Code

close file on error in read_mmfile()
[git.git] / git-pull.sh
index 0f24182974fe2040c950b846decf360c1c22dbb1..9e69ada413bd81948591a9e99287f97499573673 100755 (executable)
@@ -16,7 +16,8 @@ cd_to_toplevel
 test -z "$(git ls-files -u)" ||
        die "You are in the middle of a conflicted merge."
 
-strategy_args= diffstat= no_commit= squash= no_ff= log_arg= verbosity=
+strategy_args= diffstat= no_commit= squash= no_ff= ff_only=
+log_arg= verbosity=
 curr_branch=$(git symbolic-ref -q HEAD)
 curr_branch_short=$(echo "$curr_branch" | sed "s|refs/heads/||")
 rebase=$(git config --bool branch.$curr_branch_short.rebase)
@@ -45,6 +46,8 @@ do
                no_ff=--ff ;;
        --no-ff)
                no_ff=--no-ff ;;
+       --ff-only)
+               ff_only=--ff-only ;;
        -s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\
                --strateg=*|--strategy=*|\
        -s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy)
@@ -88,42 +91,81 @@ error_on_no_merge_candidates () {
                esac
        done
 
-       curr_branch=${curr_branch#refs/heads/}
+       if test true = "$rebase"
+       then
+               op_type=rebase
+               op_prep=against
+       else
+               op_type=merge
+               op_prep=with
+       fi
 
-       if [ -z "$curr_branch" ]; then
+       curr_branch=${curr_branch#refs/heads/}
+       upstream=$(git config "branch.$curr_branch.merge")
+       remote=$(git config "branch.$curr_branch.remote")
+
+       if [ $# -gt 1 ]; then
+               if [ "$rebase" = true ]; then
+                       printf "There is no candidate for rebasing against "
+               else
+                       printf "There are no candidates for merging "
+               fi
+               echo "among 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 '$1', but did not specify"
+               echo "a branch. Because this is not the default configured remote"
+               echo "for your current branch, you must specify a branch on the command line."
+       elif [ -z "$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 "Please specify which remote branch you want to use 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"
-               echo "specify which branch you want to merge on the command line and"
+               echo "want to $op_type $op_prep, and 'branch.${curr_branch}.merge' in"
+               echo "your configuration file does not tell me, either. Please"
+               echo "specify which branch you want to use on the command line and"
                echo "try again (e.g. 'git pull <repository> <refspec>')."
                echo "See git-pull(1) for details."
                echo
-               echo "If you often merge with the same branch, you may want to"
-               echo "configure the following variables in your configuration"
-               echo "file:"
+               echo "If you often $op_type $op_prep the same branch, you may want to"
+               echo "use something like the following in your configuration file:"
+               echo
+               echo "    [branch \"${curr_branch}\"]"
+               echo "    remote = <nickname>"
+               echo "    merge = <remote-ref>"
+               test rebase = "$op_type" &&
+                       echo "    rebase = true"
                echo
-               echo "    branch.${curr_branch}.remote = <nickname>"
-               echo "    branch.${curr_branch}.merge = <remote-ref>"
-               echo "    remote.<nickname>.url = <url>"
-               echo "    remote.<nickname>.fetch = <refspec>"
+               echo "    [remote \"<nickname>\"]"
+               echo "    url = <url>"
+               echo "    fetch = <refspec>"
                echo
                echo "See git-config(1) for details."
+       else
+               echo "Your configuration specifies to $op_type $op_prep the ref '${upstream#refs/heads/}'"
+               echo "from the 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)" &&
@@ -150,7 +192,7 @@ 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 from"
+       echo >&2 "Warning: fast-forwarding your working tree from"
        echo >&2 "Warning: commit $orig_head."
        git update-index -q --refresh
        git read-tree -u -m "$orig_head" "$curr_head" ||
@@ -169,14 +211,7 @@ merge_head=$(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 "$orig_head"
@@ -201,5 +236,5 @@ merge_name=$(git fmt-merge-msg $log_arg <"$GIT_DIR/FETCH_HEAD") || exit
 test true = "$rebase" &&
        exec git-rebase $diffstat $strategy_args --onto $merge_head \
        ${oldremoteref:-$merge_head}
-exec git-merge $diffstat $no_commit $squash $no_ff $log_arg $strategy_args \
+exec git-merge $diffstat $no_commit $squash $no_ff $ff_only $log_arg $strategy_args \
        "$merge_name" HEAD $merge_head $verbosity