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#!/bin/sh
#
# Copyright (c) 2005, Linus Torvalds
# Copyright (c) 2005, Junio C Hamano
#
# Clone a repository into a different directory that does not yet exist.
# See git-sh-setup why.
unset CDPATH
die() {
echo >&2 "$@"
exit 1
}
usage() {
die "Usage: $0 [--template=<template_directory>] [--reference <reference-repo>] [--bare] [-l [-s]] [-q] [-u <upload-pack>] [--origin <name>] [--depth <n>] [-n] <repo> [<dir>]"
}
get_repo_base() {
(cd "$1" && (cd .git ; pwd)) 2> /dev/null
}
if [ -n "$GIT_SSL_NO_VERIFY" ]; then
curl_extra_args="-k"
fi
http_fetch () {
# $1 = Remote, $2 = Local
curl -nsfL $curl_extra_args "$1" >"$2"
}
clone_dumb_http () {
# $1 - remote, $2 - local
cd "$2" &&
clone_tmp="$GIT_DIR/clone-tmp" &&
mkdir -p "$clone_tmp" || exit 1
if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
"`git-repo-config --bool http.noEPSV`" = true ]; then
curl_extra_args="${curl_extra_args} --disable-epsv"
fi
http_fetch "$1/info/refs" "$clone_tmp/refs" ||
die "Cannot get remote repository information.
Perhaps git-update-server-info needs to be run there?"
while read sha1 refname
do
name=`expr "z$refname" : 'zrefs/\(.*\)'` &&
case "$name" in
*^*) continue;;
esac
case "$bare,$name" in
yes,* | ,heads/* | ,tags/*) ;;
*) continue ;;
esac
if test -n "$use_separate_remote" &&
branch_name=`expr "z$name" : 'zheads/\(.*\)'`
then
tname="remotes/$origin/$branch_name"
else
tname=$name
fi
git-http-fetch -v -a -w "$tname" "$name" "$1/" || exit 1
done <"$clone_tmp/refs"
rm -fr "$clone_tmp"
http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD" ||
rm -f "$GIT_DIR/REMOTE_HEAD"
}
# Read git-fetch-pack -k output and store the remote branches.
copy_refs='
use File::Path qw(mkpath);
use File::Basename qw(dirname);
my $git_dir = $ARGV[0];
my $use_separate_remote = $ARGV[1];
my $origin = $ARGV[2];
my $branch_top = ($use_separate_remote ? "remotes/$origin" : "heads");
my $tag_top = "tags";
sub store {
my ($sha1, $name, $top) = @_;
$name = "$git_dir/refs/$top/$name";
mkpath(dirname($name));
open O, ">", "$name";
print O "$sha1\n";
close O;
}
open FH, "<", "$git_dir/CLONE_HEAD";
while (<FH>) {
my ($sha1, $name) = /^([0-9a-f]{40})\s(.*)$/;
next if ($name =~ /\^\173/);
if ($name eq "HEAD") {
open O, ">", "$git_dir/REMOTE_HEAD";
print O "$sha1\n";
close O;
next;
}
if ($name =~ s/^refs\/heads\///) {
store($sha1, $name, $branch_top);
next;
}
if ($name =~ s/^refs\/tags\///) {
store($sha1, $name, $tag_top);
next;
}
}
close FH;
'
quiet=
local=no
use_local=no
local_shared=no
unset template
no_checkout=
upload_pack=
bare=
reference=
origin=
origin_override=
use_separate_remote=t
depth=
while
case "$#,$1" in
0,*) break ;;
*,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
*,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
no_checkout=yes ;;
*,--na|*,--nak|*,--nake|*,--naked|\
*,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
*,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
*,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
local_shared=yes; use_local=yes ;;
1,--template) usage ;;
*,--template)
shift; template="--template=$1" ;;
*,--template=*)
template="$1" ;;
*,-q|*,--quiet) quiet=-q ;;
*,--use-separate-remote) ;;
*,--no-separate-remote)
die "clones are always made with separate-remote layout" ;;
1,--reference) usage ;;
*,--reference)
shift; reference="$1" ;;
*,--reference=*)
reference=`expr "z$1" : 'z--reference=\(.*\)'` ;;
*,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
case "$2" in
'')
usage ;;
*/*)
die "'$2' is not suitable for an origin name"
esac
git-check-ref-format "heads/$2" ||
die "'$2' is not suitable for a branch name"
test -z "$origin_override" ||
die "Do not give more than one --origin options."
origin_override=yes
origin="$2"; shift
;;
1,-u|1,--upload-pack) usage ;;
*,-u|*,--upload-pack)
shift
upload_pack="--exec=$1" ;;
1,--depth) usage;;
*,--depth)
shift
depth="--depth=$1";;
*,-*) usage ;;
*) break ;;
esac
do
shift
done
repo="$1"
test -n "$repo" ||
die 'you must specify a repository to clone.'
