kbuild: use git-archive for source package creation

Commit 5c3d1d0abb12 ("kbuild: add a tool to list files ignored by git")
added a new tool, scripts/list-gitignored. My intention was to create
source packages without cleaning the source tree, without relying on git.

Linus strongly objected to it, and suggested using 'git archive' instead.
[1] [2] [3]

This commit goes in that direction - Remove scripts/list-gitignored.c
and rewrites Makefiles and scripts to use 'git archive' for building
Debian and RPM source packages. It also makes 'make perf-tar*-src-pkg'
use 'git archive' again.

Going forward, building source packages is only possible in a git-managed
tree. Building binary packages does not require git.

[1]: https://lore.kernel.org/lkml/CAHk-=wi49sMaC7vY1yMagk7eqLK=1jHeHQ=yZ_k45P=xBccnmA@mail.gmail.com/
[2]: https://lore.kernel.org/lkml/CAHk-=wh5AixGsLeT0qH2oZHKq0FLUTbyTw4qY921L=PwYgoGVw@mail.gmail.com/
[3]: https://lore.kernel.org/lkml/CAHk-=wgM-W6Fu==EoAVCabxyX8eYBz9kNC88-tm9ExRQwA79UQ@mail.gmail.com/

Fixes: 5c3d1d0abb12 ("kbuild: add a tool to list files ignored by git")
Fixes: e0ca16749ac3 ("kbuild: make perf-tar*-src-pkg work without relying on git")
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

10 files changed, 181 insertions, 1155 deletions

diff --git a/Makefile b/Makefile
index dfff9f8d28e5..0de1288dc451 100644
--- a/Makefile
+++ b/Makefile
@@ -274,8 +274,7 @@ no-dot-config-targets := $(clean-targets) \
 			 cscope gtags TAGS tags help% %docs check% coccicheck \
 			 $(version_h) headers headers_% archheaders archscripts \
 			 %asm-generic kernelversion %src-pkg dt_binding_check \
-			 outputmakefile rustavailable rustfmt rustfmtcheck \
-			 scripts_package
+			 outputmakefile rustavailable rustfmt rustfmtcheck
 # Installation targets should not require compiler. Unfortunately, vdso_install
 # is an exception where build artifacts may be updated. This must be fixed.
 no-compiler-targets := $(no-dot-config-targets) install dtbs_install \
@@ -1656,10 +1655,6 @@ distclean: mrproper
 %pkg: include/config/kernel.release FORCE
 	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
 
-PHONY += scripts_package
-scripts_package: scripts_basic
-	$(Q)$(MAKE) $(build)=scripts scripts/list-gitignored
-
 # Brief documentation of the typical targets used
 # ---------------------------------------------------------------------------
 
diff --git a/scripts/.gitignore b/scripts/.gitignore
index feb43045d1b1..6e9ce6720a05 100644
--- a/scripts/.gitignore
+++ b/scripts/.gitignore
@@ -3,7 +3,6 @@
 /generate_rust_target
 /insert-sys-cert
 /kallsyms
-/list-gitignored
 /module.lds
 /recordmcount
 /sign-file
diff --git a/scripts/Makefile b/scripts/Makefile
index e8917975905c..32b6ba722728 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -38,7 +38,7 @@ HOSTCFLAGS_sorttable.o += -DMCOUNT_SORT_ENABLED
 endif
 
 # The following programs are only built on demand
-hostprogs += list-gitignored unifdef
+hostprogs += unifdef
 
 # The module linker script is preprocessed on demand
 targets += module.lds
diff --git a/scripts/Makefile.package b/scripts/Makefile.package
index a0355bdeebff..61f72eb8d9be 100644
--- a/scripts/Makefile.package
+++ b/scripts/Makefile.package
@@ -2,6 +2,7 @@
 # Makefile for the different targets used to generate full packages of a kernel
 
 include $(srctree)/scripts/Kbuild.include
+include $(srctree)/scripts/Makefile.lib
 
 KERNELPATH := kernel-$(subst -,_,$(KERNELRELEASE))
 KBUILD_PKG_ROOTCMD ?="fakeroot -u"
@@ -26,54 +27,46 @@ fi ; \
 tar -I $(KGZIP) -c $(RCS_TAR_IGNORE) -f $(2).tar.gz \
 	--transform 's:^:$(2)/:S' $(TAR_CONTENT) $(3)
 
-# .tmp_filelist .tmp_filelist_exclude
+# tarball compression
 # ---------------------------------------------------------------------------
 
-scripts/list-gitignored: FORCE
-	$(Q)$(MAKE) -f $(srctree)/Makefile scripts_package
+%.tar.gz: %.tar
+	$(call cmd,gzip)
 
-# 1f5d3a6b6532e25a5cdf1f311956b2b03d343a48 removed '*.rej' from .gitignore,
-# but it is definitely a generated file.
-filechk_filelist = \
-	$< --exclude='*.rej' --output=$@_exclude --prefix=./ --rootdir=$(srctree) --stat=-
+%.tar.bz2: %.tar
+	$(call cmd,bzip2)
 
-.tmp_filelist: scripts/list-gitignored FORCE
-	$(call filechk,filelist)
+%.tar.xz: %.tar
+	$(call cmd,xzmisc)
 
-# tarball
-# ---------------------------------------------------------------------------
-
-quiet_cmd_tar = TAR     $@
-      cmd_tar = tar -c -f $@ $(tar-compress-opt) $(tar-exclude-opt) \
-                --owner=0 --group=0 --sort=name \
-                --transform 's:^\.:$*:S' -C $(tar-rootdir) .
-
-tar-rootdir := $(srctree)
+%.tar.zst: %.tar
+	$(call cmd,zstd)
 
-%.tar:
-	$(call cmd,tar)
-
-%.tar.gz: private tar-compress-opt := -I $(KGZIP)
-%.tar.gz:
-	$(call cmd,tar)
+# Git
+# ---------------------------------------------------------------------------
 
-%.tar.bz2: private tar-compress-opt := -I $(KBZIP2)
-%.tar.bz2:
-	$(call cmd,tar)
+filechk_HEAD = git -C $(srctree) rev-parse --verify HEAD 2>/dev/null
 
-%.tar.xz: private tar-compress-opt := -I $(XZ)
-%.tar.xz:
-	$(call cmd,tar)
+.tmp_HEAD: check-git FORCE
+	$(call filechk,HEAD)
 
-%.tar.zst: private tar-compress-opt := -I $(ZSTD)
-%.tar.zst:
-	$(call cmd,tar)
+PHONY += check-git
+check-git:
+	@if ! $(srctree)/scripts/check-git; then \
+		echo >&2 "error: creating source package requires git repository"; \
+		false; \
+	fi
 
