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d44e71261f
You cannot do a "git pull --rebase" with a rebased upstream, if you have already run "git fetch". Try to behave as if the "git fetch" was not run. In other words, find the fork point of the current branch, where the tip of upstream branch used to be, and use it as the upstream parameter of "git rebase". This patch computes the fork point by walking the reflog to find the first commit which is an ancestor of the current branch. Maybe there are smarter ways to compute it, but this is a straight forward implementation. Signed-off-by: Santi Béjar <santi@agolina.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
206 lines
5.7 KiB
Bash
Executable file
206 lines
5.7 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2005 Junio C Hamano
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#
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# Fetch one or more remote refs and merge it/them into the current HEAD.
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USAGE='[-n | --no-stat] [--[no-]commit] [--[no-]squash] [--[no-]ff] [-s strategy]... [<fetch-options>] <repo> <head>...'
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LONG_USAGE='Fetch one or more remote refs and merge it/them into the current HEAD.'
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SUBDIRECTORY_OK=Yes
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OPTIONS_SPEC=
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. git-sh-setup
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set_reflog_action "pull $*"
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require_work_tree
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cd_to_toplevel
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test -z "$(git ls-files -u)" ||
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die "You are in the middle of a conflicted merge."
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strategy_args= diffstat= no_commit= squash= no_ff= log_arg= verbosity=
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curr_branch=$(git symbolic-ref -q HEAD)
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curr_branch_short=$(echo "$curr_branch" | sed "s|refs/heads/||")
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rebase=$(git config --bool branch.$curr_branch_short.rebase)
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while :
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do
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case "$1" in
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-q|--quiet)
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verbosity="$verbosity -q" ;;
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-v|--verbose)
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verbosity="$verbosity -v" ;;
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-n|--no-stat|--no-summary)
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diffstat=--no-stat ;;
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--stat|--summary)
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diffstat=--stat ;;
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--log|--no-log)
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log_arg=$1 ;;
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--no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit)
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no_commit=--no-commit ;;
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--c|--co|--com|--comm|--commi|--commit)
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no_commit=--commit ;;
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--sq|--squ|--squa|--squas|--squash)
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squash=--squash ;;
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--no-sq|--no-squ|--no-squa|--no-squas|--no-squash)
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squash=--no-squash ;;
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--ff)
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no_ff=--ff ;;
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--no-ff)
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no_ff=--no-ff ;;
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-s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\
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--strateg=*|--strategy=*|\
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-s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy)
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case "$#,$1" in
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*,*=*)
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strategy=`expr "z$1" : 'z-[^=]*=\(.*\)'` ;;
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1,*)
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usage ;;
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*)
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strategy="$2"
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shift ;;
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esac
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strategy_args="${strategy_args}-s $strategy "
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;;
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-r|--r|--re|--reb|--reba|--rebas|--rebase)
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rebase=true
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;;
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--no-r|--no-re|--no-reb|--no-reba|--no-rebas|--no-rebase)
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rebase=false
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;;
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-h|--h|--he|--hel|--help)
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usage
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;;
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*)
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# Pass thru anything that may be meant for fetch.
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break
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;;
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esac
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shift
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done
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error_on_no_merge_candidates () {
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exec >&2
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for opt
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do
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case "$opt" in
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-t|--t|--ta|--tag|--tags)
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echo "Fetching tags only, you probably meant:"
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echo " git fetch --tags"
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exit 1
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esac
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done
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curr_branch=${curr_branch#refs/heads/}
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if [ -z "$curr_branch" ]; then
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echo "You are not currently on a branch, so I cannot use any"
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echo "'branch.<branchname>.merge' in your configuration file."
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echo "Please specify which branch you want to merge on the command"
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echo "line and try again (e.g. 'git pull <repository> <refspec>')."
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echo "See git-pull(1) for details."
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else
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echo "You asked me to pull without telling me which branch you"
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echo "want to merge with, and 'branch.${curr_branch}.merge' in"
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echo "your configuration file does not tell me either. Please"
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echo "specify which branch you want to merge on the command line and"
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echo "try again (e.g. 'git pull <repository> <refspec>')."
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echo "See git-pull(1) for details."
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echo
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echo "If you often merge with the same branch, you may want to"
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echo "configure the following variables in your configuration"
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echo "file:"
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echo
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echo " branch.${curr_branch}.remote = <nickname>"
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echo " branch.${curr_branch}.merge = <remote-ref>"
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echo " remote.<nickname>.url = <url>"
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echo " remote.<nickname>.fetch = <refspec>"
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echo
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echo "See git-config(1) for details."
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fi
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exit 1
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}
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test true = "$rebase" && {
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git update-index --ignore-submodules --refresh &&
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git diff-files --ignore-submodules --quiet &&
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git diff-index --ignore-submodules --cached --quiet HEAD -- ||
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die "refusing to pull with rebase: your working tree is not up-to-date"
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oldremoteref= &&
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. git-parse-remote &&
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remoteref="$(get_remote_merge_branch "$@" 2>/dev/null)" &&
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oldremoteref="$(git rev-parse -q --verify "$remoteref")" &&
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for reflog in $(git rev-list -g $remoteref 2>/dev/null)
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do
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if test "$reflog" = "$(git merge-base $reflog $curr_branch)"
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then
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oldremoteref="$reflog"
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break
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fi
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done
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}
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orig_head=$(git rev-parse -q --verify HEAD)
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git fetch $verbosity --update-head-ok "$@" || exit 1
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curr_head=$(git rev-parse -q --verify HEAD)
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if test -n "$orig_head" && test "$curr_head" != "$orig_head"
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then
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# The fetch involved updating the current branch.
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# The working tree and the index file is still based on the
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# $orig_head commit, but we are merging into $curr_head.
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# First update the working tree to match $curr_head.
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echo >&2 "Warning: fetch updated the current branch head."
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echo >&2 "Warning: fast forwarding your working tree from"
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echo >&2 "Warning: commit $orig_head."
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git update-index -q --refresh
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git read-tree -u -m "$orig_head" "$curr_head" ||
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die 'Cannot fast-forward your working tree.
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After making sure that you saved anything precious from
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$ git diff '$orig_head'
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output, run
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$ git reset --hard
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to recover.'
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fi
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merge_head=$(sed -e '/ not-for-merge /d' \
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-e 's/ .*//' "$GIT_DIR"/FETCH_HEAD | \
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tr '\012' ' ')
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case "$merge_head" in
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'')
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case $? in
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0) error_on_no_merge_candidates "$@";;
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1) echo >&2 "You are not currently on a branch; you must explicitly"
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echo >&2 "specify which branch you wish to merge:"
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echo >&2 " git pull <remote> <branch>"
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exit 1;;
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*) exit $?;;
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esac
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;;
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?*' '?*)
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if test -z "$orig_head"
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then
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die "Cannot merge multiple branches into empty head"
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fi
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if test true = "$rebase"
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then
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die "Cannot rebase onto multiple branches"
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fi
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;;
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esac
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if test -z "$orig_head"
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then
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git update-ref -m "initial pull" HEAD $merge_head "$curr_head" &&
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git read-tree --reset -u HEAD || exit 1
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exit
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fi
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merge_name=$(git fmt-merge-msg $log_arg <"$GIT_DIR/FETCH_HEAD") || exit
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test true = "$rebase" &&
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exec git-rebase $diffstat $strategy_args --onto $merge_head \
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${oldremoteref:-$merge_head}
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exec git-merge $diffstat $no_commit $squash $no_ff $log_arg $strategy_args \
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"$merge_name" HEAD $merge_head $verbosity
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