build: finalise rewrite-gitmodules before upcoming rewrite

.repo/rewrite-gitmodules

@@ -1,58 +1,59 @@
 #!/usr/bin/python
-
-from typing import List
-from typing import Tuple
 import configparser
 import sys
+import re
 
-#def add_modules(
-#    modules: List[Tuple[str, str]],
-#    parser: configparser.ConfigParser,
-#) -> None:
-#    """Add set of submodules to gitconfig structure."""
-#    for module in modules:
-#        path, url = module
-#        section = f"submodule \"{path}\""
-#        parser.add_section(section)
-#        parser.set(section, "\tpath", path)
-#        parser.set(section, "\turl", url)
+submodule_pattern = re.compile(r"^submodule\ \"(?P<submodule>.+)\"$")
 
 parser = configparser.ConfigParser()
 parser.read(".gitmodules")
 
-packages = []
-other = []
+# criteria to group packages by
+groups = ["ssh://", "https://"]
+
+buckets = {}
+
+valid = 0
+assigned = 0
+
+for group in groups:
+    buckets[group] = []
 
 for section in parser:
-    # skip default section, it's useless
-    if section == "DEFAULT":
-        continue
-
-    # extract path & url
+    match = re.match(submodule_pattern, section)
+    if match:
+        valid += 1
+        submodule = match.group("submodule")
         path = parser.get(section, "path")
         url = parser.get(section, "url")
 
-    # i've got access to the package, must be one of mine
-    if url.startswith("ssh://"):
-        packages.append((path, url))
-    # no idea who this belongs to
-    elif url.startswith("https://"):
-        other.append((path, url))
+        for group in groups:
+            grp_match = re.match(group, url)
+            if grp_match:
+                assigned += 1
+                buckets[group].append((submodule, path, url))
+                break
 
-# sort modules alphabetically
-packages.sort()
-other.sort()
+if valid != assigned:
+    print("We have a problem.")
+    sys.exit(1)
 
-def write_packages(packages, f):
-    for package in packages:
-        path, url = package
-        section = f"[submodule \"{path}\"]"
-
-        f.write(f"{section}\n")
-        f.write(f"\tpath = {path}\n")
-        f.write(f"\turl = {url}\n")
+# indentation for submodule path/url. defaults to tab.
+indentation = "\t"
 
 # rewrite gitmodules
 with open(".gitmodules", "w") as f:
-    write_packages(packages, f)
-    write_packages(other, f)
+    for group in groups:
+        # skip empty buckets
+        if len(buckets[group]) == 0:
+            continue
+
+        # sort alphabetically
+        buckets[group].sort()
+
+        # write submodules to file
+        for module in buckets[group]:
+            submodule, path, url = module
+            f.write(f'[submodule "{submodule}"]\n')
+            f.write(f"{indentation}path = {path}\n")
+            f.write(f"{indentation}url = {url}\n")