mirror of
https://github.com/git/git
synced 2024-08-28 12:09:19 +00:00
4447badcd2
For local operations and downloading and uploading via git aware protocols, use of $GIT_OBJECT_DIRECTORY/info/alternates is recommended on the server side for big projects that are derived from another one (like Linux kernel). However, dumb protocols and rsync transport needs to resolve this on the client end, which we did not bother doing until this week. I noticed we use "rsync -z" but most of our payload is already compressed, which was not quite right. This commit also fixes it. Signed-off-by: Junio C Hamano <junkio@cox.net>
193 lines
4.3 KiB
Bash
Executable file
193 lines
4.3 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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usage() {
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echo >&2 "* git clone [-l [-s]] [-q] [-u <upload-pack>] <repo> <dir>"
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exit 1
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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 -nsf $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 "$2" &&
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clone_tmp='.git/clone-tmp' &&
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mkdir -p "$clone_tmp" || exit 1
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http_fetch "$1/info/refs" "$clone_tmp/refs" &&
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http_fetch "$1/objects/info/packs" "$clone_tmp/packs" || {
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echo >&2 "Cannot get remote repository information.
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Perhaps git-update-server-info needs to be run there?"
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exit 1;
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}
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while read type name
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do
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case "$type" in
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P) ;;
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*) continue ;;
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esac &&
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idx=`expr "$name" : '\(.*\)\.pack'`.idx
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http_fetch "$1/objects/pack/$name" ".git/objects/pack/$name" &&
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http_fetch "$1/objects/pack/$idx" ".git/objects/pack/$idx" &&
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git-verify-pack ".git/objects/pack/$idx" || exit 1
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done <"$clone_tmp/packs"
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while read sha1 refname
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do
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name=`expr "$refname" : 'refs/\(.*\)'` &&
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git-http-fetch -v -a -w "$name" "$name" "$1/" || exit 1
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done <"$clone_tmp/refs"
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rm -fr "$clone_tmp"
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}
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quiet=
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use_local=no
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local_shared=no
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upload_pack=
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while
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case "$#,$1" in
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0,*) break ;;
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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 ;;
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*,-q|*,--quiet) quiet=-q ;;
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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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*,-*) 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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# Turn the source into an absolute path if
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# it is local
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repo="$1"
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local=no
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if base=$(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="$2"
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mkdir "$dir" &&
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D=$(
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(cd "$dir" && git-init-db && pwd)
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) &&
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test -d "$D" || usage
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# We do local magic only when the user tells us to.
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case "$local,$use_local" in
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yes,yes)
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( cd "$repo/objects" ) || {
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echo >&2 "-l flag seen but $repo is not local."
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exit 1
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}
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case "$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" "$D/.git/objects/sample" 2>/dev/null
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then
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l=l
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fi &&
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rm -f "$D/.git/objects/sample" &&
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cd "$repo" &&
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find objects -type f -print |
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cpio -puamd$l "$D/.git/" || exit 1
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;;
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yes)
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mkdir -p "$D/.git/objects/info"
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{
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test -f "$repo/objects/info/alternates" &&
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cat "$repo/objects/info/alternates";
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echo "$repo/objects"
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} >"$D/.git/objects/info/alternates"
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;;
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esac
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# Make a duplicate of refs and HEAD pointer
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HEAD=
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if test -f "$repo/HEAD"
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then
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HEAD=HEAD
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fi
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tar Ccf "$repo" - refs $HEAD | tar Cxf "$D/.git" - || 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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rsync $quiet -av --ignore-existing \
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--exclude info "$repo/objects/" "$D/.git/objects/" &&
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rsync $quiet -av --ignore-existing \
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--exclude info "$repo/refs/" "$D/.git/refs/" || exit
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# Look at objects/info/alternates for rsync -- http will
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# support it natively and git native ones will do it on the
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# remote end. Not having that file is not a crime.
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rsync -q "$repo/objects/info/alternates" "$D/.git/TMP_ALT" ||
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rm -f "$D/.git/TMP_ALT"
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if test -f "$D/.git/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/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" "$D/.git/objects" || exit
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done
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rm -f "$D/.git/TMP_ALT"
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fi
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;;
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http://*)
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clone_dumb_http "$repo" "$D"
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;;
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*)
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cd "$D" && case "$upload_pack" in
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'') git-clone-pack $quiet "$repo" ;;
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*) git-clone-pack $quiet "$upload_pack" "$repo" ;;
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esac
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;;
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esac
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;;
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esac
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# Update origin.
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mkdir -p "$D/.git/remotes/" &&
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rm -f "$D/.git/remotes/origin" &&
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echo >"$D/.git/remotes/origin" \
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"URL: $repo
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Pull: master:origin"
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