`--edit-config` fails with a nonexistent `~/.config`

[tablackburn]

Checklist

• I have searched the issue tracker for relevant or duplicate issues.

Area

Topgrade in general

Erroneous behavior

trent@hades:~$ topgrade -v --edit-config
DEBUG Current system locale is en-US
DEBUG No additional configuration directory exists, skipping
DEBUG No configuration exists
DEBUG Unable to write the example configuration file to /home/trent/.config/topgrade.toml: No such file or directory (os error 2). Using blank config.
Error:
   0: No such file or directory (os error 2)

Location:
   src/config.rs:663

Expected behavior

trent@hades:~$ topgrade -v --edit-config
DEBUG Current system locale is en-US
DEBUG No additional configuration directory exists, skipping
DEBUG No configuration exists
<text editor choice prompt>

Steps to reproduce

rm -rf /tmp/tg-repro
XDG_CONFIG_HOME=/tmp/tg-repro/config topgrade -v --edit-config

Problem persists when running command outside of Topgrade

None

Possible cause

ConfigFile::ensure() writes the file without creating its parent directory; Config::load guards this exact condition with if config_directory.is_dir(), but --edit-config returns early in main.rs and calls ConfigFile::edit() → ensure() directly, bypassing that guard.

Ran through Remote Execution?

No

Topgrade version

topgrade 17.9.0

Last working version

No response

Environment

OS: Ubuntu Server 26.04.1 LTS (GNU/Linux 7.0.0-29-generic x86_64)
Topgrade installed from the official .deb release asset. It's a system-wide install at /usr/bin/topgrade. The machine had no ~/.config directory at all

Configuration file

There is no config file

Verbose output

Verbose output

trent@hades:~$ XDG_CONFIG_HOME=/tmp/tg-repro/config topgrade -v --edit-config
DEBUG Current system locale is en-US
DEBUG No additional configuration directory exists, skipping
DEBUG No configuration exists
DEBUG Unable to write the example configuration file to /tmp/tg-repro/config/topgrade.toml: No such file or directory (os error 2). Using blank config.
Error:
   0: No such file or directory (os error 2)

Location:
   src/config.rs:663

Contribution

• I am able and willing to implement a fix myself.
• I am willing to test if someone else implements it. Guide

[GideonBear]

Should create parent dir(s), pr appreciated!