initrd-bootchain: allow overriding variables in bootchain config

features.in/initrd-bootchain/README

@@ -5,3 +5,10 @@ bootchain. Это альтернатива фичи initrd-propagator. Испо
 Документацию по использованию bootchain следует смотреть в пакетах
 make-initrd-bootchain-*:
 /usr/share/make-initrd/features/bootchain-*/README.md
+
+Конфиг находится в stage1/files/bootchain. Почти все переменные можно
+переопределить. Переменные в m-p по сравнению с конфигом bootchain
+имеют приставку 'BOOTCHAIN_'. Дефолты заданы в config.mk
+Переопределить можно так:
+
+  $(call set,BOOTCHAIN_OEM_WELCOME_TEXT,Welcome to my OS!)

features.in/initrd-bootchain/config.mk

@@ -5,3 +5,17 @@ use/initrd-bootchain: use/uuid-iso
 	@$(call set,STAGE1_INITRD_TYPEARGS,$(shell echo "root=bootchain bootchain=fg,altboot automatic"))
 	@$(call set,STAGE1_INITRD_BOOTMETHOD,$(shell echo "method:cdrom,uuid:$(UUID_ISO)"))
 	@$(call set,STAGE1_INITRD_STAGE2_OPTION,stagename)
+	@$(call try,BOOTCHAIN_BC_FGVT_ACTIVATE,7)
+	@$(call try,BOOTCHAIN_WAITDEV_TIMEOUT,)
+	@$(call try,BOOTCHAIN_OEM_WELCOME_TEXT,Welcome to ALT!)
+	@$(call try,BOOTCHAIN_OEM_CDROOT,/image)
+	@$(call try,BOOTCHAIN_OEM_DEFAULT_STAGE2,altinst)
+	@$(call try,BOOTCHAIN_OEM_LIVE_STORAGE,alt-live-storage)
+	@$(call try,BOOTCHAIN_OEM_BAD_STORAGE,alt-slow-storage)
+	@$(call try,BOOTCHAIN_OEM_SETUP_STORAGE,alt-drivers-update)
+	@$(call try,BOOTCHAIN_OEM_IMAGES_BASE,/tmp/images)
+	@$(call try,BOOTCHAIN_OEM_OVERLAYS_DIR,/tmp/overlays)
+	@$(call try,BOOTCHAIN_OEM_URL_NETINST,/pub/netinst/current)
+	@$(call try,BOOTCHAIN_OEM_SRV_NETINST,)
+	@$(call try,BOOTCHAIN_OEM_NFS_NETINST,/srv/public/netinst)
+	@$(call try,BOOTCHAIN_OEM_CIFS_NETINST,/netinst)

features.in/initrd-bootchain/generate.mk

-# set up livecd browser redirection page
+# set up initrd-bootchain config
 
 ifdef BUILDDIR
 
@@ -7,16 +7,28 @@ include $(BUILDDIR)/distcfg.mk
 BOOTCHAIN_CFG := $(BUILDDIR)/stage1/files/bootchain
 
 all: debug
-	@if [ -n "$(META_VOL_ID)" ]; then \
+	@[ -s "$(BOOTCHAIN_CFG)" ] || exit 1; \
+	if [ -n "$(META_VOL_ID)" ]; then \
 		DISTRO="$(META_VOL_ID)"; \
 	else \
 		DISTRO="$(RELNAME)"; \
 	fi; \
-	if [ -s "$(BOOTCHAIN_CFG)" ]; then \
-		sed -i \
-			-e "s,@distro@,$$DISTRO," \
-			$(BOOTCHAIN_CFG); \
-	fi
+	sed -i -e "s,@distro@,$$DISTRO," \
+		-e "s,@bc_fgvt_activate@,$(BOOTCHAIN_BC_FGVT_ACTIVATE)," \
+		-e "s,@waitdev_timeout@,$(BOOTCHAIN_WAITDEV_TIMEOUT)," \
+		-e "s,@oem_welcome_text@,$(BOOTCHAIN_OEM_WELCOME_TEXT)," \
+		-e "s,@oem_cdroot@,$(BOOTCHAIN_OEM_CDROOT)," \
+		-e "s,@oem_default_stage2@,$(BOOTCHAIN_OEM_DEFAULT_STAGE2)," \
+		-e "s,@oem_live_storage@,$(BOOTCHAIN_OEM_LIVE_STORAGE)," \
+		-e "s,@oem_bad_storage@,$(BOOTCHAIN_OEM_BAD_STORAGE)," \
+		-e "s,@oem_setup_storage@,$(BOOTCHAIN_OEM_SETUP_STORAGE)," \
+		-e "s,@oem_images_base@,$(BOOTCHAIN_OEM_IMAGES_BASE)," \
+		-e "s,@oem_overlays_dir@,$(BOOTCHAIN_OEM_OVERLAYS_DIR)," \
+		-e "s,@oem_url_netinst@,$(BOOTCHAIN_OEM_URL_NETINST)," \
+		-e "s,@oem_srv_netinst@,$(BOOTCHAIN_OEM_SRV_NETINST)," \
+		-e "s,@oem_nfs_netinst@,$(BOOTCHAIN_OEM_NFS_NETINST)," \
+		-e "s,@oem_cifs_netinst@,$(BOOTCHAIN_OEM_CIFS_NETINST)," \
+		$(BOOTCHAIN_CFG)
 
