mirror of
https://github.com/git/git.git
synced 2024-11-18 02:14:03 +01:00
016e6ccbe0
By specifying a depth, you can now clone a repository such that
all fetched ancestor-chains' length is at most "depth". For example,
if the upstream repository has only 2 branches ("A" and "B"), which
are linear, and you specify depth 3, you will get A, A~1, A~2, A~3,
B, B~1, B~2, and B~3. The ends are automatically made shallow
commits.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
425 lines
10 KiB
Bash
Executable File
425 lines
10 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2005, Linus Torvalds
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# Copyright (c) 2005, Junio C Hamano
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#
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# Clone a repository into a different directory that does not yet exist.
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# See git-sh-setup why.
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unset CDPATH
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die() {
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echo >&2 "$@"
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exit 1
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}
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usage() {
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die "Usage: $0 [--template=<template_directory>] [--use-immingled-remote] [--reference <reference-repo>] [--bare] [-l [-s]] [-q] [-u <upload-pack>] [--origin <name>] [--depth <n>] [-n] <repo> [<dir>]"
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}
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get_repo_base() {
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(cd "$1" && (cd .git ; pwd)) 2> /dev/null
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}
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if [ -n "$GIT_SSL_NO_VERIFY" ]; then
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curl_extra_args="-k"
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fi
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http_fetch () {
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# $1 = Remote, $2 = Local
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curl -nsfL $curl_extra_args "$1" >"$2"
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}
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clone_dumb_http () {
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# $1 - remote, $2 - local
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cd "$2" &&
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clone_tmp="$GIT_DIR/clone-tmp" &&
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mkdir -p "$clone_tmp" || exit 1
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if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
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"`git-repo-config --bool http.noEPSV`" = true ]; then
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curl_extra_args="${curl_extra_args} --disable-epsv"
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fi
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http_fetch "$1/info/refs" "$clone_tmp/refs" ||
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die "Cannot get remote repository information.
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Perhaps git-update-server-info needs to be run there?"
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while read sha1 refname
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do
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name=`expr "z$refname" : 'zrefs/\(.*\)'` &&
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case "$name" in
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*^*) continue;;
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esac
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if test -n "$use_separate_remote" &&
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branch_name=`expr "z$name" : 'zheads/\(.*\)'`
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then
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tname="remotes/$origin/$branch_name"
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else
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tname=$name
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fi
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git-http-fetch -v -a -w "$tname" "$name" "$1/" || exit 1
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done <"$clone_tmp/refs"
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rm -fr "$clone_tmp"
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http_fetch "$1/HEAD" "$GIT_DIR/REMOTE_HEAD" ||
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rm -f "$GIT_DIR/REMOTE_HEAD"
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}
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# Read git-fetch-pack -k output and store the remote branches.
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copy_refs='
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use File::Path qw(mkpath);
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use File::Basename qw(dirname);
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my $git_dir = $ARGV[0];
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my $use_separate_remote = $ARGV[1];
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my $origin = $ARGV[2];
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my $branch_top = ($use_separate_remote ? "remotes/$origin" : "heads");
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my $tag_top = "tags";
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sub store {
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my ($sha1, $name, $top) = @_;
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$name = "$git_dir/refs/$top/$name";
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mkpath(dirname($name));
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open O, ">", "$name";
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print O "$sha1\n";
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close O;
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}
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open FH, "<", "$git_dir/CLONE_HEAD";
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while (<FH>) {
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my ($sha1, $name) = /^([0-9a-f]{40})\s(.*)$/;
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next if ($name =~ /\^\173/);
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if ($name eq "HEAD") {
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open O, ">", "$git_dir/REMOTE_HEAD";
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print O "$sha1\n";
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close O;
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next;
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}
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if ($name =~ s/^refs\/heads\///) {
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store($sha1, $name, $branch_top);
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next;
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}
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if ($name =~ s/^refs\/tags\///) {
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store($sha1, $name, $tag_top);
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next;
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}
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}
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close FH;
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'
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quiet=
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local=no
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use_local=no
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local_shared=no
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unset template
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no_checkout=
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upload_pack=
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bare=
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reference=
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origin=
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origin_override=
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use_separate_remote=t
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depth=
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while
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case "$#,$1" in
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0,*) break ;;
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*,-n|*,--no|*,--no-|*,--no-c|*,--no-ch|*,--no-che|*,--no-chec|\
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*,--no-check|*,--no-checko|*,--no-checkou|*,--no-checkout)
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no_checkout=yes ;;
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*,--na|*,--nak|*,--nake|*,--naked|\
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*,-b|*,--b|*,--ba|*,--bar|*,--bare) bare=yes ;;
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*,-l|*,--l|*,--lo|*,--loc|*,--loca|*,--local) use_local=yes ;;
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*,-s|*,--s|*,--sh|*,--sha|*,--shar|*,--share|*,--shared)
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local_shared=yes; use_local=yes ;;
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1,--template) usage ;;
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*,--template)
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shift; template="--template=$1" ;;
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*,--template=*)
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template="$1" ;;
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*,-q|*,--quiet) quiet=-q ;;
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*,--use-separate-remote)
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# default
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use_separate_remote=t ;;
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*,--use-immingled-remote)
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use_separate_remote= ;;
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1,--reference) usage ;;
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*,--reference)
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shift; reference="$1" ;;
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*,--reference=*)
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reference=`expr "z$1" : 'z--reference=\(.*\)'` ;;
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*,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
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case "$2" in
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'')
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usage ;;
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*/*)
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die "'$2' is not suitable for an origin name"
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esac
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git-check-ref-format "heads/$2" ||
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die "'$2' is not suitable for a branch name"
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test -z "$origin_override" ||
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die "Do not give more than one --origin options."