 # Linux source tarball
 # ---------------------------------------------------------------------------
 
-linux.tar.gz: tar-exclude-opt = --exclude=./$@ --exclude-from=$<_exclude
-linux.tar.gz: .tmp_filelist
+quiet_cmd_archive_linux = ARCHIVE $@
+      cmd_archive_linux = \
+	git -C $(srctree) archive --output=$$(realpath $@) --prefix=$(basename $@)/ $$(cat $<)
+
+targets += linux.tar
+linux.tar: .tmp_HEAD FORCE
+	$(call if_changed,archive_linux)
 
 # rpm-pkg
 # ---------------------------------------------------------------------------
@@ -148,74 +141,62 @@ snap-pkg:
 # dir-pkg tar*-pkg - tarball targets
 # ---------------------------------------------------------------------------
 
-tar-pkg-tarball = linux-$(KERNELRELEASE)-$(ARCH).$(1)
-tar-pkg-phony = $(subst .,,$(1))-pkg
-
 tar-install: FORCE
 	$(Q)$(MAKE) -f $(srctree)/Makefile
 	+$(Q)$(srctree)/scripts/package/buildtar $@
 
+quiet_cmd_tar = TAR     $@
+      cmd_tar = cd $<; tar cf ../$@ --owner=root --group=root --sort=name *
+
+linux-$(KERNELRELEASE)-$(ARCH).tar: tar-install
+	$(call cmd,tar)
+
 PHONY += dir-pkg
 dir-pkg: tar-install
 	@echo "Kernel tree successfully created in $<"
 
-define tar-pkg-rule
-PHONY += $(tar-pkg-phony)
-$(tar-pkg-phony): $(tar-pkg-tarball)
+PHONY += tar-pkg
+tar-pkg: linux-$(KERNELRELEASE)-$(ARCH).tar
 	@:
 
-$(tar-pkg-tarball): private tar-rootdir := tar-install
-$(tar-pkg-tarball): tar-install
-endef
-
-$(foreach x, tar tar.gz tar.bz2 tar.xz tar.zst, $(eval $(call tar-pkg-rule,$(x))))
+tar%-pkg: linux-$(KERNELRELEASE)-$(ARCH).tar.% FORCE
+	@:
 
 # perf-tar*-src-pkg - generate a source tarball with perf source
 # ---------------------------------------------------------------------------
 
-perf-tar-src-pkg-tarball = perf-$(KERNELVERSION).$(1)
-perf-tar-src-pkg-phony   = perf-$(subst .,,$(1))-src-pkg
-
-quiet_cmd_stage_perf_src = STAGE   $@
-      cmd_stage_perf_src = \
-	rm -rf $@; \
-	mkdir -p $@; \
-	tar -c -f - --exclude-from=$<_exclude -C $(srctree) --files-from=$(srctree)/tools/perf/MANIFEST | \
-	tar -x -f - -C $@
-
-.tmp_perf: .tmp_filelist
-	$(call cmd,stage_perf_src)
-
-filechk_perf_head = \
-	if test -z "$(git -C $(srctree) rev-parse --show-cdup 2>/dev/null)" && \
-	       head=$$(git -C $(srctree) rev-parse --verify HEAD 2>/dev/null); then \
-		echo $$head; \
-	else \
-		echo "not a git tree"; \
-	fi
+.tmp_perf:
+	$(Q)mkdir .tmp_perf
 
-.tmp_perf/HEAD: .tmp_perf FORCE
-	$(call filechk,perf_head)
+.tmp_perf/HEAD: .tmp_HEAD | .tmp_perf
+	$(call cmd,copy)
 
 quiet_cmd_perf_version_file = GEN     $@
       cmd_perf_version_file = cd $(srctree)/tools/perf; util/PERF-VERSION-GEN $(dir $(abspath $@))
 
-# PERF-VERSION-FILE and HEAD are independent, but this avoids updating the
+# PERF-VERSION-FILE and .tmp_HEAD are independent, but this avoids updating the
 # timestamp of PERF-VERSION-FILE.
 # The best is to fix tools/perf/util/PERF-VERSION-GEN.
-.tmp_perf/PERF-VERSION-FILE: .tmp_perf/HEAD $(srctree)/tools/perf/util/PERF-VERSION-GEN
+.tmp_perf/PERF-VERSION-FILE: .tmp_HEAD $(srctree)/tools/perf/util/PERF-VERSION-GEN | .tmp_perf
 	$(call cmd,perf_version_file)
 
-define perf-tar-src-pkg-rule
-PHONY += $(perf-tar-src-pkg-phony)
-$(perf-tar-src-pkg-phony): $(perf-tar-src-pkg-tarball)
-	@:
+quiet_cmd_archive_perf = ARCHIVE $@
+      cmd_archive_perf = \
+	git -C $(srctree) archive --output=$$(realpath $@) --prefix=$(basename $@)/ \
+	--add-file=$$(realpath $(word 2, $^)) \
+	--add-file=$$(realpath $(word 3, $^)) \
+	$$(cat $(word 2, $^))^{tree} $$(cat $<)
 
-$(perf-tar-src-pkg-tarball): private tar-rootdir := .tmp_perf
-$(perf-tar-src-pkg-tarball): .tmp_filelist .tmp_perf/HEAD .tmp_perf/PERF-VERSION-FILE
-endef
+targets += perf-$(KERNELVERSION).tar
+perf-$(KERNELVERSION).tar: tools/perf/MANIFEST .tmp_perf/HEAD .tmp_perf/PERF-VERSION-FILE FORCE
+	$(call if_changed,archive_perf)
+
+PHONY += perf-tar-src-pkg
+perf-tar-src-pkg: perf-$(KERNELVERSION).tar
+	@:
 
-$(foreach x, tar tar.gz tar.bz2 tar.xz tar.zst, $(eval $(call perf-tar-src-pkg-rule,$(x))))
+perf-tar%-src-pkg: perf-$(KERNELVERSION).tar.% FORCE
+	@:
 
 # Help text displayed when executing 'make help'
 # ---------------------------------------------------------------------------
@@ -243,4 +224,13 @@ help:
 PHONY += FORCE
 FORCE:
 
