python-3.6.zip added from Github

README.cosmo contains the necessary links.

third_party/python/Tools/msi/csv_to_wxs.py

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+'''
+Processes a CSV file containing a list of files into a WXS file with
+components for each listed file.
+
+The CSV columns are:
+    source of file, target for file, group name
+
+Usage::
+    py txt_to_wxs.py [path to file list .csv] [path to destination .wxs]
+
+This is necessary to handle structures where some directories only
+contain other directories. MSBuild is not able to generate the
+Directory entries in the WXS file correctly, as it operates on files.
+Python, however, can easily fill in the gap.
+'''
+
+__author__ = "Steve Dower <steve.dower@microsoft.com>"
+
+import csv
+import re
+import sys
+
+from collections import defaultdict
+from itertools import chain, zip_longest
+from pathlib import PureWindowsPath
+from uuid import uuid1
+
+ID_CHAR_SUBS = {
+    '-': '_',
+    '+': '_P',
+}
+
+def make_id(path):
+    return re.sub(
+        r'[^A-Za-z0-9_.]',
+        lambda m: ID_CHAR_SUBS.get(m.group(0), '_'),
+        str(path).rstrip('/\\'),
+        flags=re.I
+    )
+
+DIRECTORIES = set()
+
+def main(file_source, install_target):
+    with open(file_source, 'r', newline='') as f:
+        files = list(csv.reader(f))
+
+    assert len(files) == len(set(make_id(f[1]) for f in files)), "Duplicate file IDs exist"
+
+    directories = defaultdict(set)
+    cache_directories = defaultdict(set)
+    groups = defaultdict(list)
+    for source, target, group, disk_id, condition in files:
+        target = PureWindowsPath(target)
+        groups[group].append((source, target, disk_id, condition))
+
+        if target.suffix.lower() in {".py", ".pyw"}:
+            cache_directories[group].add(target.parent)
+
+        for dirname in target.parents:
+            parent = make_id(dirname.parent)
+            if parent and parent != '.':
+                directories[parent].add(dirname.name)
+
+    lines = [
+        '<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi">',
+        '    <Fragment>',
+    ]
+    for dir_parent in sorted(directories):
+        lines.append('        <DirectoryRef Id="{}">'.format(dir_parent))
+        for dir_name in sorted(directories[dir_parent]):
+            lines.append('            <Directory Id="{}_{}" Name="{}" />'.format(dir_parent, make_id(dir_name), dir_name))
+        lines.append('        </DirectoryRef>')
+    for dir_parent in (make_id(d) for group in cache_directories.values() for d in group):
+        lines.append('        <DirectoryRef Id="{}">'.format(dir_parent))
+        lines.append('            <Directory Id="{}___pycache__" Name="__pycache__" />'.format(dir_parent))
+        lines.append('        </DirectoryRef>')
+    lines.append('    </Fragment>')
+
+    for group in sorted(groups):
+        lines.extend([
+            '    <Fragment>',
+            '        <ComponentGroup Id="{}">'.format(group),
+        ])
+        for source, target, disk_id, condition in groups[group]:
+            lines.append('            <Component Id="{}" Directory="{}" Guid="*">'.format(make_id(target), make_id(target.parent)))
+            if condition:
+                lines.append('                <Condition>{}</Condition>'.format(condition))
+
+            if disk_id:
+                lines.append('                <File Id="{}" Name="{}" Source="{}" DiskId="{}" />'.format(make_id(target), target.name, source, disk_id))
+            else:
+                lines.append('                <File Id="{}" Name="{}" Source="{}" />'.format(make_id(target), target.name, source))
+            lines.append('            </Component>')
+
+        create_folders = {make_id(p) + "___pycache__" for p in cache_directories[group]}
+        remove_folders = {make_id(p2) for p1 in cache_directories[group] for p2 in chain((p1,), p1.parents)}
+        create_folders.discard(".")
+        remove_folders.discard(".")
+        if create_folders or remove_folders:
+            lines.append('            <Component Id="{}__pycache__folders" Directory="TARGETDIR" Guid="{}">'.format(group, uuid1()))
+            lines.extend('                <CreateFolder Directory="{}" />'.format(p) for p in create_folders)
+            lines.extend('                <RemoveFile Id="Remove_{0}_files" Name="*" On="uninstall" Directory="{0}" />'.format(p) for p in create_folders)
+            lines.extend('                <RemoveFolder Id="Remove_{0}_folder" On="uninstall" Directory="{0}" />'.format(p) for p in create_folders | remove_folders)
+            lines.append('            </Component>')
+
+        lines.extend([
+            '        </ComponentGroup>',
+            '    </Fragment>',
+        ])
+    lines.append('</Wix>')
+
+    # Check if the file matches. If so, we don't want to touch it so
+    # that we can skip rebuilding.
+    try:
+        with open(install_target, 'r') as f:
+            if all(x.rstrip('\r\n') == y for x, y in zip_longest(f, lines)):
+                print('File is up to date')
+                return
+    except IOError:
+        pass
+
+    with open(install_target, 'w') as f:
+        f.writelines(line + '\n' for line in lines)
+    print('Wrote {} lines to {}'.format(len(lines), install_target))
+
+if __name__ == '__main__':
+    main(sys.argv[1], sys.argv[2])