git am: Display some help text when patch is empty

diff --git a/git-filter-branch.sh b/git-filter-branch.sh
index cb9d2022cc93f1f371264098828a52e0d6bf1d7c..88fb0f070e5f32c62ae47f90f1f27ffeef836d8f 100755 (executable)
--- a/git-filter-branch.sh
+++ b/git-filter-branch.sh
@@ -207,7 +207,7 @@ t,)
 ,*)
        ;;
 *)
-       die "Cannot set --prune-empty and --filter-commit at the same time"
+       die "Cannot set --prune-empty and --commit-filter at the same time"
 esac
 
 case "$force" in
@@ -259,7 +259,6 @@ test -s "$tempdir"/heads ||
 
 GIT_INDEX_FILE="$(pwd)/../index"
 export GIT_INDEX_FILE
-git read-tree || die "Could not seed the index"
 
 # map old->new commit ids for rewriting parents
 mkdir ../map || die "Could not create map/ directory"
@@ -332,7 +331,7 @@ while read commit parents; do
                        die "tree filter failed: $filter_tree"
 
                (
-                       git diff-index -r --name-only $commit &&
+                       git diff-index -r --name-only --ignore-submodules $commit &&
                        git ls-files --others
                ) > "$tempdir"/tree-state || exit
                git update-index --add --replace --remove --stdin \
@@ -463,11 +462,11 @@ if [ "$filter_tag_name" ]; then
                                                "$new_sha1" "$new_ref"
                                git cat-file tag "$ref" |
                                sed -n \
-                                   -e "1,/^$/{
+                                   -e '1,/^$/{
                                          /^object /d
                                          /^type /d
                                          /^tag /d
-                                       }" \
+                                       }' \
                                    -e '/^-----BEGIN PGP SIGNATURE-----/q' \
                                    -e 'p' ) |
                                git mktag) ||