make it possible to keep Config/Kbuild snippets in *.c files

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

8 files changed, 325 insertions, 258 deletions

diff --git a/Makefile b/Makefile
index 1481f0100..da8f7d7b6 100644
--- a/Makefile
+++ b/Makefile
@@ -377,6 +377,11 @@ ifneq ($(KBUILD_SRC),)
             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 endif
 
+# This target generates Kbuild's and Config.in's from *.c files
+PHONY += gen_build_files
+gen_build_files:
+        $(Q)$(srctree)/scripts/gen_build_files.sh $(srctree) $(objtree)
+
 # To make sure we do not include .config for any of the *config targets
 # catch them early, and hand them over to scripts/kconfig/Makefile
 # It is allowed to specify more targets when calling make, including
@@ -428,7 +433,7 @@ ifeq ($(config-targets),1)
 -include $(srctree)/arch/$(ARCH)/Makefile
 export KBUILD_DEFCONFIG
 
-config %config: scripts_basic outputmakefile FORCE
+config %config: scripts_basic outputmakefile gen_build_files FORCE
         $(Q)mkdir -p include
         $(Q)$(MAKE) $(build)=scripts/kconfig $@
         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
@@ -443,7 +448,7 @@ ifeq ($(KBUILD_EXTMOD),)
 # Carefully list dependencies so we do not try to build scripts twice
 # in parrallel
 PHONY += scripts
-scripts: scripts_basic include/config/MARKER
+scripts: gen_build_files scripts_basic include/config/MARKER
         $(Q)$(MAKE) $(build)=$(@)
 
