cube: Download glslangValidator binary

Obviates the need to set GLSLANG_REPO_ROOT or to have glslang
otherwise installed for building this repo.

1 files changed, 73 insertions, 0 deletions

diff --git a/scripts/fetch_glslangvalidator.py b/scripts/fetch_glslangvalidator.py
new file mode 100755
index 00000000..02b93015
--- /dev/null
+++ b/scripts/fetch_glslangvalidator.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python3
+#
+# Copyright (c) 2018 The Khronos Group Inc.
+# Copyright (c) 2018 Valve Corporation
+# Copyright (c) 2018 LunarG, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Author: Mark Lobodzinski <mark@lunarg.com>
+
+
+# This script will download the latest glslang release binary and extract the
+# glslangValidator binary needed by the cube and cubepp applications.
+#
+# It takes as its lone argument the filname (no path) describing the release
+# binary name from the glslang github releases page.
+
+import sys
+import os
+import subprocess
+import urllib.request
+import zipfile
+
+REPO_DIR = os.path.join(os.getcwd(), "..")
+GLSLANG_URL = "https://github.com/KhronosGroup/glslang/releases/download/master-tot"
+
+if __name__ == '__main__':
+    if len(sys.argv) != 2:
+        print("ERROR -- must include a single glslang release zipfile name argument")
+        sys.exit();
+
+    GLSLANG_FILENAME = sys.argv[1]
+    GLSLANG_COMPLETE_URL = GLSLANG_URL + "/" + GLSLANG_FILENAME
+    GLSLANG_OUTFILENAME = os.path.join(REPO_DIR, "glslang", GLSLANG_FILENAME)
+    GLSLANG_VALIDATOR_PATH = os.path.join(REPO_DIR, "glslang", "bin")
+    GLSLANG_VALIDATOR_FULL_PATH = os.path.join(REPO_DIR, "glslang", "bin", "glslangValidator")
+    GLSLANG_DIR = os.path.join(REPO_DIR, "glslang")
+
+    if os.path.isdir(GLSLANG_DIR):
+        if os.path.isdir(GLSLANG_VALIDATOR_PATH):
+            dir_contents = os.listdir(GLSLANG_VALIDATOR_PATH)
+            for afile in dir_contents:
+                if "glslangValidator" in afile:
+                    print("   Using glslangValidator at %s" % GLSLANG_VALIDATOR_PATH)
+                    sys.exit();
+    else:
+        os.mkdir(GLSLANG_DIR)
+    print("   Downloading glslangValidator binary from glslang releases dir")
+    sys.stdout.flush()
+
+    # Download release zip file from glslang github releases site
+    urllib.request.urlretrieve(GLSLANG_COMPLETE_URL, GLSLANG_OUTFILENAME)
+    # Unzip the glslang binary archive
+    zipped_file = zipfile.ZipFile(GLSLANG_OUTFILENAME, 'r')
+    namelist = zipped_file.namelist()
+    for afile in namelist:
+        if "glslangValidator" in afile:
+            EXE_FILE_PATH = os.path.join(GLSLANG_DIR, afile)
+            zipped_file.extract(afile, GLSLANG_DIR)
+            os.chmod(EXE_FILE_PATH, 0o775)
+            break
+    zipped_file.close()
+    sys.exit();