[RFC] Add basic syntax check on shell scripts

["Torsten Bögershausen" <tboegi@web.de>]

The test suite needs to be run on different platforms.
As it may be difficult for contributors to catch syntax
which work on GNU/linux, but is unportable, make a quick check
for the most common problems.
"sed -i", "echo -n" or "array in shell scripts"
This list is not complete, and may need to be extended

Signed-off-by: Torsten Bögershausen <tboegi@web.de>
---
We add 1 second test execution time
Is this a useful idea at all?
 
 t/t99999-syntax-check.sh | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100755 t/t99999-syntax-check.sh

diff --git a/t/t99999-syntax-check.sh b/t/t99999-syntax-check.sh
new file mode 100755
index 0000000..c4a9289
--- /dev/null
+++ b/t/t99999-syntax-check.sh
@@ -0,0 +1,28 @@
+#!/bin/sh
+
+test_description='Basic check if shell syntax is portable'
+
+. ./test-lib.sh
+
+
+test_expect_success 'No arrays in shell scripts' '
+	>expected &&
+	(grep -i -n "^[	 ]*declare[	 ][	 ]*" ../*.sh ../../git-* >actual 2>&1 || : ) &&
+	test_cmp expected actual &&
+	rm expected actual
+'
+
+test_expect_success 'No sed -i' '
+	>expected &&
+	(grep -n "^[	 ]*sed[	 ][	 ]*\-i" ../*.sh ../../git-* >actual 2>&1 || : ) &&
+	test_cmp expected actual &&
+	rm expected actual
+'
+
+test_expect_success 'No echo -n' '
+	>expected &&
+	(grep -n "^[	 ]*echo[	 ][	 ]*\-n" ../*.sh ../../git-* >actual 2>&1 || : ) &&
+	test_cmp expected actual &&
+	rm expected actual
+'
+test_done
-- 
1.8.0.197.g5a90748