git-verify-tag.shon commit git-merge: show usage if run without arguments (fc61e31)
   1#!/bin/sh
   2
   3USAGE='<tag>'
   4SUBDIRECTORY_OK='Yes'
   5. git-sh-setup
   6
   7verbose=
   8while case $# in 0) break;; esac
   9do
  10        case "$1" in
  11        -v|--v|--ve|--ver|--verb|--verbo|--verbos|--verbose)
  12                verbose=t ;;
  13        *)
  14                break ;;
  15        esac
  16        shift
  17done
  18
  19if [ "$#" != "1" ]
  20then
  21        usage
  22fi
  23
  24type="$(git-cat-file -t "$1" 2>/dev/null)" ||
  25        die "$1: no such object."
  26
  27test "$type" = tag ||
  28        die "$1: cannot verify a non-tag object of type $type."
  29
  30case "$verbose" in
  31t)
  32        git-cat-file -p "$1" |
  33        sed -n -e '/^-----BEGIN PGP SIGNATURE-----/q' -e p
  34        ;;
  35esac
  36
  37git-cat-file tag "$1" >"$GIT_DIR/.tmp-vtag" || exit 1
  38cat "$GIT_DIR/.tmp-vtag" |
  39sed '/-----BEGIN PGP/Q' |
  40gpg --verify "$GIT_DIR/.tmp-vtag" - || exit 1
  41rm -f "$GIT_DIR/.tmp-vtag"
  42