Merge branch 'maint'

diff --git a/git-am.sh b/git-am.sh
index 1e40ce92e62cc0972cc60ed7f06dff07ec37a9a3..578780be138b216dc89333e1fde87ddcb91e5e54 100755 (executable)
--- a/git-am.sh
+++ b/git-am.sh
@@ -8,9 +8,8 @@ OPTIONS_SPEC="\
 git am [options] [<mbox>|<Maildir>...]
 git am [options] (--resolved | --skip | --abort)
 --
-d,dotest=       (removed -- do not use)
 i,interactive   run interactively
-b,binary        (historical option -- no-op)
+b,binary*       (historical option -- no-op)
 3,3way          allow fall back on 3way merging if needed
 s,signoff       add a Signed-off-by line to the commit message
 u,utf8          recode into utf8 (default)
@@ -26,7 +25,7 @@ skip            skip the current patch
 abort           restore the original branch and abort the patching operation.
 committer-date-is-author-date    lie about committer date
 ignore-date     use current timestamp for author date
-rebasing        (internal use for git-rebase)"
+rebasing*       (internal use for git-rebase)"
 
 . git-sh-setup
 prefix=$(git rev-parse --show-prefix)
@@ -37,12 +36,15 @@ cd_to_toplevel
 git var GIT_COMMITTER_IDENT >/dev/null ||
        die "You need to set your committer info first"
 
+if git rev-parse --verify -q HEAD >/dev/null
+then
+       HAS_HEAD=yes
+else
+       HAS_HEAD=
+fi
+
 sq () {
-       for sqarg
-       do
-               printf "%s" "$sqarg" |
-               sed -e 's/'\''/'\''\\'\'''\''/g' -e 's/.*/ '\''&'\''/'
-       done
+       git rev-parse --sq-quote "$@"
 }
 
 stop_here () {
@@ -212,7 +214,7 @@ then
                # unreliable -- stdin could be /dev/null for example
                # and the caller did not intend to feed us a patch but
                # wanted to continue unattended.
-               tty -s
+               test -t 0
                ;;
        *)
                false
@@ -222,6 +224,9 @@ then
        resume=yes
 
        case "$skip,$abort" in
+       t,t)
+               die "Please make up your mind. --skip or --abort?"
+               ;;
        t,)
                git rerere clear
                git read-tree --reset -u HEAD HEAD
@@ -230,12 +235,19 @@ then
                git update-ref ORIG_HEAD $orig_head
                ;;
        ,t)
+               if test -f "$dotest/rebasing"
+               then
+                       exec git rebase --abort
+               fi
                git rerere clear
-               git read-tree --reset -u HEAD ORIG_HEAD
-               git reset ORIG_HEAD
+               test -f "$dotest/dirtyindex" || {
+                       git read-tree --reset -u HEAD ORIG_HEAD
+                       git reset ORIG_HEAD
+               }
                rm -fr "$dotest"
                exit ;;
        esac
+       rm -f "$dotest/dirtyindex"
 else
        # Make sure we are not given --skip, --resolved, nor --abort
        test "$skip$resolved$abort" = "" ||
@@ -281,16 +293,27 @@ else
                : >"$dotest/rebasing"
        else
                : >"$dotest/applying"
-               git update-ref ORIG_HEAD HEAD
+               if test -n "$HAS_HEAD"
+               then
+                       git update-ref ORIG_HEAD HEAD
+               else
+                       git update-ref -d ORIG_HEAD >/dev/null 2>&1
+               fi
        fi
 fi
 
 case "$resolved" in
 '')
-       files=$(git diff-index --cached --name-only HEAD --) || exit
-       if [ "$files" ]; then
-          echo "Dirty index: cannot apply patches (dirty: $files)" >&2
-          exit 1
+       case "$HAS_HEAD" in
+       '')
+               files=$(git ls-files) ;;
+       ?*)
+               files=$(git diff-index --cached --name-only HEAD --) ;;
+       esac || exit
+       if test "$files"
+       then
+               test -n "$HAS_HEAD" && : >"$dotest/dirtyindex"
+               die "Dirty index: cannot apply patches (dirty: $files)"
        fi
 esac
 
@@ -531,18 +554,20 @@ do
        fi
 
        tree=$(git write-tree) &&
-       parent=$(git rev-parse --verify HEAD) &&
        commit=$(
                if test -n "$ignore_date"
                then
                        GIT_AUTHOR_DATE=
                fi
+               parent=$(git rev-parse --verify -q HEAD) ||
+               echo >&2 "applying to an empty history"
+
                if test -n "$committer_date_is_author_date"
                then
                        GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"
                        export GIT_COMMITTER_DATE
                fi &&
-               git commit-tree $tree -p $parent <"$dotest/final-commit"
+               git commit-tree $tree ${parent:+-p} $parent <"$dotest/final-commit"
        ) &&
        git update-ref -m "$GIT_REFLOG_ACTION: $FIRSTLINE" HEAD $commit $parent ||
        stop_here $this