6 files changed, 64 insertions, 0 deletions
diff --git a/git-check-commit-msg/Makefile-files b/git-check-commit-msg/Makefile-files
new file mode 100644
index 0000000..c0b0e01
--- /dev/null
+++ b/git-check-commit-msg/Makefile-files
@@ -0,0 +1,7 @@
+# -*- makefile -*-
+
+AM_INSTALLCHECK_STD_OPTIONS_EXEMPT += git-check-commit-msg
+bin_SCRIPTS += git-check-commit-msg/git-check-commit-msg
+EXTRA_DIST  += git-check-commit-msg/git-check-commit-msg
+
+TESTS += git-check-commit-msg/run-tests.sh
diff --git a/git-check-commit-msg/commit-1 b/git-check-commit-msg/commit-1
new file mode 100644
index 0000000..043a3ec
--- /dev/null
+++ b/git-check-commit-msg/commit-1
@@ -0,0 +1,5 @@
+First line first line first line first line first
+
+This is a perfect comment. This is a perfect comment. This is a
+perfect comment. This is a perfect comment. This is a perfect
+comment. This is a perfect comment. This is a perfect comment.
diff --git a/git-check-commit-msg/commit-2 b/git-check-commit-msg/commit-2
new file mode 100644
index 0000000..49678a1
--- /dev/null
+++ b/git-check-commit-msg/commit-2
@@ -0,0 +1 @@
+This 1st line is just one lousy character too long!
diff --git a/git-check-commit-msg/commit-3 b/git-check-commit-msg/commit-3
new file mode 100644
index 0000000..ab98cac
--- /dev/null
+++ b/git-check-commit-msg/commit-3
@@ -0,0 +1,3 @@
+Moo
+# Foo
+# Bar
diff --git a/git-check-commit-msg/git-check-commit-msg b/git-check-commit-msg/git-check-commit-msg
new file mode 100755
index 0000000..4ef9e9a
--- /dev/null
+++ b/git-check-commit-msg/git-check-commit-msg
@@ -0,0 +1,20 @@
+#!/bin/sh
+
+msgfile="$1"
+test -s "$msgfile" || {
+	echo >&2 "Commit message must not be empty"
+	exit 1
+}
+
+# Check first line is <= 50 chars, and followed by empty line
+test "x$(sed -n '1s/^.\{,50\}//p' "$msgfile")" = "x"  || {
+	echo >&2 "First line is too long. It should be <= 50 characters."
+        echo >&2 "These characters fit:   $(sed -n '1s/^\(.\{,50\}\)\(.*\)$/\1/p' "$1")"
+	echo >&2 "These exceed the limit: $(sed -n '1s/^\(.\{,50\}\)\(.*\)$/\2/p' "$1")"
+	exit 1
+}
+test "x$(sed -n 's/^#.*//; 2p' "$msgfile")" = "x" || {
+	echo >&2 "Second line should be empty."
+	exit 1
+}
+
diff --git a/git-check-commit-msg/run-tests.sh b/git-check-commit-msg/run-tests.sh
new file mode 100755
index 0000000..d3da61c
--- /dev/null
+++ b/git-check-commit-msg/run-tests.sh
@@ -0,0 +1,28 @@
+#!/bin/sh
+
+tcdir="${top_srcdir-.}"
+script="${top_srcdir-.}/git-check-commit-msg/git-check-commit-msg"
+
+errors=0
+
+while read tc expect restofline
+do
+	tcfile="${tcdir}/git-check-commit-msg/${tc}"
+	test -s "$tcfile" || continue
+
+	"$script" "$tcfile"; s="$?"
+
+	if   [ "$s" -eq 0 ] && [ "x$expect" = "xOK" ]; then :;
+	elif [ "$s" -ne 0 ] && [ "x$expect" = "xFAIL" ]; then :;
+	else
+		sh -x "$script" "$tcfile"
+		echo "TC: $tc expected $expect, but deviates."
+		errors="$(expr $errors + 1)"
+	fi
+done<<EOF
+commit-1	OK
+commit-2	FAIL
+commit-3	OK
+EOF
+
+[ "$errors" -ne 0 ] && exit 1