зеркало из https://github.com/microsoft/git.git
492 строки
11 KiB
Bash
Executable File
492 строки
11 KiB
Bash
Executable File
#!/bin/sh
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#
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USAGE='<fetch-options> <repository> <refspec>...'
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SUBDIRECTORY_OK=Yes
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. git-sh-setup
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set_reflog_action "fetch $*"
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TOP=$(git-rev-parse --show-cdup)
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if test ! -z "$TOP"
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then
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cd "$TOP"
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fi
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. git-parse-remote
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_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
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_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
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LF='
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'
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IFS="$LF"
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no_tags=
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tags=
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append=
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force=
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verbose=
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update_head_ok=
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exec=
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upload_pack=
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keep=
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shallow_depth=
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while case "$#" in 0) break ;; esac
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do
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case "$1" in
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-a|--a|--ap|--app|--appe|--appen|--append)
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append=t
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;;
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--upl|--uplo|--uploa|--upload|--upload-|--upload-p|\
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--upload-pa|--upload-pac|--upload-pack)
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shift
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exec="--exec=$1"
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upload_pack="-u $1"
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;;
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-f|--f|--fo|--for|--forc|--force)
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force=t
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;;
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-t|--t|--ta|--tag|--tags)
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tags=t
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;;
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-n|--n|--no|--no-|--no-t|--no-ta|--no-tag|--no-tags)
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no_tags=t
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;;
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-u|--u|--up|--upd|--upda|--updat|--update|--update-|--update-h|\
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--update-he|--update-hea|--update-head|--update-head-|\
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--update-head-o|--update-head-ok)
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update_head_ok=t
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;;
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-v|--verbose)
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verbose=Yes
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;;
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-k|--k|--ke|--kee|--keep)
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keep='-k -k'
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;;
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--depth=*)
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shallow_depth="--depth=`expr "z$1" : 'z-[^=]*=\(.*\)'`"
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;;
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--depth)
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shift
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shallow_depth="--depth=$1"
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;;
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-*)
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usage
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;;
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*)
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break
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;;
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esac
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shift
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done
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case "$#" in
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0)
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origin=$(get_default_remote)
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test -n "$(get_remote_url ${origin})" ||
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die "Where do you want to fetch from today?"
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set x $origin ; shift ;;
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esac
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remote_nick="$1"
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remote=$(get_remote_url "$@")
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refs=
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rref=
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rsync_slurped_objects=
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if test "" = "$append"
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then
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: >"$GIT_DIR/FETCH_HEAD"
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fi
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# Global that is reused later
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ls_remote_result=$(git ls-remote $upload_pack "$remote") ||
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die "Cannot get the repository state from $remote"
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append_fetch_head () {
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head_="$1"
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remote_="$2"
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remote_name_="$3"
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remote_nick_="$4"
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local_name_="$5"
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case "$6" in
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t) not_for_merge_='not-for-merge' ;;
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'') not_for_merge_= ;;
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esac
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# remote-nick is the URL given on the command line (or a shorthand)
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# remote-name is the $GIT_DIR relative refs/ path we computed
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# for this refspec.
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# the $note_ variable will be fed to git-fmt-merge-msg for further
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# processing.
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case "$remote_name_" in
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HEAD)
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note_= ;;
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refs/heads/*)
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note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
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note_="branch '$note_' of " ;;
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refs/tags/*)
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note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
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note_="tag '$note_' of " ;;
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refs/remotes/*)
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note_="$(expr "$remote_name_" : 'refs/remotes/\(.*\)')"
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note_="remote branch '$note_' of " ;;
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*)
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note_="$remote_name of " ;;
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esac
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remote_1_=$(expr "z$remote_" : 'z\(.*\)\.git/*$') &&
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remote_="$remote_1_"
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note_="$note_$remote_"
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# 2.6.11-tree tag would not be happy to be fed to resolve.
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if git-cat-file commit "$head_" >/dev/null 2>&1
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then
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headc_=$(git-rev-parse --verify "$head_^0") || exit
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echo "$headc_ $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
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else
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echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
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fi
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update_local_ref "$local_name_" "$head_" "$note_"
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}
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update_local_ref () {
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# If we are storing the head locally make sure that it is
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# a fast forward (aka "reverse push").
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label_=$(git-cat-file -t $2)
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newshort_=$(git-rev-parse --short $2)
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if test -z "$1" ; then
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[ "$verbose" ] && echo >&2 "* fetched $3"
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[ "$verbose" ] && echo >&2 " $label_: $newshort_"
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return 0
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fi
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oldshort_=$(git show-ref --hash --abbrev "$1" 2>/dev/null)
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case "$1" in
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refs/tags/*)
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# Tags need not be pointing at commits so there
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# is no way to guarantee "fast-forward" anyway.
