From 0fa7f3c88206654ae48bcebe50ad242cc4a92277 Mon Sep 17 00:00:00 2001
From: Jeffery To <jeffery.to@gmail.com>
Date: Wed, 12 Dec 2018 04:23:47 +0800
Subject: [PATCH] golang: fix package clean / autoremove, add output whitespace

go 1.11 added modules, which are cached locally. The go developers have
decided to make this cache read-only (golang/go#27455), which causes
problems with package clean / autoremove (#7635).

This adds a call to clear this cache right after building, as currently
there is no easy way to hook into autoremove (it may be possible to hook
into package clean).

This also adds whitespace (blank lines) to certain places in make
output, to aid debugging.

Signed-off-by: Jeffery To <jeffery.to@gmail.com>
---
 lang/golang/golang-package.mk | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lang/golang/golang-package.mk b/lang/golang/golang-package.mk
index 11aa212e4a181d..1df4c3fec53dbc 100644
--- a/lang/golang/golang-package.mk
+++ b/lang/golang/golang-package.mk
@@ -171,6 +171,7 @@ define GoPackage/Build/Configure
 			mkdir -p $$$$(dirname $$$$dest) ; \
 			$(CP) $$$$file $$$$dest ; \
 		done ; \
+		echo ; \
 		\
 		link_contents() { \
 			local src=$$$$1 ; \
@@ -209,6 +210,7 @@ define GoPackage/Build/Configure
 		else \
 			echo "Not building binaries, skipping symlinks" ; \
 		fi ; \
+		echo ; \
 	)
 endef
 
@@ -224,16 +226,21 @@ define GoPackage/Build/Compile
 			CXX=$(TARGET_CXX) \
 			$(call GoPackage/Environment) ; \
 		\
+		echo "Finding targets" ; \
 		targets=$$$$(go list $(GO_PKG_BUILD_PKG)) ; \
 		for pattern in $(GO_PKG_EXCLUDES); do \
 			targets=$$$$(echo "$$$$targets" | grep -v "$$$$pattern") ; \
 		done ; \
+		echo ; \
 		\
 		if [ "$(GO_PKG_GO_GENERATE)" = 1 ]; then \
+			echo "Calling go generate" ; \
 			go generate -v $(1) $$$$targets ; \
+			echo ; \
 		fi ; \
 		\
 		if [ "$(GO_PKG_SOURCE_ONLY)" != 1 ]; then \
+			echo "Building targets" ; \
 			case $(GO_ARCH) in \
 			arm)             installsuffix="-installsuffix v$(GO_ARM)" ;; \
 			mips|mipsle)     installsuffix="-installsuffix $(GO_MIPS)" ;; \
@@ -250,10 +257,16 @@ define GoPackage/Build/Compile
 				$(1) \
 				$$$$targets ; \
 			retval=$$$$? ; \
+			echo ; \
 			\
 			if [ "$$$$retval" -eq 0 ] && [ -z "$(call GoPackage/has_binaries)" ]; then \
 				echo "No binaries were generated, consider adding GO_PKG_SOURCE_ONLY:=1 to Makefile" ; \
+				echo ; \
 			fi ; \
+			\
+			echo "Cleaning module download cache (golang/go#27455)" ; \
+			go clean -modcache ; \
+			echo ; \
 		fi ; \
 		exit $$$$retval ; \
 	)