From 4dc56a8b6f6fc0c0f16a92d51f99583909303f95 Mon Sep 17 00:00:00 2001
From: EuAndreh <eu@euandre.org>
Date: Fri, 22 Jan 2021 15:05:07 -0300
Subject: Add build-aux/assert-shellcheck.sh and run in "check" target

---
 Makefile                       | 5 +++++
 build-aux/assert-shellcheck.sh | 6 ++++++
 2 files changed, 11 insertions(+)
 create mode 100755 build-aux/assert-shellcheck.sh

diff --git a/Makefile b/Makefile
index e9537b2..61f4072 100644
--- a/Makefile
+++ b/Makefile
@@ -29,6 +29,11 @@ uninstall:
 check:
 	sh tests/all.sh
 
+	if [ -d .git ]; then \
+		echo 'Assuming Git repository, running development checks.'; \
+		sh build-aux/assert-shellcheck.sh; \
+	fi
+
 dist:
 	if git show $(VERSION) 1>/dev/null 2>/dev/null; then \
 		echo 'Version $(VERSION) already exists.'; \
diff --git a/build-aux/assert-shellcheck.sh b/build-aux/assert-shellcheck.sh
new file mode 100755
index 0000000..334a875
--- /dev/null
+++ b/build-aux/assert-shellcheck.sh
@@ -0,0 +1,6 @@
+#!/bin/sh
+set -eux
+
+git ls-files -z | \
+  xargs -0 awk 'FNR==1 && /^#!\/bin\/sh$/ { print FILENAME }' | \
+  xargs shellcheck
-- 
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