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-rwxr-xr-xgit-clone.sh415
1 files changed, 415 insertions, 0 deletions
diff --git a/git-clone.sh b/git-clone.sh
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index 0000000000..0805168057
--- /dev/null
+++ b/git-clone.sh
@@ -0,0 +1,415 @@
+#!/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
+
+usage() {
+ echo >&2 "Usage: $0 [--use-separate-remote] [--reference <reference-repo>] [--bare] [-l [-s]] [-q] [-u <upload-pack>] [--origin <name>] [-n] <repo> [<dir>]"
+ exit 1
+}
+
+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 "$2" &&
+ clone_tmp='.git/clone-tmp' &&
+ mkdir -p "$clone_tmp" || exit 1
+ http_fetch "$1/info/refs" "$clone_tmp/refs" || {
+ echo >&2 "Cannot get remote repository information.
+Perhaps git-update-server-info needs to be run there?"
+ exit 1;
+ }
+ while read sha1 refname
+ do
+ name=`expr "z$refname" : 'zrefs/\(.*\)'` &&
+ case "$name" in
+ *^*) continue;;
+ esac
+ if test -n "$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, $tag_top);
+ next;
+ }
+}
+close FH;
+'
+
+quiet=
+local=no
+use_local=no
+local_shared=no
+no_checkout=
+upload_pack=
+bare=
+reference=
+origin=
+origin_override=
+use_separate_remote=
+while
+ case "$#,$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 ;;
+ *,-q|*,--quiet) quiet=-q ;;
+ *,--use-separate-remote)
+ use_separate_remote=t ;;
+ 1,--reference) usage ;;
+ *,--reference)
+ shift; reference="$1" ;;
+ *,--reference=*)
+ reference=`expr "$1" : '--reference=\(.*\)'` ;;
+ *,-o|*,--or|*,--ori|*,--orig|*,--origi|*,--origin)
+ case "$2" in
+ '')
+ usage ;;
+ */*)
+ echo >&2 "'$2' is not suitable for an origin name"
+ exit 1
+ esac
+ git-check-ref-format "heads/$2" || {
+ echo >&2 "'$2' is not suitable for a branch name"
+ exit 1
+ }
+ test -z "$origin_override" || {
+ echo >&2 "Do not give more than one --origin options."
+ exit 1
+ }
+ origin_override=yes
+ origin="$2"; shift
+ ;;
+ 1,-u|1,--upload-pack) usage ;;
+ *,-u|*,--upload-pack)
+ shift
+ upload_pack="--exec=$1" ;;
+ *,-*) usage ;;
+ *) break ;;
+ esac
+do
+ shift
+done
+
+repo="$1"
+if test -z "$repo"
+then
+ echo >&2 'you must specify a repository to clone.'
+ exit 1
+fi
+
+# --bare implies --no-checkout
+if test yes = "$bare"
+then
+ if test yes = "$origin_override"
+ then
+ echo >&2 '--bare and --origin $origin options are incompatible.'
+ exit 1
+ fi
+ if test t = "$use_separate_remote"
+ then
+ echo >&2 '--bare and --use-separate-remote options are incompatible.'
+ exit 1
+ fi
+ no_checkout=yes
+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 "$dir" ] && echo "$dir already exists." && usage
+mkdir -p "$dir" &&
+D=$(cd "$dir" && pwd) &&
+trap 'err=$?; cd ..; rm -r "$D"; exit $err' exit
+case "$bare" in
+yes) GIT_DIR="$D" ;;
+*) GIT_DIR="$D/.git" ;;
+esac && export GIT_DIR && git-init-db || usage
+case "$bare" in
+yes)
+ GIT_DIR="$D" ;;
+*)
+ GIT_DIR="$D/.git" ;;
+esac
+
+if test -n "$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 "$GIT_DIR/refs" &&
+ mkdir reference-tmp &&
+ cd reference-tmp &&
+ tar xf -)
+ else
+ echo >&2 "$reference: not a local directory." && usage
+ 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" ) || {
+ echo >&2 "-l flag seen but $repo is not local."
+ exit 1
+ }
+
+ case "$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"
+ {
+ test -f "$repo/objects/info/alternates" &&
+ cat "$repo/objects/info/alternates";
+ echo "$repo/objects"
+ } >"$GIT_DIR/objects/info/alternates"
+ ;;
+ esac
+ git-ls-remote "$repo" >"$GIT_DIR/CLONE_HEAD"
+ ;;
+*)
+ case "$repo" in
+ rsync://*)
+ 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"
+ ;;
+ http://*)
+ if test -z "@@NO_CURL@@"
+ then
+ clone_dumb_http "$repo" "$D"
+ else
+ echo >&2 "http transport not supported, rebuild Git with curl support"
+ exit 1
+ fi
+ ;;
+ *)
+ cd "$D" && case "$upload_pack" in
+ '') git-fetch-pack --all -k $quiet "$repo" ;;
+ *) git-fetch-pack --all -k $quiet "$upload_pack" "$repo" ;;
+ esac >"$GIT_DIR/CLONE_HEAD" || {
+ echo >&2 "fetch-pack from '$repo' failed."
+ exit 1
+ }
+ ;;
+ esac
+ ;;
+esac
+test -d "$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"
+fi
+
+cd "$D" || exit
+
+if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
+then
+ # Figure out which remote branch HEAD points at.
+ case "$use_separate_remote" in
+ '') remote_top=refs/heads ;;
+ *) remote_top="refs/remotes/$origin" ;;
+ esac
+
+ head_sha1=`cat "$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 $remote_top the remote HEAD seems to point at.
+ head_points_at=$(
+ (
+ 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 "$name"
+ done=t
+ fi
+ done
+ )
+ )
+
+ # Write out remotes/$origin file, and update our "$head_points_at".
+ case "$head_points_at" in
+ ?*)
+ mkdir -p "$GIT_DIR/remotes" &&
+ git-symbolic-ref HEAD "refs/heads/$head_points_at" &&
+ case "$use_separate_remote" in
+ t) origin_track="$remote_top/$head_points_at"
+ git-update-ref HEAD "$head_sha1" ;;
+ *) origin_track="$remote_top/$origin"
+ git-update-ref "refs/heads/$origin" "$head_sha1" ;;
+ esac &&
+ echo >"$GIT_DIR/remotes/$origin" \
+ "URL: $repo
+Pull: refs/heads/$head_points_at:$origin_track" &&
+ (cd "$GIT_DIR/$remote_top" && find . -type f -print) |
+ while read dotslref
+ do
+ name=`expr "$dotslref" : './\(.*\)'` &&
+ test "$use_separate_remote" = '' && {
+ test "$head_points_at" = "$name" ||
+ test "$origin" = "$name"
+ } ||
+ echo "Pull: refs/heads/${name}:$remote_top/${name}"
+ done >>"$GIT_DIR/remotes/$origin" &&
+ case "$use_separate_remote" in
+ t)
+ rm -f "refs/remotes/$origin/HEAD"
+ git-symbolic-ref "refs/remotes/$origin/HEAD" \
+ "refs/remotes/$origin/$head_points_at"
+ esac
+ esac
+
+ case "$no_checkout" in
+ '')
+ git-read-tree -m -u -v HEAD HEAD
+ esac
+fi
+rm -f "$GIT_DIR/CLONE_HEAD" "$GIT_DIR/REMOTE_HEAD"
+
+trap - exit
+
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