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October 15, 2025 05:10
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Find crates on crates.io that use `[target.<triple>.dependencies]` sections
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| #!/usr/bin/env cargo +nightly -Z script | |
| --- | |
| [package] | |
| edition = "2024" | |
| [dependencies] | |
| crates-index = { version = "3.11.0", features = [ | |
| "git-performance", | |
| "parallel", | |
| "git-https", | |
| ] } | |
| crates_io_api = "0.12.0" | |
| rayon = "1.11.0" | |
| [profile.dev] | |
| opt-level = 2 | |
| --- | |
| use crates_io_api::SyncClient; | |
| use rayon::prelude::*; | |
| use std::{ | |
| collections::{BTreeMap, BTreeSet, HashMap, HashSet}, | |
| sync::Mutex, | |
| }; | |
| fn main() { | |
| let index = crates_index::GitIndex::new_cargo_default().unwrap(); | |
| println!("Done fetching git index"); | |
| let found = Mutex::new(BTreeSet::new()); | |
| index.crates_parallel().for_each(|crate_| { | |
| let crate_ = crate_.unwrap(); | |
| let version = crate_ | |
| .highest_normal_version() | |
| .unwrap_or(crate_.most_recent_version()); | |
| for dep in version.dependencies() { | |
| if let Some(target_cfg) = dep.target() { | |
| if !target_cfg.starts_with("cfg") { | |
| found.lock().unwrap().insert(crate_.name().to_string()); | |
| } | |
| } | |
| } | |
| }); | |
| let found = found.into_inner().unwrap(); | |
| println!("Done parsing crates"); | |
| println!("Found {} crates that use target dependencies", found.len()); | |
| let client = SyncClient::new( | |
| "small-test-script ([email protected])", | |
| std::time::Duration::from_secs(1), | |
| ) | |
| .unwrap(); | |
| let mut ordered: Vec<(String, u64)> = found | |
| .into_iter() | |
| .map(|crate_name| { | |
| let downloads = client.crate_downloads(&crate_name).unwrap(); | |
| let total = downloads | |
| .version_downloads | |
| .iter() | |
| .map(|d| d.downloads) | |
| .sum(); | |
| (crate_name, total) | |
| }) | |
| .collect(); | |
| println!("Done looking up download stats"); | |
| println!(); | |
| ordered.sort_by(|(_, a), (_, b)| b.cmp(&a)); | |
| for (crate_name, total_downloads) in &ordered { | |
| println!("{crate_name} does not use cfg dependency ({total_downloads} downloads)"); | |
| } | |
| } |
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