ylw510 opened a new pull request, #10957:
URL: https://github.com/apache/arrow-rs/pull/10957
# Rationale for this change
The top-level `arrow` crate already exposes `ARROW_VERSION` via
`env!("CARGO_PKG_VERSION")` (see #6379). Dependents that only use `arrow-array`
(common for Rust ADBC drivers that need a lean dependency set) currently have
no equivalent API, so they fall back to invoking `cargo metadata` in a build
script to report `DriverArrowVersion`.
That approach is fragile for non-Cargo build systems and adds unnecessary
clean-build overhead. Exposing the same constant from `arrow-array` makes
version reporting trivial for everyone implementing Rust ADBC drivers (and any
other crate that depends on `arrow-array` without the umbrella `arrow` crate).
# What changes are included in this PR?
* Add `pub const ARROW_VERSION: &str = env!("CARGO_PKG_VERSION")` to
`arrow-array`, matching the existing constant on the top-level `arrow` crate.
# Are there any user-facing changes?
Yes: a new public constant on `arrow-array`. No breaking changes.
Usage:
```rust
use arrow_array::ARROW_VERSION;
```
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