hack/validate/vendor: add more checks

Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>

hack/validate/vendor

@@ -3,28 +3,49 @@
 export SCRIPTDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 source "${SCRIPTDIR}/.validate"
 
-IFS=$'\n'
-files=( $(validate_diff --diff-filter=ACMR --name-only -- 'vendor.conf' 'vendor/' || true) ) 
-unset IFS
+validate_vendor_diff(){
+	IFS=$'\n'
+	files=( $(validate_diff --diff-filter=ACMR --name-only -- 'vendor.conf' 'vendor/' || true) )
+	unset IFS
 
-if [ ${#files[@]} -gt 0 ]; then
-	# We run vndr to and see if we have a diff afterwards
-	vndr
-	# Let see if the working directory is clean
-	diffs="$(git status --porcelain -- vendor 2>/dev/null)"
-	if [ "$diffs" ]; then
-		{
-			echo 'The result of vndr differs'
-			echo
-			echo "$diffs"
-			echo
-			echo 'Please vendor your package with github.com/LK4D4/vndr.'
-			echo
-		} >&2
-		false
+	if [ ${#files[@]} -gt 0 ]; then
+		# We run vndr to and see if we have a diff afterwards
+		vndr
+		# Let see if the working directory is clean
+		diffs="$(git status --porcelain -- vendor 2>/dev/null)"
+		if [ "$diffs" ]; then
+			{
+				echo 'The result of vndr differs'
+				echo
+				echo "$diffs"
+				echo
+				echo 'Please vendor your package with github.com/LK4D4/vndr.'
+				echo
+			} >&2
+			false
+		else
+			echo 'Congratulations! All vendoring changes are done the right way.'
+		fi
 	else
-		echo 'Congratulations! All vendoring changes are done the right way.'
+		echo 'No vendor changes in diff.'
 	fi
-else
-    echo 'No vendor changes in diff.'
-fi
+}
+
+# 1. make sure all the vendored packages are used
+# 2. make sure all the packages contain license information (just warning, because it can cause false-positive)
+validate_vendor_used() {
+    pkgs=$(mawk '/^[a-zA-Z0-9]/ { print $1 }' < vendor.conf)
+    for f in $pkgs; do
+	if ls -d vendor/$f  > /dev/null 2>&1; then
+	    found=$(find vendor/$f -iregex '.*LICENSE.*' -or -iregex '.*COPYRIGHT.*' -or -iregex '.*COPYING.*' | wc -l)
+	    if [ $found -eq 0 ]; then
+		echo "WARNING: could not find copyright information for $f"
+	    fi
+	else
+	    echo "WARNING: $f is vendored but unused"
+	fi
+    done
+}
+
+validate_vendor_diff
+validate_vendor_used