add helper script for confing vscode + cmake to use a host config (#691)

.gitignore

@@ -12,3 +12,4 @@ conduit.docker.src.tar
 conduit.docker.src.tar.gz
 Testing/
 .idea
+.vscode/settings.json

.vscode/settings_common.json

@@ -0,0 +1,4 @@
+{
+    "cmake.configureOnOpen": true,
+    "cmake.sourceDirectory": "${workspaceFolder}/src"
+}

scripts/config_vscode.py

@@ -0,0 +1,56 @@
+# Copyright (c) Lawrence Livermore National Security, LLC and other Conduit
+# Project developers. See top-level LICENSE AND COPYRIGHT files for dates and
+# other details. No copyright assignment is required to contribute to Conduit.
+
+import sys
+import json
+import os
+
+from optparse import OptionParser
+
+def parse_args():
+    "Parses args from command line"
+    parser = OptionParser()
+    parser.add_option("--args",
+                      dest="cmake_args",
+                      default=None,
+                      help="cmake arguments")
+    parser.add_option("--host-config",
+                      dest="host_config",
+                      default=None,
+                      help="path to host config file")
+    opts, extras = parser.parse_args()
+    # we want a dict b/c
+    opts = vars(opts)
+    return opts, extras
+
+
+def write_vscode_settings(settings):
+    settings_file = os.path.abspath(".vscode/settings.json")
+    print("[creating: {0}]".format(settings_file))
+    print("[contents]")
+    print(json.dumps(settings, indent=2))
+    open(settings_file, "w").write(json.dumps(settings, indent=2))
+
+def gen_vscode_settings(opts):
+    settings_comm_file = os.path.abspath(".vscode/settings_common.json")
+    res = {}
+    if os.path.isfile(settings_comm_file):
+        res = json.load(open(settings_comm_file))
+    else:
+        print("[warning: {0} not found]".format(settings_comm_file)) 
+
+    if not opts["cmake_args"] is None:
+        res["cmake.configureArgs"] = [opts["cmake_args"]]
+    if not opts["host_config"] is None:
+        res["cmake.cacheInit"] = [opts["host_config"]]
+
+    return res
+
+def main():
+    opts, extras = parse_args()
+    settings = gen_vscode_settings(opts)
+    write_vscode_settings(settings)
+
+if __name__ == "__main__":
+    main()