Crates / cfg-expr / Maintained?
Rust crate maintenance · data Oct 24, 2026
Is cfg-expr still maintained?
Short answerYes: actively maintained. cfg-expr's newest version, 0.20.10, shipped on Oct 1, 2026 (23 days ago). It has had 7 releases in the last 12 months and 15 in 24, and 52 non-yanked versions since 2020. 22 crates depend on it and it gets 348,087 real downloads a day.
The signals
- Last release: 23 days ago (0.20.10, Oct 1, 2026).
- Release rhythm: 7 in the last year, 15 in two.
- Still used: 348,087 real downloads a day, quiet-day trend +9% against the field.
- Pre-1.0: 0.20.10; minor bumps may break you, so pin the minor version.
Releases per quarter, last 2 years
| Quarter | Releases | |
|---|---|---|
| Oct 27 to Jan 25, 2025 | 2 | |
| Jan 26 to Apr 26, 2025 | 2 | |
| Apr 27 to Jul 26, 2025 | 2 | |
| Jul 27 to Oct 25, 2025 | 2 | |
| Oct 26 to Jan 24, 2026 | 3 | |
| Jan 25 to Apr 25, 2026 | 1 | |
| Apr 26 to Jul 25, 2026 | 1 | |
| Jul 26 to Oct 24, 2026 | 2 |
If you need something more active
Rules
From crates.io release history (non-yanked versions), fetched Oct 24, 2026: last release within 6 months = actively maintained; within 18 months = slow cadence; older with 1,000+ dependents = quiet and widely relied on; otherwise quiet. We do not read commits or issues: a crate can be finished and safe without new releases, and active on GitHub without publishing. Before you rely on it, look at the repository for recent commits and open issues. Run cargo audit for security advisories.
Up next
The full numbers: Few direct dependents and steady. Chart, alternatives and badge.cfg-exprRust crate. A parser and evaluator for Rust `cfg()` expressions. Real use: 348K downloads a day on quiet days; 22 crates depend on it.Read it next →Also worth your time