[PATCH] Makefile: move ctags and cscope support to a shell script

[Antony Pavlov <antonynpavlov@gmail.com>]

The scripts/tags.sh file copied from linux-3.6.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
 Makefile        |  111 +----------------------
 scripts/tags.sh |  265 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 268 insertions(+), 108 deletions(-)
 create mode 100755 scripts/tags.sh

diff --git a/Makefile b/Makefile
index 05b8be5..e3a23dd 100644
--- a/Makefile
+++ b/Makefile
@@ -1166,115 +1166,10 @@ htmldocs: Doxyfile.version
 
 # Generate tags for editors
 # ---------------------------------------------------------------------------
+quiet_cmd_tags = GEN     $@
+      cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
 
-#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
-#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
-#Adding $(srctree) adds about 20M on i386 to the size of the output file!
-
-ifeq ($(src),$(obj))
-__srctree =
-else
-__srctree = $(srctree)/
-endif
-
-ifeq ($(ALLSOURCE_ARCHS),)
-ifeq ($(ARCH),um)
-ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
-else
-ALLINCLUDE_ARCHS := $(ARCH)
-endif
-else
-#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
-ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
-endif
-
-ALLSOURCE_ARCHS := $(ARCH)
-
-define find-sources
-        ( find $(__srctree) $(RCS_FIND_IGNORE) \
-	       \( -name include -o -name arch \) -prune -o \
-	       -name $1 -print; \
-	  for ARCH in $(ALLSOURCE_ARCHS) ; do \
-	       find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
-	            -name $1 -print; \
-	  done ; \
-	  find $(__srctree)include $(RCS_FIND_IGNORE) \
-	       \( -name config -o -name 'asm-*' \) -prune \
-	       -o -name $1 -print; \
-	  for ARCH in $(ALLINCLUDE_ARCHS) ; do \
-	       test -e $(__srctree)include/asm-$${arch} && \
-	         find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
-	           -name $1 -print; \
-	      test -e $(__srctree)arch/$${arch}/include/asm && \
-	        find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \
-	            -name $1 -print; \
-	  done ; \
-	  find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
-	       -name $1 -print )
-endef
-
-define all-sources
-	$(call find-sources,'*.[chS]')
-endef
-define all-kconfigs
-	$(call find-sources,'Kconfig*')
-endef
-define all-defconfigs
-	$(call find-sources,'defconfig')
-endef
-
-define xtags
-	if $1 --version 2>&1 | grep -iq exuberant; then \
-	    $(all-sources) | xargs $1 -a \
-		-I __initdata,__exitdata,__acquires,__releases \
-		-I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
-		--extra=+f --c-kinds=+px \
-		--regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
-	    $(all-kconfigs) | xargs $1 -a \
-		--langdef=kconfig \
-		--language-force=kconfig \
-		--regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
-	    $(all-defconfigs) | xargs -r $1 -a \
-		--langdef=dotconfig \
-		--language-force=dotconfig \
-		--regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
-	elif $1 --version 2>&1 | grep -iq emacs; then \
-	    $(all-sources) | xargs $1 -a; \
-	    $(all-kconfigs) | xargs $1 -a \
-		--regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
-	    $(all-defconfigs) | xargs -r $1 -a \
-		--regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
-	else \
-	    $(all-sources) | xargs $1 -a; \
-	fi
-endef
-
-quiet_cmd_cscope-file = FILELST cscope.files
-      cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
-
-quiet_cmd_cscope = MAKE    cscope.out
-      cmd_cscope = cscope -b
-
-cscope: FORCE
-	$(call cmd,cscope-file)
-	$(call cmd,cscope)
-
-quiet_cmd_TAGS = MAKE   $@
-define cmd_TAGS
-	rm -f $@; \
-	$(call xtags,etags)
-endef
-
-TAGS: FORCE
-	$(call cmd,TAGS)
-
-quiet_cmd_tags = MAKE   $@
-define cmd_tags
-	rm -f $@; \
-	$(call xtags,ctags)
-endef
-
-tags: FORCE
+tags TAGS cscope: FORCE
 	$(call cmd,tags)
 
