Do linear-time/space rename logic for exact renames

diff --git a/git-pull.sh b/git-pull.sh
index ba0ca079e204a464ee05b6c000ed891ed3c08b33..74bfc16744d69d8394f89b6f77d81697a8336032 100755 (executable)
--- a/git-pull.sh
+++ b/git-pull.sh
@@ -16,7 +16,7 @@ test -z "$(git ls-files -u)" ||
        die "You are in the middle of a conflicted merge."
 
 strategy_args= no_summary= no_commit= squash=
-while case "$#,$1" in 0) break ;; *,-*) ;; *) break ;; esac
+while :
 do
        case "$1" in
        -n|--n|--no|--no-|--no-s|--no-su|--no-sum|--no-summ|\
@@ -46,18 +46,18 @@ do
        -h|--h|--he|--hel|--help)
                usage
                ;;
-       -*)
-               # Pass thru anything that is meant for fetch.
+       *)
+               # Pass thru anything that may be meant for fetch.
                break
                ;;
        esac
        shift
 done
 
-orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
+orig_head=$(git rev-parse --verify HEAD 2>/dev/null)
 git-fetch --update-head-ok "$@" || exit 1
 
-curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
+curr_head=$(git rev-parse --verify HEAD 2>/dev/null)
 if test "$curr_head" != "$orig_head"
 then
        # The fetch involved updating the current branch.
@@ -69,8 +69,8 @@ then
        echo >&2 "Warning: fetch updated the current branch head."
        echo >&2 "Warning: fast forwarding your working tree from"
        echo >&2 "Warning: commit $orig_head."
-       git-update-index --refresh 2>/dev/null
-       git-read-tree -u -m "$orig_head" "$curr_head" ||
+       git update-index --refresh 2>/dev/null
+       git read-tree -u -m "$orig_head" "$curr_head" ||
                die 'Cannot fast-forward your working tree.
 After making sure that you saved anything precious from
 $ git diff '$orig_head'
@@ -86,7 +86,7 @@ merge_head=$(sed -e '/        not-for-merge   /d' \
 
 case "$merge_head" in
 '')
-       curr_branch=$(git-symbolic-ref -q HEAD)
+       curr_branch=$(git symbolic-ref -q HEAD)
        case $? in
          0) ;;
          1) echo >&2 "You are not currently on a branch; you must explicitly"
@@ -97,10 +97,24 @@ case "$merge_head" in
        esac
        curr_branch=${curr_branch#refs/heads/}
 
-       echo >&2 "Warning: No merge candidate found because value of config option
-         \"branch.${curr_branch}.merge\" does not match any remote branch fetched."
-       echo >&2 "No changes."
-       exit 0
+       echo >&2 "You asked me to pull without telling me which branch you"
+       echo >&2 "want to merge with, and 'branch.${curr_branch}.merge' in"
+       echo >&2 "your configuration file does not tell me either.  Please"
+       echo >&2 "name which branch you want to merge on the command line and"
+       echo >&2 "try again (e.g. 'git pull <repository> <refspec>')."
+       echo >&2 "See git-pull(1) for details on the refspec."
+       echo >&2
+       echo >&2 "If you often merge with the same branch, you may want to"
+       echo >&2 "configure the following variables in your configuration"
+       echo >&2 "file:"
+       echo >&2
+       echo >&2 "    branch.${curr_branch}.remote = <nickname>"
+       echo >&2 "    branch.${curr_branch}.merge = <remote-ref>"
+       echo >&2 "    remote.<nickname>.url = <url>"
+       echo >&2 "    remote.<nickname>.fetch = <refspec>"
+       echo >&2
+       echo >&2 "See git-config(1) for details."
+       exit 1
        ;;
 ?*' '?*)
        if test -z "$orig_head"
@@ -113,11 +127,11 @@ esac
 
 if test -z "$orig_head"
 then
-       git-update-ref -m "initial pull" HEAD $merge_head "" &&
-       git-read-tree --reset -u HEAD || exit 1
+       git update-ref -m "initial pull" HEAD $merge_head "" &&
+       git read-tree --reset -u HEAD || exit 1
        exit
 fi
 
-merge_name=$(git-fmt-merge-msg <"$GIT_DIR/FETCH_HEAD") || exit
+merge_name=$(git fmt-merge-msg <"$GIT_DIR/FETCH_HEAD") || exit
 exec git-merge $no_summary $no_commit $squash $strategy_args \
        "$merge_name" HEAD $merge_head