Dealing with trailing whitespaces

Created a validation that detects all trailing whitespaces from every
text file that isn't *.go, *.md, vendor/*,
docs/theme/mkdocs/tipuesearch*

Removed trailing whitespaces from every text file except from vendor/*
builder/parser/testfiles*, docs/theme/mkdocs/tipuesearch* and *.md

Signed-off-by: André Martins <martins@noironetworks.com>

Makefile

@@ -77,7 +77,7 @@ test-docker-py: build
 	$(DOCKER_RUN_DOCKER) hack/make.sh binary test-docker-py
 
 validate: build
-	$(DOCKER_RUN_DOCKER) hack/make.sh validate-gofmt validate-dco validate-toml
+	$(DOCKER_RUN_DOCKER) hack/make.sh validate-gofmt validate-dco validate-toml validate-spaces
 
 shell: build
 	$(DOCKER_RUN_DOCKER) bash

hack/make.sh

@@ -45,6 +45,7 @@ DEFAULT_BUNDLES=(
 	validate-dco
 	validate-gofmt
 	validate-toml
+	validate-spaces
 
 	binary
 

hack/make/validate-spaces

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+source "$(dirname "$BASH_SOURCE")/.validate"
+
+#Ignoring files from vendor/, builder/parser/testfiles*, docs/theme/mkdocs/tipuesearch*, ending with .md and .go
+ignoreFiles='^builder/parser/testfiles*|^docs/theme/mkdocs/tipuesearch*|^vendor/|\.md$|\.go$'
+
+IFS=$'\n'
+files=( $(validate_diff --diff-filter=ACMR --name-only | grep -v "$ignoreFiles" || true) )
+unset IFS
+
+badFiles=()
+for f in "${files[@]}"; do
+    if [ "$(git show "$VALIDATE_HEAD:$f" | grep '[[:space:]]$')" ]; then
+        badFiles+=( "$f" )
+    fi
+done
+
+if [ ${#badFiles[@]} -eq 0 ]; then
+	echo 'Congratulations!  All text files are properly formatted.'
+else
+	{
+		echo "These files have trailing whitespaces:"
+		for f in "${badFiles[@]}"; do
+			echo " - $f"
+		done
+		echo
+		echo 'Please reformat the above files using, for example:'
+		echo '"ex -sc "'"%s/[[:space:]]*$//g|x"'" file" and commit the result.'
+		echo
+	} >&2
+	false
+fi