Produce a list of examples that are not mentioned in the src/*.md files.

src/Admin/FindMissingExamples.py

+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+from __future__ import print_function
+
+import os
+import re
+from collections import defaultdict
+
+
+def path_splitter(path):
+    """
+    Split a path into its constituent parts.
+    Might be better written as a recursive function.
+    :param path: The path to split.
+    :return: A list of the path's constituent parts.
+    """
+    res = []
+    while True:
+        p = os.path.split(path)
+        if p[0] == path:
+            # Were done, this is an absolute path.
+            res.insert(0, p[0])
+            break
+        elif p[1] == path:
+            # Were done, this is a relative path.
+            res.insert(0, p[0])
+            break
+        else:
+            path = p[0]
+            res.insert(0, p[1])
+    return res
+
+
+def get_program_parameters():
+    import argparse
+    description = 'Produce a list of examples that are not mentioned in the src/*.md files.'
+    epilogue = '''
+Typical usage:
+   To produce a list of examples that are not mentioned in the src/*.md files:
+      FindMissingExamples.py some_path/VTKExamples/src
+   Where: some_path/VTKExamples/src is the path to the source files for the VTK examples.
+'''
+    parser = argparse.ArgumentParser(description=description, epilog=epilogue,
+                                     formatter_class=argparse.RawTextHelpFormatter)
+    parser.add_argument('vtk_examples', help='The path to the VTK example source files.')
+
+    args = parser.parse_args()
+    return args.vtk_examples
+
+
+class UndocumentedExamples(object):
+    """
+    Find undocumented examples.
+    We do this by:
+     1) Generate sets of all example names keyed on [example type][directory name]
+     2) Generate a set of all example names keyed on  [example type].
+     3) Parse  the markdown files  [example type].md generating example names keyed on [example type]
+     4) Then use set differencing to find the examples not in the [example type].md files.
+    """
+
+    def __init__(self, base_directory):
+        """
+        :param base_directory: The path to the VTK Examples sources, usually some_path/VTKExamples/src
+        """
+        self.example_types = ['CSharp', 'Cxx', 'Java', 'Python']
+        self.base_directory = base_directory
+        # A dictionary consisting of [example type][directory name][example name ...]
+        self.all_examples = dict()
+        self.documented_examples = dict()
+        # A dictionary consisting of [example type][directory name][file name ...]
+        self.example_file_paths = dict()
+
+    def get_all_examples(self):
+        """
+        For each example, get the example file paths and the example file names.
+        """
+        for eg in self.example_types:
+            # Get the paths to the examples in a particular sub directory e.g Cxx.
+            file_paths = defaultdict(set)
+            examples = set()
+            directory = os.path.join(self.base_directory, eg)
+            # Does the directory exist?
+            if not os.path.isdir(directory):
+                raise RuntimeError('Non-existent folder: {:s}'.format(directory))
+            exclude_dirs = None
+            if eg == 'CSharp':
+                fn_pattern = re.compile(r'^[0-9a-zA-Z_\-]+\.cs$')
+            elif eg == 'Cxx':
+                fn_pattern = re.compile(
+                    r'^[0-9a-zA-Z_\-]+\.(hxx|HXX|hpp|HPP|[hH]\+\+|[hH]|cpp|CPP|cxx|CXX|[cC]\+\+|txx|TXX)$')
+                exclude_dirs = ['CMakeTechniques', 'Untested']
+            elif eg == 'Java':
+                fn_pattern = re.compile(r'^[0-9a-zA-Z_\-]+\.java$')
+            elif eg == 'Python':
+                fn_pattern = re.compile(r'^[0-9a-zA-Z_\-]+\.py$')
+            else:
+                raise RuntimeError('Unknown example type.')
+
+            # Walk the tree.
+            for root, directories, files in os.walk(directory):
+                sp = path_splitter(root)
+                idx = sp.index(eg)
+                key = '/'.join(sp[idx:])
+                if exclude_dirs:
+                    if sp[idx] in exclude_dirs:
+                        continue
+                for filename in files:
+                    m = fn_pattern.match(filename)
+                    if m:
+                        example_name = os.path.splitext(filename)[0]
+                        file_paths[key].add(example_name)
+                        examples.add(example_name)
+            self.example_file_paths[eg] = file_paths
+            self.all_examples[eg] = examples
+
+    def parse_markdown_files(self):
+        """
+        Parse the markdown files looking for the examples.
+        :return:
+        """
+        # Go up one level.
+        eg_pattern = re.compile(r'^.*\[ *([a-zA-Z][[a-zA-Z0-9\-_]+) *]')
+        for eg in self.example_types:
+            examples = set()
+            curr_file = os.path.join(self.base_directory, eg + '.md')
+            with open(curr_file) as f:
+                for line in f:
+                    m = eg_pattern.match(line)
+                    if m:
+                        examples.add(m.group(1))
+            self.documented_examples[eg] = examples
+
+    def print_tables(self):
+        self.get_all_examples()
+        self.parse_markdown_files()
+        for eg in self.example_types:
+            undocumented_examples = self.all_examples[eg] - self.documented_examples[eg]
+            if undocumented_examples:
+                print(eg)
+                file_paths = self.example_file_paths[eg]
+                lst = sorted(undocumented_examples)
+                for l in lst:
+                    for p in file_paths.keys():
+                        if l in self.example_file_paths[eg][p]:
+                            print('\t', p, l)
+            print()
+        return
+
+
+def main():
+    example_source = get_program_parameters()
+    UndocumentedExamples(example_source).print_tables()
+
+
+if __name__ == '__main__':
+    main()