+# Read all saved command lines and dependencies for the $(targets) we
+# may be building above, using $(if_changed{,_dep}). As an
+# optimization, we don't need to read them if the target does not
+# exist, we will rebuild anyway in that case.
+
+existing-targets := $(wildcard $(sort $(targets)))
+
+-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
+
 .PHONY: $(PHONY)
diff --git a/scripts/check-git b/scripts/check-git
new file mode 100755
index 000000000000..2ca6c5df10dd
--- /dev/null
+++ b/scripts/check-git
@@ -0,0 +1,14 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# succeed if we are in a git repository
+
+srctree="$(dirname $0)/.."
+
+if ! git -C "${srctree}" rev-parse --verify HEAD >/dev/null 2>/dev/null; then
+	exit 1
+fi
+
+if ! test -z $(git -C "${srctree}" rev-parse --show-cdup 2>/dev/null); then
+	exit 1
+fi
diff --git a/scripts/list-gitignored.c b/scripts/list-gitignored.c
deleted file mode 100644
index f9941f8dcd2b..000000000000
--- a/scripts/list-gitignored.c
+++ /dev/null
@@ -1,1057 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-//
-// Traverse the source tree, parsing all .gitignore files, and print file paths
-// that are ignored by git.
-// The output is suitable to the --exclude-from option of tar.
-// This is useful until the --exclude-vcs-ignores option gets working correctly.
-//
-// Copyright (C) 2023 Masahiro Yamada <masahiroy@kernel.org>
-//                      (a lot of code imported from GIT)
-
-#include <assert.h>
-#include <dirent.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <getopt.h>
-#include <stdarg.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-// Imported from commit 23c56f7bd5f1667f8b793d796bf30e39545920f6 in GIT
-//
-//---------------------------(IMPORT FROM GIT BEGIN)---------------------------
-
-// Copied from environment.c
-
-static bool ignore_case;
-
-// Copied from git-compat-util.h
-
-/* Sane ctype - no locale, and works with signed chars */
-#undef isascii
-#undef isspace
-#undef isdigit
-#undef isalpha
-#undef isalnum
-#undef isprint
-#undef islower
-#undef isupper
-#undef tolower
-#undef toupper
-#undef iscntrl
-#undef ispunct
-#undef isxdigit
-
-static const unsigned char sane_ctype[256];
-#define GIT_SPACE 0x01
-#define GIT_DIGIT 0x02
-#define GIT_ALPHA 0x04
-#define GIT_GLOB_SPECIAL 0x08
-#define GIT_REGEX_SPECIAL 0x10
-#define GIT_PATHSPEC_MAGIC 0x20
-#define GIT_CNTRL 0x40
-#define GIT_PUNCT 0x80
-#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
-#define isascii(x) (((x) & ~0x7f) == 0)
-#define isspace(x) sane_istest(x,GIT_SPACE)
-#define isdigit(x) sane_istest(x,GIT_DIGIT)
-#define isalpha(x) sane_istest(x,GIT_ALPHA)
-#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
-#define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
-#define islower(x) sane_iscase(x, 1)
-#define isupper(x) sane_iscase(x, 0)
-#define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
-#define iscntrl(x) (sane_istest(x,GIT_CNTRL))
-#define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
-		GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
-#define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1)
-#define tolower(x) sane_case((unsigned char)(x), 0x20)
-#define toupper(x) sane_case((unsigned char)(x), 0)
-
-static inline int sane_case(int x, int high)
-{
-	if (sane_istest(x, GIT_ALPHA))
-		x = (x & ~0x20) | high;
-	return x;
-}
-
-static inline int sane_iscase(int x, int is_lower)
-{
-	if (!sane_istest(x, GIT_ALPHA))
-		return 0;
-
-	if (is_lower)
-		return (x & 0x20) != 0;
-	else
-		return (x & 0x20) == 0;
-}
-
-// Copied from ctype.c
-
-enum {
-	S = GIT_SPACE,
-	A = GIT_ALPHA,
-	D = GIT_DIGIT,
-	G = GIT_GLOB_SPECIAL,	/* *, ?, [, \\ */
-	R = GIT_REGEX_SPECIAL,	/* $, (, ), +, ., ^, {, | */
-	P = GIT_PATHSPEC_MAGIC, /* other non-alnum, except for ] and } */
-	X = GIT_CNTRL,
-	U = GIT_PUNCT,
-	Z = GIT_CNTRL | GIT_SPACE
-};
-
-static const unsigned char sane_ctype[256] = {
-	X, X, X, X, X, X, X, X, X, Z, Z, X, X, Z, X, X,		/*   0.. 15 */
-	X, X, X, X, X, X, X, X, X, X, X, X, X, X, X, X,		/*  16.. 31 */
-	S, P, P, P, R, P, P, P, R, R, G, R, P, P, R, P,		/*  32.. 47 */
-	D, D, D, D, D, D, D, D, D, D, P, P, P, P, P, G,		/*  48.. 63 */
-	P, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,		/*  64.. 79 */
-	A, A, A, A, A, A, A, A, A, A, A, G, G, U, R, P,		/*  80.. 95 */
-	P, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A,		/*  96..111 */
-	A, A, A, A, A, A, A, A, A, A, A, R, R, U, P, X,		/* 112..127 */
-	/* Nothing in the 128.. range */
-};
-
-// Copied from hex.c
-
-static const signed char hexval_table[256] = {
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* 00-07 */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* 08-0f */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* 10-17 */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* 18-1f */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* 20-27 */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* 28-2f */
-	  0,  1,  2,  3,  4,  5,  6,  7,		/* 30-37 */
-	  8,  9, -1, -1, -1, -1, -1, -1,		/* 38-3f */
-	 -1, 10, 11, 12, 13, 14, 15, -1,		/* 40-47 */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* 48-4f */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* 50-57 */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* 58-5f */
-	 -1, 10, 11, 12, 13, 14, 15, -1,		/* 60-67 */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* 68-67 */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* 70-77 */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* 78-7f */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* 80-87 */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* 88-8f */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* 90-97 */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* 98-9f */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* a0-a7 */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* a8-af */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* b0-b7 */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* b8-bf */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* c0-c7 */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* c8-cf */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* d0-d7 */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* d8-df */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* e0-e7 */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* e8-ef */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* f0-f7 */
-	 -1, -1, -1, -1, -1, -1, -1, -1,		/* f8-ff */
-};
-
-// Copied from wildmatch.h
-
-#define WM_CASEFOLD 1
-#define WM_PATHNAME 2
-
-#define WM_NOMATCH 1
-#define WM_MATCH 0
-#define WM_ABORT_ALL -1
-#define WM_ABORT_TO_STARSTAR -2
-
-// Copied from wildmatch.c
-
-typedef unsigned char uchar;
-
-// local modification: remove NEGATE_CLASS(2)
-
-#define CC_EQ(class, len, litmatch) ((len) == sizeof (litmatch)-1 \
-				    && *(class) == *(litmatch) \
-				    && strncmp((char*)class, litmatch, len) == 0)
-
-// local modification: simpilify macros
-#define ISBLANK(c) ((c) == ' ' || (c) == '\t')
-#define ISGRAPH(c) (isprint(c) && !isspace(c))
-#define ISPRINT(c) isprint(c)
-#define ISDIGIT(c) isdigit(c)
-#define ISALNUM(c) isalnum(c)
-#define ISALPHA(c) isalpha(c)
-#define ISCNTRL(c) iscntrl(c)
-#define ISLOWER(c) islower(c)
-#define ISPUNCT(c) ispunct(c)
-#define ISSPACE(c) isspace(c)
-#define ISUPPER(c) isupper(c)
-#define ISXDIGIT(c) isxdigit(c)
-
-/* Match pattern "p" against "text" */
-static int dowild(const uchar *p, const uchar *text, unsigned int flags)
-{
-	uchar p_ch;
-	const uchar *pattern = p;
-
-	for ( ; (p_ch = *p) != '\0'; text++, p++) {
-		int matched, match_slash, negated;
-		uchar t_ch, prev_ch;
-		if ((t_ch = *text) == '\0' && p_ch != '*')
-			return WM_ABORT_ALL;
-		if ((flags & WM_CASEFOLD) && ISUPPER(t_ch))
-			t_ch = tolower(t_ch);
-		if ((flags & WM_CASEFOLD) && ISUPPER(p_ch))
-			p_ch = tolower(p_ch);
-		switch (p_ch) {
-		case '\\':
-			/* Literal match with following character.  Note that the test
-			 * in "default" handles the p[1] == '\0' failure case. */
-			p_ch = *++p;
-			/* FALLTHROUGH */
-		default:
-			if (t_ch != p_ch)
-				return WM_NOMATCH;
-			continue;
-		case '?':
-			/* Match anything but '/'. */
-			if ((flags & WM_PATHNAME) && t_ch == '/')
-				return WM_NOMATCH;
-			continue;
-		case '*':
-			if (*++p == '*') {
-				const uchar *prev_p = p - 2;
-				while (*++p == '*') {}
-				if (!(flags & WM_PATHNAME))
-					/* without WM_PATHNAME, '*' == '**' */
-					match_slash = 1;
-				else if ((prev_p < pattern || *prev_p == '/') &&
-				    (*p == '\0' || *p == '/' ||
-				     (p[0] == '\\' && p[1] == '/'))) {
-					/*
-					 * Assuming we already match 'foo/' and are at
-					 * <star star slash>, just assume it matches
-					 * nothing and go ahead match the rest of the
-					 * pattern with the remaining string. This
-					 * helps make foo/<*><*>/bar (<> because
-					 * otherwise it breaks C comment syntax) match
-					 * both foo/bar and foo/a/bar.
-					 */
-					if (p[0] == '/' &&
-					    dowild(p + 1, text, flags) == WM_MATCH)
-						return WM_MATCH;
-					match_slash = 1;
-				} else /* WM_PATHNAME is set */
-					match_slash = 0;
-			} else
-				/* without WM_PATHNAME, '*' == '**' */
-				match_slash = flags & WM_PATHNAME ? 0 : 1;
-			if (*p == '\0') {
-				/* Trailing "**" matches everything.  Trailing "*" matches
-				 * only if there are no more slash characters. */
-				if (!match_slash) {
-					if (strchr((char *)text, '/'))
-						return WM_NOMATCH;
-				}
-				return WM_MATCH;
-			} else if (!match_slash && *p == '/') {
-				/*
-				 * _one_ asterisk followed by a slash
-				 * with WM_PATHNAME matches the next
-				 * directory
-				 */
-				const char *slash = strchr((char*)text, '/');
-				if (!slash)
-					return WM_NOMATCH;
-				text = (const uchar*)slash;
-				/* the slash is consumed by the top-level for loop */
-				break;
-			}
-			while (1) {
-				if (t_ch == '\0')
-					break;
-				/*
-				 * Try to advance faster when an asterisk is
-				 * followed by a literal. We know in this case
-				 * that the string before the literal
