api doc generator (#1290)

script to generate docs/api.json

CHANGELOG.md

@@ -31,7 +31,7 @@ at anytime.
   *
 
 ### Added
-  *
+  * script to generate docs/api.json file (https://github.com/lbryio/lbry.tech/issues/42)
   *
 
 ### Removed

lbrynet/daemon/Daemon.py

@@ -3360,12 +3360,12 @@ class Daemon(AuthJSONRPCServer):
                              [--pos_arg3=<pos_arg3>]
 
         Options:
-            --a_arg                            : a arg
-            --b_arg                            : b arg
-            --pos_arg=<pos_arg>                : pos arg
-            --pos_args=<pos_args>              : pos args
-            --pos_arg2=<pos_arg2>              : pos arg 2
-            --pos_arg3=<pos_arg3>              : pos arg 3
+            --a_arg                            : (bool) a arg
+            --b_arg                            : (bool) b arg
+            --pos_arg=<pos_arg>                : (int) pos arg
+            --pos_args=<pos_args>              : (int) pos args
+            --pos_arg2=<pos_arg2>              : (int) pos arg 2
+            --pos_arg3=<pos_arg3>              : (int) pos arg 3
         Returns:
             pos args
         """

scripts/generate_json_api.py

@@ -0,0 +1,66 @@
+import os
+import re
+import json
+import inspect
+from textwrap import dedent
+from lbrynet.daemon.Daemon import Daemon
+
+
+SECTIONS = re.compile("(.*?)Usage:(.*?)Options:(.*?)Returns:(.*)", re.DOTALL)
+REQUIRED_OPTIONS = re.compile("\(<(.*?)>.*?\)")
+ARGUMENT_NAME = re.compile("--([^=]+)")
+ARGUMENT_TYPE = re.compile("\s*\((.*?)\)(.*)")
+
+
+def get_api(obj):
+    docstr = inspect.getdoc(obj).strip()
+
+    try:
+        description, usage, options, returns = SECTIONS.search(docstr).groups()
+    except:
+        raise ValueError("Doc string format error for {}.".format(obj.__name__))
+
+    required = re.findall(REQUIRED_OPTIONS, usage)
+
+    arguments = []
+    for line in options.splitlines():
+        line = line.strip()
+        if not line:
+            continue
+        if line.startswith('--'):
+            arg, desc = line.split(':', 1)
+            arg_name = ARGUMENT_NAME.search(arg).group(1)
+            arg_type, arg_desc = ARGUMENT_TYPE.search(desc).groups()
+            arguments.append({
+                'name': arg_name.strip(),
+                'type': arg_type.strip(),
+                'description': [arg_desc.strip()],
+                'is_required': arg_name in required
+            })
+        elif line == 'None':
+            continue
+        else:
+            arguments[-1]['description'].append(line.strip())
+
+    for arg in arguments:
+        arg['description'] = ' '.join(arg['description'])
+
+    return {
+        'name': obj.__name__[len('jsonrpc_'):],
+        'description': description.strip(),
+        'arguments': arguments,
+        'returns': returns.strip()
+    }
+
+
+def write_api(f):
+    apis = []
+    for method_name in sorted(Daemon.callable_methods.keys()):
+        apis.append(get_api(Daemon.callable_methods[method_name]))
+    json.dump(apis, f, indent=4)
+
+
+if __name__ == '__main__':
+    html_file = os.path.join(os.path.dirname(os.path.dirname(__file__)), 'docs', 'api.json')
+    with open(html_file, 'w+') as f:
+        write_api(f)