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d1014a1745
After a pull that results in a conflicted merge, a new user often tries another "git pull" in desperation. When the index is unmerged, merge backends correctly bail out without touching either index nor the working tree, so this does not make the wound any worse. The user will however see several lines of messsages during this process, such as "filename: needs merge", "you need to resolve your current index first", "Merging...", and "Entry ... would be overwritten by merge. Cannot merge.". They are unnecessarily alarming, and cause useful conflict messages from the first pull scroll off the top of the terminal. This changes pull and merge to run "git-ls-files -u" upfront and stop them much earlier than we currently do. Old timers may know better and would not to try pulling again before cleaning things up; this change adds extra overhead that is unnecessary for them. But this would be worth paying for to save new people from needless confusion. Signed-off-by: Junio C Hamano <junkio@cox.net>
108 lines
2.9 KiB
Bash
Executable file
108 lines
2.9 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-summary] [--no-commit] [-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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. git-sh-setup
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set_reflog_action "pull $*"
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test -z "$(git ls-files -u)" ||
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die "You are in a middle of conflicted merge."
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strategy_args= no_summary= no_commit= squash=
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while case "$#,$1" in 0) break ;; *,-*) ;; *) break ;; esac
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do
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case "$1" in
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-n|--n|--no|--no-|--no-s|--no-su|--no-sum|--no-summ|\
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--no-summa|--no-summar|--no-summary)
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no_summary=-n ;;
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--no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit)
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no_commit=--no-commit ;;
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--sq|--squ|--squa|--squas|--squash)
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squash=--squash ;;
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-s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\
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--strateg=*|--strategy=*|\
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-s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy)
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case "$#,$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 $strategy "
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;;
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-h|--h|--he|--hel|--help)
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usage
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;;
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-*)
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# Pass thru anything that is meant for fetch.
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break
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;;
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esac
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shift
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done
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orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
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git-fetch --update-head-ok "$@" || exit 1
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curr_head=$(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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# 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 $orig_head."
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git-update-index --refresh 2>/dev/null
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git-read-tree -u -m "$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 "$merge_head" in
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'')
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curr_branch=$(git-symbolic-ref HEAD | \
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sed -e 's|^refs/heads/||')
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echo >&2 "Warning: No merge candidate found because value of config option
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\"branch.${curr_branch}.merge\" does not match any remote branch fetched."
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echo >&2 "No changes."
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exit 0
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;;
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?*' '?*)
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if test -z "$orig_head"
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then
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echo >&2 "Cannot merge multiple branches into empty head"
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exit 1
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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 $merge_head "" &&
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git-read-tree --reset -u HEAD || exit 1
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exit
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fi
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merge_name=$(git-fmt-merge-msg <"$GIT_DIR/FETCH_HEAD") || exit
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exec git-merge $no_summary $no_commit $squash $strategy_args \
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"$merge_name" HEAD $merge_head
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