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if test -n "$oldshort_"
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then
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if now_=$(git show-ref --hash "$1") && test "$now_" = "$2"
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then
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[ "$verbose" ] && echo >&2 "* $1: same as $3"
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[ "$verbose" ] && echo >&2 " $label_: $newshort_" ||:
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else
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echo >&2 "* $1: updating with $3"
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echo >&2 " $label_: $newshort_"
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git-update-ref -m "$GIT_REFLOG_ACTION: updating tag" "$1" "$2"
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fi
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else
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echo >&2 "* $1: storing $3"
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echo >&2 " $label_: $newshort_"
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git-update-ref -m "$GIT_REFLOG_ACTION: storing tag" "$1" "$2"
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fi
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;;
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refs/heads/* | refs/remotes/*)
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# $1 is the ref being updated.
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# $2 is the new value for the ref.
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local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
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if test "$local"
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then
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# Require fast-forward.
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mb=$(git-merge-base "$local" "$2") &&
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case "$2,$mb" in
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$local,*)
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if test -n "$verbose"
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then
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echo >&2 "* $1: same as $3"
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echo >&2 " $label_: $newshort_"
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fi
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;;
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*,$local)
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echo >&2 "* $1: fast forward to $3"
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echo >&2 " old..new: $oldshort_..$newshort_"
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git-update-ref -m "$GIT_REFLOG_ACTION: fast-forward" "$1" "$2" "$local"
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;;
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*)
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false
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;;
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esac || {
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case ",$force,$single_force," in
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*,t,*)
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echo >&2 "* $1: forcing update to non-fast forward $3"
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echo >&2 " old...new: $oldshort_...$newshort_"
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git-update-ref -m "$GIT_REFLOG_ACTION: forced-update" "$1" "$2" "$local"
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;;
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*)
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echo >&2 "* $1: not updating to non-fast forward $3"
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echo >&2 " old...new: $oldshort_...$newshort_"
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exit 1
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;;
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esac
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}
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else
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echo >&2 "* $1: storing $3"
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echo >&2 " $label_: $newshort_"
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git-update-ref -m "$GIT_REFLOG_ACTION: storing head" "$1" "$2"
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fi
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;;
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esac
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}
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case "$update_head_ok" in
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'')
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orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
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;;
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esac
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# If --tags (and later --heads or --all) is specified, then we are
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# not talking about defaults stored in Pull: line of remotes or
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# branches file, and just fetch those and refspecs explicitly given.
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# Otherwise we do what we always did.
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reflist=$(get_remote_refs_for_fetch "$@")
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if test "$tags"
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then
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taglist=`IFS=' ' &&
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echo "$ls_remote_result" |
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while read sha1 name
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do
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case "$sha1" in
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fail)
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exit 1
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esac
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case "$name" in
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*^*) continue ;;
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refs/tags/*) ;;
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*) continue ;;
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esac
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if git-check-ref-format "$name"
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then
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echo ".${name}:${name}"
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else
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echo >&2 "warning: tag ${name} ignored"
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fi
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done` || exit
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if test "$#" -gt 1
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then
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# remote URL plus explicit refspecs; we need to merge them.
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reflist="$reflist$LF$taglist"
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else
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# No explicit refspecs; fetch tags only.
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reflist=$taglist
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fi
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fi
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fetch_main () {
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reflist="$1"
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refs=
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rref=
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for ref in $reflist
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do
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refs="$refs$LF$ref"
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# These are relative path from $GIT_DIR, typically starting at refs/
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# but may be HEAD
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if expr "z$ref" : 'z\.' >/dev/null
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then
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not_for_merge=t
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ref=$(expr "z$ref" : 'z\.\(.*\)')
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else
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not_for_merge=
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fi
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if expr "z$ref" : 'z+' >/dev/null
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then
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single_force=t
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ref=$(expr "z$ref" : 'z+\(.*\)')
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else
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single_force=
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fi
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remote_name=$(expr "z$ref" : 'z\([^:]*\):')
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local_name=$(expr "z$ref" : 'z[^:]*:\(.*\)')
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rref="$rref$LF$remote_name"
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# There are transports that can fetch only one head at a time...
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case "$remote" in
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http://* | https://* | ftp://*)
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test -n "$shallow_depth" &&
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die "shallow clone with http not supported"
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proto=`expr "$remote" : '\([^:]*\):'`
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if [ -n "$GIT_SSL_NO_VERIFY" ]; then
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curl_extra_args="-k"
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fi
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if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
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"`git-repo-config --bool http.noEPSV`" = true ]; then
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noepsv_opt="--disable-epsv"
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fi
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# Find $remote_name from ls-remote output.
