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Add deprecation / API removal policy #6852

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merged 7 commits into from
Dec 18, 2024
Merged

Add deprecation / API removal policy #6852

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f724954
Add deprecation / API removal policy
alamb Dec 6, 2024
da4527b
Increase proposal to 2 releases
alamb Dec 7, 2024
01c6977
change from policy to guidelines, add flexibility
alamb Dec 12, 2024
9eee208
Merge remote-tracking branch 'apache/main' into alamb/deprecation_policy
alamb Dec 12, 2024
1f5bf65
prettier
alamb Dec 12, 2024
7632458
Merge remote-tracking branch 'apache/main' into alamb/deprecation_policy
alamb Dec 17, 2024
9fcc60c
Make instructions more actionable
alamb Dec 17, 2024
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19 changes: 19 additions & 0 deletions README.md
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Expand Up @@ -82,6 +82,25 @@ versions approximately every 2 months.

[`object_store`]: https://crates.io/crates/object_store

### Deprecation Guidelines

Minor releases may deprecate, but not remove APIs. Deprecating APIs allows
downstream Rust programs to still compile, but generate compiler warnings. This
gives downstream crates time to migrate prior to API removal.

All deprecated APIs are marked using the `#[deprecated]` attribute with both the
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#[deprecated(since="...", note="...")] to decrease chances of creating new deprecations with missing since attr? (see #6782)

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Clarified in 9fcc60c

first version they were deprecated in, and what new API to use instead.

```rust
#[deprecated(since = "51.0.0", note = "Use `date_part` instead")]
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like in DF deprecation guidelines, it it obvious how a contributor should fill the since field? eg is this the version string from cargo.toml, or next major from that?

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like in DF deprecation guidelines,

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I tried to do it in 9fcc60c

```

In general, deprecated APIs will be kept for at least two major releases after
they were deprecated (typically between 6 - 9 months later). For example, an API
deprecated in `51.3.0` can be removed in `54.0.0` (or later). Deprecated APIs
may be removed earlier or later than these guidelines at the discretion of the
maintainers.

## Related Projects

There are several related crates in different repositories
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2 changes: 1 addition & 1 deletion arrow/README.md
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Expand Up @@ -37,7 +37,7 @@ This crate is tested with the latest stable version of Rust. We do not currently

The `arrow` crate follows the [SemVer standard] defined by Cargo and works well
within the Rust crate ecosystem. See the [repository README] for more details on
the release schedule and version.
the release schedule, version and deprecation policy.

[SemVer standard]: https://doc.rust-lang.org/cargo/reference/semver.html
[repository README]: https://github.com/apache/arrow-rs
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2 changes: 1 addition & 1 deletion parquet/README.md
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Expand Up @@ -36,7 +36,7 @@ This crate is tested with the latest stable version of Rust. We do not currently

The `parquet` crate follows the [SemVer standard] defined by Cargo and works well
within the Rust crate ecosystem. See the [repository README] for more details on
the release schedule and version.
the release schedule, version and deprecation policy.

[semver standard]: https://doc.rust-lang.org/cargo/reference/semver.html
[repository readme]: https://github.com/apache/arrow-rs
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