 scripts_basic: include/autoconf.h
diff --git a/findutils/Config.in b/findutils/Config.in
deleted file mode 100644
index 8582d6446..000000000
--- a/findutils/Config.in
+++ /dev/null
@@ -1,253 +0,0 @@
-#
-# For a description of the syntax of this configuration file,
-# see scripts/kbuild/config-language.txt.
-#
-
-menu "Finding Utilities"
-
-config FIND
-        bool "find"
-        default n
-        help
-          find is used to search your system to find specified files.
-
-config FEATURE_FIND_PRINT0
-        bool "Enable -print0: NUL-terminated output"
-        default y
-        depends on FIND
-        help
-          Causes output names to be separated by a NUL character
-          rather than a newline. This allows names that contain
-          newlines and other whitespace to be more easily
-          interpreted by other programs.
-
-config FEATURE_FIND_MTIME
-        bool "Enable -mtime: modified time matching"
-        default y
-        depends on FIND
-        help
-          Allow searching based on the modification time of
-          files, in days.
-
-config FEATURE_FIND_MMIN
-        bool "Enable -mmin: modified time matching by minutes"
-        default y
-        depends on FIND
-        help
-          Allow searching based on the modification time of
-          files, in minutes.
-
-config FEATURE_FIND_PERM
-        bool "Enable -perm: permissions matching"
-        default y
-        depends on FIND
-        help
-          Enable searching based on file permissions.
-
-config FEATURE_FIND_TYPE
-        bool "Enable -type: file type matching (file/dir/link/...)"
-        default y
-        depends on FIND
-        help
-          Enable searching based on file type (file,
-          directory, socket, device, etc.).
-
-config FEATURE_FIND_XDEV
-        bool "Enable -xdev: 'stay in filesystem'"
-        default y
-        depends on FIND
-        help
-          This option allows find to restrict searches to a single filesystem.
-
-config FEATURE_FIND_MAXDEPTH
-        bool "Enable -maxdepth N"
-        default y
-        depends on FIND
-        help
-          This option enables -maxdepth N option.
-
-config FEATURE_FIND_NEWER
-        bool "Enable -newer: compare file modification times"
-        default y
-        depends on FIND
-        help
-          Support the 'find -newer' option for finding any files which have
-          a modified time that is more recent than the specified FILE.
-
-config FEATURE_FIND_INUM
-        bool "Enable -inum: inode number matching"
-        default y
-        depends on FIND
-        help
-          Support the 'find -inum' option for searching by inode number.
-
-config FEATURE_FIND_EXEC
-        bool "Enable -exec: execute commands"
-        default y
-        depends on FIND
-        help
-          Support the 'find -exec' option for executing commands based upon
-          the files matched.
-
-config FEATURE_FIND_USER
-        bool "Enable -user: username/uid matching"
-        default y
-        depends on FIND
-        help
-          Support the 'find -user' option for searching by username or uid.
-
-config FEATURE_FIND_GROUP
-        bool "Enable -group: group/gid matching"
-        default y
-        depends on FIND
-        help
-          Support the 'find -group' option for searching by group name or gid.
-
-config FEATURE_FIND_NOT
-        bool "Enable the 'not' (!) operator"
-        default y
-        depends on FIND
-        help
-          Support the '!' operator to invert the test results.
-          If 'Enable full-blown desktop' is enabled, then will also support
-          the non-POSIX notation '-not'.
-
-config FEATURE_FIND_DEPTH
-        bool "Enable -depth"
-        default y
-        depends on FIND
-        help
-          Process each directory's contents before the directory itself.
-
-config FEATURE_FIND_PAREN
-        bool "Enable parens in options"
-        default y
-        depends on FIND
-        help
-          Enable usage of parens '(' to specify logical order of arguments.
-
-config FEATURE_FIND_SIZE
-        bool "Enable -size: file size matching"
-        default y
-        depends on FIND
-        help
-          Support the 'find -size' option for searching by file size.
-
-config FEATURE_FIND_PRUNE
-        bool "Enable -prune: exclude subdirectories"
-        default y
