Try to automatically bump packages when needed

patches/openwrt/wip/0001-build-Automatically-bump-release-when-needed.patch

+From 9fe18947fd91b7ed5b0bca1eae893ad50f7a00a7 Mon Sep 17 00:00:00 2001
+From: Michal Hrusecky <michal.hrusecky@nic.cz>
+Date: Wed, 31 Oct 2018 13:14:23 +0100
+Subject: [PATCH] build: Automatically bump release when needed
+
+Automatically check whether dependencies or current package changed too much
+and bump release number if it did.
+
+Signed-off-by: Michal Hrusecky <michal.hrusecky@nic.cz>
+---
+ include/package-defaults.mk |  2 +-
+ include/package-ipkg.mk     | 14 +++++++++++++-
+ rules.mk                    |  1 +
+ 3 files changed, 15 insertions(+), 2 deletions(-)
+
+diff --git a/include/package-defaults.mk b/include/package-defaults.mk
+index 31e331b..ee8cb5e 100644
+--- a/include/package-defaults.mk
++++ b/include/package-defaults.mk
+@@ -28,7 +28,7 @@ define Package/Default
+     ifneq ($(PKG_RELEASE),)
+       VERSION:=$(PKG_VERSION)-$(PKG_RELEASE)
+     else
+-      VERSION:=$(PKG_VERSION)
++      VERSION:=$(PKG_VERSION)-0
+     endif
+   else
+     VERSION:=$(PKG_RELEASE)
+diff --git a/include/package-ipkg.mk b/include/package-ipkg.mk
+index 457f2e7..535d419 100644
+--- a/include/package-ipkg.mk
++++ b/include/package-ipkg.mk
+@@ -190,6 +190,8 @@ $(_endef)
+ 			fi; \
+ 		done; $(Package/$(1)/extra_provides) \
+ 	) | sort -u > $(PKG_INFO_DIR)/$(1).provides
++	find $$(IDIR_$(1)) -type f -exec $(TARGET_CROSS)nm -C --with-symbol-versions \{\} \; | sed -n 's|^[0-9a-fA-F]\+\ [a-zA-Z]\ \([^[:blank:]]\)|\1|p' | sort -u > "$(PKG_INFO_DIR)"/$(1).symbols
++	find $$(IDIR_$(1)) -type f -print > "$(PKG_INFO_DIR)"/$(1).files
+ 	$(if $(PROVIDES),@for pkg in $(filter-out $(1),$(PROVIDES)); do cp $(PKG_INFO_DIR)/$(1).provides $(PKG_INFO_DIR)/$$$$pkg.provides; done)
+ 	$(CheckDependencies)
+ 
+@@ -204,8 +206,18 @@ $(_endef)
+ 	)
+     endif
+ 	(cd $$(IDIR_$(1))/CONTROL; \
++		BUILD_VER=0; BUMP=""; \
++		[ \! -f "$(PKG_OLD_INFO_DIR)"/$(1).build_num ] || BUILD_VER="`cat "$(PKG_OLD_INFO_DIR)"/$(1).build_num`"; \
++		for pkg in $(1) $$(IDEPEND_$(1)); do \
++			[ \! -f "$(PKG_OLD_INFO_DIR)"/$(1).symbols ] || diff -q "$(PKG_INFO_DIR)"/$(1).symbols "$(PKG_OLD_INFO_DIR)"/$(1).symbols || BUMP=1; \
++			[ \! -f "$(PKG_OLD_INFO_DIR)"/$(1).files ] || diff -q "$(PKG_INFO_DIR)"/$(1).files "$(PKG_OLD_INFO_DIR)"/$(1).files || BUMP=1; \
++		done; \
++		[ -z "$$$$BUMP" ] || BUILD_VER="`expr $$$$BUILD_VER + 1`"; \
++		echo "$(VERSION)" > "$(PKG_INFO_DIR)"/$(1).base_ver; \
++		diff -q "$(PKG_INFO_DIR)"/$(1).base_ver "$(PKG_OLD_INFO_DIR)"/$(1).base_ver || BUILD_VER=0
++		echo "$$$$BUILD_VER" > "$(PKG_INFO_DIR)"/$(1).build_num; \
+ 		( \
+-			echo "$$$$CONTROL"; \
++			echo "$$$$CONTROL" | sed 's|\(Version: .*\)|\1.'"$$$$BUILD_VER|"; \
+ 			printf "Description: "; echo "$$$$DESCRIPTION" | sed -e 's,^[[:space:]]*, ,g'; \
+ 		) > control; \
+ 		chmod 644 control; \
+diff --git a/rules.mk b/rules.mk
+index 0f385bd..9974111 100644
+--- a/rules.mk
++++ b/rules.mk
+@@ -161,6 +161,7 @@ STAGING_DIR_ROOT:=$(STAGING_DIR)/root-$(BOARD)
+ STAGING_DIR_IMAGE:=$(STAGING_DIR)/image
+ BUILD_LOG_DIR:=$(TOPDIR)/logs
+ PKG_INFO_DIR := $(STAGING_DIR)/pkginfo
++PKG_OLD_INFO_DIR := $(STAGING_DIR)/pkginfo-old
+ 
+ BUILD_DIR_HOST:=$(if $(IS_PACKAGE_BUILD),$(BUILD_DIR_BASE)/hostpkg,$(BUILD_DIR_BASE)/host)
+ STAGING_DIR_HOST:=$(TOPDIR)/staging_dir/host
+-- 
+2.19.1
+