auto-generate package/Config.in

The algorithm in package/pkgmaker works as follows:
1) for all package/*/Makefile
  a) parse PKG_NAME and PKG_SECTION
  b) skip if PKG_SECTION is 'kernel' (special ones)
  c) check if Config.in{,.lib,.manual} contain something
  d) fetch the first word of the first prompt from any result from c)
  e) fetch the verbose section name from package/SECTIONS.list based on
     PKG_SECTION, or just 'libs' if it's about Config.in.lib
  f) write results to package/package_section_list, in the form:
   '<Config.in prompt> <path to Config.in file> <verbose section name>'
2) sort package/package_section_list first by <verbose section name>,
   next by <Config.in prompt>
3) create package/Config.in.auto using the result from 2)

.gitignore

@@ -28,6 +28,7 @@ config/*.o
 config/lxdialog/*.o
 make.log
 dl/
+package/Config.in.auto
 package/*/info.mk
 package/*/Config.in
 package/*/Config.in.lib

Config.in

@@ -136,4 +136,25 @@ endchoice
 endmenu
 
 source "target/Config.in"
-source "package/Config.in"
+
+menu "Package selection"
+
+config ADK_ENABLE_IPV6
+	prompt "enable IPv6 globally"
+	boolean
+	default y
+	# FIXME: selecting stuff here is ugly, better fix package flavours to
+	#        support a symbol-value-based default (i.e., "default y if IPV6")
+	select ADK_PACKAGE_NFS_UTILS_WITH_TIRPC if ADK_PACKAGE_NFS_UTILS != n
+	help
+	  This enables IPv6 support in all related applications. Basically this
+	  just means passing --enable-ipv6 to the configure script, but the
+	  exception proves the rule. ;)
+
+source "package/Config.in.auto"
+endmenu
+
+menu "Kernel configuration"
+source "target/linux/Config.in"
+source "package/rtsp/Config.in"
+endmenu

package/SECTIONS.list

@@ -0,0 +1,52 @@
+admin System Administration
+archive Compression and Archivers
+base Base System
+bluetooth Bluetooth
+browser Browser / Editor / Pager
+editor Browser / Editor / Pager
+pager Browser / Editor / Pager
+chat IRC / ICQ / JABBER
+comp Computing
+console Console Utilities
+crypto Cryptography
+db Databases
+debug Debugging / Analyzing
+dns DNS / DHCP
+dhcp DNS / DHCP
+firewall Firewall / Routing / Bridging
+route Firewall / Routing / Bridging
+bridge Firewall / Routing / Bridging
+fs Filesystem / Blockdevice utilities
+ipv6 IPv6
+lang Programming Languages
+libs Libraries
+mail Mail
+misc Misc
+multimedia Multimedia
+net Networking
+net/fs Network Filesystems
+net/misc Networking Misc
+net/security Network Security
+none Unclassified
+ntp NTP
+p2p P2P
+phone Telephony
+ppp PPP / PPTP / RADIUS
+proxy Proxy
+scm SCM
+serial Serial communications & terminal emulation
+shells Shells
+sound Sound
+sys System
+text Text
+utils Utilities
+video Video
+web World Wide Web
+www HTTP / FTP
+wifi Wireless
+x11 Xorg
+x11/apps X applications
+x11/drivers X server and drivers
+x11/server X server and drivers
+x11/libs X libraries
+x11/fonts X fonts

package/pkgmaker

@@ -71,7 +71,7 @@ for dn in */Makefile; do
 	typeset -u dnu=${dn//-/_}
 	dnu=${dnu//+/X}
 
-	(	# fd 4 = Config.in; fd 5 = Config.in.lib
+	(	# fd 4 = Config.in; fd 5 = Config.in.lib; fd 6 = Config.in.kmod
 	g5=0
 
 	# Handle master package (directory)
@@ -264,3 +264,79 @@ EOF
 	) 4>Config.in 5>Config.in.lib 6>Config.in.kmod
 	cd ..
 done
+
+# return good if given file exists and is non-empty
+function non_empty_file() {
+	[[ -f "$1" ]] || return 1
+	[[ -n "$(cat "$1")" ]] || return 1
+	return 0
+}
+
+# print the verbose section name for a given section tag
+function lookup_section_string() {
+	str="$(grep ^$1\  SECTIONS.list | cut -d ' ' -f '2-')"
+	[[ -n $str ]] && { echo $str; return; }
+	echo $1
+}
+
+# print the first prompt's first word's value in a given Config.in file
+function get_first_prompt() {
+	prompt="$(grep -m 1 "prompt " $1 | sed -n 's/.*"\([^ \.]*\)[ \.].*"/\1/p')"
+	[[ -n $prompt ]] && echo $prompt
+}
+
+# collect packages along with their section and
+# create a list of '<name> <path to config.in> <section string>' for later sorting
+rm -f package_section_list
+for dn in */Makefile; do
+	dn=${dn%/*}
+	pbar="Pass 3: $dn ..."
+	print -nu2 "$pbar\r"
+
+	cd $dn
+	eval $($GMAKE dump="PKG_NAME PKG_SECTION")
+	cd ..
+
+	# ignore section kernel, these are included inside target/config
+	[[ $PKG_SECTION = kernel ]] && continue
+
+	PKG_SECTION=${PKG_SECTION:-none}
+
+	has_config_in=false
+	if non_empty_file $dn/Config.in; then
+		prompt="$(get_first_prompt $dn/Config.in)"
+		prompt="${prompt:-$PKG_NAME}"
+		echo "$prompt $dn/Config.in $(lookup_section_string $PKG_SECTION)"
+		has_config_in=true
+	fi
+	if non_empty_file $dn/Config.in.lib; then
+		prompt="$(get_first_prompt $dn/Config.in.lib)"
+		prompt="${prompt:-$PKG_NAME}"
+		echo "$prompt $dn/Config.in.lib $(lookup_section_string libs)"
+		has_config_in=true
+	fi
+	if non_empty_file $dn/Config.in.manual; then
+		prompt="$(get_first_prompt $dn/Config.in.manual)"
+		prompt="${prompt:-$PKG_NAME}"
+		echo "$prompt $dn/Config.in.manual $(lookup_section_string $PKG_SECTION)"
+		has_config_in=true
+	fi
+	$has_config_in || print -u2 "$dn: No Config.in file found?!"
+done >package_section_list
+
+# create the Config.in.auto from the sorted list from above
+cursec=""
+sort -k 3 -k 1 -f package_section_list | while read name file section; do
+	pbar="Pass 4: $name ..."
+	print -nu2 "$pbar\r"
+
+	if [[ $cursec != $section ]]; then
+		[[ -n $cursec ]] && print "endmenu\n"
+
+		print "menu \"$section\""
+		cursec="$section"
+	fi
+	print "source \"package/$file\""
+done >Config.in.auto
+print "endmenu\n" >>Config.in.auto
+rm -f package_section_list