[openwrt/openwrt] build: package-ipkg: avoid calling wildcard twice

[LEDE Commits]

ynezz pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/40acc13ca72ca7d2815dc5d94549d5dc48e16e98

commit 40acc13ca72ca7d2815dc5d94549d5dc48e16e98
Author: Eneas U de Queiroz <cotequeiroz at gmail.com>
AuthorDate: Thu Feb 20 18:29:02 2020 -0300

    build: package-ipkg: avoid calling wildcard twice
    
    Instead of calling $(wildcard) to check if the removal list is empty,
    then calling it again to actually remove the files, define a function so
    that the arguments are expanded only once when it gets called.
    
    Signed-off-by: Eneas U de Queiroz <cotequeiroz at gmail.com>
---
 include/package-ipkg.mk | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/package-ipkg.mk b/include/package-ipkg.mk
index 569edcbf03..fa39c0927c 100644
--- a/include/package-ipkg.mk
+++ b/include/package-ipkg.mk
@@ -18,6 +18,12 @@ IPKG_REMOVE:= \
 
 IPKG_STATE_DIR:=$(TARGET_DIR)/usr/lib/opkg
 
+# 1: package name
+# 2: candidate ipk files
+define remove_ipkg_files
+  $(if $(strip $(2)),$(IPKG_REMOVE) $(1) $(2))
+endef
+
 # 1: package name
 # 2: variable name
 # 3: variable suffix
@@ -185,7 +191,7 @@ $(_endef)
     $$(IPKG_$(1)) : export DESCRIPTION=$$(Package/$(1)/description)
     $$(IPKG_$(1)) : export PATH=$$(TARGET_PATH_PKG)
     $(PKG_INFO_DIR)/$(1).provides $$(IPKG_$(1)): $(STAMP_BUILT) $(INCLUDE_DIR)/package-ipkg.mk
-	@rm -rf $$(IDIR_$(1)) $$(if $$(call opkg_package_files,$(1)*),; $$(IPKG_REMOVE) $(1) $$(call opkg_package_files,$(1)*))
+	@rm -rf $$(IDIR_$(1)); $$(call remove_ipkg_files,$(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)
@@ -253,7 +259,7 @@ $(_endef)
 	@[ -f $$(IPKG_$(1)) ]
 
     $(1)-clean:
-	$$(if $$(call opkg_package_files,$(1)*),$$(IPKG_REMOVE) $(1) $$(call opkg_package_files,$(1)*))
+	$$(call remove_ipkg_files,$(1),$$(call opkg_package_files,$(1)*))
 
     clean: $(1)-clean