 
diff --git a/scripts/tags.sh b/scripts/tags.sh
new file mode 100755
index 0000000..79fdafb
--- /dev/null
+++ b/scripts/tags.sh
@@ -0,0 +1,265 @@
+#!/bin/sh
+# Generate tags or cscope files
+# Usage tags.sh <mode>
+#
+# mode may be any of: tags, TAGS, cscope
+#
+# Uses the following environment variables:
+# ARCH, SUBARCH, SRCARCH, srctree, src, obj
+
+if [ "$KBUILD_VERBOSE" = "1" ]; then
+	set -x
+fi
+
+# This is a duplicate of RCS_FIND_IGNORE without escaped '()'
+ignore="( -name SCCS -o -name BitKeeper -o -name .svn -o \
+          -name CVS  -o -name .pc       -o -name .hg  -o \
+          -name .git )                                   \
+          -prune -o"
+
+# Do not use full path if we do not use O=.. builds
+# Use make O=. {tags|cscope}
+# to force full paths for a non-O= build
+if [ "${KBUILD_SRC}" = "" ]; then
+	tree=
+else
+	tree=${srctree}/
+fi
+
+# Find all available archs
+find_all_archs()
+{
+	ALLSOURCE_ARCHS=""
+	for arch in `ls ${tree}arch`; do
+		ALLSOURCE_ARCHS="${ALLSOURCE_ARCHS} "${arch##\/}
+	done
+}
+
+# Detect if ALLSOURCE_ARCHS is set. If not, we assume SRCARCH
+if [ "${ALLSOURCE_ARCHS}" = "" ]; then
+	ALLSOURCE_ARCHS=${SRCARCH}
+elif [ "${ALLSOURCE_ARCHS}" = "all" ]; then
+	find_all_archs
+fi
+
+# find sources in arch/$ARCH
+find_arch_sources()
+{
+	for i in $archincludedir; do
+		prune="$prune -wholename $i -prune -o"
+	done
+	find ${tree}arch/$1 $ignore $prune -name "$2" -print;
+}
+
+# find sources in arch/$1/include
+find_arch_include_sources()
+{
+	include=$(find ${tree}arch/$1/ -name include -type d);
+	if [ -n "$include" ]; then
+		archincludedir="$archincludedir $include"
+		find $include $ignore -name "$2" -print;
+	fi
+}
+
+# find sources in include/
+find_include_sources()
+{
+	find ${tree}include $ignore -name config -prune -o -name "$1" -print;
+}
+
+# find sources in rest of tree
+# we could benefit from a list of dirs to search in here
+find_other_sources()
+{
+	find ${tree}* $ignore \
+	     \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
+	       -name "$1" -print;
+}
+
+find_sources()
+{
+	find_arch_sources $1 "$2"
+}
+
+all_sources()
+{
+	find_arch_include_sources ${SRCARCH} '*.[chS]'
+	if [ ! -z "$archinclude" ]; then
+		find_arch_include_sources $archinclude '*.[chS]'
+	fi
+	find_include_sources '*.[chS]'
+	for arch in $ALLSOURCE_ARCHS
+	do
+		find_sources $arch '*.[chS]'
+	done
+	find_other_sources '*.[chS]'
+}
+
+all_kconfigs()
+{
+	for arch in $ALLSOURCE_ARCHS; do
+		find_sources $arch 'Kconfig*'
+	done
+	find_other_sources 'Kconfig*'
+}
+
+all_defconfigs()
+{
+	find_sources $ALLSOURCE_ARCHS "defconfig"
+}
+
+docscope()
+{
+	(echo \-k; echo \-q; all_sources) > cscope.files
+	cscope -b -f cscope.out
+}
+
+dogtags()
+{
+	all_sources | gtags -i -f -
+}
+
+exuberant()
+{
+	all_sources | xargs $1 -a                               \
