mirror of
https://github.com/git/git.git
synced 2024-12-03 23:14:23 +08:00
449 lines
10 KiB
Bash
Executable File
449 lines
10 KiB
Bash
Executable File
#!/bin/sh
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#
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USAGE='<fetch-options> <repository> <refspec>...'
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. git-sh-setup
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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="$LF"
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rloga=fetch
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no_tags=
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tags=
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append=
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force=
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verbose=
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update_head_ok=
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exec=
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upload_pack=
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keep=--thin
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while case "$#" 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=--keep
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;;
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--reflog-action=*)
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rloga=`expr "z$1" : 'z-[^=]*=\(.*\)'`
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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 "$#" in
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0)
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test -f "$GIT_DIR/branches/origin" ||
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test -f "$GIT_DIR/remotes/origin" ||
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git-repo-config --get remote.origin.url >/dev/null ||
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die "Where do you want to fetch from today?"
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set origin ;;
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esac
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remote_nick="$1"
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remote=$(get_remote_url "$@")
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refs=
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rref=
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rsync_slurped_objects=
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rloga="$rloga $remote_nick"
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test "$remote_nick" = "$remote" || rloga="$rloga $remote"
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if test "" = "$append"
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then
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: >"$GIT_DIR/FETCH_HEAD"
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fi
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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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[ "$verbose" ] && echo >&2 "* committish: $head_"
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[ "$verbose" ] && echo >&2 " $note_"
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else
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echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
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[ "$verbose" ] && echo >&2 "* non-commit: $head_"
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[ "$verbose" ] && echo >&2 " $note_"
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fi
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if test "$local_name_" != ""
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then
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# 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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fast_forward_local "$local_name_" "$head_" "$note_"
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fi
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}
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fast_forward_local () {
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mkdir -p "$(dirname "$GIT_DIR/$1")"
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case "$1" in
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refs/tags/*)
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# Tags need not be pointing at commits so there
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# is no way to guarantee "fast-forward" anyway.
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if test -f "$GIT_DIR/$1"
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then
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if now_=$(cat "$GIT_DIR/$1") && test "$now_" = "$2"
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then
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[ "$verbose" ] && echo >&2 "* $1: same as $3" ||:
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else
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echo >&2 "* $1: updating with $3"
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git-update-ref -m "$rloga: updating tag" "$1" "$2"
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fi
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else
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echo >&2 "* $1: storing $3"
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git-update-ref -m "$rloga: 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 $3"
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fi
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;;
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*,$local)
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echo >&2 "* $1: fast forward to $3"
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echo >&2 " from $local to $2"
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git-update-ref -m "$rloga: 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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echo >&2 "* $1: does not fast forward to $3;"
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case ",$force,$single_force," in
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*,t,*)
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echo >&2 " forcing update."
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git-update-ref -m "$rloga: forced-update" "$1" "$2" "$local"
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;;
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*)
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echo >&2 " not updating."
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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 $3"
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git-update-ref -m "$rloga: 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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(
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git-ls-remote $upload_pack --tags "$remote" ||
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echo fail ouch
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) |
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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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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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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://*)
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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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max_depth=5
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depth=0
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head="ref: $remote_name"
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while (expr "z$head" : "zref:" && expr $depth \< $max_depth) >/dev/null
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do
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remote_name_quoted=$(@@PERL@@ -e '
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my $u = $ARGV[0];
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$u =~ s/^ref:\s*//;
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$u =~ s{([^-a-zA-Z0-9/.])}{sprintf"%%%02x",ord($1)}eg;
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print "$u";
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' "$head")
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head=$(curl -nsfL $curl_extra_args "$remote/$remote_name_quoted")
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depth=$( expr \( $depth + 1 \) )
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done
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expr "z$head" : "z$_x40\$" >/dev/null ||
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die "Failed to fetch $remote_name from $remote"
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echo >&2 Fetching "$remote_name from $remote" using http
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git-http-fetch -v -a "$head" "$remote/" || exit
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;;
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rsync://*)
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TMP_HEAD="$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"
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done
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case "$remote" in
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http://* | https://* | 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 $exec $keep "$remote" $rref || echo failed "$remote"
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) |
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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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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" "$local_name" "$not_for_merge"
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done
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) || exit ;;
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esac
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}
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fetch_main "$reflist"
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# automated tag following
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case "$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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git-ls-remote $upload_pack --tags "$remote" |
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sed -ne 's|^\([0-9a-f]*\)[ ]\(refs/tags/.*\)^{}$|\1 \2|p' |
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while read sha1 name
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do
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test -f "$GIT_DIR/$name" && continue
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git-check-ref-format "$name" || {
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echo >&2 "warning: tag ${name} ignored"
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continue
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}
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git-cat-file -t "$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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fetch_main "$taglist" ;;
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esac
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esac
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# If the original head was empty (i.e. no "master" yet), or
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# if we were told not to worry, we do not have to check.
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case ",$update_head_ok,$orig_head," in
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*,, | t,* )
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;;
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*)
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curr_head=$(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 "$rloga: Undoing incorrectly fetched HEAD." \
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HEAD "$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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