-        depends on FIND
-        help
-          If the file is a directory, dont descend into it. Useful for
-          exclusion .svn and CVS directories.
-
-config FEATURE_FIND_DELETE
-        bool "Enable -delete: delete files/dirs"
-        default n
-        depends on FIND && FEATURE_FIND_DEPTH
-        help
-          Support the 'find -delete' option for deleting files and directories.
-          WARNING: This option can do much harm if used wrong. Busybox will not
-          try to protect the user from doing stupid things. Use with care.
-
-config FEATURE_FIND_PATH
-        bool "Enable -path: match pathname with shell pattern"
-        default y
-        depends on FIND
-        help
-          The -path option matches whole pathname instead of just filename.
-
-config FEATURE_FIND_REGEX
-        bool "Enable -regex: match pathname with regex"
-        default y
-        depends on FIND
-        help
-          The -regex option matches whole pathname against regular expression.
-
-config FEATURE_FIND_CONTEXT
-        bool "Enable -context: security context matching"
-        default n
-        depends on FIND && SELINUX
-        help
-          Support the 'find -context' option for matching security context.
-
-config FEATURE_FIND_LINKS
-        bool "Enable -links: link count matching"
-        default n
-        depends on FIND
-        help
-          Support the 'find -links' option for matching number of links.
-
-config GREP
-        bool "grep"
-        default n
-        help
-          grep is used to search files for a specified pattern.
-
-config FEATURE_GREP_EGREP_ALIAS
-        bool "Enable extended regular expressions (egrep & grep -E)"
-        default y
-        depends on GREP
-        help
-          Enabled support for extended regular expressions. Extended
-          regular expressions allow for alternation (foo|bar), grouping,
-          and various repetition operators.
-
-config FEATURE_GREP_FGREP_ALIAS
-        bool "Alias fgrep to grep -F"
-        default y
-        depends on GREP
-        help
-          fgrep sees the search pattern as a normal string rather than
-          regular expressions.
-          grep -F always works, this just creates the fgrep alias.
-
-config FEATURE_GREP_CONTEXT
-        bool "Enable before and after context flags (-A, -B and -C)"
-        default y
-        depends on GREP
-        help
-          Print the specified number of leading (-B) and/or trailing (-A)
-          context surrounding our matching lines.
-          Print the specified number of context lines (-C).
-
-config XARGS
-        bool "xargs"
-        default n
-        help
-          xargs is used to execute a specified command for
-          every item from standard input.
-
-config FEATURE_XARGS_SUPPORT_CONFIRMATION
-        bool "Enable -p: prompt and confirmation"
-        default n
-        depends on XARGS
-        help
-          Support -p: prompt the user whether to run each command
-          line and read a line from the terminal.
-
-config FEATURE_XARGS_SUPPORT_QUOTES
-        bool "Enable single and double quotes and backslash"
-        default n
-        depends on XARGS
-        help
-          Support quoting in the input.
-
-config FEATURE_XARGS_SUPPORT_TERMOPT
-        bool "Enable -x: exit if -s or -n is exceeded"
-        default n
-        depends on XARGS
-        help
-          Support -x: exit if the command size (see the -s or -n option)
-          is exceeded.
-
-config FEATURE_XARGS_SUPPORT_ZERO_TERM
-        bool "Enable -0: NUL-terminated input"
-        default n
-        depends on XARGS
-        help
-          Support -0: input items are terminated by a NUL character
-          instead of whitespace, and the quotes and backslash
-          are not special.
-
-endmenu
diff --git a/findutils/Config.src b/findutils/Config.src
new file mode 100644
index 000000000..9ee71a845
--- /dev/null
+++ b/findutils/Config.src
@@ -0,0 +1,10 @@
+#
+# For a description of the syntax of this configuration file,
+# see scripts/kbuild/config-language.txt.
+#
+
+menu "Finding Utilities"
+
+INSERT
+
+endmenu
diff --git a/findutils/Kbuild b/findutils/Kbuild.src
index 7b504bacf..771789ff5 100644
--- a/findutils/Kbuild
+++ b/findutils/Kbuild.src
@@ -5,6 +5,5 @@
 # Licensed under the GPL v2, see the file LICENSE in this tarball.
 
