tools: tests: run the bats script indirectly from a shell script

Bats makes it very difficult to run some initial code once, perform
checks for requirements and optionally exit if they are not satisfied.

Instead of working around it in the .bats script, just create
a separate shell script that does all the initial checks and then
execs the actual bats test-suite.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

diff --git a/tools/Makefile.am b/tools/Makefile.am
index d9615f98dfafcd4f89651d41d122df5e2b638d8c..da2528373dfa7e88e49ca14d34bc61db88e67e90 100644 (file)
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -28,10 +28,10 @@ gpiomon_SOURCES = gpiomon.c
 
 gpiofind_SOURCES = gpiofind.c
 
-EXTRA_DIST = gpio-tools-test.bats
+EXTRA_DIST = gpio-tools-test.bats gpio-tools-test.sh
 
 if WITH_TESTS
 
-bin_SCRIPTS = gpio-tools-test.bats
+bin_SCRIPTS = gpio-tools-test.sh gpio-tools-test.bats
 
 endif

diff --git a/tools/gpio-tools-test.bats b/tools/gpio-tools-test.bats
old mode 100755 (executable)
new mode 100644 (file)
index df0533c..f36d4d4
--- a/tools/gpio-tools-test.bats
+++ b/tools/gpio-tools-test.bats
@@ -1,4 +1,3 @@
-#!/usr/bin/env bats
 # SPDX-License-Identifier: LGPL-2.1-or-later
 
 #

diff --git a/tools/gpio-tools-test.sh b/tools/gpio-tools-test.sh
new file mode 100755 (executable)
index 0000000..be4f492
--- /dev/null
+++ b/tools/gpio-tools-test.sh
@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+#
+# This file is part of libgpiod.
+#
+# Copyright (C) 2019 Bartosz Golaszewski <bgolaszewski@baylibre.com>
+#
+
+MIN_KERNEL_VERSION="5.1.0"
+BATS_SCRIPT="gpio-tools-test.bats"
+SOURCE_DIR="$(dirname ${BASH_SOURCE[0]})"
+
+die() {
+       echo "$@" 1>&2
+       exit 1
+}
+
+check_kernel() {
+       local REQUIRED=$1
+       local CURRENT=$(uname -r)
+
+       SORTED=$(printf "$REQUIRED\n$CURRENT" | sort -V | head -n 1)
+
+       if [ "$SORTED" != "$REQUIRED" ]
+       then
+               die "linux kernel version must be at least: v$REQUIRED - got: v$CURRENT"
+       fi
+}
+
+check_prog() {
+       local PROG=$1
+
+       which "$PROG" > /dev/null
+       if [ "$?" -ne "0" ]
+       then
+               die "$PROG not found - needed to run the tests"
+       fi
+}
+
+# Check all required non-coreutils tools
+check_prog bats
+check_prog modprobe
+check_prog rmmod
+check_prog udevadm
+
+# Check if we're running a kernel at the required version or later
+check_kernel $MIN_KERNEL_VERSION
+
+# The bats script must be in the same directory.
+if [ ! -e "$SOURCE_DIR/$BATS_SCRIPT" ]
+then
+       die "testing script not found"
+fi
+
+BATS_PATH=$(which bats)
+
+exec $BATS_PATH $SOURCE_DIR/$BATS_SCRIPT