release-process/scripts/sign_exim_packages

   1 #!/bin/sh -eu
   2
   3 # gpg signs all *.tar.* files under the release directory.
   4 # Invoke from that dir, or let the script try to figure it out for you.
   5
   6 # Key used is from env var EXIM_KEY; if git config finds user.signingkey, then
   7 # that is the default.  You can set this per-repo with:
   8 #    git config --local user.signingkey SOME_IDENTIFIER
   9 #
  10 # If not set in git config then you _MUST_ set the env var.
  11
  12 # woe betide the poor sod who does not use a gpg agent, so has
  13 # to enter their password for every file...
  14
  15 prog="$(basename "$0")"
  16 warn() { printf >&2 "%s: %s\n" "$prog" "$*" ; }
  17
  18 : "${GPG_COMMAND:=gpg}"
  19 umask 022
  20
  21 # We've always expected an explicit key for signing, instead of just using the
  22 # gnupg config.  It make sense to honor the git config value.  It makes sense
  23 # to honor env.  But git doesn't allow specifying multiple subkeys, it only
  24 # passes one -u option.
  25 # UID specs explicitly allow whitespace in several formats.
  26 # We have one scalar value, we're sh, we're not going to try using an array.
  27 #
  28 # So if you want to sign with multiple subkeys, then set it up with multiple
  29 # local-user directives in ~/.gnupg/gpg.conf & set EXIM_KEY=default in environ.
  30
  31 if repo_signing_key="$(git config user.signingkey)"; then
  32         : "${EXIM_KEY:=$repo_signing_key}"
  33 else
  34         if [ ".${EXIM_KEY:-}" = "." ]; then
  35                 warn "no EXIM_KEY found, trusting local gpg config"
  36         fi
  37 fi
  38
  39 case "${EXIM_KEY:-default}" in
  40 default|DEFAULT)
  41         gpg_sign() { ${GPG_COMMAND} --detach-sig --armor "${1:?}" ; }
  42         ;;
  43 *)
  44         gpg_sign() { ${GPG_COMMAND} --local-user "${EXIM_KEY}" --detach-sig --armor "${1:?}" ; }
  45         ;;
  46 esac
  47
  48 cd_to() { echo "Working in: $1"; cd "$1"; }
  49
  50 okay=false
  51 if [ -d ../../release-process ] && [ "${PWD##*/}" = "pkgs" ]; then
  52         okay=true # we are in right dir
  53 elif [ -d release-process ]; then
  54         b="$(find . -maxdepth 1 -name 'exim-packaging-*' | sort | tail -n 1)"
  55         if [ ".$b" != "." ]; then
  56                 cd_to "$b/pkgs"
  57                 okay=true
  58         fi
  59 fi
  60 if ! $okay; then
  61         if [ -d "${1:?need a directory to look in}" ]; then
  62                 cd_to "$1"
  63                 shift
  64         else
  65                 printf "%s: %s\n" >&2 "$(basename "$0")" "where should I be looking"
  66                 exit 1
  67         fi
  68 fi
  69
  70 # Assumes no whitespace (strictly, $IFS) in filenames, which we're okay with
  71 set $(find . -name '*.asc' -prune -o -type f -print | cut -c 3- | sort)
  72
  73 for FILE
  74 do
  75         echo "Signing: $FILE"
  76         gpg_sign "$FILE"
  77 done