mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-12-21 10:33:27 +00:00
97 lines
3.4 KiB
Rust
97 lines
3.4 KiB
Rust
//! lint on missing cargo common metadata
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use std::path::PathBuf;
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use crate::utils::{run_lints, span_lint};
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use rustc_hir::{hir_id::CRATE_HIR_ID, Crate};
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use rustc_lint::{LateContext, LateLintPass};
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use rustc_session::{declare_lint_pass, declare_tool_lint};
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use rustc_span::source_map::DUMMY_SP;
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declare_clippy_lint! {
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/// **What it does:** Checks to see if all common metadata is defined in
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/// `Cargo.toml`. See: https://rust-lang-nursery.github.io/api-guidelines/documentation.html#cargotoml-includes-all-common-metadata-c-metadata
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///
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/// **Why is this bad?** It will be more difficult for users to discover the
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/// purpose of the crate, and key information related to it.
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///
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/// **Known problems:** None.
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///
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/// **Example:**
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/// ```toml
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/// # This `Cargo.toml` is missing an authors field:
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/// [package]
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/// name = "clippy"
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/// version = "0.0.212"
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/// authors = ["Someone <someone@rust-lang.org>"]
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/// description = "A bunch of helpful lints to avoid common pitfalls in Rust"
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/// repository = "https://github.com/rust-lang/rust-clippy"
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/// readme = "README.md"
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/// license = "MIT OR Apache-2.0"
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/// keywords = ["clippy", "lint", "plugin"]
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/// categories = ["development-tools", "development-tools::cargo-plugins"]
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/// ```
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pub CARGO_COMMON_METADATA,
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cargo,
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"common metadata is defined in `Cargo.toml`"
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}
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fn missing_warning(cx: &LateContext<'_>, package: &cargo_metadata::Package, field: &str) {
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let message = format!("package `{}` is missing `{}` metadata", package.name, field);
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span_lint(cx, CARGO_COMMON_METADATA, DUMMY_SP, &message);
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}
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fn is_empty_str(value: &Option<String>) -> bool {
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value.as_ref().map_or(true, String::is_empty)
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}
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fn is_empty_path(value: &Option<PathBuf>) -> bool {
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value.as_ref().and_then(|x| x.to_str()).map_or(true, str::is_empty)
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}
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fn is_empty_vec(value: &[String]) -> bool {
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// This works because empty iterators return true
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value.iter().all(String::is_empty)
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}
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declare_lint_pass!(CargoCommonMetadata => [CARGO_COMMON_METADATA]);
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impl LateLintPass<'_> for CargoCommonMetadata {
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fn check_crate(&mut self, cx: &LateContext<'_>, _: &Crate<'_>) {
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if !run_lints(cx, &[CARGO_COMMON_METADATA], CRATE_HIR_ID) {
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return;
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}
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let metadata = unwrap_cargo_metadata!(cx, CARGO_COMMON_METADATA, false);
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for package in metadata.packages {
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if is_empty_vec(&package.authors) {
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missing_warning(cx, &package, "package.authors");
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}
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if is_empty_str(&package.description) {
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missing_warning(cx, &package, "package.description");
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}
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if is_empty_str(&package.license) && is_empty_path(&package.license_file) {
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missing_warning(cx, &package, "either package.license or package.license_file");
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}
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if is_empty_str(&package.repository) {
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missing_warning(cx, &package, "package.repository");
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}
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if is_empty_path(&package.readme) {
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missing_warning(cx, &package, "package.readme");
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}
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if is_empty_vec(&package.keywords) {
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missing_warning(cx, &package, "package.keywords");
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}
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if is_empty_vec(&package.categories) {
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missing_warning(cx, &package, "package.categories");
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}
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}
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}
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}
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