 debug:
 	@if [ -n "$(DEBUG)" ]; then \

features.in/initrd-bootchain/stage1/files/bootchain

-# /etc/sysconfig/bootchain example
+# /etc/sysconfig/bootchain
 
 #############################
 # Bootchain defaults        #
@@ -11,15 +11,14 @@
 # BC_LOG_VT=3
 
 # Delay in seconds before auto-activate interactive VT, empty value for switch immediately
-# BC_FGVT_ACTIVATE=7
+BC_FGVT_ACTIVATE=@bc_fgvt_activate@
 
 # Full path to the bootchain log or character special device name
 # BC_LOGFILE=/var/log/bootchained.log
 
 # Common timeout in seconds for all waitdev steps:
 # this make possible using fallback after last waitdev step
-#
-# WAITDEV_TIMEOUT=
+WAITDEV_TIMEOUT=@waitdev_timeout@
 
 
 #############################
@@ -38,42 +37,42 @@
 #############################
 
 # altboot back title
-OEM_WELCOME_TEXT="Welcome to ALT!"
+OEM_WELCOME_TEXT="@oem_welcome_text@"
 
 # Distribution name, for example
 OEM_DISTRIBUTION="@distro@"
 
 # ISO-image mount point (required for ALT)
-OEM_CDROOT=/image
+OEM_CDROOT=@oem_cdroot@
 
 # Default stage2 filename for boot from ISO-9660
-OEM_DEFAULT_STAGE2=altinst
+OEM_DEFAULT_STAGE2=@oem_default_stage2@
 
 # Persistent storage device LABEL for Live-RW sessions
-OEM_LIVE_STORAGE=alt-live-storage
+OEM_LIVE_STORAGE=@oem_live_storage@
 
 # Live storage device LABEL for mark non-usable devices
-OEM_BAD_STORAGE=alt-slow-storage
+OEM_BAD_STORAGE=@oem_bad_storage@
 
 # Local storage device LABEL with the OEM drivers update
-OEM_SETUP_STORAGE=alt-drivers-update
+OEM_SETUP_STORAGE=@oem_setup_storage@
 
 # Mount point inside stage2 for read additional images
-# OEM_IMAGES_BASE=/tmp/images
+OEM_IMAGES_BASE=@oem_images_base@
 
 # Directory inside stage2 for mount images as LiveCD slices
-# OEM_OVERLAYS_DIR=/tmp/overlays
+OEM_OVERLAYS_DIR=@oem_overlays_dir@
 
 # HTTP and FTP default base directory for netinstall
 # (if empty "/pub/netinst/current" path will be used)
-# OEM_URL_NETINST=/pub/distributions/ALTLinux/p10/images
+OEM_URL_NETINST=@oem_url_netinst@
 
 # HTTP and FTP default server name or IP-address for netinstall
 # (if empty near gateway will be used)
-# OEM_SRV_NETINST=ftp.altlinux.org
+OEM_SRV_NETINST=@oem_srv_netinst@
 
 # NFS path with overlays-live sub-directory, containing slice images
-# OEM_NFS_NETINST=/srv/public/netinst
+OEM_NFS_NETINST=@oem_nfs_netinst@
 
 # SAMBA share with overlays-live sub-directory, containing slice images
-# OEM_CIFS_NETINST=/netinst
+OEM_CIFS_NETINST=@oem_cifs_netinst@