use crate::utils::{match_def_path, paths, snippet, span_lint_and_sugg}; use if_chain::if_chain; use rustc_errors::Applicability; use rustc_hir::{Expr, ExprKind}; use rustc_lint::{LateContext, LateLintPass}; use rustc_session::{declare_lint_pass, declare_tool_lint}; declare_clippy_lint! { /// **What it does:** Checks usage of `std::fs::create_dir` and suggest using `std::fs::create_dir_all` instead. /// /// **Why is this bad?** Sometimes `std::fs::crate_dir` is mistakenly chosen over `std::fs::create_dir_all`. /// /// **Known problems:** None. /// /// **Example:** /// /// ```rust /// std::fs::create_dir("foo"); /// ``` /// Use instead: /// ```rust /// std::fs::create_dir_all("foo"); /// ``` pub CREATE_DIR, restriction, "calling `std::fs::create_dir` instead of `std::fs::create_dir_all`" } declare_lint_pass!(CreateDir => [CREATE_DIR]); impl LateLintPass<'_> for CreateDir { fn check_expr(&mut self, cx: &LateContext<'_>, expr: &Expr<'_>) { if_chain! { if let ExprKind::Call(ref func, ref args) = expr.kind; if let ExprKind::Path(ref path) = func.kind; if let Some(def_id) = cx.qpath_res(path, func.hir_id).opt_def_id(); if match_def_path(cx, def_id, &paths::STD_FS_CREATE_DIR); then { span_lint_and_sugg( cx, CREATE_DIR, expr.span, "calling `std::fs::create_dir` where there may be a better way", "consider calling `std::fs::create_dir_all` instead", format!("create_dir_all({})", snippet(cx, args[0].span, "..")), Applicability::MaybeIncorrect, ) } } } }