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doc: Update MSRV policy, shortening to max(4 months, 4 releases) #12402

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Sep 11, 2024
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doc: Update MSRV policy, shortening to max(4 months, 4 releases) #12402

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doc: Updte MSRV policy to not depend on Rust compiler cadences
comphead Sep 9, 2024
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doc: Updte MSRV policy to not depend on Rust compiler cadences
comphead Sep 9, 2024
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Merge branch 'apache:main' into dev
comphead Sep 11, 2024
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doc: Update MSRV policy to not depend on Rust compiler cadences
comphead Sep 11, 2024
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Merge remote-tracking branch 'origin/dev' into dev
comphead Sep 11, 2024
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doc: Update MSRV policy to not depend on Rust compiler cadences
comphead Sep 11, 2024
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10 changes: 6 additions & 4 deletions README.md
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Expand Up @@ -97,9 +97,11 @@ Optional features:

## Rust Version Compatibility Policy

DataFusion's Minimum Required Stable Rust Version (MSRV) policy is to support
each stable Rust version for 6 months after it is
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The previous wording guaranteed support for any rust version for next 6 months.
Given current rust release cadence, shortening the guaranteed support is the main change of this PR. Can we have this reflected in the PR title?

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Good call -- I changed the title to say

doc: Update MSRV policy, shortening to max(4 months, 4 releases)

[released](https://github.com/rust-lang/rust/blob/master/RELEASES.md). This
generally translates to support for the most recent 3 to 4 stable Rust versions.
DataFusion's Minimum Required Stable Rust Version (MSRV) policy is to support stable [4 latest
Rust versions](https://releases.rs) OR the stable minor Rust version as of 4 months, whichever is lower.

For example, given the releases `1.78.0`, `1.79.0`, `1.80.0`, `1.80.1` and `1.81.0` DataFusion will support 1.78.0, which is 3 minor versions prior to the most minor recent `1.81`.

If a hotfix is released for the minimum supported Rust version (MSRV), the MSRV will be the minor version with all hotfixes, even if it surpasses the four-month window.
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👍


We enforce this policy using a [MSRV CI Check](https://github.com/search?q=repo%3Aapache%2Fdatafusion+rust-version+language%3ATOML+path%3A%2F%5ECargo.toml%2F&type=code)