More tinkering. Lots of refactoring to get it to do what I want.

git-tidy

@@ -1,104 +0,0 @@
-#!/usr/bin/env python
-
-# git-tidy is free software: you can redistribute it and/or modify it under the terms of the GNU
-# General Public License as published by the Free Software Foundation, either version 3 of the
-# License, or (at your option) any later version.
-
-# git-tidy is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
-# the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
-# Public License for more details.
-
-# You should have received a copy of the GNU General Public License along with git-tidy. If not, see
-# <https://www.gnu.org/licenses/>.
-
-import subprocess
-import sys
-
-common_default_branches = [
-    "main",
-    "master",
-    "devel",
-    "dev",
-]
-
-# Check whether we're actually in a git repo before doing anything else.
-# TODO: Rename this function to something more obvious.
-def get_status():
-    git_status = subprocess.run(
-        ["git", "status"],
-        capture_output=True,  # we don't want to show the user everything
-    )
-    if git_status.returncode == 0:
-        return True
-
-    print(git_status.stderr.decode())
-    return False
-
-
-def get_default_branch() -> str:
-    # Try to see if there's a configuration already.
-    sp = subprocess.run(["git", "config", "--get", "tidy.defaultbranch"], capture_output=True)
-    if sp.returncode != 0:
-        print("No default branch for git-tidy configured, will try to figure out which to use...")
-        candidates = []
-        branch_list = [
-            branch.strip()
-            for branch in subprocess.run(["git", "branch", "--list"], capture_output=True).stdout.decode().split("\n")
-            if len(branch)
-        ]
-        # Check whether any branches match our list of common defaults.
-        for branch in branch_list:
-            # Remove the asterisk in front of the active branch name.
-            if branch[0] == "*":
-                branch = branch[2:]
-
-            if branch in common_default_branches:
-                candidates.append(branch)
-
-        if len(candidates) == 1:
-            # Only one branch name matches, so we'll go with that one.
-            subprocess.run(["git", "config", "--add", "tidy.defaultbranch", candidates[0]])
-            return candidates[0]
-
-        # TODO: Handle the zero case.
-
-        # If we don't have one or zero, which do we have?
-        selection = -1
-        while (selection < 0) or (selection >= len(candidates)):
-            print(
-                f"{'Several' if len(candidates) > 1 else 'No'}  potential default branch candidates found. Please select one:"
-            )
-            for n, candidate in enumerate(candidates):
-                print(f"{n}: {candidate}")
-
-            # TODO: This breaks if the user is stupid and doesn't input an int.
-            selection = int(input("Which to choose?"))
-
-        return candidates[selection]
-
-    # TODO: Might be nice to have a sanity-check that the configured branch is in fact actually on the list. It may just be easiest to do this by trying to switch to it.
-    return sp.stdout.decode()
-
-
-if __name__ == "__main__":
-    if not get_status():
-        exit()
-
-    default_branch = get_default_branch()
-    print(f"Switching to {default_branch}")
-    # Checkout the default branch.
-    subprocess.run(["git", "switch", default_branch])
-
-    subprocess.run(["git", "pull"])  # Make sure it's the most up-to-date version.
-
-    # Check which branches are `--merged` and delete them.
-    merged_branch_output = subprocess.run(["git", "branch", "--merged"], capture_output=True)
-    merged_branches = [
-        branch for branch in merged_branch_output.stdout.decode().split("\n") if len(branch)
-    ]  # Remove zero-length elements.
-    for branch in merged_branches:
-        if branch[0] != "*":
-            subprocess.run(["git", "branch", "-d", branch.strip()])
-
-    # Clear up dangling references to remote branches which are no longer.
-    subprocess.run(["git", "fetch", "--all", "-p"])