autodetect number of CPUs by default when using threads

diff --git a/git-rebase.sh b/git-rebase.sh
index 528b604cd57a774030c5f5830d3d78b5a04454cf..ebd4df3a0e821ddcfd1eabfcaac17f854e172a85 100755 (executable)
--- a/git-rebase.sh
+++ b/git-rebase.sh
@@ -34,6 +34,7 @@ set_reflog_action rebase
 require_work_tree
 cd_to_toplevel
 
+OK_TO_SKIP_PRE_REBASE=
 RESOLVEMSG="
 When you have resolved this problem run \"git rebase --continue\".
 If you would prefer to skip this patch, instead run \"git rebase --skip\".
@@ -138,10 +139,37 @@ finish_rb_merge () {
 }
 
 is_interactive () {
-       test -f "$dotest"/interactive ||
-       while :; do case $#,"$1" in 0,|*,-i|*,--interactive) break ;; esac
+       while test $# != 0
+       do
+               case "$1" in
+                       -i|--interactive)
+                               interactive_rebase=explicit
+                               break
+                       ;;
+                       -p|--preserve-merges)
+                               interactive_rebase=implied
+                       ;;
+               esac
                shift
-       done && test -n "$1"
+       done
+
+       if [ "$interactive_rebase" = implied ]; then
+               GIT_EDITOR=:
+               export GIT_EDITOR
+       fi
+
+       test -n "$interactive_rebase" || test -f "$dotest"/interactive
+}
+
+run_pre_rebase_hook () {
+       if test -z "$OK_TO_SKIP_PRE_REBASE" &&
+          test -x "$GIT_DIR/hooks/pre-rebase"
+       then
+               "$GIT_DIR/hooks/pre-rebase" ${1+"$@"} || {
+                       echo >&2 "The pre-rebase hook refused to rebase."
+                       exit 1
+               }
+       fi
 }
 
 test -f "$GIT_DIR"/rebase-apply/applying &&
@@ -160,6 +188,9 @@ fi
 while test $# != 0
 do
        case "$1" in
+       --no-verify)
+               OK_TO_SKIP_PRE_REBASE=yes
+               ;;
        --continue)
                test -d "$dotest" -o -d "$GIT_DIR"/rebase-apply ||
                        die "No rebase in progress?"
@@ -301,11 +332,14 @@ else
 fi
 
 # The tree must be really really clean.
-git update-index --ignore-submodules --refresh || exit
+if ! git update-index --ignore-submodules --refresh; then
+       echo >&2 "cannot rebase: you have unstaged changes"
+       exit 1
+fi
 diff=$(git diff-index --cached --name-status -r --ignore-submodules HEAD --)
 case "$diff" in
-?*)    echo "cannot rebase: your index is not up-to-date"
-       echo "$diff"
+?*)    echo >&2 "cannot rebase: your index contains uncommitted changes"
+       echo >&2 "$diff"
        exit 1
        ;;
 esac
@@ -320,13 +354,7 @@ onto_name=${newbase-"$upstream_name"}
 onto=$(git rev-parse --verify "${onto_name}^0") || exit
 
 # If a hook exists, give it a chance to interrupt
-if test -x "$GIT_DIR/hooks/pre-rebase"
-then
-       "$GIT_DIR/hooks/pre-rebase" ${1+"$@"} || {
-               echo >&2 "The pre-rebase hook refused to rebase."
-               exit 1
-       }
-fi
+run_pre_rebase_hook ${1+"$@"}
 
 # If the branch to rebase is given, that is the branch we will rebase
 # $branch_name -- branch being rebased, or HEAD (already detached)
@@ -340,10 +368,10 @@ case "$#" in
        switch_to="$2"
 
        if git show-ref --verify --quiet -- "refs/heads/$2" &&
-          branch=$(git rev-parse --verify "refs/heads/$2" 2>/dev/null)
+          branch=$(git rev-parse -q --verify "refs/heads/$2")
        then
                head_name="refs/heads/$2"
-       elif branch=$(git rev-parse --verify "$2" 2>/dev/null)
+       elif branch=$(git rev-parse -q --verify "$2")
        then
                head_name="detached HEAD"
        else