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 "$url" || usage
  54
  55 baserev=$(git rev-parse --verify --quiet "$base"^0)
  56 if test -z "$baserev"
  57 then
  58     die "fatal: Not a valid revision: $base"
  59 fi
  60
  61 headrev=$(git rev-parse --verify --quiet "$head"^0)
  62 if test -z "$headrev"
  63 then
  64     die "fatal: Not a valid revision: $head"
  65 fi
  66
  67 merge_base=$(git merge-base $baserev $headrev) ||
  68 die "fatal: No commits in common between $base and $head"
  69
  70 # $head is the token given from the command line, and $tag_name, if
  71 # exists, is the tag we are going to show the commit information for.
  72 # If that tag exists at the remote and it points at the commit, use it.
  73 # Otherwise, if a branch with the same name as $head exists at the remote
  74 # and their values match, use that instead.
  75 #
  76 # Otherwise find a random ref that matches $headrev.
  77 find_matching_ref='
  78         sub abbr {
  79                 my $ref = shift;
  80                 if ($ref =~ s|^refs/heads/|| || $ref =~ s|^refs/tags/|tags/|) {
  81                         return $ref;
  82                 } else {
  83                         return $ref;
  84                 }
  85         }
  86
  87         my ($tagged, $branch, $found);
  88         while (<STDIN>) {
  89                 my ($sha1, $ref, $deref) = /^(\S+)\s+(\S+?)(\^\{\})?$/;
  90                 next unless ($sha1 eq $ARGV[1]);
  91                 $found = abbr($ref);
  92                 if ($deref && $ref eq "tags/$ARGV[2]") {
  93                         $tagged = $found;
  94                         last;
  95                 }
  96                 if ($ref =~ m|/\Q$ARGV[0]\E$|) {
  97                         $exact = $found;
  98                 }
  99         }
 100         if ($tagged) {
 101                 print "$tagged\n";
 102         } elsif ($exact) {
 103                 print "$exact\n";
 104         } elsif ($found) {
 105                 print "$found\n";
 106         }
 107 '
 108
 109 ref=$(git ls-remote "$url" | @@PERL@@ -e "$find_matching_ref" "$head" "$headrev" "$tag_name")
 110
 111 url=$(git ls-remote --get-url "$url")
 112
 113 git show -s --format='The following changes since commit %H:
 114
 115   %s (%ci)
 116
 117 are available in the git repository at:
 118 ' $merge_base &&
 119 echo "  $url${ref+ $ref}" &&
 120 git show -s --format='
 121 for you to fetch changes up to %H:
 122
 123   %s (%ci)
 124
 125 ----------------------------------------------------------------' $headrev &&
 126
 127 if test -n "$branch_name"
 128 then
 129         echo "(from the branch description for $branch_name local branch)"
 130         echo
 131         git config "branch.$branch_name.description"
 132 fi &&
 133
 134 if test -n "$tag_name"
 135 then
 136         if test -z "$ref" || test "$ref" != "tags/$tag_name"
 137         then
 138                 echo >&2 "warn: You locally have $tag_name but it does not (yet)"
 139                 echo >&2 "warn: appear to be at $url"
 140                 echo >&2 "warn: Do you want to push it there, perhaps?"
 141         fi
 142         git cat-file tag "$tag_name" |
 143         sed -n -e '1,/^$/d' -e '/^-----BEGIN PGP /q' -e p
 144         echo
 145 fi &&
 146
 147 if test -n "$branch_name" || test -n "$tag_name"
 148 then
 149         echo "----------------------------------------------------------------"
 150 fi &&
 151
 152 git shortlog ^$baserev $headrev &&
 153 git diff -M --stat --summary $patch $merge_base..$headrev || status=1
 154
 155 if test -z "$ref"
 156 then
 157         echo "warn: No branch of $url is at:" >&2
 158         git show -s --format='warn:   %h: %s' $headrev >&2
 159         echo "warn: Are you sure you pushed '$head' there?" >&2
 160         status=1
 161 fi
 162 exit $status