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commands: add an alias for --check to be the same as --call=check

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This adds an alias for `--check` that causes it to behave the same as
`--call=check`. This is done using `BoolFunc` to call a function when
the option is seen and to set it to the correct value. This should allow
command line flags like `--check --call=targets` to work correctly (even
though they conflict) by making it so the first invocation sets the
print function to `check` and the second overwrites the first. This is
the expected behavior for these types of boolean flags.

`BoolFunc` itself is part of the standard library flags package, but
never seems to have made it into pflag possibly because it was added in
go 1.21.

https://pkg.go.dev/flag#FlagSet.BoolFunc

Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>
This commit is contained in:
Jonathan A. Sternberg
2024-05-31 17:02:53 -05:00
parent 89810dc998
commit ef4a165e48
4 changed files with 29 additions and 0 deletions
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docs/reference/buildx_build.md
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@ -26,6 +26,7 @@ Start a build
| [`--cache-to`](#cache-to) | `stringArray` | | Cache export destinations (e.g., `user/app:cache`, `type=local,dest=path/to/dir`) |
| `--call` | `string` | `build` | Set method for evaluating build (`check`, `outline`, `targets`) |
| [`--cgroup-parent`](https://docs.docker.com/reference/cli/docker/image/build/#cgroup-parent) | `string` | | Set the parent cgroup for the `RUN` instructions during build |
| `--check` | | | Shorthand for `--call=check` |
| `--detach` | | | Detach buildx server (supported only on linux) (EXPERIMENTAL) |
| [`-f`](https://docs.docker.com/reference/cli/docker/image/build/#file), [`--file`](https://docs.docker.com/reference/cli/docker/image/build/#file) | `string` | | Name of the Dockerfile (default: `PATH/Dockerfile`) |
| `--iidfile` | `string` | | Write the image ID to a file |