Improve govendor testing (#1623 An error occurred )

- Use `govendor list +outside +unused` for finding missing or unused deps and govendor status for catching modified vendor.  
- Remove appengine import

Makefile

@@ -21,6 +21,8 @@ SOURCES ?= $(shell find . -name "*.go" -type f)
 
 TAGS ?=
 
+TMPDIR := $(shell mktemp -d)
+
 ifneq ($(DRONE_TAG),)
 	VERSION ?= $(subst v,,$(DRONE_TAG))
 else
@@ -82,7 +84,13 @@ test-vendor:
 	@hash govendor > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
 		go get -u github.com/kardianos/govendor; \
 	fi
-	govendor status +outside +unused  || exit 1
+	govendor list +unused | tee "$(TMPDIR)/wc-gitea-unused"
+	[ $$(cat "$(TMPDIR)/wc-gitea-unused" | wc -l) -eq 0 ] || echo "Warning: /!\\ Some vendor are not used /!\\"
+
+	govendor list +outside | tee "$(TMPDIR)/wc-gitea-outside"
+	[ $$(cat "$(TMPDIR)/wc-gitea-outside" | wc -l) -eq 0 ] || exit 1
+
+	govendor status || exit 1
 
 .PHONY: test-sqlite
 test-sqlite: integrations.test

vendor/vendor.json

@@ -1,6 +1,6 @@
 {
 	"comment": "",
-	"ignore": "test",
+	"ignore": "test appengine",
 	"package": [
 		{
 			"checksumSHA1": "spqE5xUEPQp8YV67McMTMAUIilY=",