-				 * must belong to "*".
-				 * If match_slash is false, do not look past
-				 * the first slash as it cannot belong to '*'.
-				 */
-				if (!is_glob_special(*p)) {
-					p_ch = *p;
-					if ((flags & WM_CASEFOLD) && ISUPPER(p_ch))
-						p_ch = tolower(p_ch);
-					while ((t_ch = *text) != '\0' &&
-					       (match_slash || t_ch != '/')) {
-						if ((flags & WM_CASEFOLD) && ISUPPER(t_ch))
-							t_ch = tolower(t_ch);
-						if (t_ch == p_ch)
-							break;
-						text++;
-					}
-					if (t_ch != p_ch)
-						return WM_NOMATCH;
-				}
-				if ((matched = dowild(p, text, flags)) != WM_NOMATCH) {
-					if (!match_slash || matched != WM_ABORT_TO_STARSTAR)
-						return matched;
-				} else if (!match_slash && t_ch == '/')
-					return WM_ABORT_TO_STARSTAR;
-				t_ch = *++text;
-			}
-			return WM_ABORT_ALL;
-		case '[':
-			p_ch = *++p;
-			if (p_ch == '^')
-				p_ch = '!';
-			/* Assign literal 1/0 because of "matched" comparison. */
-			negated = p_ch == '!' ? 1 : 0;
-			if (negated) {
-				/* Inverted character class. */
-				p_ch = *++p;
-			}
-			prev_ch = 0;
-			matched = 0;
-			do {
-				if (!p_ch)
-					return WM_ABORT_ALL;
-				if (p_ch == '\\') {
-					p_ch = *++p;
-					if (!p_ch)
-						return WM_ABORT_ALL;
-					if (t_ch == p_ch)
-						matched = 1;
-				} else if (p_ch == '-' && prev_ch && p[1] && p[1] != ']') {
-					p_ch = *++p;
-					if (p_ch == '\\') {
-						p_ch = *++p;
-						if (!p_ch)
-							return WM_ABORT_ALL;
-					}
-					if (t_ch <= p_ch && t_ch >= prev_ch)
-						matched = 1;
-					else if ((flags & WM_CASEFOLD) && ISLOWER(t_ch)) {
-						uchar t_ch_upper = toupper(t_ch);
-						if (t_ch_upper <= p_ch && t_ch_upper >= prev_ch)
-							matched = 1;
-					}
-					p_ch = 0; /* This makes "prev_ch" get set to 0. */
-				} else if (p_ch == '[' && p[1] == ':') {
-					const uchar *s;
-					int i;
-					for (s = p += 2; (p_ch = *p) && p_ch != ']'; p++) {} /*SHARED ITERATOR*/
-					if (!p_ch)
-						return WM_ABORT_ALL;
-					i = p - s - 1;
-					if (i < 0 || p[-1] != ':') {
-						/* Didn't find ":]", so treat like a normal set. */
-						p = s - 2;
-						p_ch = '[';
-						if (t_ch == p_ch)
-							matched = 1;
-						continue;
-					}
-					if (CC_EQ(s,i, "alnum")) {
-						if (ISALNUM(t_ch))
-							matched = 1;
-					} else if (CC_EQ(s,i, "alpha")) {
-						if (ISALPHA(t_ch))
-							matched = 1;
-					} else if (CC_EQ(s,i, "blank")) {
-						if (ISBLANK(t_ch))
-							matched = 1;
-					} else if (CC_EQ(s,i, "cntrl")) {
-						if (ISCNTRL(t_ch))
-							matched = 1;
-					} else if (CC_EQ(s,i, "digit")) {
-						if (ISDIGIT(t_ch))
-							matched = 1;
-					} else if (CC_EQ(s,i, "graph")) {
-						if (ISGRAPH(t_ch))
-							matched = 1;
-					} else if (CC_EQ(s,i, "lower")) {
-						if (ISLOWER(t_ch))
-							matched = 1;
-					} else if (CC_EQ(s,i, "print")) {
-						if (ISPRINT(t_ch))
-							matched = 1;
-					} else if (CC_EQ(s,i, "punct")) {
-						if (ISPUNCT(t_ch))
-							matched = 1;
-					} else if (CC_EQ(s,i, "space")) {
-						if (ISSPACE(t_ch))
-							matched = 1;
-					} else if (CC_EQ(s,i, "upper")) {
-						if (ISUPPER(t_ch))
-							matched = 1;
-						else if ((flags & WM_CASEFOLD) && ISLOWER(t_ch))
-							matched = 1;
-					} else if (CC_EQ(s,i, "xdigit")) {
-						if (ISXDIGIT(t_ch))
-							matched = 1;
-					} else /* malformed [:class:] string */
-						return WM_ABORT_ALL;
-					p_ch = 0; /* This makes "prev_ch" get set to 0. */
-				} else if (t_ch == p_ch)
-					matched = 1;
-			} while (prev_ch = p_ch, (p_ch = *++p) != ']');
-			if (matched == negated ||
-			    ((flags & WM_PATHNAME) && t_ch == '/'))
-				return WM_NOMATCH;
-			continue;
-		}
-	}
-
-	return *text ? WM_NOMATCH : WM_MATCH;
-}
-
-/* Match the "pattern" against the "text" string. */
-static int wildmatch(const char *pattern, const char *text, unsigned int flags)
-{
-	// local modification: move WM_CASEFOLD here
-	if (ignore_case)
-		flags |= WM_CASEFOLD;
-
-	return dowild((const uchar*)pattern, (const uchar*)text, flags);
-}
-
-// Copied from dir.h
-
-#define PATTERN_FLAG_NODIR 1
-#define PATTERN_FLAG_ENDSWITH 4
-#define PATTERN_FLAG_MUSTBEDIR 8
-#define PATTERN_FLAG_NEGATIVE 16
-
-// Copied from dir.c
-
-static int fspathncmp(const char *a, const char *b, size_t count)
-{
-	return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count);
-}
-
-static int simple_length(const char *match)
-{
-	int len = -1;
-
-	for (;;) {
-		unsigned char c = *match++;
-		len++;
-		if (c == '\0' || is_glob_special(c))
-			return len;
-	}
-}
-
-static int no_wildcard(const char *string)
-{
-	return string[simple_length(string)] == '\0';
-}
-
-static void parse_path_pattern(const char **pattern,
-			       int *patternlen,
-			       unsigned *flags,
-			       int *nowildcardlen)
-{
-	const char *p = *pattern;
-	size_t i, len;
-
-	*flags = 0;
-	if (*p == '!') {
-		*flags |= PATTERN_FLAG_NEGATIVE;
-		p++;
-	}
-	len = strlen(p);
-	if (len && p[len - 1] == '/') {
-		len--;
-		*flags |= PATTERN_FLAG_MUSTBEDIR;
-	}
-	for (i = 0; i < len; i++) {
-		if (p[i] == '/')
-			break;
-	}
-	if (i == len)
-		*flags |= PATTERN_FLAG_NODIR;
-	*nowildcardlen = simple_length(p);
-	/*
-	 * we should have excluded the trailing slash from 'p' too,
-	 * but that's one more allocation. Instead just make sure
-	 * nowildcardlen does not exceed real patternlen
-	 */
-	if (*nowildcardlen > len)
-		*nowildcardlen = len;
-	if (*p == '*' && no_wildcard(p + 1))
-		*flags |= PATTERN_FLAG_ENDSWITH;
-	*pattern = p;
-	*patternlen = len;
-}
-
-static void trim_trailing_spaces(char *buf)
-{
-	char *p, *last_space = NULL;
-
-	for (p = buf; *p; p++)
-		switch (*p) {
-		case ' ':
-			if (!last_space)
-				last_space = p;
-			break;
-		case '\\':
-			p++;
-			if (!*p)
-				return;
-			/* fallthrough */
-		default:
-			last_space = NULL;
-		}
-
-	if (last_space)
-		*last_space = '\0';
-}
-
-static int match_basename(const char *basename, int basenamelen,
-			  const char *pattern, int prefix, int patternlen,
-			  unsigned flags)
-{
-	if (prefix == patternlen) {
-		if (patternlen == basenamelen &&
-		    !fspathncmp(pattern, basename, basenamelen))
-			return 1;
-	} else if (flags & PATTERN_FLAG_ENDSWITH) {
-		/* "*literal" matching against "fooliteral" */
-		if (patternlen - 1 <= basenamelen &&
-		    !fspathncmp(pattern + 1,
-				   basename + basenamelen - (patternlen - 1),
-				   patternlen - 1))
-			return 1;
-	} else {
-		// local modification: call wildmatch() directly
-		if (!wildmatch(pattern, basename, flags))
-			return 1;
-	}
-	return 0;
-}
-
-static int match_pathname(const char *pathname, int pathlen,
-			  const char *base, int baselen,
-			  const char *pattern, int prefix, int patternlen)
-{
-	// local modification: remove local variables
-
-	/*
-	 * match with FNM_PATHNAME; the pattern has base implicitly
-	 * in front of it.
-	 */
-	if (*pattern == '/') {
-		pattern++;
-		patternlen--;
-		prefix--;
-	}
-
-	/*
-	 * baselen does not count the trailing slash. base[] may or
-	 * may not end with a trailing slash though.
-	 */
-	if (pathlen < baselen + 1 ||
-	    (baselen && pathname[baselen] != '/') ||
-	    fspathncmp(pathname, base, baselen))
-		return 0;
-
-	// local modification: simplified because always baselen > 0
-	pathname += baselen + 1;
-	pathlen -= baselen + 1;
-
-	if (prefix) {
-		/*
-		 * if the non-wildcard part is longer than the
-		 * remaining pathname, surely it cannot match.
-		 */
-		if (prefix > pathlen)
-			return 0;
-
-		if (fspathncmp(pattern, pathname, prefix))
-			return 0;
-		pattern += prefix;
-		patternlen -= prefix;
-		pathname += prefix;
-		pathlen -= prefix;
-
-		/*
-		 * If the whole pattern did not have a wildcard,
-		 * then our prefix match is all we need; we
-		 * do not need to call fnmatch at all.
-		 */
-		if (!patternlen && !pathlen)
-			return 1;
-	}
-
-	// local modification: call wildmatch() directly
-	return !wildmatch(pattern, pathname, WM_PATHNAME);
-}
-
-// Copied from git/utf8.c
-
-static const char utf8_bom[] = "\357\273\277";
-
-//----------------------------(IMPORT FROM GIT END)----------------------------
-
-struct pattern {
-	unsigned int flags;
-	int nowildcardlen;
-	int patternlen;
-	int dirlen;
-	char pattern[];
-};
-
-static struct pattern **pattern_list;
-static int nr_patterns, alloced_patterns;
-
-// Remember the number of patterns at each directory level
-static int *nr_patterns_at;
-// Track the current/max directory level;
-static int depth, max_depth;
-static bool debug_on;
-static FILE *out_fp, *stat_fp;
-static char *prefix = "";
-static char *progname;
-
-static void __attribute__((noreturn)) perror_exit(const char *s)
-{
-	perror(s);
-
-	exit(EXIT_FAILURE);
-}
-
-static void __attribute__((noreturn)) error_exit(const char *fmt, ...)
-{
-	va_list args;
-
-	fprintf(stderr, "%s: error: ", progname);
-
-	va_start(args, fmt);
-	vfprintf(stderr, fmt, args);
-	va_end(args);
-
-	exit(EXIT_FAILURE);
-}
-
-static void debug(const char *fmt, ...)
-{
-	va_list args;
-	int i;
-
-	if (!debug_on)
-		return;
-
-	fprintf(stderr, "[DEBUG] ");
-
-	for (i = 0; i < depth * 2; i++)
-		fputc(' ', stderr);
-
-	va_start(args, fmt);
-	vfprintf(stderr, fmt, args);
-	va_end(args);
-}
-
-static void *xrealloc(void *ptr, size_t size)
-{
-	ptr = realloc(ptr, size);
-	if (!ptr)
-		perror_exit(progname);
-
-	return ptr;
-}
-
-static void *xmalloc(size_t size)
-{
-	return xrealloc(NULL, size);
-}
-
-// similar to last_matching_pattern_from_list() in GIT
-static bool is_ignored(const char *path, int pathlen, int dirlen, bool is_dir)
-{
-	int i;
-
-	// Search in the reverse order because the last matching pattern wins.
-	for (i = nr_patterns - 1; i >= 0; i--) {
-		struct pattern *p = pattern_list[i];
-		unsigned int flags = p->flags;
-		const char *gitignore_dir = p->pattern + p->patternlen + 1;
-		bool ignored;
-
-		if ((flags & PATTERN_FLAG_MUSTBEDIR) && !is_dir)
-			continue;
-
-		if (flags & PATTERN_FLAG_NODIR) {
-			if (!match_basename(path + dirlen + 1,
-					    pathlen - dirlen - 1,
-					    p->pattern,
-					    p->nowildcardlen,
-					    p->patternlen,
-					    p->flags))
-				continue;
-		} else {