 lib-y:=
-lib-$(CONFIG_FIND)      += find.o
-lib-$(CONFIG_GREP)      += grep.o
-lib-$(CONFIG_XARGS)     += xargs.o
+
+INSERT
diff --git a/findutils/find.c b/findutils/find.c
index 30fb03dd1..9022867a2 100644
--- a/findutils/find.c
+++ b/findutils/find.c
@@ -53,6 +53,181 @@
  * diff -u /tmp/std_find /tmp/bb_find && echo Identical
  */
 
+//kbuild:lib-$(CONFIG_FIND) += find.o
+//config:
+//config:config FIND
+//config:       bool "find"
+//config:       default n
+//config:       help
+//config:         find is used to search your system to find specified files.
+//config:
+//config:config FEATURE_FIND_PRINT0
+//config:       bool "Enable -print0: NUL-terminated output"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         Causes output names to be separated by a NUL character
+//config:         rather than a newline. This allows names that contain
+//config:         newlines and other whitespace to be more easily
+//config:         interpreted by other programs.
+//config:
+//config:config FEATURE_FIND_MTIME
+//config:       bool "Enable -mtime: modified time matching"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         Allow searching based on the modification time of
+//config:         files, in days.
+//config:
+//config:config FEATURE_FIND_MMIN
+//config:       bool "Enable -mmin: modified time matching by minutes"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         Allow searching based on the modification time of
+//config:         files, in minutes.
+//config:
+//config:config FEATURE_FIND_PERM
+//config:       bool "Enable -perm: permissions matching"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         Enable searching based on file permissions.
+//config:
+//config:config FEATURE_FIND_TYPE
+//config:       bool "Enable -type: file type matching (file/dir/link/...)"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         Enable searching based on file type (file,
+//config:         directory, socket, device, etc.).
+//config:
+//config:config FEATURE_FIND_XDEV
+//config:       bool "Enable -xdev: 'stay in filesystem'"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         This option allows find to restrict searches to a single filesystem.
+//config:
+//config:config FEATURE_FIND_MAXDEPTH
+//config:       bool "Enable -maxdepth N"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         This option enables -maxdepth N option.
+//config:
+//config:config FEATURE_FIND_NEWER
+//config:       bool "Enable -newer: compare file modification times"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         Support the 'find -newer' option for finding any files which have
+//config:         a modified time that is more recent than the specified FILE.
+//config:
+//config:config FEATURE_FIND_INUM
+//config:       bool "Enable -inum: inode number matching"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         Support the 'find -inum' option for searching by inode number.
+//config:
+//config:config FEATURE_FIND_EXEC
+//config:       bool "Enable -exec: execute commands"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         Support the 'find -exec' option for executing commands based upon
+//config:         the files matched.
+//config:
+//config:config FEATURE_FIND_USER
+//config:       bool "Enable -user: username/uid matching"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         Support the 'find -user' option for searching by username or uid.
+//config:
+//config:config FEATURE_FIND_GROUP
+//config:       bool "Enable -group: group/gid matching"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         Support the 'find -group' option for searching by group name or gid.
+//config:
+//config:config FEATURE_FIND_NOT
+//config:       bool "Enable the 'not' (!) operator"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         Support the '!' operator to invert the test results.
+//config:         If 'Enable full-blown desktop' is enabled, then will also support
+//config:         the non-POSIX notation '-not'.
+//config:
+//config:config FEATURE_FIND_DEPTH
+//config:       bool "Enable -depth"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         Process each directory's contents before the directory itself.
+//config:
+//config:config FEATURE_FIND_PAREN
+//config:       bool "Enable parens in options"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         Enable usage of parens '(' to specify logical order of arguments.
+//config:
+//config:config FEATURE_FIND_SIZE
+//config:       bool "Enable -size: file size matching"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         Support the 'find -size' option for searching by file size.
+//config:
+//config:config FEATURE_FIND_PRUNE
+//config:       bool "Enable -prune: exclude subdirectories"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         If the file is a directory, dont descend into it. Useful for
+//config:         exclusion .svn and CVS directories.
+//config:
+//config:config FEATURE_FIND_DELETE
+//config:       bool "Enable -delete: delete files/dirs"
+//config:       default n
+//config:       depends on FIND && FEATURE_FIND_DEPTH
+//config:       help
+//config:         Support the 'find -delete' option for deleting files and directories.
+//config:         WARNING: This option can do much harm if used wrong. Busybox will not
+//config:         try to protect the user from doing stupid things. Use with care.
+//config:
+//config:config FEATURE_FIND_PATH
+//config:       bool "Enable -path: match pathname with shell pattern"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         The -path option matches whole pathname instead of just filename.
+//config:
+//config:config FEATURE_FIND_REGEX
+//config:       bool "Enable -regex: match pathname with regex"
+//config:       default y
+//config:       depends on FIND
+//config:       help
+//config:         The -regex option matches whole pathname against regular expression.
+//config:
+//config:config FEATURE_FIND_CONTEXT
+//config:       bool "Enable -context: security context matching"
+//config:       default n
+//config:       depends on FIND && SELINUX
+//config:       help
+//config:         Support the 'find -context' option for matching security context.
+//config:
+//config:config FEATURE_FIND_LINKS
+//config:       bool "Enable -links: link count matching"
+//config:       default n
+//config:       depends on FIND
+//config:       help
+//config:         Support the 'find -links' option for matching number of links.
+
 #include <fnmatch.h>
 #include "libbb.h"
 #if ENABLE_FEATURE_FIND_REGEX
diff --git a/findutils/grep.c b/findutils/grep.c
index 0f1c11abb..be290118f 100644
--- a/findutils/grep.c
+++ b/findutils/grep.c
@@ -19,6 +19,41 @@
  * (C) 2006 Jac Goudsmit added -o option
  */
 
+//kbuild:lib-$(CONFIG_GREP) += grep.o
+//config:
+//config:config GREP
+//config:       bool "grep"
+//config:       default n
+//config:       help
+//config:         grep is used to search files for a specified pattern.
+//config:
+//config:config FEATURE_GREP_EGREP_ALIAS
+//config:       bool "Enable extended regular expressions (egrep & grep -E)"
+//config:       default y
+//config:       depends on GREP
+//config:       help
+//config:         Enabled support for extended regular expressions. Extended
+//config:         regular expressions allow for alternation (foo|bar), grouping,
+//config:         and various repetition operators.
+//config:
+//config:config FEATURE_GREP_FGREP_ALIAS
+//config:       bool "Alias fgrep to grep -F"
+//config:       default y
+//config:       depends on GREP
+//config:       help
+//config:         fgrep sees the search pattern as a normal string rather than
+//config:         regular expressions.
+//config:         grep -F always works, this just creates the fgrep alias.
+//config:
+//config:config FEATURE_GREP_CONTEXT
+//config:       bool "Enable before and after context flags (-A, -B and -C)"
+//config:       default y
+//config:       depends on GREP
+//config:       help
+//config:         Print the specified number of leading (-B) and/or trailing (-A)
+//config:         context surrounding our matching lines.
+//config:         Print the specified number of context lines (-C).
+
 #include "libbb.h"
 #include "xregex.h"
 
diff --git a/findutils/xargs.c b/findutils/xargs.c
index 3785f1ec0..c55ac5724 100644
--- a/findutils/xargs.c
+++ b/findutils/xargs.c
@@ -17,6 +17,47 @@
  *
  */
 
