Updated the readme for the example parser.

README.parsers.md

 ***Note:** This is a general README file for NOMAD parsers, consult the README of specific parser projects for more detailed information!*
 
+$preamble$
+
 This is a NOMAD parser for [$codeLabel$]($codeUrl$). It will read $codeLabel$ input and
 output files and provide all information in NOMAD's unified Metainfo based Archive format.
 
@@ -64,7 +66,15 @@ python_dict = section_run.m_to_dict()
 
 ## Developing the parser
 
-Also install NOMAD's pypi package:
+Create a virtual environment to install the parser in development mode:
+
+```
+pip install virtualenv
+virtualenv -p `which python3` .pyenv
+source .pyenv/bin/activate
+```
+
+Install NOMAD's pypi package:
 
 ```
 pip install nomad-lab

example @ aff72472

-Subproject commit ca9596fcf15f938122d55ae12222dede9e3610a0
+Subproject commit aff72472303ff1da53fe88388e6f7edc76f28535

nomad/cli/dev.py

@@ -234,12 +234,12 @@ def update_parser_readmes(parser):
 
                 print('\tReplacing', key)
                 find = r'\$' + key + r'\$'
-                replace = mdata[key]
+                replace = mdata.get(key, '')
 
                 if key == 'parserSpecific':
                     if mdata[key] != '':
-                        replace = r'---\n## Parser Specific\n' + replace
-                # print('\t', find, ' -> ', replace)
+                        replace = r'## Parser Specific\n' + replace
+
                 body = re.sub(find, replace, body)
 
             # Extra: to replace the codeName (there's no YAML key for this)
@@ -265,56 +265,6 @@ def update_parser_readmes(parser):
             local.truncate()
 
 
-@dev.command(help='Updates parser`s metadata YAML')
-def update_parsers_metadata():
-    import re
-    from glob import glob
-    print('\nPWD: ', os.getcwd())
-    print('WARNING: to be run from project`s root dir\n')
-
-    # Based on
-    # https://www.kite.com/python/answers/how-to-update-and-replace-text-in-a-file-in-python
-
-    # dictionary to change YAML keys to camelCase
-    new_keys = {
-        'code-label': 'codeLabel',
-        'code-label-style': 'codeLabelStyle',
-        'code-url': 'codeUrl',
-        'parser-dir-name': 'parserDirName',
-        'parser-git-url': 'parserGitUrl',
-        'parser-specific': 'parserSpecific',
-        'table-of-files': 'tableOfFiles'}
-
-    num = 0
-    parser_path = './dependencies/parsers/'
-    for ddir in sorted(glob(parser_path + '*/')):
-        num += 1
-        parser_dirname = ddir.split('/')[-2]
-        print('{} Working on {}' .format(num, parser_dirname))
-
-        local_mdata = ddir + 'metadata.yaml'
-        if os.path.isfile(local_mdata) is False:
-            print('\tWARNING: old readme file absent: {}'.format(local_mdata))
-            continue
-
-        # Replace key names in metadata.yaml
-        # we open it as plain text: YAML module is unnecesary
-        with open(local_mdata, 'r+') as local:
-            body = local.read()
-
-            for key in new_keys.keys():
-                # Add  ':' to ensure complete sentence
-                find, replace = key + ':', new_keys[key] + ':'
-
-                # print('\t {:15} \t -> {} ' .format(find, replace))
-                body = re.sub(find, replace, body)
-
-            # save file
-            local.seek(0)  # go to the top
-            local.write(body)
-            local.truncate()
-
-
 @dev.command(help='Creates a Javascript source file containing the required unit conversion factors.')
 @click.pass_context
 def units(ctx):