From: Rafał Miłecki <rafal@milecki.pl>
Date: Wed, 7 Dec 2016 15:19:08 +0000 (+0100)
Subject: base-files: add support for overlaying rootfs content
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=b5222924059f5146007a02e33d317f2c04d7dd0b;p=openwrt%2Fstaging%2Fyousong.git

base-files: add support for overlaying rootfs content

This adds support for install-overlay define. When used in package it
allows installing files to a special directory that gets copied to the
root when installing it.
It allows overwriting files provided by other packages.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---

diff --git a/include/package-ipkg.mk b/include/package-ipkg.mk
index afd2d4ef7a..e168eb390f 100644
--- a/include/package-ipkg.mk
+++ b/include/package-ipkg.mk
@@ -96,7 +96,14 @@ ifeq ($(DUMP),)
     KEEP_$(1):=$(strip $(call Package/$(1)/conffiles))
 
     ifeq ($(BUILD_VARIANT),$$(if $$(VARIANT),$$(VARIANT),$(BUILD_VARIANT)))
+    do_install=
     ifdef Package/$(1)/install
+      do_install=yes
+    endif
+    ifdef Package/$(1)/install-overlay
+      do_install=yes
+    endif
+    ifdef do_install
       ifneq ($(CONFIG_PACKAGE_$(1))$(DEVELOPER),)
         IPKGS += $(1)
         compile: $$(IPKG_$(1)) $(PKG_INFO_DIR)/$(1).provides $(STAGING_DIR_ROOT)/stamp/.$(1)_installed
@@ -178,6 +185,8 @@ $(_endef)
 	@rm -rf $$(IDIR_$(1)) $$(call opkg_package_files,$(1))
 	mkdir -p $(PACKAGE_DIR) $$(IDIR_$(1))/CONTROL $(PKG_INFO_DIR)
 	$(call Package/$(1)/install,$$(IDIR_$(1)))
+	$(if $(Package/$(1)/install-overlay),mkdir -p $(PACKAGE_DIR) $$(IDIR_$(1))/rootfs-overlay)
+	$(call Package/$(1)/install-overlay,$$(IDIR_$(1))/rootfs-overlay)
 	-find $$(IDIR_$(1)) -name 'CVS' -o -name '.svn' -o -name '.#*' -o -name '*~'| $(XARGS) rm -rf
 	@( \
 		find $$(IDIR_$(1)) -name lib\*.so\* -or -name \*.ko | awk -F/ '{ print $$$$NF }'; \
diff --git a/package/base-files/files/lib/functions.sh b/package/base-files/files/lib/functions.sh
index b3bf2213f4..b68db6b6bd 100755
--- a/package/base-files/files/lib/functions.sh
+++ b/package/base-files/files/lib/functions.sh
@@ -230,6 +230,11 @@ default_postinst() {
 		ret=$?
 	fi
 
+	if [ -d "$root/rootfs-overlay" ]; then
+		cp -R $root/rootfs-overlay/. $root/
+		rm -fR $root/rootfs-overlay/
+	fi
+
 	if [ -z "$root" ] && grep -q -s "^/etc/uci-defaults/" "/usr/lib/opkg/info/${pkgname}.list"; then
 		. /lib/functions/system.sh
 		[ -d /tmp/.uci ] || mkdir -p /tmp/.uci