Using diesel CLI with exclude_custom_type_definitions has unexpected outcomes

[Swaagie]

Setup

Versions

• Rust: 1.78
• Diesel: 2.2.0
• Database: Postgres
• Operating System: MacOS

Feature Flags

• diesel: ["postgres", "serde_json", "chrono", "uuid"]

Problem Description

What are you trying to accomplish?

Generating a schema that uses the Geometry SQL types from postgis-diesel. Using the feature exclude_custom_type_definitions introduced with #4002 and documented with https://diesel.rs/guides/configuring-diesel-cli.html#the-exclude_custom_type_definitions-field.

What is the expected output?

No custom definition and an import of the postgis-diesel type(s).

What is the actual output?

The custom definition is created and rather than saving output to src/schema.rs a new file is created with the name of the value of exclude_custom_type_definitions.

Are you seeing any additional errors?

No additional errors. Patching the documentation or the CLI configuration to align would be great. Diesel CLI saving to a filename other than configured is also worthwhile fixing.

Steps to reproduce

Use a diesel.toml configured as below. Then run diesel migration redo.

[print_schema]
file = "src/schema.rs"
custom_type_derives = ["diesel::query_builder::QueryId"]
import_types = ["diesel::sql_types::*", "postgis_diesel::sql_types::*"]
exclude_custom_type_definitions = ["Geometry"]

To get the desired output except_custom_type_definitions has to be used rather than exclude_custom_type_definitions. This will properly save output to src/schema.rs and will use the postgis-diesel type.

Checklist

• I have already looked over the issue tracker and the discussion forum for similar possible closed issues.

• This issue can be reproduced on Rust's stable channel. (Your issue will be
  closed if this is not the case)
• This issue can be reproduced without requiring a third party crate

[weiznich]

Thanks for pointing out. That seems to be a bit of broken documentation. Mind submitting a PR that fixes the documentation here: https://github.com/sgrif/diesel.rs-website/blob/master/src/guides/configuring-diesel-cli.md?plain=1#L131 ?