-			if (!match_pathname(path, pathlen,
-					    gitignore_dir, p->dirlen,
-					    p->pattern,
-					    p->nowildcardlen,
-					    p->patternlen))
-				continue;
-		}
-
-		debug("%s: matches %s%s%s (%s/.gitignore)\n", path,
-		      flags & PATTERN_FLAG_NEGATIVE ? "!" : "", p->pattern,
-		      flags & PATTERN_FLAG_MUSTBEDIR ? "/" : "",
-		      gitignore_dir);
-
-		ignored = (flags & PATTERN_FLAG_NEGATIVE) == 0;
-		if (ignored)
-			debug("Ignore: %s\n", path);
-
-		return ignored;
-	}
-
-	debug("%s: no match\n", path);
-
-	return false;
-}
-
-static void add_pattern(const char *string, const char *dir, int dirlen)
-{
-	struct pattern *p;
-	int patternlen, nowildcardlen;
-	unsigned int flags;
-
-	parse_path_pattern(&string, &patternlen, &flags, &nowildcardlen);
-
-	if (patternlen == 0)
-		return;
-
-	p = xmalloc(sizeof(*p) + patternlen + dirlen + 2);
-
-	memcpy(p->pattern, string, patternlen);
-	p->pattern[patternlen] = 0;
-	memcpy(p->pattern + patternlen + 1, dir, dirlen);
-	p->pattern[patternlen + 1 + dirlen] = 0;
-
-	p->patternlen = patternlen;
-	p->nowildcardlen = nowildcardlen;
-	p->dirlen = dirlen;
-	p->flags = flags;
-
-	debug("Add pattern: %s%s%s\n",
-	      flags & PATTERN_FLAG_NEGATIVE ? "!" : "", p->pattern,
-	      flags & PATTERN_FLAG_MUSTBEDIR ? "/" : "");
-
-	if (nr_patterns >= alloced_patterns) {
-		alloced_patterns += 128;
-		pattern_list = xrealloc(pattern_list,
-					sizeof(*pattern_list) * alloced_patterns);
-	}
-
-	pattern_list[nr_patterns++] = p;
-}
-
-// similar to add_patterns_from_buffer() in GIT
-static void add_patterns_from_gitignore(const char *dir, int dirlen)
-{
-	struct stat st;
-	char path[PATH_MAX], *buf, *entry;
-	size_t size;
-	int fd, pathlen, i;
-
-	pathlen = snprintf(path, sizeof(path), "%s/.gitignore", dir);
-	if (pathlen >= sizeof(path))
-		error_exit("%s: too long path was truncated\n", path);
-
-	fd = open(path, O_RDONLY | O_NOFOLLOW);
-	if (fd < 0) {
-		if (errno != ENOENT)
-			return perror_exit(path);
-		return;
-	}
-
-	if (fstat(fd, &st) < 0)
-		perror_exit(path);
-
-	size = st.st_size;
-
-	buf = xmalloc(size + 1);
-	if (read(fd, buf, st.st_size) != st.st_size)
-		perror_exit(path);
-
-	buf[st.st_size] = '\n';
-	if (close(fd))
-		perror_exit(path);
-
-	debug("Parse %s\n", path);
-
-	entry = buf;
-
-	// skip utf8 bom
-	if (!strncmp(entry, utf8_bom, strlen(utf8_bom)))
-		entry += strlen(utf8_bom);
-
-	for (i = entry - buf; i < size; i++) {
-		if (buf[i] == '\n') {
-			if (entry != buf + i && entry[0] != '#') {
-				buf[i - (i && buf[i-1] == '\r')] = 0;
-				trim_trailing_spaces(entry);
-				add_pattern(entry, dir, dirlen);
-			}
-			entry = buf + i + 1;
-		}
-	}
-
-	free(buf);
-}
-
-// Save the current number of patterns and increment the depth
-static void increment_depth(void)
-{
-	if (depth >= max_depth) {
-		max_depth += 1;
-		nr_patterns_at = xrealloc(nr_patterns_at,
-					  sizeof(*nr_patterns_at) * max_depth);
-	}
-
-	nr_patterns_at[depth] = nr_patterns;
-	depth++;
-}
-
-// Decrement the depth, and free up the patterns of this directory level.
-static void decrement_depth(void)
-{
-	depth--;
-	assert(depth >= 0);
-
-	while (nr_patterns > nr_patterns_at[depth])
-		free(pattern_list[--nr_patterns]);
-}
-
-static void print_path(const char *path)
-{
-	// The path always starts with "./"
-	assert(strlen(path) >= 2);
-
-	// Replace the root directory with a preferred prefix.
-	// This is useful for the tar command.
-	fprintf(out_fp, "%s%s\n", prefix, path + 2);
-}
-
-static void print_stat(const char *path, struct stat *st)
-{
-	if (!stat_fp)
-		return;
-
-	if (!S_ISREG(st->st_mode) && !S_ISLNK(st->st_mode))
-		return;
-
-	assert(strlen(path) >= 2);
-
-	fprintf(stat_fp, "%c %9ld %10ld %s\n",
-		S_ISLNK(st->st_mode) ? 'l' : '-',
-		st->st_size, st->st_mtim.tv_sec, path + 2);
-}
-
-// Traverse the entire directory tree, parsing .gitignore files.
-// Print file paths that are not tracked by git.
-//
-// Return true if all files under the directory are ignored, false otherwise.
-static bool traverse_directory(const char *dir, int dirlen)
-{
-	bool all_ignored = true;
-	DIR *dirp;
-
-	debug("Enter[%d]: %s\n", depth, dir);
-	increment_depth();
-
-	add_patterns_from_gitignore(dir, dirlen);
-
-	dirp = opendir(dir);
-	if (!dirp)
-		perror_exit(dir);
-
-	while (1) {
-		struct dirent *d;
-		struct stat st;
-		char path[PATH_MAX];
-		int pathlen;
-		bool ignored;
-
-		errno = 0;
-		d = readdir(dirp);
-		if (!d) {
-			if (errno)
-				perror_exit(dir);
-			break;
-		}
-
-		if (!strcmp(d->d_name, "..") || !strcmp(d->d_name, "."))
-			continue;
-
-		pathlen = snprintf(path, sizeof(path), "%s/%s", dir, d->d_name);
-		if (pathlen >= sizeof(path))
-			error_exit("%s: too long path was truncated\n", path);
-
-		if (lstat(path, &st) < 0)
-			perror_exit(path);
-
-		if ((!S_ISREG(st.st_mode) && !S_ISDIR(st.st_mode) && !S_ISLNK(st.st_mode)) ||
-		    is_ignored(path, pathlen, dirlen, S_ISDIR(st.st_mode))) {
-			ignored = true;
-		} else {
-			if (S_ISDIR(st.st_mode) && !S_ISLNK(st.st_mode))
-				// If all the files in a directory are ignored,
-				// let's ignore that directory as well. This
-				// will avoid empty directories in the tarball.
-				ignored = traverse_directory(path, pathlen);
-			else
-				ignored = false;
-		}
-
-		if (ignored) {
-			print_path(path);
-		} else {
-			print_stat(path, &st);
-			all_ignored = false;
-		}
-	}
-
-	if (closedir(dirp))
-		perror_exit(dir);
-
-	decrement_depth();
-	debug("Leave[%d]: %s\n", depth, dir);
-
-	return all_ignored;
-}
-
-static void usage(void)
-{
-	fprintf(stderr,
-		"usage: %s [options]\n"
-		"\n"
-		"Show files that are ignored by git\n"
-		"\n"
-		"options:\n"
-		"  -d, --debug                  print debug messages to stderr\n"
-		"  -e, --exclude PATTERN        add the given exclude pattern\n"
-		"  -h, --help                   show this help message and exit\n"
-		"  -i, --ignore-case            Ignore case differences between the patterns and the files\n"
-		"  -o, --output FILE            output the ignored files to a file (default: '-', i.e. stdout)\n"
-		"  -p, --prefix PREFIX          prefix added to each path (default: empty string)\n"
-		"  -r, --rootdir DIR            root of the source tree (default: current working directory)\n"
-		"  -s, --stat FILE              output the file stat of non-ignored files to a file\n",
-		progname);
-}
-
-static void open_output(const char *pathname, FILE **fp)
-{
-	if (strcmp(pathname, "-")) {
-		*fp = fopen(pathname, "w");
-		if (!*fp)
-			perror_exit(pathname);
-	} else {
-		*fp = stdout;
-	}
-}
-
-static void close_output(const char *pathname, FILE *fp)
-{
-	fflush(fp);
-
-	if (ferror(fp))
-		error_exit("not all data was written to the output\n");
-
-	if (fclose(fp))
-		perror_exit(pathname);
-}
-
-int main(int argc, char *argv[])
-{
-	const char *output = "-";
-	const char *rootdir = ".";
-	const char *stat = NULL;
-
-	progname = strrchr(argv[0], '/');
-	if (progname)
-		progname++;
-	else
-		progname = argv[0];
-
-	while (1) {
-		static struct option long_options[] = {
-			{"debug",       no_argument,       NULL, 'd'},
-			{"help",        no_argument,       NULL, 'h'},
-			{"ignore-case", no_argument,       NULL, 'i'},
-			{"output",      required_argument, NULL, 'o'},
-			{"prefix",      required_argument, NULL, 'p'},
-			{"rootdir",     required_argument, NULL, 'r'},
-			{"stat",        required_argument, NULL, 's'},
-			{"exclude",     required_argument, NULL, 'x'},
-			{},
-		};
-
-		int c = getopt_long(argc, argv, "dhino:p:r:s:x:", long_options, NULL);
-
-		if (c == -1)
-			break;
-
-		switch (c) {
-		case 'd':
-			debug_on = true;
-			break;
-		case 'h':
-			usage();
-			exit(0);
-		case 'i':
-			ignore_case = true;
-			break;
-		case 'o':
-			output = optarg;
-			break;
-		case 'p':
-			prefix = optarg;
-			break;
-		case 'r':
-			rootdir = optarg;
-			break;
-		case 's':
-			stat = optarg;
-			break;
-		case 'x':
-			add_pattern(optarg, ".", strlen("."));
-			break;
-		case '?':
-			usage();
-			/* fallthrough */
-		default:
-			exit(EXIT_FAILURE);
-		}
-	}
-
-	open_output(output, &out_fp);
-	if (stat && stat[0])
-		open_output(stat, &stat_fp);
-
-	if (chdir(rootdir))
-		perror_exit(rootdir);
-
-	add_pattern(".git/", ".", strlen("."));
-
-	if (traverse_directory(".", strlen(".")))
-		print_path("./");
-
-	assert(depth == 0);
-
-	while (nr_patterns > 0)
-		free(pattern_list[--nr_patterns]);
-	free(pattern_list);
-	free(nr_patterns_at);
-
-	close_output(output, out_fp);
-	if (stat_fp)
-		close_output(stat, stat_fp);
-
-	return 0;
-}
diff --git a/scripts/package/gen-diff-patch b/scripts/package/gen-diff-patch
new file mode 100755
index 000000000000..f842ab50a780
--- /dev/null
+++ b/scripts/package/gen-diff-patch
@@ -0,0 +1,44 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0-only
+
+diff_patch="${1}"
+untracked_patch="${2}"
+srctree=$(dirname $0)/../..
+
+rm -f ${diff_patch} ${untracked_patch}
+
+if ! ${srctree}/scripts/check-git; then
+	exit
+fi
+
+mkdir -p "$(dirname ${diff_patch})" "$(dirname ${untracked_patch})"
+
+git -C "${srctree}" diff HEAD > "${diff_patch}"
+
+if [ ! -s "${diff_patch}" ]; then
+	rm -f "${diff_patch}"
+	exit
+fi
+
+git -C ${srctree} status --porcelain --untracked-files=all |
+while read stat path
+do
+	if [ "${stat}" = '??' ]; then
+
+		if ! diff -u /dev/null "${srctree}/${path}" > .tmp_diff &&
+			! head -n1 .tmp_diff | grep -q "Binary files"; then
+			{
+				echo "--- /dev/null"
+				echo "+++ linux/$path"
+				cat .tmp_diff | tail -n +3
+			} >> ${untracked_patch}
+		fi
+	fi
+done
+
+rm -f .tmp_diff
+
+if [ ! -s "${diff_patch}" ]; then
+	rm -f "${diff_patch}"
+	exit
+fi
diff --git a/scripts/package/mkdebian b/scripts/package/mkdebian
index e80a661a79ee..e20a2b5be9eb 100755
--- a/scripts/package/mkdebian
+++ b/scripts/package/mkdebian
@@ -91,7 +91,7 @@ version=$KERNELRELEASE
 if [ -n "$KDEB_PKGVERSION" ]; then
 	packageversion=$KDEB_PKGVERSION
 else
-	packageversion=$version-$($srctree/init/build-version)
+	packageversion=$(${srctree}/scripts/setlocalversion --no-local ${srctree})-$($srctree/init/build-version)
 fi
 sourcename=${KDEB_SOURCENAME:-linux-upstream}
 
