ci: lint SVG files

.github/workflows/lint.yml

@@ -13,3 +13,8 @@ jobs:
         run: |
           sudo apt-get -y install clang-format
           make lint-c
+
+      - name: Lint SVG files
+        run: |
+          sudo -y apt-get install scour
+          make lint-svg

Makefile

@@ -1,6 +1,6 @@
 .PHONY: lint
-lint: lint-c
+lint: lint-c lint-svg
 
-.PHONY: lint-c
-lint-c:
+.PHONY: lint-c lint-svg
+lint-c lint-svg:
 	./$@.sh

lint-svg.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+shopt -s globstar
+
+exit_code=0
+
+while IFS= read -r -d $'\0' filename; do
+    if [ -f "$filename" ]; then
+        echo "Check formatting of ${filename}"
+        diff "$filename" <(scour --quiet -i "$filename" --indent=space --nindent=2 --protect-ids-noninkscape --enable-id-stripping) 1>&2
+        # shellcheck disable=SC2181
+        if [ $? -ne 0 ]; then
+            exit_code=1
+            echo "Fail"
+        else
+            echo "Pass"
+        fi
+    fi
+done < <(git ls-files -z -- "./**.svg")
+
+exit $exit_code