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1f7d1a53fe
When using --reference to borrow objects from a neighbouring repository while cloning, we copy the entire set of refs under temporary "refs/reference-tmp/refs" space and set up the object alternates. However, a textual symref copied this way would not point at the right place, and causes later steps to emit error messages (which is harmless but still alarming). This is most visible when using a clone created with the separate-remote layout as a reference, because such a repository would have refs/remotes/origin/HEAD with 'ref: refs/remotes/origin/master' as its contents. Although we do not create symbolic-link based refs anymore, they have the same problem because they are always supposed to be relative to refs/ hierarchy (we dereference by hand, so it only is good for HEAD and nothing else). In either case, the solution is simply to remove them after copying under refs/reference-tmp; if a symref points at a true ref, that true ref itself is enough to ensure that objects reachable from it do not needlessly get fetched. Signed-off-by: Junio C Hamano <junkio@cox.net>
418 lines
10 KiB
Bash
Executable file
418 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>] [--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-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 "$name" in
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*^*) continue;;
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esac
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case "$bare,$name" in
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yes,* | ,heads/* | ,tags/*) ;;
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*) continue ;;
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esac
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if test -n "$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 "$GIT_DIR/REMOTE_HEAD"
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}
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quiet=
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local=no
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use_local=no
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local_shared=no
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unset template
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no_checkout=
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upload_pack=
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bare=
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reference=
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origin=
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origin_override=
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use_separate_remote=t
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depth=
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while
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case "$#,$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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*,--no-separate-remote)
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die "clones are always made with separate-remote layout" ;;
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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="--upload-pack=$1" ;;
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*,--upload-pack=*)
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upload_pack=--upload-pack=$(expr "z$1" : 'z-[^=]*=\(.*\)') ;;
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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 --no-separate-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 ${template+"$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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find refs ! -type d -print |
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while read ref
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do
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if test -h "$ref"
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then
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# Old-style symbolic link ref. Not likely
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# to appear under refs/ but we might as well
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# deal with them.
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:
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elif test -f "$ref"
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then
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point=$(cat "$ref") &&
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case "$point" in
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'ref: '*) ;;
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*) continue ;;
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esac
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fi
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# The above makes true ref to 'continue' and
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# we will come here when we are looking at
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# symbolic link ref or a textual symref (or
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# garbage, like fifo).
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# The true ref pointed at by it is enough to
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# ensure that we do not fetch objects reachable
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# from it.
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rm -f "$ref"
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done
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)
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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 "$GIT_DIR/CLONE_HEAD"
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then
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# Read git-fetch-pack -k output and store the remote branches.
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if [ -n "$use_separate_remote" ]
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then
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branch_top="remotes/$origin"
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else
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branch_top="heads"
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fi
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tag_top="tags"
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while read sha1 name
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do
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case "$name" in
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*'^{}')
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continue ;;
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HEAD)
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destname="REMOTE_HEAD" ;;
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refs/heads/*)
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destname="refs/$branch_top/${name#refs/heads/}" ;;
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refs/tags/*)
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destname="refs/$tag_top/${name#refs/tags/}" ;;
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*)
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continue ;;
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esac
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git-update-ref -m "clone: from $repo" "$destname" "$sha1" ""
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done < "$GIT_DIR/CLONE_HEAD"
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fi
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cd "$D" || exit
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if test -z "$bare" && test -f "$GIT_DIR/REMOTE_HEAD"
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then
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# a non-bare repository is always in separate-remote layout
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remote_top="refs/remotes/$origin"
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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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test -f "$GIT_DIR/$remote_top/master" && 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 "$name"
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done=t
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fi
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done
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)
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)
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# Write out remote.$origin config, and update our "$head_points_at".
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case "$head_points_at" in
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?*)
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# Local default branch
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git-symbolic-ref HEAD "refs/heads/$head_points_at" &&
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# Tracking branch for the primary branch at the remote.
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origin_track="$remote_top/$head_points_at" &&
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git-update-ref HEAD "$head_sha1" &&
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# Upstream URL
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git-config remote."$origin".url "$repo" &&
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# Set up the mappings to track the remote branches.
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git-config remote."$origin".fetch \
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"+refs/heads/*:$remote_top/*" '^$' &&
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rm -f "refs/remotes/$origin/HEAD"
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git-symbolic-ref "refs/remotes/$origin/HEAD" \
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"refs/remotes/$origin/$head_points_at" &&
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git-config branch."$head_points_at".remote "$origin" &&
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git-config branch."$head_points_at".merge "refs/heads/$head_points_at"
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esac
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case "$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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