git: add --no-replace-objects option to disable replacing

diff --git a/git-pull.sh b/git-pull.sh
index 0f24182974fe2040c950b846decf360c1c22dbb1..fc78592ae04283db2af633ec080f99c6404ceda7 100755 (executable)
--- a/git-pull.sh
+++ b/git-pull.sh
@@ -89,14 +89,24 @@ error_on_no_merge_candidates () {
        done
 
        curr_branch=${curr_branch#refs/heads/}
-
-       if [ -z "$curr_branch" ]; then
+       upstream=$(git config "branch.$curr_branch.merge")
+       remote=$(git config "branch.$curr_branch.remote")
+
+       if [ $# -gt 1 ]; then
+               echo "There are no candidates for merging in the refs that you just fetched."
+               echo "Generally this means that you provided a wildcard refspec which had no"
+               echo "matches on the remote end."
+       elif [ $# -gt 0 ] && [ "$1" != "$remote" ]; then
+               echo "You asked to pull from the remote '$1', but did not specify"
+               echo "a branch to merge. Because this is not the default configured remote"
+               echo "for your current branch, you must specify a branch on the command line."
+       elif [ -z "$curr_branch" ]; then
                echo "You are not currently on a branch, so I cannot use any"
                echo "'branch.<branchname>.merge' in your configuration file."
                echo "Please specify which branch you want to merge on the command"
                echo "line and try again (e.g. 'git pull <repository> <refspec>')."
                echo "See git-pull(1) for details."
-       else
+       elif [ -z "$upstream" ]; then
                echo "You asked me to pull without telling me which branch you"
                echo "want to merge with, and 'branch.${curr_branch}.merge' in"
                echo "your configuration file does not tell me either.  Please"
@@ -114,16 +124,27 @@ error_on_no_merge_candidates () {
                echo "    remote.<nickname>.fetch = <refspec>"
                echo
                echo "See git-config(1) for details."
+       else
+               echo "Your configuration specifies to merge the ref '${upstream#refs/heads/}' from the"
+               echo "remote, but no such ref was fetched."
        fi
        exit 1
 }
 
 test true = "$rebase" && {
-       git update-index --ignore-submodules --refresh &&
-       git diff-files --ignore-submodules --quiet &&
-       git diff-index --ignore-submodules --cached --quiet HEAD -- ||
-       die "refusing to pull with rebase: your working tree is not up-to-date"
-
+       if ! git rev-parse -q --verify HEAD >/dev/null
+       then
+               # On an unborn branch
+               if test -f "$GIT_DIR/index"
+               then
+                       die "updating an unborn branch with changes added to the index"
+               fi
+       else
+               git update-index --ignore-submodules --refresh &&
+               git diff-files --ignore-submodules --quiet &&
+               git diff-index --ignore-submodules --cached --quiet HEAD -- ||
+               die "refusing to pull with rebase: your working tree is not up-to-date"
+       fi
        oldremoteref= &&
        . git-parse-remote &&
        remoteref="$(get_remote_merge_branch "$@" 2>/dev/null)" &&
@@ -169,14 +190,7 @@ merge_head=$(sed -e '/     not-for-merge   /d' \
 
 case "$merge_head" in
 '')
-       case $? in
-       0) error_on_no_merge_candidates "$@";;
-       1) echo >&2 "You are not currently on a branch; you must explicitly"
-          echo >&2 "specify which branch you wish to merge:"
-          echo >&2 "  git pull <remote> <branch>"
-          exit 1;;
-       *) exit $?;;
-       esac
+       error_on_no_merge_candidates "$@"
        ;;
 ?*' '?*)
        if test -z "$orig_head"