#!/bin/sh

# Copyright 2005, Ryan Anderson <ryan@michonline.com>

#

# This file is licensed under the GPL v2, or a later version

# at the discretion of Linus Torvalds.

SUBDIRECTORY_OK='Yes'

OPTIONS_KEEPDASHDASH=

OPTIONS_STUCKLONG=

OPTIONS_SPEC='git request-pull [options] start url [end]

--

p    show patch text as well

'

. git-sh-setup

GIT_PAGER=

export GIT_PAGER

patch=

while	case "$#" in 0) break ;; esac

do

	case "$1" in

	-p)

		patch=-p ;;

	--)

		shift; break ;;

	-*)

		usage ;;

	*)

		break ;;

	esac

	shift

done

base=$1 url=$2 status=0

test -n "$base" && test -n "$url" || usage

baserev=$(git rev-parse --verify --quiet "$base"^0)

if test -z "$baserev"

then

    die "fatal: Not a valid revision: $base"

fi

#

# $3 must be a symbolic ref, a unique ref, or

# a SHA object expression. It can also be of

# the format 'local-name:remote-name'.

#

local=${3%:*}

local=${local:-HEAD}

remote=${3#*:}

pretty_remote=${remote#refs/}

pretty_remote=${pretty_remote#heads/}

head=$(git symbolic-ref -q "$local")

head=${head:-$(git show-ref --heads --tags "$local" | cut -d' ' -f2)}

head=${head:-$(git rev-parse --quiet --verify "$local")}

# None of the above? Bad.

test -z "$head" && die "fatal: Not a valid revision: $local"

# This also verifies that the resulting head is unique:

# "git show-ref" could have shown multiple matching refs..

headrev=$(git rev-parse --verify --quiet "$head"^0)

test -z "$headrev" && die "fatal: Ambiguous revision: $local"

local_sha1=$(git rev-parse --verify --quiet "$head")

# Was it a branch with a description?

branch_name=${head#refs/heads/}

if test "z$branch_name" = "z$headref" ||

	! git config "branch.$branch_name.description" >/dev/null

then

	branch_name=

fi

merge_base=$(git merge-base $baserev $headrev) ||

die "fatal: No commits in common between $base and $head"

# $head is the refname from the command line.

# Find a ref with the same name as $head that exists at the remote

# and points to the same commit as the local object.

find_matching_ref='

	my ($head,$headrev) = (@ARGV);

	my $pattern = qr{/\Q$head\E$};

	my ($remote_sha1, $found);

	while (<STDIN>) {

		chomp;

		my ($sha1, $ref, $deref) = /^(\S+)\s+([^^]+)(\S*)$/;

		if ($sha1 eq $head) {

			$found = $remote_sha1 = $sha1;

			break;

		}

		if ($ref eq $head || $ref =~ $pattern) {

			if ($deref eq "") {

				# Remember the matching object on the remote side

				$remote_sha1 = $sha1;

			}

			if ($sha1 eq $headrev) {

				$found = $ref;

				break;

			}

		}

	}

	if ($found) {

		$remote_sha1 = $headrev if ! defined $remote_sha1;

		print "$remote_sha1 $found\n";

	}

'

set fnord $(git ls-remote "$url" | @@PERL@@ -e "$find_matching_ref" "${remote:-HEAD}" "$headrev")

remote_sha1=$2

ref=$3

if test -z "$ref"

then

	echo "warn: No match for commit $headrev found at $url" >&2

	echo "warn: Are you sure you pushed '${remote:-HEAD}' there?" >&2

	status=1

elif test "$local_sha1" != "$remote_sha1"

then

	echo "warn: $head found at $url but points to a different object" >&2

	echo "warn: Are you sure you pushed '${remote:-HEAD}' there?" >&2

	status=1

fi

# Special case: turn "for_linus" to "tags/for_linus" when it is correct

if test "$ref" = "refs/tags/$pretty_remote"

then

	pretty_remote=tags/$pretty_remote

fi

url=$(git ls-remote --get-url "$url")

git show -s --format='The following changes since commit %H:

  %s (%ci)

are available in the Git repository at:

' $merge_base &&

echo "  $url $pretty_remote" &&

git show -s --format='

for you to fetch changes up to %H:

  %s (%ci)

----------------------------------------------------------------' $headrev &&

if test $(git cat-file -t "$head") = tag

then

	git cat-file tag "$head" |

	sed -n -e '1,/^$/d' -e '/^-----BEGIN PGP /q' -e p

	echo

	echo "----------------------------------------------------------------"

fi &&

if test -n "$branch_name"

then

	echo "(from the branch description for $branch_name local branch)"

	echo

	git config "branch.$branch_name.description"

	echo "----------------------------------------------------------------"

fi &&

git shortlog ^$baserev $headrev &&

git diff -M --stat --summary $patch $merge_base..$headrev || status=1

exit $status