mirror of
https://github.com/git/git.git
synced 2024-11-05 16:52:59 +01:00
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>
176 lines
3.5 KiB
Bash
Executable file
176 lines
3.5 KiB
Bash
Executable file
#!/bin/sh
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. git-sh-setup || die "Not a git archive"
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get_data_source () {
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case "$1" in
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*/*)
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# Not so fast. This could be the partial URL shorthand...
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token=$(expr "$1" : '\([^/]*\)/')
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remainder=$(expr "$1" : '[^/]*/\(.*\)')
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if test -f "$GIT_DIR/branches/$token"
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then
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echo branches-partial
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else
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echo ''
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fi
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;;
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*)
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if test -f "$GIT_DIR/remotes/$1"
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then
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echo remotes
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elif test -f "$GIT_DIR/branches/$1"
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then
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echo branches
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else
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echo ''
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fi ;;
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esac
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}
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get_remote_url () {
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data_source=$(get_data_source "$1")
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case "$data_source" in
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'')
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echo "$1" ;;
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remotes)
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sed -ne '/^URL: */{
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s///p
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q
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}' "$GIT_DIR/remotes/$1" ;;
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branches)
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sed -e 's/#.*//' "$GIT_DIR/branches/$1" ;;
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branches-partial)
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token=$(expr "$1" : '\([^/]*\)/')
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remainder=$(expr "$1" : '[^/]*/\(.*\)')
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url=$(sed -e 's/#.*//' "$GIT_DIR/branches/$token")
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echo "$url/$remainder"
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;;
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*)
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die "internal error: get-remote-url $1" ;;
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esac
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}
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get_remote_default_refs_for_push () {
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data_source=$(get_data_source "$1")
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case "$data_source" in
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'' | branches | branches-partial)
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;; # no default push mapping, just send matching refs.
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remotes)
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sed -ne '/^Push: */{
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s///p
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}' "$GIT_DIR/remotes/$1" ;;
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*)
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die "internal error: get-remote-default-ref-for-push $1" ;;
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esac
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}
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# Subroutine to canonicalize remote:local notation
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canon_refs_list_for_fetch () {
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for ref
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do
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force=
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case "$ref" in
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+*)
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ref=$(expr "$ref" : '\+\(.*\)')
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force=+
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;;
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esac
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expr "$ref" : '.*:' >/dev/null || ref="${ref}:"
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remote=$(expr "$ref" : '\([^:]*\):')
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local=$(expr "$ref" : '[^:]*:\(.*\)')
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case "$remote" in
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'') remote=HEAD ;;
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refs/heads/* | refs/tags/*) ;;
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heads/* | tags/* ) remote="refs/$remote" ;;
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*) remote="refs/heads/$remote" ;;
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esac
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case "$local" in
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'') local= ;;
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refs/heads/* | refs/tags/*) ;;
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heads/* | tags/* ) local="refs/$local" ;;
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*) local="refs/heads/$local" ;;
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esac
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echo "${force}${remote}:${local}"
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done
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}
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# Returns list of src: (no store), or src:dst (store)
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get_remote_default_refs_for_fetch () {
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data_source=$(get_data_source "$1")
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case "$data_source" in
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'' | branches-partial)
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echo "HEAD:" ;;
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branches)
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remote_branch=$(sed -ne '/#/s/.*#//p' "$GIT_DIR/branches/$1")
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case "$remote_branch" in '') remote_branch=master ;; esac
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echo "refs/heads/${remote_branch}:refs/heads/$1"
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;;
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remotes)
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canon_refs_list_for_fetch $(sed -ne '/^Pull: */{
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s///p
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}' "$GIT_DIR/remotes/$1")
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;;
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*)
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die "internal error: get-remote-default-ref-for-push $1" ;;
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esac
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}
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get_remote_refs_for_push () {
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case "$#" in
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0) die "internal error: get-remote-refs-for-push." ;;
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1) get_remote_default_refs_for_push "$@" ;;
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*) shift; echo "$@" ;;
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esac
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}
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get_remote_refs_for_fetch () {
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case "$#" in
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0)
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die "internal error: get-remote-refs-for-fetch." ;;
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1)
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get_remote_default_refs_for_fetch "$@" ;;
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*)
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shift
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tag_just_seen=
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for ref
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do
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if test "$tag_just_seen"
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then
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echo "refs/tags/${ref}:refs/tags/${ref}"
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tag_just_seen=
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continue
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else
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case "$ref" in
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tag)
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tag_just_seen=yes
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continue
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;;
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esac
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fi
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canon_refs_list_for_fetch "$ref"
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done
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;;
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esac
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}
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resolve_alternates () {
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# original URL (xxx.git)
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top_=`expr "$1" : '\([^:]*:/*[^/]*\)/'`
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while read path
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do
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case "$path" in
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\#* | '')
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continue ;;
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/*)
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echo "$top_$path/" ;;
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../*)
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# relative -- ugly but seems to work.
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echo "$1/objects/$path/" ;;
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*)
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# exit code may not be caught by the reader.
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echo "bad alternate: $path"
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exit 1 ;;
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esac
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done
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}
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