+//kbuild:lib-$(CONFIG_XARGS) += xargs.o
+//config:
+//config:config XARGS
+//config:       bool "xargs"
+//config:       default n
+//config:       help
+//config:         xargs is used to execute a specified command for
+//config:         every item from standard input.
+//config:
+//config:config FEATURE_XARGS_SUPPORT_CONFIRMATION
+//config:       bool "Enable -p: prompt and confirmation"
+//config:       default n
+//config:       depends on XARGS
+//config:       help
+//config:         Support -p: prompt the user whether to run each command
+//config:         line and read a line from the terminal.
+//config:
+//config:config FEATURE_XARGS_SUPPORT_QUOTES
+//config:       bool "Enable single and double quotes and backslash"
+//config:       default n
+//config:       depends on XARGS
+//config:       help
+//config:         Support quoting in the input.
+//config:
+//config:config FEATURE_XARGS_SUPPORT_TERMOPT
+//config:       bool "Enable -x: exit if -s or -n is exceeded"
+//config:       default n
+//config:       depends on XARGS
+//config:       help
+//config:         Support -x: exit if the command size (see the -s or -n option)
+//config:         is exceeded.
+//config:
+//config:config FEATURE_XARGS_SUPPORT_ZERO_TERM
+//config:       bool "Enable -0: NUL-terminated input"
+//config:       default n
+//config:       depends on XARGS
+//config:       help
+//config:         Support -0: input items are terminated by a NUL character
+//config:         instead of whitespace, and the quotes and backslash
+//config:         are not special.
+
 #include "libbb.h"
 
 /* This is a NOEXEC applet. Be very careful! */
diff --git a/scripts/gen_build_files.sh b/scripts/gen_build_files.sh
new file mode 100644
index 000000000..300d90c2a
--- /dev/null
+++ b/scripts/gen_build_files.sh
@@ -0,0 +1,55 @@
+#!/bin/sh
+
+test $# -ge 2 || exit 1
+
+# cd to objtree
+cd "$2" || exit 1
+
+srctree="$1"
+
+find -type d \
+| while read; do
+    d="$REPLY"
+
+    src="$srctree/$d/Kbuild.src"
+    dst="$d/Kbuild"
+    if test -f "$src"; then
+        echo "  CHK     $dst"
+
+        s=`grep -h '^//kbuild:' "$srctree/$d"/*.c | sed 's^//kbuild:^^'`
+        while read; do
+            test x"$REPLY" = x"INSERT" && REPLY="$s"
+            printf "%s\n" "$REPLY"
+        done <"$src" >"$dst.$$.tmp"
+
+        if test -f "$dst" && cmp -s "$dst.$$.tmp" "$dst"; then
+            rm "$dst.$$.tmp"
+        else
+            echo "  GEN     $dst"
+            mv "$dst.$$.tmp" "$dst"
+        fi
+    fi
+
+    src="$srctree/$d/Config.src"
+    dst="$d/Config.in"
+    if test -f "$src"; then
+        echo "  CHK     $dst"
+
+        s=`grep -h '^//config:' "$srctree/$d"/*.c | sed 's^//config:^^'`
+        while read; do
+            test x"$REPLY" = x"INSERT" && REPLY="$s"
+            printf "%s\n" "$REPLY"
+        done <"$src" >"$dst.$$.tmp"
+
+        if test -f "$dst" && cmp -s "$dst.$$.tmp" "$dst"; then
+            rm "$dst.$$.tmp"
+        else
+            echo "  GEN     $dst"
+            mv "$dst.$$.tmp" "$dst"
+        fi
+    fi
+
+done
+
+# Last read failed. This is normal. Don't exit with its error code:
+exit 0