glsl/tests: reimplement warnings-test in python

This reimplements the test in python with a shell script wrapper that
allows autotools to continue to run the test without realizing that
anything has changed.

Using python has two advantages, first it's portable so this test can be
run on windows as well as Linux since it just requires python, no more
diff, pwd or sh. It's also no longer tied to autotools implementation
details, like the environment variables $srcdir and $abs_builddir,
though the autotools shell wrapper still uses those, which makes it
possible to run the test in meson.

v2: - Use $PYTHON2 in script to be consistent with other scripts in mesa

Signed-off-by: Dylan Baker <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>

2 files changed, 75 insertions, 56 deletions

diff --git a/src/compiler/glsl/tests/warnings-test.sh b/src/compiler/glsl/tests/warnings-test.sh
index d5dc3b5974f..09b6bb2fc98 100755
--- a/src/compiler/glsl/tests/warnings-test.sh
+++ b/src/compiler/glsl/tests/warnings-test.sh
@@ -1,58 +1,3 @@
 #!/bin/sh
 
-if [ -z "$srcdir" -o -z "$abs_builddir" ]; then
-    echo ""
-    echo "Warning: you're invoking the script manually and things may fail."
-    echo "Attempting to determine/set srcdir and abs_builddir variables."
-    echo ""
-
-    # Variable should point to the Makefile.glsl.am
-    srcdir=./../../
-    cd `dirname "$0"`
-    # Variable should point to glsl_compiler
-    abs_builddir=`pwd`/../../
-fi
-
-# Execute several shaders, and check that the InfoLog outcome is the expected.
-
-compiler=$abs_builddir/glsl_compiler
-total=0
-pass=0
-
-if [ ! -x "$compiler" ]; then
-    echo "Could not find glsl_compiler. Ensure that it is build via make check"
-    exit 1
-fi
-
-tests_relative_dir="glsl/tests/warnings"
-
-echo "====== Testing compilation output ======"
-for test in $srcdir/$tests_relative_dir/*.vert; do
-    test_output="$abs_builddir/$tests_relative_dir/`basename $test`"
-    mkdir -p $abs_builddir/$tests_relative_dir/
-    echo -n "Testing `basename $test`..."
-    $compiler --just-log --version 150 "$test" > "$test_output.out" 2>&1
-    total=$((total+1))
-    if diff "$test.expected" "$test_output.out" >/dev/null 2>&1; then
-        echo "PASS"
-        pass=$((pass+1))
-    else
-        echo "FAIL"
-        diff "$test.expected" "$test_output.out"
-    fi
-done
-
-if [ $total -eq 0 ]; then
-    echo "Could not find any tests."
-    exit 1
-fi
-
-echo ""
-echo "$pass/$total tests returned correct results"
-echo ""
-
-if [ $pass = $total ]; then
-    exit 0
-else
-    exit 1
-fi
+$PYTHON2 $srcdir/glsl/tests/warnings_test.py --glsl-compiler $abs_builddir/glsl_compiler --test-directory $srcdir/glsl/tests/warnings/
diff --git a/src/compiler/glsl/tests/warnings_test.py b/src/compiler/glsl/tests/warnings_test.py
new file mode 100755
index 00000000000..2e0f23180f3
--- /dev/null
+++ b/src/compiler/glsl/tests/warnings_test.py
@@ -0,0 +1,74 @@
+#!/usr/bin/env python
+# encoding=utf-8
+# Copyright © 2017 Intel Corporation
+
+# 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 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.
+
+from __future__ import print_function
+import argparse
+import os
+import subprocess
+
+
+def arg_parser():
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        '--glsl-compiler',
+        required=True,
+        help='Path to the standalone glsl compiler')
+    parser.add_argument(
+        '--test-directory',
+        required=True,
+        help='Directory containing tests to run.')
+    return parser.parse_args()
+
+
+def main():
+    args = arg_parser()
+    files = [f for f in os.listdir(args.test_directory) if f.endswith('.vert')]
+    passed = 0
+
+    if not files:
+        print('Could not find any tests')
+        exit(1)
+
+    print('====== Testing compilation output ======')
+    for file in files:
+        print('Testing {} ...'.format(file), end='')
+        file = os.path.join(args.test_directory, file)
+
+        with open('{}.expected'.format(file), 'rb') as f:
+            expected = f.read().strip()
+
+        actual = subprocess.check_output(
+            [args.glsl_compiler, '--just-log', '--version', '150', file]
+        ).strip()
+
+        if actual == expected:
+            print('PASS')
+            passed += 1
+        else:
+            print('FAIL')
+
+    print('{}/{} tests returned correct results'.format(passed, len(files)))
+    exit(0 if passed == len(files) else 1)
+
+
+if __name__ == '__main__':
+    main()