initial commit of the sample parser

README.md

+# Sample Parser
+
+The aim of this project is to give the basic setup for a parser using the python library developed for
+[NOMAD CoE](http://nomad-coe.eu)
+
+The setup is expected to be improved as we find better ways to write the parsers.
+For your parser rename parser/sample-parser to parser/parser-YourCode and likewise fix
+the code.
+
+The python-common and nomad-meta-info repositories are expected to be checked out one level
+higher as this repository.
+This is automatically the case if you clone nomad-lab-base (the parsers are in parsers subdirectory).
+
+For more information on how to write a parser see the [wiki](https://gitlab.mpcdf.mpg.de/nomad-lab/nomad-lab-base/wikis/how-to-write-a-parser).

parser/sample-parser/sample_parser.py

+import setup_paths
+from nomadcore.simple_parser import SimpleMatcher, mainFunction
+from nomadcore.local_meta_info import loadJsonFile, InfoKindEl
+import os, sys, json
+
+# description of the input
+mainFileDescription = SimpleMatcher(name = 'root',
+              weak = True,
+              startReStr = "",
+              subMatchers = [
+  SimpleMatcher(name = 'newRun',
+                startReStr = r"\s*# SampleParser #\s*",
+                repeats = True,
+                required = True,
+                forwardMatch = True,
+                sections   = ['section_run'],
+                subMatchers = [
+    SimpleMatcher(name = 'header',
+                  startReStr = r"\s*# SampleParser #\s*")
+                ])
+              ])
+
+# loading metadata from nomad-meta-info/meta_info/nomad_meta_info/fhi_aims.nomadmetainfo.json
+
+parserInfo = {
+  "name": "sample_parser",
+  "version": "1.0"
+}
+
+metaInfoPath = os.path.normpath(os.path.join(os.path.dirname(os.path.abspath(__file__)),"../../../../nomad-meta-info/meta_info/nomad_meta_info/sample_parser.nomadmetainfo.json"))
+metaInfoEnv, warnings = loadJsonFile(filePath = metaInfoPath, dependencyLoader = None, extraArgsHandling = InfoKindEl.ADD_EXTRA_ARGS, uri = None)
+
+if __name__ == "__main__":
+    mainFunction(mainFileDescription, metaInfoEnv, parserInfo)

parser/sample-parser/setup_paths.py

+import sys, os, os.path
+baseDir = os.path.dirname(os.path.abspath(__file__))
+commonDir = os.path.normpath(os.path.join(baseDir,"../../../../python-common/python"))
+
+if not commonDir in sys.path:
+    sys.path.insert(0, commonDir)

test/examples/README.md

+sample files to test the parser