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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| #![allow(clippy::filter_map)] | ||
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||
| use std::fs; | ||
| use std::fs::File; | ||
| use std::io::prelude::*; | ||
| use std::path::PathBuf; | ||
|
|
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| // This module takes an absolute path to a rustc repo and alters the dependencies to point towards | ||
| // the respective rustc subcrates instead of using extern crate xyz. | ||
| // This allows rust analyzer to analyze rustc internals and show proper information inside clippy | ||
| // code. See https://github.com/rust-analyzer/rust-analyzer/issues/3517 and https://github.com/rust-lang/rust-clippy/issues/5514 for details | ||
|
|
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| pub fn run(rustc_path: Option<&str>) { | ||
| // we can unwrap here because the arg is required here | ||
| let rustc_path = PathBuf::from(rustc_path.unwrap()); | ||
| assert!(rustc_path.is_dir(), "path is not a directory"); | ||
| let rustc_source_basedir = rustc_path.join("src"); | ||
| assert!( | ||
| rustc_source_basedir.is_dir(), | ||
| "are you sure the path leads to a rustc repo?" | ||
| ); | ||
|
|
||
| let clippy_root_manifest = fs::read_to_string("Cargo.toml").expect("failed to read ./Cargo.toml"); | ||
| let clippy_root_lib_rs = fs::read_to_string("src/driver.rs").expect("failed to read ./src/driver.rs"); | ||
| inject_deps_into_manifest( | ||
| &rustc_source_basedir, | ||
| "Cargo.toml", | ||
| &clippy_root_manifest, | ||
| &clippy_root_lib_rs, | ||
| ) | ||
| .expect("Failed to inject deps into ./Cargo.toml"); | ||
|
|
||
| let clippy_lints_manifest = | ||
| fs::read_to_string("clippy_lints/Cargo.toml").expect("failed to read ./clippy_lints/Cargo.toml"); | ||
| let clippy_lints_lib_rs = | ||
| fs::read_to_string("clippy_lints/src/lib.rs").expect("failed to read ./clippy_lints/src/lib.rs"); | ||
| inject_deps_into_manifest( | ||
| &rustc_source_basedir, | ||
| "clippy_lints/Cargo.toml", | ||
| &clippy_lints_manifest, | ||
| &clippy_lints_lib_rs, | ||
| ) | ||
| .expect("Failed to inject deps into ./clippy_lints/Cargo.toml"); | ||
| } | ||
|
|
||
| fn inject_deps_into_manifest( | ||
| rustc_source_dir: &PathBuf, | ||
| manifest_path: &str, | ||
| cargo_toml: &str, | ||
| lib_rs: &str, | ||
| ) -> std::io::Result<()> { | ||
| let extern_crates = lib_rs | ||
| .lines() | ||
| // get the deps | ||
| .filter(|line| line.starts_with("extern crate")) | ||
| // we have something like "extern crate foo;", we only care about the "foo" | ||
| // ↓ ↓ | ||
| // extern crate rustc_middle; | ||
| .map(|s| &s[13..(s.len() - 1)]); | ||
|
|
||
| let new_deps = extern_crates.map(|dep| { | ||
| // format the dependencies that are going to be put inside the Cargo.toml | ||
| format!( | ||
| "{dep} = {{ path = \"{source_path}/lib{dep}\" }}\n", | ||
| dep = dep, | ||
| source_path = rustc_source_dir.display() | ||
| ) | ||
| }); | ||
|
|
||
| // format a new [dependencies]-block with the new deps we need to inject | ||
| let mut all_deps = String::from("[dependencies]\n"); | ||
| new_deps.for_each(|dep_line| { | ||
| all_deps.push_str(&dep_line); | ||
| }); | ||
|
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||
| // replace "[dependencies]" with | ||
| // [dependencies] | ||
| // dep1 = { path = ... } | ||
| // dep2 = { path = ... } | ||
| // etc | ||
| let new_manifest = cargo_toml.replacen("[dependencies]\n", &all_deps, 1); | ||
|
|
||
| // println!("{}", new_manifest); | ||
| let mut file = File::create(manifest_path)?; | ||
| file.write_all(new_manifest.as_bytes())?; | ||
|
|
||
| println!("Dependency paths injected: {}", manifest_path); | ||
|
|
||
| Ok(()) | ||
| } |
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