@@ -152,6 +152,14 @@ mkdir -p debian/patches
 } > debian/patches/config
 echo config > debian/patches/series
 
+$(dirname $0)/gen-diff-patch debian/patches/diff.patch debian/patches/untracked.patch
+if [ -f debian/patches/diff.patch ]; then
+	echo diff.patch >> debian/patches/series
+fi
+if [ -f debian/patches/untracked.patch ]; then
+	echo untracked.patch >> debian/patches/series
+fi
+
 echo $debarch > debian/arch
 extra_build_depends=", $(if_enabled_echo CONFIG_UNWINDER_ORC libelf-dev:native)"
 extra_build_depends="$extra_build_depends, $(if_enabled_echo CONFIG_SYSTEM_TRUSTED_KEYRING libssl-dev:native)"
diff --git a/scripts/package/mkspec b/scripts/package/mkspec
index 5f007137f5a0..b7d1dc28a5d6 100755
--- a/scripts/package/mkspec
+++ b/scripts/package/mkspec
@@ -19,6 +19,8 @@ else
 	mkdir -p rpmbuild/SOURCES
 	cp linux.tar.gz rpmbuild/SOURCES
 	cp "${KCONFIG_CONFIG}" rpmbuild/SOURCES/config
+	$(dirname $0)/gen-diff-patch rpmbuild/SOURCES/diff.patch rpmbuild/SOURCES/untracked.patch
+	touch rpmbuild/SOURCES/diff.patch rpmbuild/SOURCES/untracked.patch
 fi
 
