLIENT_CERT=${lib.escapeShellArg granterClientCertFile} \
        BAO_CLIENT_KEY=${lib.escapeShellArg granterClientKeyFile} \
        bao login -method=cert -token-only >/dev/null 2>&1; then
        echo "granter role already in place; bootstrap token not needed"
        rm -f ${lib.escapeShellArg bootstrapTokenFile}
        exit 0
      fi
      echo ${lib.escapeShellArg "the store refused the bootstrap token in ${bootstrapTokenFile}: it has expired, been revoked, or does not carry the bao-bootstrap policy."} >&2
      echo "one-time step, as root on this host (docs/getting-started/setup.md):" >&2
      ${lib.concatMapStringsSep "\n" (l: "echo ${lib.escapeShellArg "  ${l}"} >&2") setupSteps}
      cat "$err" >&2
      exit 4
    elif ${baoStoreUp}; then
      echo "the store is unsealed but listing its auth mounts failed without a refused token, as a node that is not active yet answers; retrying." >&2
    else
      echo "the store is sealed or unreachable; retrying." >&2
    fi
    cat "$err" >&2
    exit 1
  fi
''