test-based ramdisk size for live squashfs images

Implementation based on m-p-d::profiles/scripts.d/03-syslinux
(but heavily modified for m-p of course)

doc/assumptions.txt

@@ -15,3 +15,13 @@
   + если добавить какой-либо kernel-image в STAGE1_PACKAGES*,
     результат может быть неожиданным
   + вероятная ошибка: незагрузка полученного squashfs
+
+- features.in/install2/install2/stage2cfg.mk
+- features.in/live/live/stage2cfg.mk
+- features.in/rescue/rescue/stage2cfg.mk
+- features.in/syslinux/cfg.in/15live.cfg
+- features.in/syslinux/cfg.in/20install2.cfg
+- features.in/syslinux/cfg.in/80rescue.cfg
+- features.in/syslinux/scripts.d/20-propagator-ramdisk
+  + ожидают, что названия squashfs-образов второй стадии инсталятора,
+    livecd и спасательной системы соответственно altinst, live и rescue

features.in/Makefile

@@ -32,6 +32,19 @@ all:
 				fi; \
 			fi; \
 		done; \
+		for scripts in scripts.d image-scripts.d; do \
+			if test -d "$(BUILDDIR)/$$scripts" -a \
+				-d "$$dir/$$scripts"; then \
+				if rsync -qab "$$dir/$$scripts/" \
+					"$(BUILDDIR)/$$scripts/"; then \
+					type -t git >&/dev/null && \
+					pushd "$(BUILDDIR)/$$scripts/" && \
+					git add . && \
+					git commit -qam "$$dir feature (toplevel $$scripts)" ||:; \
+					popd; \
+				fi; \
+			fi; \
+		done; \
 		if test -x "$$dir/generate.sh"; then \
 			pushd "$$dir" && \
 			sh generate.sh; \

features.in/syslinux/cfg.in/15live.cfg

@@ -1,5 +1,4 @@
 label live
   menu label ^LiveCD (no hard disk needed)
   kernel alt0/vmlinuz
-  append initrd=alt0/full.cz live ramdisk_size=72000 fastboot stagename=live showopts automatic=method:cdrom
-  ### FIXME: see m-p-d::profiles/scripts.d/03-syslinux
+  append initrd=alt0/full.cz live ramdisk_size=@live_size@ fastboot stagename=live showopts automatic=method:cdrom

features.in/syslinux/cfg.in/20install2.cfg

@@ -1,8 +1,8 @@
 label linux
   menu label ^Install ALT Linux
   kernel alt0/vmlinuz
-  append initrd=alt0/full.cz changedisk vga=0x314 quiet=1 showopts automatic=method:cdrom
+  append initrd=alt0/full.cz ramdisk_size=@altinst_size@ changedisk vga=0x314 quiet=1 showopts automatic=method:cdrom
 label noapic
   menu label ^Failsafe install
   kernel alt0/vmlinuz
-  append initrd=alt0/full.cz changedisk showopts nolapic noapic
+  append initrd=alt0/full.cz ramdisk_size=@altinst_size@ changedisk showopts nolapic noapic

features.in/syslinux/cfg.in/80rescue.cfg

@@ -1,5 +1,4 @@
 label rescue
   menu label ^Rescue LiveCD
   kernel alt0/vmlinuz
-  append initrd=alt0/full.cz live ramdisk_size=72000 fastboot stagename=rescue showopts automatic=method:cdrom
-  ### FIXME: see m-p-d::profiles/scripts.d/03-syslinux
+  append initrd=alt0/full.cz live ramdisk_size=@rescue_size@ fastboot stagename=rescue showopts automatic=method:cdrom

features.in/syslinux/scripts.d/20-propagator-ramdisk

@@ -0,0 +1,13 @@
+#!/bin/sh -x
+# postprocess isolinux configuration
+# when the image sizes are finally known
+
+cd "$WORKDIR"
+
+# apply size census while looking for potential squashfs images
+find -maxdepth 1 -type f -size +1M \
+| sed 's,^\./,,' \
+| while read image; do
+	size="$[ $(stat -c%s "$image") / 1024 + 1 ]"
+	sed -i "s,@${image}_size@,$size," syslinux/*.cfg
+done

features.in/syslinux/stage1/scripts.d/01-syslinux

@@ -34,3 +34,6 @@ grep -hv '^#' .in/[0-9][0-9]*.cfg > "$BOOTLOADER.cfg"
 
 # snippets are not going into the actual image
 if test "$DEBUG" != 2; then rm -r .in/; fi
+
+# NB: there will be final macro expansion based on actual image sizes
+#     (done by ../../scripts.d/10-propagator-ramdisk)