git-request-pull.sh

   1 #!/bin/sh
   2 # Copyright 2005, Ryan Anderson <ryan@michonline.com>
   3 #
   4 # This file is licensed under the GPL v2, or a later version
   5 # at the discretion of Linus Torvalds.
   6
   7 USAGE='<start> <url> [<end>]'
   8 LONG_USAGE='Summarizes the changes between two commits to the standard output,
   9 and includes the given URL in the generated summary.'
  10 SUBDIRECTORY_OK='Yes'
  11 OPTIONS_KEEPDASHDASH=
  12 OPTIONS_SPEC='git request-pull [options] start url [end]
  13 --
  14 p    show patch text as well
  15 '
  16
  17 . git-sh-setup
  18
  19 GIT_PAGER=
  20 export GIT_PAGER
  21
  22 patch=
  23 while   case "$#" in 0) break ;; esac
  24 do
  25         case "$1" in
  26         -p)
  27                 patch=-p ;;
  28         --)
  29                 shift; break ;;
  30         -*)
  31                 usage ;;
  32         *)
  33                 break ;;
  34         esac
  35         shift
  36 done
  37
  38 base=$1 url=$2 head=${3-HEAD} status=0 branch_name=
  39
  40 headref=$(git symbolic-ref -q "$head")
  41 if git show-ref -q --verify "$headref"
  42 then
  43         branch_name=${headref#refs/heads/}
  44         if test "z$branch_name" = "z$headref" ||
  45                 ! git config "branch.$branch_name.description" >/dev/null
  46         then
  47                 branch_name=
  48         fi
  49 fi
  50
  51 tag_name=$(git describe --exact "$head^0" 2>/dev/null)
  52
  53 test -n "$base" && test -n "$url" || usage
  54 baserev=$(git rev-parse --verify "$base"^0) &&
  55 headrev=$(git rev-parse --verify "$head"^0) || exit
  56
  57 merge_base=$(git merge-base $baserev $headrev) ||
  58 die "fatal: No commits in common between $base and $head"
  59
  60 # $head is the token given from the command line, and $tag_name, if
  61 # exists, is the tag we are going to show the commit information for.
  62 # If that tag exists at the remote and it points at the commit, use it.
  63 # Otherwise, if a branch with the same name as $head exists at the remote
  64 # and their values match, use that instead.
  65 #
  66 # Otherwise find a random ref that matches $headrev.
  67 find_matching_ref='
  68         sub abbr {
  69                 my $ref = shift;
  70                 if ($ref =~ s|^refs/heads/|| || $ref =~ s|^refs/tags/|tags/|) {
  71                         return $ref;
  72                 } else {
  73                         return $ref;
  74                 }
  75         }
  76
  77         my ($tagged, $branch, $found);
  78         while (<STDIN>) {
  79                 my ($sha1, $ref, $deref) = /^(\S+)\s+(\S+?)(\^\{\})?$/;
  80                 next unless ($sha1 eq $ARGV[1]);
  81                 $found = abbr($ref);
  82                 if ($deref && $ref eq "tags/$ARGV[2]") {
  83                         $tagged = $found;
  84                         last;
  85                 }
  86                 if ($ref =~ m|/\Q$ARGV[0]\E$|) {
  87                         $exact = $found;
  88                 }
  89         }
  90         if ($tagged) {
  91                 print "$tagged\n";
  92         } elsif ($exact) {
  93                 print "$exact\n";
  94         } elsif ($found) {
  95                 print "$found\n";
  96         }
  97 '
  98
  99 ref=$(git ls-remote "$url" | perl -e "$find_matching_ref" "$head" "$headrev" "$tag_name")
 100
 101 url=$(git ls-remote --get-url "$url")
 102
 103 git show -s --format='The following changes since commit %H:
 104
 105   %s (%ci)
 106
 107 are available in the git repository at:
 108 ' $merge_base &&
 109 echo "  $url${ref+ $ref}" &&
 110 git show -s --format='
 111 for you to fetch changes up to %H:
 112
 113   %s (%ci)
 114
 115 ----------------------------------------------------------------' $headrev &&
 116
 117 if test -n "$branch_name"
 118 then
 119         echo "(from the branch description for $branch_name local branch)"
 120         echo
 121         git config "branch.$branch_name.description"
 122 fi &&
 123
 124 if test -n "$tag_name"
 125 then
 126         if test -z "$ref" || test "$ref" != "tags/$tag_name"
 127         then
 128                 echo >&2 "warn: You locally have $tag_name but it does not (yet)"
 129                 echo >&2 "warn: appear to be at $url"
 130                 echo >&2 "warn: Do you want to push it there, perhaps?"
 131         fi
 132         git cat-file tag "$tag_name" |
 133         sed -n -e '1,/^$/d' -e '/^-----BEGIN PGP /q' -e p
 134         echo
 135 fi &&
 136
 137 if test -n "$branch_name" || test -n "$tag_name"
 138 then
 139         echo "----------------------------------------------------------------"
 140 fi &&
 141
 142 git shortlog ^$baserev $headrev &&
 143 git diff -M --stat --summary $patch $merge_base..$headrev || status=1
 144
 145 if test -z "$ref"
 146 then
 147         echo "warn: No branch of $url is at:" >&2
 148         git show -s --format='warn:   %h: %s' $headrev >&2
 149         echo "warn: Are you sure you pushed '$head' there?" >&2
 150         status=1
 151 fi
 152 exit $status