gluon-core, gluon-site: get version numbers from .config

Calling git describe directly breaks isolation between the build system
and packages. Replace this with proper .config variables, like we
already do for GLUON_RELEASE.

Also replace the PKG_VERSION hack with a static '1', as we do for other
packages - while having those version numbers in opkg was cute, it was
also entirely useless. Having a fixed PKG_VERSION allows us to remove
the PKG_BUILD_DIR override as well.

package/gluon-core/Makefile

 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=gluon-core
+PKG_VERSION:=1
 
-GLUON_VERSION = $(shell git describe --always --dirty=+ 2>/dev/null || echo unknown)
-PKG_VERSION:=$(if $(DUMP),x,$(GLUON_VERSION))
-
-PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
+PKG_CONFIG_DEPENDS := CONFIG_GLUON_VERSION
 
 include ../gluon.mk
 include $(INCLUDE_DIR)/cmake.mk
@@ -22,6 +20,11 @@ define Package/gluon-core/description
 endef
 
 define Package/gluon-core/config
+config GLUON_VERSION
+	string "Gluon version number"
+	depends on PACKAGE_gluon-core
+	default ""
+
 config GLUON_MINIFY
 	bool "Minify Gluon scripts"
 	default y
@@ -36,7 +39,7 @@ define Package/gluon-core/install
 	$(Gluon/Build/Install)
 
 	$(INSTALL_DIR) $(1)/lib/gluon
-	echo '$(GLUON_VERSION)' > $(1)/lib/gluon/gluon-version
+	echo '$(call qstrip,$(CONFIG_GLUON_VERSION))' > $(1)/lib/gluon/gluon-version
 endef
 
 $(eval $(call BuildPackageGluon,gluon-core))

package/gluon-site/Makefile

 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=gluon-site
+PKG_VERSION:=1
 
 GLUON_SITEDIR = $(call qstrip,$(CONFIG_GLUON_SITEDIR))
-GLUON_SITE_VERSION = $(shell ( cd '$(GLUON_SITEDIR)' && git --git-dir=.git describe --always --dirty=+ ) 2>/dev/null || echo unknown)
-PKG_VERSION:=$(if $(DUMP),x,$(GLUON_SITE_VERSION))
 
-PKG_CONFIG_DEPENDS := CONFIG_GLUON_RELEASE CONFIG_GLUON_SITEDIR CONFIG_GLUON_MULTIDOMAIN
+PKG_CONFIG_DEPENDS := CONFIG_GLUON_SITE_VERSION CONFIG_GLUON_RELEASE CONFIG_GLUON_SITEDIR CONFIG_GLUON_MULTIDOMAIN
 PKG_FILE_DEPENDS := $(GLUON_SITEDIR)/site.conf $(GLUON_SITEDIR)/domains/ $(GLUON_SITEDIR)/i18n/
 PKG_BUILD_DEPENDS := lua-jsonc/host gluon-web/host
 
-PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
-
 include ../gluon.mk
 
 PKG_CONFIG_DEPENDS += $(GLUON_I18N_CONFIG)
@@ -21,6 +18,11 @@ define Package/gluon-site
 endef
 
 define Package/gluon-site/config
+config GLUON_SITE_VERSION
+	string "Gluon site version number"
+	depends on PACKAGE_gluon-site
+	default ""
+
 config GLUON_RELEASE
 	string "Gluon release number"
 	depends on PACKAGE_gluon-site
@@ -83,7 +85,7 @@ define Package/gluon-site/install
 	$(CP) $(PKG_BUILD_DIR)/domains $(1)/lib/gluon/
   endif
 
-	echo '$(GLUON_SITE_VERSION)' > $(1)/lib/gluon/site-version
+	echo '$(call qstrip,$(CONFIG_GLUON_SITE_VERSION))' > $(1)/lib/gluon/site-version
 	echo '$(call qstrip,$(CONFIG_GLUON_RELEASE))' > $(1)/lib/gluon/release
 
 	$(GluonInstallI18N)