 if grep -q CONFIG_MODULES=y include/config/auto.conf; then
@@ -53,6 +55,8 @@ sed -e '/^DEL/d' -e 's/^\t*//' <<EOF
 	URL: https://www.kernel.org
 $S	Source0: linux.tar.gz
 $S	Source1: config
+$S	Source2: diff.patch
+$S	Source3: untracked.patch
 	Provides: $PROVIDES
 $S	BuildRequires: bc binutils bison dwarves
 $S	BuildRequires: (elfutils-libelf-devel or libelf-devel) flex
@@ -90,6 +94,12 @@ $S$M
 $S	%prep
 $S	%setup -q -n linux
 $S	cp %{SOURCE1} .config
+$S	if [ -s %{SOURCE2} ]; then
+$S		patch -p1 < %{SOURCE2}
+$S	fi
+$S	if [ -s %{SOURCE3} ]; then
+$S		patch -p1 < %{SOURCE3}
+$S	fi
 $S
 $S	%build
 $S	$MAKE %{?_smp_mflags} KERNELRELEASE=$KERNELRELEASE KBUILD_BUILD_VERSION=%{release}
diff --git a/scripts/setlocalversion b/scripts/setlocalversion
index e54839a42d4b..3d3babac8298 100755
--- a/scripts/setlocalversion
+++ b/scripts/setlocalversion
@@ -11,10 +11,16 @@
 #
 