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origin_override=yes
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origin="$2"; shift
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;;
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1,-u|1,--upload-pack) usage ;;
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*,-u|*,--upload-pack)
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shift
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upload_pack="--exec=$1" ;;
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1,--depth) usage;;
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*,--depth)
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shift
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depth="--depth=$1";;
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*,-*) usage ;;
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*) break ;;
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esac
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do
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shift
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done
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repo="$1"
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test -n "$repo" ||
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die 'you must specify a repository to clone.'
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# --bare implies --no-checkout and --use-immingled-remote
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if test yes = "$bare"
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then
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if test yes = "$origin_override"
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then
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die '--bare and --origin $origin options are incompatible.'
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fi
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no_checkout=yes
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use_separate_remote=
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fi
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if test -z "$origin"
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then
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origin=origin
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fi
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# Turn the source into an absolute path if
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# it is local
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if base=$(get_repo_base "$repo"); then
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repo="$base"
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local=yes
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fi
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dir="$2"
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# Try using "humanish" part of source repo if user didn't specify one
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[ -z "$dir" ] && dir=$(echo "$repo" | sed -e 's|/$||' -e 's|:*/*\.git$||' -e 's|.*[/:]||g')
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[ -e "$dir" ] && die "destination directory '$dir' already exists."
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mkdir -p "$dir" &&
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D=$(cd "$dir" && pwd) &&
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trap 'err=$?; cd ..; rm -rf "$D"; exit $err' 0
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case "$bare" in
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yes)
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GIT_DIR="$D" ;;
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*)
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GIT_DIR="$D/.git" ;;
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esac && export GIT_DIR && git-init-db ${template+"$template"} || usage
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if test -n "$reference"
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then
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if test -d "$reference"
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then
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if test -d "$reference/.git/objects"
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then
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reference="$reference/.git"
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fi
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reference=$(cd "$reference" && pwd)
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echo "$reference/objects" >"$GIT_DIR/objects/info/alternates"
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(cd "$reference" && tar cf - refs) |
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(cd "$GIT_DIR/refs" &&
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mkdir reference-tmp &&
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cd reference-tmp &&
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tar xf -)
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else
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die "reference repository '$reference' is not a local directory."
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fi
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fi
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rm -f "$GIT_DIR/CLONE_HEAD"
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# We do local magic only when the user tells us to.
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case "$local,$use_local" in
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yes,yes)
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( cd "$repo/objects" ) ||
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die "-l flag seen but repository '$repo' is not local."
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case "$local_shared" in
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no)
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# See if we can hardlink and drop "l" if not.
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sample_file=$(cd "$repo" && \
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find objects -type f -print | sed -e 1q)
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# objects directory should not be empty since we are cloning!
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test -f "$repo/$sample_file" || exit
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l=
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if ln "$repo/$sample_file" "$GIT_DIR/objects/sample" 2>/dev/null
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then
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l=l
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fi &&
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rm -f "$GIT_DIR/objects/sample" &&
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cd "$repo" &&
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find objects -depth -print | cpio -pumd$l "$GIT_DIR/" || exit 1
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;;
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yes)
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mkdir -p "$GIT_DIR/objects/info"
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echo "$repo/objects" >> "$GIT_DIR/objects/info/alternates"
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;;
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esac
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git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
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;;
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*)
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case "$repo" in
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rsync://*)
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case "$depth" in
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"") ;;
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*) die "shallow over rsync not supported" ;;
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esac
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rsync $quiet -av --ignore-existing \
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--exclude info "$repo/objects/" "$GIT_DIR/objects/" ||
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exit
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# Look at objects/info/alternates for rsync -- http will
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# support it natively and git native ones will do it on the
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# remote end. Not having that file is not a crime.
