cg-tag-show

   1 #!/usr/bin/env bash
   2 #
   3 # Show information about given tag(s)
   4 # Copyright (c) Petr Baudis 2006
   5 #
   6 # This command shows detailed information about specified tag(s).
   7
   8 # Testsuite: TODO
   9
  10 USAGE="cg-tag-show TAGNAME..."
  11 _git_wc_unneeded=1
  12
  13 . "${COGITO_LIB}"cg-Xlib || exit 1
  14
  15
  16 verify_tag()
  17 {
  18         local tag="$1" sha1="$2"
  19         local tagfile="$(mktemp -t gittag.XXXXXX)"
  20
  21         git-cat-file tag "$1" >"$tagfile" || return 1
  22         cat "$tagfile" | sed '/^-----BEGIN PGP SIGNATURE-----/Q' |
  23                 gpg --verify "$tagfile" - || return 1
  24         rm -f "$tagfile"
  25         return 0
  26 }
  27
  28 header_end()
  29 {
  30         local tag="$1" sha1="$2" verify="$3"
  31
  32         if [ "$verify" ]; then
  33                 if verify_tag "$tag" "$sha1"; then
  34                         echo "Signature: Ok"
  35                 else
  36                         echo "Signature: NOT VERIFIED"
  37                 fi
  38         else
  39                 echo "Signature: None"
  40         fi
  41 }
  42
  43 cat_tag()
  44 {
  45         local tag="$1" sha1="$2" verify="$3" object= state=1 date=
  46         while IFS=$'\n' read -r line; do
  47                 if [ ! "$line" -a "$state" = 1 ]; then
  48                         header_end "$tag" "$sha1" "$verify"
  49                         echo
  50                         state=2
  51                         continue
  52                 fi
  53
  54                 if [ "$state" = 1 ]; then
  55                         data="${line#* }"
  56                         case "${line%% *}" in
  57                         object) object="$data";;
  58                         type)
  59                                 echo "Object: $object ($data)";;
  60                         tag)
  61                                 if [ "$data" != "$tag" ]; then
  62                                         echo "Real tag name: $data"
  63                                 fi;;
  64                         tagger)
  65                                 # We want wordsplitting in the $date here, to get
  66                                 # TZ as separate argument.
  67                                 date=(${data#*> })
  68                                 showdate ${date[*]}; date="$_showdate"
  69                                 echo "Tagger: ${data%%> *}> $date";;
  70                         *)
  71                                 echo " $line";; # print unknown headers as-they-are
  72                         esac
  73                 elif [ "$state" = 2 ]; then
  74                         if [ x"$line" = x"-----BEGIN PGP SIGNATURE-----" ]; then
  75                                 # FIXME: Extra newline was printed just before
  76                                 break
  77                         fi
  78                         echo "    $line"
  79                 fi
  80         done
  81         if [ "$state" = 1 ]; then
  82                 header_end "$tag" "$sha1" "$verify"
  83         fi
  84 }
  85
  86 show_tag()
  87 {
  88         local tag="$1"
  89         local sha1
  90         if ! sha1="$(get_ref "refs/tags/$tag")"; then
  91                 echo "No such tag: $tag" >&2
  92                 echo >&2
  93                 return 1
  94         fi
  95         local type="$(git-cat-file -t "$sha1" 2>/dev/null)"
  96         if [ ! "$type" ]; then
  97                 echo "Broken tag: $tag" >&2
  98                 echo >&2
  99                 return 1
 100         fi
 101
 102         echo -n "Tag: $tag"
 103         if [ "$type" != "tag" ]; then
 104                 echo " (direct)"
 105                 echo "Object: $sha1 ($type)"
 106                 return 0
 107         fi
 108         echo
 109
 110         local verify=
 111         if git-cat-file tag "$sha1" | grep -q '^-----BEGIN PGP SIGNATURE-----'; then
 112                 verify=1
 113         fi
 114         git-cat-file tag "$sha1" | cat_tag "$tag" "$sha1" "$verify"
 115         if [ ${PIPESTATUS[0]} -ne 0 -o ${PIPESTATUS[1]} -ne 0 ]; then
 116                 return 1
 117         fi
 118         return 0
 119 }
 120
 121
 122 [ "${ARGS[0]}" ] || usage
 123
 124 first=1
 125 ret=0
 126 for tag in "${ARGS[@]}"; do
 127         if [ "$first" ]; then
 128                 first=
 129         else
 130                 echo
 131         fi
 132         if ! show_tag "$tag"; then
 133                 ret=1
 134                 first=1
 135         fi
 136 done
 137 exit $ret