Merge branch 'mw/alternates'
[gitweb.git] / git-pull.sh
index e3d11961b0a5a7608648348153bde0ab6e7ccfff..4611ae644e08e4ab115633ab86f1f02976663169 100755 (executable)
@@ -4,12 +4,48 @@
 #
 # Fetch one or more remote refs and merge it/them into the current HEAD.
 
-. git-sh-setup || die "Not a git archive"
+USAGE='[-n | --no-summary] [--no-commit] [-s strategy]... [<fetch-options>] <repo> <head>...'
+LONG_USAGE='Fetch one or more remote refs and merge it/them into the current HEAD.'
+. git-sh-setup
 
-orig_head=$(cat "$GIT_DIR/HEAD") || die "Pulling into a black hole?"
+strategy_args= no_summary= no_commit=
+while case "$#,$1" in 0) break ;; *,-*) ;; *) break ;; esac
+do
+       case "$1" in
+       -n|--n|--no|--no-|--no-s|--no-su|--no-sum|--no-summ|\
+               --no-summa|--no-summar|--no-summary)
+               no_summary=-n ;;
+       --no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit)
+               no_commit=--no-commit ;;
+       -s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\
+               --strateg=*|--strategy=*|\
+       -s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy)
+               case "$#,$1" in
+               *,*=*)
+                       strategy=`expr "$1" : '-[^=]*=\(.*\)'` ;;
+               1,*)
+                       usage ;;
+               *)
+                       strategy="$2"
+                       shift ;;
+               esac
+               strategy_args="${strategy_args}-s $strategy "
+               ;;
+       -h|--h|--he|--hel|--help)
+               usage
+               ;;
+       -*)
+               # Pass thru anything that is meant for fetch.
+               break
+               ;;
+       esac
+       shift
+done
+
+orig_head=$(git-rev-parse --verify HEAD) || die "Pulling into a black hole?"
 git-fetch --update-head-ok "$@" || exit 1
 
-curr_head=$(cat "$GIT_DIR/HEAD")
+curr_head=$(git-rev-parse --verify HEAD)
 if test "$curr_head" != "$orig_head"
 then
        # The fetch involved updating the current branch.
@@ -19,23 +55,49 @@ then
        # First update the working tree to match $curr_head.
 
        echo >&2 "Warning: fetch updated the current branch head."
-       echo >&2 "Warning: fast forwarding your working tree."
+       echo >&2 "Warning: fast forwarding your working tree from"
+       echo >&2 "Warning: $orig_head commit."
+       git-update-index --refresh 2>/dev/null
        git-read-tree -u -m "$orig_head" "$curr_head" ||
-               die "You need to first update your working tree."
+               die 'Cannot fast-forward your working tree.
+After making sure that you saved anything precious from
+$ git diff '$orig_head'
+output, run
+$ git reset --hard
+to recover.'
+
 fi
 
-merge_head=$(sed -e 's/        .*//' "$GIT_DIR"/FETCH_HEAD | tr '\012' ' ')
+merge_head=$(sed -e '/ not-for-merge   /d' \
+       -e 's/  .*//' "$GIT_DIR"/FETCH_HEAD | \
+       tr '\012' ' ')
 
 case "$merge_head" in
 '')
        echo >&2 "No changes."
        exit 0
        ;;
-*' '?*)
-       echo >&2 "Pulling more than one heads; making an Octopus."
-       exec git-octopus
+?*' '?*)
+       var=`git-repo-config --get pull.octopus`
+       if test -n "$var"
+       then
+               strategy_default_args="-s $var"
+       fi
+       ;;
+*)
+       var=`git-repo-config --get pull.twohead`
+       if test -n "$var"
+        then
+               strategy_default_args="-s $var"
+       fi
+       ;;
+esac
+
+case "$strategy_args" in
+'')
+       strategy_args=$strategy_default_args
        ;;
 esac
 
 merge_name=$(git-fmt-merge-msg <"$GIT_DIR/FETCH_HEAD")
-git-resolve "$(cat "$GIT_DIR"/HEAD)" $merge_head "$merge_name"
+git-merge $no_summary $no_commit $strategy_args "$merge_name" HEAD $merge_head