# Description
While #11057 is merged, it's hard to tell the difference between
`--flag: bool` and `--flag`, and it makes user hard to read custom
commands' signature, and hard to use them correctly.
After discussion, I think we can deprecate `--flag: bool` usage, and
encourage using `--flag` instead.
# User-Facing Changes
The following code will raise warning message, but don't stop from
running.
```nushell
❯ def florb [--dry-run: bool, --another-flag] { "aaa" }; florb
Error: × Deprecated: --flag: bool
╭─[entry #7:1:1]
1 │ def florb [--dry-run: bool, --another-flag] { "aaa" }; florb
· ──┬─
· ╰── `--flag: bool` is deprecated. Please use `--flag` instead, more info: https://www.nushell.sh/book/custom_commands.html
╰────
aaa
```
cc @kubouch
# Tests + Formatting
Done
# After Submitting
- [ ] Add more information under
https://www.nushell.sh/book/custom_commands.html to indicate `--dry-run:
bool` is not allowed,
- [ ] remove `: bool` from custom commands between 0.89 and 0.90
---------
Co-authored-by: Antoine Stevan <44101798+amtoine@users.noreply.github.com>
5d98a727ca