add /etc/group file parser

docs/parsers/group.md

@@ -0,0 +1,141 @@
+# jc.parsers.group
+jc - JSON CLI output utility /etc/group file Parser
+
+Usage:
+
+    specify --group as the first argument if the piped input is coming from /etc/group
+
+Compatibility:
+
+    'linux', 'darwin', 'aix', 'freebsd'
+
+Examples:
+
+    $ cat /etc/group | jc --group -p
+    [
+      {
+        "group_name": "nobody",
+        "password": "*",
+        "gid": -2,
+        "group_list": []
+      },
+      {
+        "group_name": "nogroup",
+        "password": "*",
+        "gid": -1,
+        "group_list": []
+      },
+      {
+        "group_name": "wheel",
+        "password": "*",
+        "gid": 0,
+        "group_list": [
+          "root"
+        ]
+      },
+      {
+        "group_name": "certusers",
+        "password": "*",
+        "gid": 29,
+        "group_list": [
+          "root",
+          "_jabber",
+          "_postfix",
+          "_cyrus",
+          "_calendar",
+          "_dovecot"
+        ]
+      },
+      ...
+    ]
+
+    $ cat /etc/group | jc --group -p -r
+    [
+      {
+        "group_name": "nobody",
+        "password": "*",
+        "gid": "-2",
+        "group_list": [
+          ""
+        ]
+      },
+      {
+        "group_name": "nogroup",
+        "password": "*",
+        "gid": "-1",
+        "group_list": [
+          ""
+        ]
+      },
+      {
+        "group_name": "wheel",
+        "password": "*",
+        "gid": "0",
+        "group_list": [
+          "root"
+        ]
+      },
+      {
+        "group_name": "certusers",
+        "password": "*",
+        "gid": "29",
+        "group_list": [
+          "root",
+          "_jabber",
+          "_postfix",
+          "_cyrus",
+          "_calendar",
+          "_dovecot"
+        ]
+      },
+      ...
+    ]
+
+## info
+```python
+info(self, /, *args, **kwargs)
+```
+
+## process
+```python
+process(proc_data)
+```
+
+Final processing to conform to the schema.
+
+Parameters:
+
+    proc_data:   (dictionary) raw structured data to process
+
+Returns:
+
+    List of dictionaries. Structured data with the following schema:
+
+    [
+      {
+        "group_name":    string,
+        "password":      string,
+        "gid":           integer,
+        "group_list": [
+                         string
+        ]
+      }
+    ]
+
+## parse
+```python
+parse(data, raw=False, quiet=False)
+```
+
+Main text parsing function
+
+Parameters:
+
+    data:        (string)  text data to parse
+    raw:         (boolean) output preprocessed JSON if True
+    quiet:       (boolean) suppress warning messages if True
+
+Returns:
+
+    List of dictionaries. Raw or processed structured data.
+