nevi-me opened a new pull request #7018:
URL: https://github.com/apache/arrow/pull/7018
When a user compiles the `flight` crate, a `build.rs` script is invoked.
This script recursively looks for the `format/Flight.proto` path. A user might
not have that path, as they would not have cloned the arrow repository, and as
such, the build fails.
This change:
a) checks if the `../../format/Flight.proto` path exists, and only builds if
the file exists, and has been changed.
b) checks in the proto file into the `src/` directory, changing the default
location from an opaque directory in the `target/{debug|release}/build-xxx`
folder.
The rationale for checking in the proto file is that if the file is not
rebuilt, `flight` users are still able to access the file. It's also beneficial
for users to easily view the file, and better understand how the generated code
looks like.
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