+	-I __initdata,__exitdata,__acquires,__releases          \
+	-I __read_mostly,____cacheline_aligned                  \
+	-I ____cacheline_aligned_in_smp                         \
+	-I ____cacheline_internodealigned_in_smp                \
+	-I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL                      \
+	-I DEFINE_TRACE,EXPORT_TRACEPOINT_SYMBOL,EXPORT_TRACEPOINT_SYMBOL_GPL \
+	--extra=+f --c-kinds=+px                                \
+	--regex-asm='/^(ENTRY|_GLOBAL)\(([^)]*)\).*/\2/'        \
+	--regex-c='/^SYSCALL_DEFINE[[:digit:]]?\(([^,)]*).*/sys_\1/' \
+	--regex-c++='/^TRACE_EVENT\(([^,)]*).*/trace_\1/'		\
+	--regex-c++='/^DEFINE_EVENT\([^,)]*, *([^,)]*).*/trace_\1/'	\
+	--regex-c++='/PAGEFLAG\(([^,)]*).*/Page\1/'			\
+	--regex-c++='/PAGEFLAG\(([^,)]*).*/SetPage\1/'			\
+	--regex-c++='/PAGEFLAG\(([^,)]*).*/ClearPage\1/'		\
+	--regex-c++='/TESTSETFLAG\(([^,)]*).*/TestSetPage\1/'		\
+	--regex-c++='/TESTPAGEFLAG\(([^,)]*).*/Page\1/'			\
+	--regex-c++='/SETPAGEFLAG\(([^,)]*).*/SetPage\1/'		\
+	--regex-c++='/__SETPAGEFLAG\(([^,)]*).*/__SetPage\1/'		\
+	--regex-c++='/TESTCLEARFLAG\(([^,)]*).*/TestClearPage\1/'	\
+	--regex-c++='/__TESTCLEARFLAG\(([^,)]*).*/TestClearPage\1/'	\
+	--regex-c++='/CLEARPAGEFLAG\(([^,)]*).*/ClearPage\1/'		\
+	--regex-c++='/__CLEARPAGEFLAG\(([^,)]*).*/__ClearPage\1/'	\
+	--regex-c++='/__PAGEFLAG\(([^,)]*).*/__SetPage\1/'		\
+	--regex-c++='/__PAGEFLAG\(([^,)]*).*/__ClearPage\1/'		\
+	--regex-c++='/PAGEFLAG_FALSE\(([^,)]*).*/Page\1/'		\
+	--regex-c++='/TESTSCFLAG\(([^,)]*).*/TestSetPage\1/'		\
+	--regex-c++='/TESTSCFLAG\(([^,)]*).*/TestClearPage\1/'		\
+	--regex-c++='/SETPAGEFLAG_NOOP\(([^,)]*).*/SetPage\1/'		\
+	--regex-c++='/CLEARPAGEFLAG_NOOP\(([^,)]*).*/ClearPage\1/'	\
+	--regex-c++='/__CLEARPAGEFLAG_NOOP\(([^,)]*).*/__ClearPage\1/'	\
+	--regex-c++='/TESTCLEARFLAG_FALSE\(([^,)]*).*/TestClearPage\1/' \
+	--regex-c++='/__TESTCLEARFLAG_FALSE\(([^,)]*).*/__TestClearPage\1/' \
+	--regex-c++='/_PE\(([^,)]*).*/PEVENT_ERRNO__\1/'		\
+	--regex-c='/PCI_OP_READ\(([a-z]*[a-z]).*[1-4]\)/pci_bus_read_config_\1/' \
+	--regex-c='/PCI_OP_WRITE\(([a-z]*[a-z]).*[1-4]\)/pci_bus_write_config_\1/'
+
+	all_kconfigs | xargs $1 -a                              \
+	--langdef=kconfig --language-force=kconfig              \
+	--regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'
+
+	all_kconfigs | xargs $1 -a                              \
+	--langdef=kconfig --language-force=kconfig              \
+	--regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/CONFIG_\2/'
+
+	all_defconfigs | xargs -r $1 -a                         \
+	--langdef=dotconfig --language-force=dotconfig          \
+	--regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'
+}
+
+emacs()
+{
+	all_sources | xargs $1 -a                               \
+	--regex='/^(ENTRY|_GLOBAL)(\([^)]*\)).*/\2/'            \