# --bare implies --no-checkout and --no-separate-remote
if test yes = "$bare"
then
if test yes = "$origin_override"
then
die '--bare and --origin $origin options are incompatible.'
fi
no_checkout=yes
use_separate_remote=
fi
if test -z "$origin"
then
origin=origin
fi
# Turn the source into an absolute path if
# it is local
if base=$(get_repo_base "$repo"); then
repo="$base"
local=yes
fi
dir="$2"
# Try using "humanish" part of source repo if user didn't specify one
[ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
[ -e "$dir" ] && die "destination directory '$dir' already exists."
mkdir -p "$dir" &&
D=$(cd "$dir" && pwd) &&
trap 'err=$?; cd ..; rm -rf "$D"; exit $err' 0
case "$bare" in
yes)
GIT_DIR="$D" ;;
*)
GIT_DIR="$D/.git" ;;
esac && export GIT_DIR && git-init-db ${template+"$template"} || usage
if test -n "$reference"
then
if test -d "$reference"
then
if test -d "$reference/.git/objects"
then
reference="$reference/.git"
fi
reference=$(cd "$reference" && pwd)
echo "$reference/objects" >"$GIT_DIR/objects/info/alternates"
(cd "$reference" && tar cf - refs) |
(cd "$GIT_DIR/refs" &&
mkdir reference-tmp &&
cd reference-tmp &&
tar xf -)
else
die "reference repository '$reference' is not a local directory."
fi
fi
rm -f "$GIT_DIR/CLONE_HEAD"
# We do local magic only when the user tells us to.
case "$local,$use_local" in
yes,yes)
( cd "$repo/objects" ) ||
die "-l flag seen but repository '$repo' is not local."
case "$local_shared" in
no)
# See if we can hardlink and drop "l" if not.
sample_file=$(cd "$repo" && \
find objects -type f -print | sed -e 1q)
# objects directory should not be empty since we are cloning!
test -f "$repo/$sample_file" || exit
l=
if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
then
l=l
fi &&
rm -f "$GIT_DIR/objects/sample" &&
cd "$repo" &&
find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
;;
yes)
mkdir -p "$GIT_DIR/objects/info"
echo "$repo/objects" >> "$GIT_DIR/objects/info/alternates"
;;
esac
git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
;;
*)
case "$repo" in
rsync://*)
case "$depth" in
"") ;;
*) die "shallow over rsync not supported" ;;
esac
rsync $quiet -av --ignore-existing \
--exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
exit
# Look at objects/info/alternates for rsync -- http will
# support it natively and git native ones will do it on the
# remote end. Not having that file is not a crime.
rsync -q "$repo/objects/info/alternates" \
"$GIT_DIR/TMP_ALT" 2>/dev/null ||
rm -f "$GIT_DIR/TMP_ALT"
if test -f "$GIT_DIR/TMP_ALT"
then
( cd "$D" &&
. git-parse-remote &&
resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
while read alt
do
case "$alt" in 'bad alternate: '*) die "$alt";; esac
case "$quiet" in
'') echo >&2 "Getting alternate: $alt" ;;
esac
rsync $quiet -av --ignore-existing \
--exclude info "$alt" "$GIT_DIR/objects" || exit
done
rm -f "$GIT_DIR/TMP_ALT"
fi
git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
;;
https://*|http://*|ftp://*)
case "$depth" in
"") ;;
*) die "shallow over http or ftp not supported" ;;
esac
if test -z "@@NO_CURL@@"
then
clone_dumb_http "$repo" "$D"
else
die "http transport not supported, rebuild Git with curl support"
fi
;;
*)
case "$upload_pack" in
'') git-fetch-pack --all -k $quiet $depth "$repo" ;;
*) git-fetch-pack --all -k $quiet "$upload_pack" $depth "$repo" ;;
esac >"$GIT_DIR/CLONE_HEAD" ||
die "fetch-pack from '$repo' failed."
;;
esac
;;
esac
test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
if test -f "$GIT_DIR/CLONE_HEAD"
then
# Read git-fetch-pack -k output and store the remote branches.
@@PERL@@ -e "$copy_refs" "$GIT_DIR" "$use_separate_remote" "$origin" ||
exit
fi
cd "$D" || exit
if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
then
# a non-bare repository is always in separate-remote layout
remote_top="refs/remotes/$origin"
head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
case "$head_sha1" in
'ref: refs/'*)
# Uh-oh, the remote told us (http transport done against
# new style repository with a symref HEAD).
# Ideally we should skip the guesswork but for now
# opt for minimum change.
head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
;;
esac
# The name under $remote_top the remote HEAD seems to point at.
head_points_at=$(
(
test -f "$GIT_DIR/$remote_top/master" && echo "master"
cd "$GIT_DIR/$remote_top" &&
find . -type f -print | sed -e 's/^\.\///'
) | (
done=f
while read name
do
test t = $done && continue
branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
if test "$head_sha1" = "$branch_tip"
then
echo "$name"
done=t
fi
done
)
)
# Write out remote.$origin config, and update our "$head_points_at".
case "$head_points_at" in
?*)
# Local default branch
git-symbolic-ref HEAD "refs/heads/$head_points_at" &&
# Tracking branch for the primary branch at the remote.
origin_track="$remote_top/$head_points_at" &&
git-update-ref HEAD "$head_sha1" &&
# Upstream URL
git-repo-config remote."$origin".url "$repo" &&
# Set up the mappings to track the remote branches.
git-repo-config remote."$origin".fetch \
"+refs/heads/*:$remote_top/*" '^$' &&
rm -f "refs/remotes/$origin/HEAD"
git-symbolic-ref "refs/remotes/$origin/HEAD" \
"refs/remotes/$origin/$head_points_at" &&
git-repo-config branch."$head_points_at".remote "$origin" &&
git-repo-config branch."$head_points_at".merge "refs/heads/$head_points_at"
esac
case "$no_checkout" in
'')
test "z$quiet" = z && v=-v || v=
git-read-tree -m -u $v HEAD HEAD
esac
fi
rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
trap - 0
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