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rsync -q "$repo/objects/info/alternates" \
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"$GIT_DIR/TMP_ALT" 2>/dev/null ||
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rm -f "$GIT_DIR/TMP_ALT"
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if test -f "$GIT_DIR/TMP_ALT"
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then
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( cd "$D" &&
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. git-parse-remote &&
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resolve_alternates "$repo" <"$GIT_DIR/TMP_ALT" ) |
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while read alt
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do
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case "$alt" in 'bad alternate: '*) die "$alt";; esac
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case "$quiet" in
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'') echo >&2 "Getting alternate: $alt" ;;
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esac
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rsync $quiet -av --ignore-existing \
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--exclude info "$alt" "$GIT_DIR/objects" || exit
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done
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rm -f "$GIT_DIR/TMP_ALT"
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fi
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git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD" || exit 1
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;;
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https://*|http://*|ftp://*)
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case "$depth" in
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"") ;;
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*) die "shallow over http or ftp not supported" ;;
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esac
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if test -z "@@NO_CURL@@"
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then
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clone_dumb_http "$repo" "$D"
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else
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die "http transport not supported, rebuild Git with curl support"
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fi
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;;
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*)
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case "$upload_pack" in
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'') git-fetch-pack --all -k $quiet $depth "$repo" ;;
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*) git-fetch-pack --all -k $quiet "$upload_pack" $depth "$repo" ;;
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esac >"$GIT_DIR/CLONE_HEAD" ||
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die "fetch-pack from '$repo' failed."
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;;
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esac
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;;
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esac
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test -d "$GIT_DIR/refs/reference-tmp" && rm -fr "$GIT_DIR/refs/reference-tmp"
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if test -f "$GIT_DIR/CLONE_HEAD"
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then
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# Read git-fetch-pack -k output and store the remote branches.
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@@PERL@@ -e "$copy_refs" "$GIT_DIR" "$use_separate_remote" "$origin" ||
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exit
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fi
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cd "$D" || exit
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if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
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then
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# Figure out which remote branch HEAD points at.
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case "$use_separate_remote" in
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'') remote_top=refs/heads ;;
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*) remote_top="refs/remotes/$origin" ;;
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esac
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head_sha1=`cat "$GIT_DIR/REMOTE_HEAD"`
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case "$head_sha1" in
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'ref: refs/'*)
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# Uh-oh, the remote told us (http transport done against
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# new style repository with a symref HEAD).
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# Ideally we should skip the guesswork but for now
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# opt for minimum change.
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head_sha1=`expr "z$head_sha1" : 'zref: refs/heads/\(.*\)'`
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head_sha1=`cat "$GIT_DIR/$remote_top/$head_sha1"`
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;;
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esac
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# The name under $remote_top the remote HEAD seems to point at.
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head_points_at=$(
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(
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echo "master"
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cd "$GIT_DIR/$remote_top" &&
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find . -type f -print | sed -e 's/^\.\///'
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) | (
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done=f
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while read name
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do
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test t = $done && continue
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branch_tip=`cat "$GIT_DIR/$remote_top/$name"`
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if test "$head_sha1" = "$branch_tip"
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then
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echo "$name"
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done=t
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fi
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done
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)
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)
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# Write out remotes/$origin file, and update our "$head_points_at".
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case "$head_points_at" in
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?*)
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mkdir -p "$GIT_DIR/remotes" &&
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git-symbolic-ref HEAD "refs/heads/$head_points_at" &&
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case "$use_separate_remote" in
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t) origin_track="$remote_top/$head_points_at"
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git-update-ref HEAD "$head_sha1" ;;
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*) origin_track="$remote_top/$origin"
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git-update-ref "refs/heads/$origin" "$head_sha1" ;;
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esac &&
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echo >"$GIT_DIR/remotes/$origin" \
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"URL: $repo
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Pull: refs/heads/$head_points_at:$origin_track" &&
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(cd "$GIT_DIR/$remote_top" && find . -type f -print) |
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while read dotslref
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do
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name=`expr "$dotslref" : './\(.*\)'`
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if test "z$head_points_at" = "z$name"
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then
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continue
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fi
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if test "$use_separate_remote" = '' &&
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test "z$origin" = "z$name"
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then
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continue
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fi
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echo "Pull: refs/heads/${name}:$remote_top/${name}"
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done >>"$GIT_DIR/remotes/$origin" &&
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case "$use_separate_remote" in
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t)
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rm -f "refs/remotes/$origin/HEAD"
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git-symbolic-ref "refs/remotes/$origin/HEAD" \
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"refs/remotes/$origin/$head_points_at"
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esac
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esac
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case "$no_checkout" in
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'')
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test "z$quiet" = z && v=-v || v=
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git-read-tree -m -u $v HEAD HEAD
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esac
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fi
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rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
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trap - 0
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