+	--regex='/^SYSCALL_DEFINE[0-9]?(\([^,)]*\).*/sys_\1/'   \
+	--regex='/^TRACE_EVENT(\([^,)]*\).*/trace_\1/'		\
+	--regex='/^DEFINE_EVENT([^,)]*, *\([^,)]*\).*/trace_\1/' \
+	--regex='/PAGEFLAG\(([^,)]*).*/Page\1/'			\
+	--regex='/PAGEFLAG\(([^,)]*).*/SetPage\1/'		\
+	--regex='/PAGEFLAG\(([^,)]*).*/ClearPage\1/'		\
+	--regex='/TESTSETFLAG\(([^,)]*).*/TestSetPage\1/'	\
+	--regex='/TESTPAGEFLAG\(([^,)]*).*/Page\1/'		\
+	--regex='/SETPAGEFLAG\(([^,)]*).*/SetPage\1/'		\
+	--regex='/__SETPAGEFLAG\(([^,)]*).*/__SetPage\1/'	\
+	--regex='/TESTCLEARFLAG\(([^,)]*).*/TestClearPage\1/'	\
+	--regex='/__TESTCLEARFLAG\(([^,)]*).*/TestClearPage\1/'	\
+	--regex='/CLEARPAGEFLAG\(([^,)]*).*/ClearPage\1/'	\
+	--regex='/__CLEARPAGEFLAG\(([^,)]*).*/__ClearPage\1/'	\
+	--regex='/__PAGEFLAG\(([^,)]*).*/__SetPage\1/'		\
+	--regex='/__PAGEFLAG\(([^,)]*).*/__ClearPage\1/'	\
+	--regex='/PAGEFLAG_FALSE\(([^,)]*).*/Page\1/'		\
+	--regex='/TESTSCFLAG\(([^,)]*).*/TestSetPage\1/'	\
+	--regex='/TESTSCFLAG\(([^,)]*).*/TestClearPage\1/'	\
+	--regex='/SETPAGEFLAG_NOOP\(([^,)]*).*/SetPage\1/'	\
+	--regex='/CLEARPAGEFLAG_NOOP\(([^,)]*).*/ClearPage\1/'	\
+	--regex='/__CLEARPAGEFLAG_NOOP\(([^,)]*).*/__ClearPage\1/' \
+	--regex='/TESTCLEARFLAG_FALSE\(([^,)]*).*/TestClearPage\1/' \
+	--regex='/__TESTCLEARFLAG_FALSE\(([^,)]*).*/__TestClearPage\1/' \
+	--regex='/_PE\(([^,)]*).*/PEVENT_ERRNO__\1/'		\
+	--regex='/PCI_OP_READ\(([a-z]*[a-z]).*[1-4]\)/pci_bus_read_config_\1/' \
+	--regex='/PCI_OP_WRITE\(([a-z]*[a-z]).*[1-4]\)/pci_bus_write_config_\1/'
+
+	all_kconfigs | xargs $1 -a                              \
+	--regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'
+
+	all_kconfigs | xargs $1 -a                              \
+	--regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/CONFIG_\3/'
+
+	all_defconfigs | xargs -r $1 -a                         \
+	--regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'
+}
+
+xtags()
+{
+	if $1 --version 2>&1 | grep -iq exuberant; then
+		exuberant $1
+	elif $1 --version 2>&1 | grep -iq emacs; then
+		emacs $1
+	else
+		all_sources | xargs $1 -a
+        fi
+}
+
+
+# Support um (which uses SUBARCH)
+if [ "${ARCH}" = "um" ]; then
+	if [ "$SUBARCH" = "i386" ]; then
+		archinclude=x86
+	elif [ "$SUBARCH" = "x86_64" ]; then
+		archinclude=x86
+	else
+		archinclude=${SUBARCH}
+	fi
+fi
+
+remove_structs=
+case "$1" in
+	"cscope")
+		docscope
+		;;
+
+	"gtags")
+		dogtags
+		;;
+
+	"tags")
+		rm -f tags
+		xtags ctags
+		remove_structs=y
+		;;
+
+	"TAGS")
+		rm -f TAGS
+		xtags etags
+		remove_structs=y
+		;;
+esac
+
+# Remove structure forward declarations.
+if [ -n "$remove_structs" ]; then
+    LANG=C sed -i -e '/^\([a-zA-Z_][a-zA-Z0-9_]*\)\t.*\t\/\^struct \1;.*\$\/;"\tx$/d' $1
+fi
-- 
1.7.10.4


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