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head=$(
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IFS=' '
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echo "$ls_remote_result" |
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while read sha1 name
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do
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test "z$name" = "z$remote_name" || continue
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echo "$sha1"
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break
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done
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)
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expr "z$head" : "z$_x40\$" >/dev/null ||
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die "No such ref $remote_name at $remote"
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echo >&2 "Fetching $remote_name from $remote using $proto"
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git-http-fetch -v -a "$head" "$remote/" || exit
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;;
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rsync://*)
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test -n "$shallow_depth" &&
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die "shallow clone with rsync not supported"
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TMP_HEAD="$GIT_DIR/TMP_HEAD"
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rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
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head=$(git-rev-parse --verify TMP_HEAD)
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rm -f "$TMP_HEAD"
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test "$rsync_slurped_objects" || {
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rsync -av --ignore-existing --exclude info \
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"$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
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# Look at objects/info/alternates for rsync -- http will
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# support it natively and git native ones will do it on
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# the remote end. Not having that file is not a crime.
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rsync -q "$remote/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 "$GIT_DIR/TMP_ALT"
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then
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resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
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while read alt
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do
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case "$alt" in 'bad alternate: '*) die "$alt";; esac
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echo >&2 "Getting alternate: $alt"
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rsync -av --ignore-existing --exclude info \
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"$alt" "$GIT_OBJECT_DIRECTORY/" || exit
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done
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rm -f "$GIT_DIR/TMP_ALT"
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fi
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rsync_slurped_objects=t
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}
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;;
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*)
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# We will do git native transport with just one call later.
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continue ;;
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esac
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append_fetch_head "$head" "$remote" \
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"$remote_name" "$remote_nick" "$local_name" "$not_for_merge" || exit
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done
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case "$remote" in
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http://* | https://* | ftp://* | rsync://* )
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;; # we are already done.
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*)
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( : subshell because we muck with IFS
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IFS=" $LF"
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(
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git-fetch-pack --thin $exec $keep $shallow_depth "$remote" $rref ||
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echo failed "$remote"
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) |
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(
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trap '
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if test -n "$keepfile" && test -f "$keepfile"
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then
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rm -f "$keepfile"
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fi
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' 0
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keepfile=
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while read sha1 remote_name
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do
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case "$sha1" in
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failed)
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echo >&2 "Fetch failure: $remote"
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exit 1 ;;
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# special line coming from index-pack with the pack name
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pack)
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continue ;;
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keep)
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keepfile="$GIT_OBJECT_DIRECTORY/pack/pack-$remote_name.keep"
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continue ;;
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esac
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found=
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single_force=
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for ref in $refs
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do
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case "$ref" in
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+$remote_name:*)
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single_force=t
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not_for_merge=
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found="$ref"
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break ;;
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.+$remote_name:*)
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single_force=t
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not_for_merge=t
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found="$ref"
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break ;;
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.$remote_name:*)
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not_for_merge=t
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found="$ref"
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break ;;
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$remote_name:*)
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not_for_merge=
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found="$ref"
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break ;;
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esac
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done
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local_name=$(expr "z$found" : 'z[^:]*:\(.*\)')
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append_fetch_head "$sha1" "$remote" \
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"$remote_name" "$remote_nick" "$local_name" \
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"$not_for_merge" || exit
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done
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)
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) || exit ;;
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esac
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}
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fetch_main "$reflist" || exit
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# automated tag following
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case "$no_tags$tags" in
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'')
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case "$reflist" in
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*:refs/*)
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# effective only when we are following remote branch
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# using local tracking branch.
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taglist=$(IFS=' ' &&
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echo "$ls_remote_result" |
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git-show-ref --exclude-existing=refs/tags/ |
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while read sha1 name
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do
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git-cat-file -t "$sha1" >/dev/null 2>&1 || continue
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echo >&2 "Auto-following $name"
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echo ".${name}:${name}"
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done)
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esac
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case "$taglist" in
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'') ;;
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?*)
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# do not deepen a shallow tree when following tags
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shallow_depth=
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fetch_main "$taglist" || exit ;;
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esac
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esac
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# If the original head was empty (i.e. no "master" yet), or
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# if we were told not to worry, we do not have to check.
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case "$orig_head" in
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'')
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;;
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?*)
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curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
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if test "$curr_head" != "$orig_head"
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then
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git-update-ref \
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-m "$GIT_REFLOG_ACTION: Undoing incorrectly fetched HEAD." \
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HEAD "$orig_head"
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die "Cannot fetch into the current branch."
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fi
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;;
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esac
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