[PATCH libinput 6/5] tools: add a test to verify the builddir lookup works correctly

[Peter Hutterer]

The binary takes an argument to check whether we expect the builddir to be
detected or not. Then it's executed once as normal test and once after being
copied to /tmp.

Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
---
This was easier than expected... :)

 meson.build                            | 16 +++++++++
 tools/helper-copy-and-exec-from-tmp.sh | 18 ++++++++++
 tools/test-builddir-lookup.c           | 47 ++++++++++++++++++++++++++
 3 files changed, 81 insertions(+)
 create mode 100755 tools/helper-copy-and-exec-from-tmp.sh
 create mode 100644 tools/test-builddir-lookup.c

diff --git a/meson.build b/meson.build
index 826b4fd0..45786d9f 100644
--- a/meson.build
+++ b/meson.build
@@ -679,6 +679,22 @@ executable('ptraccel-debug',
 	   install : false
 	   )
 
+# the libinput tools check whether we execute from the builddir, this is
+# the test to verify that lookup. We test twice, once as normal test
+# run from the builddir, once after copying to /tmp
+test_builddir_lookup = executable('test-builddir-lookup',
+				  'tools/test-builddir-lookup.c',
+				  dependencies : [ dep_tools_shared],
+				  include_directories : [includes_src, includes_include],
+				  install : false)
+test('tools-builddir-lookup',
+     test_builddir_lookup,
+     args : ['--builddir-is-set'])
+test('tools-builddir-lookup-installed',
+     find_program('tools/helper-copy-and-exec-from-tmp.sh'),
+     args : [test_builddir_lookup.full_path(), '--builddir-is-null'],
+     workdir : '/tmp')
+
 ############ tests ############
 
 test_symbols_leak = find_program('test/symbols-leak-test.in')
diff --git a/tools/helper-copy-and-exec-from-tmp.sh b/tools/helper-copy-and-exec-from-tmp.sh
new file mode 100755
index 00000000..46182c42
--- /dev/null
+++ b/tools/helper-copy-and-exec-from-tmp.sh
@@ -0,0 +1,18 @@
+#!/bin/bash -x
+#
+# Usage: helper-copy-and-exec-from-tmp.sh /path/to/binary [args]
+#
+# Copies the given binary into a unique file in /tmp and executes it with
+# [args]. Exits with the same return code as the binary did.
+
+executable="$1"
+shift
+
+target_name=$(mktemp)
+cp "$executable" "$target_name"
+chmod +x "$target_name"
+
+$target_name "$@"
+rc=$?
+rm $target_name
+exit $rc
diff --git a/tools/test-builddir-lookup.c b/tools/test-builddir-lookup.c
new file mode 100644
index 00000000..457ed8cb
--- /dev/null
+++ b/tools/test-builddir-lookup.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright © 2018 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "config.h"
+#include "libinput-util.h"
+#include "shared.h"
+
+
+int main(int argc, char **argv) {
+	char *builddir;
+	char *mode;
+
+	assert(argc == 2);
+	mode = argv[1];
+
+	builddir = tools_execdir_is_builddir();
+	if (streq(mode, "--builddir-is-null")) {
+		assert(builddir == NULL);
+	} else if (streq(mode, "--builddir-is-set")) {
+		assert(builddir != NULL);
+		assert(streq(MESON_BUILD_ROOT, builddir));
+	} else {
+		abort();
+	}
+
+	return 0;
+}
-- 
2.17.1