 usage() {
-	echo "Usage: $0 [srctree]" >&2
+	echo "Usage: $0 [--no-local] [srctree]" >&2
 	exit 1
 }
 
+no_local=false
+if test "$1" = "--no-local"; then
+	no_local=true
+	shift
+fi
+
 srctree=.
 if test $# -gt 0; then
 	srctree=$1
@@ -26,14 +32,22 @@ fi
 
 scm_version()
 {
-	local short
+	local short=false
+	local no_dirty=false
 	local tag
-	short=false
+
+	while [ $# -gt 0 ];
+	do
+		case "$1" in
+		--short)
+			short=true;;
+		--no-dirty)
+			no_dirty=true;;
+		esac
+		shift
+	done
 
 	cd "$srctree"
-	if test "$1" = "--short"; then
-		short=true
-	fi
 
 	if test -n "$(git rev-parse --show-cdup 2>/dev/null)"; then
 		return
@@ -75,6 +89,10 @@ scm_version()
 		printf '%s%s' -g "$(echo $head | cut -c1-12)"
 	fi
 
+	if ${no_dirty}; then
+		return
+	fi
+
 	# Check for uncommitted changes.
 	# This script must avoid any write attempt to the source tree, which
 	# might be read-only.
@@ -110,11 +128,6 @@ collect_files()
 	echo "$res"
 }
 
-if ! test -e include/config/auto.conf; then
-	echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2
-	exit 1
-fi
-
 if [ -z "${KERNELVERSION}" ]; then
 	echo "KERNELVERSION is not set" >&2
 	exit 1
@@ -126,6 +139,16 @@ if test ! "$srctree" -ef .; then
 	file_localversion="${file_localversion}$(collect_files "$srctree"/localversion*)"
 fi
 
+if ${no_local}; then
+	echo "${KERNELVERSION}$(scm_version --no-dirty)"
+	exit 0
+fi
+
+if ! test -e include/config/auto.conf; then
+	echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2
+	exit 1
+fi
+
 # version string from CONFIG_LOCALVERSION
 config_localversion=$(sed -n 's/^CONFIG_LOCALVERSION=\(.*\)$/\1/p' include/config/auto.conf)