rust-analyzer: enable check by default

pkgs/development/tools/rust/rust-analyzer/default.nix

@@ -1,8 +1,7 @@
 { lib, stdenv, fetchFromGitHub, rustPlatform, CoreServices, cmake
 , libiconv
 , useMimalloc ? false
-# FIXME: Test doesn't pass under rustc 1.52.1 due to different escaping of `'` in string.
+, doCheck ? true
-, doCheck ? false
 }:
 
 rustPlatform.buildRustPackage rec {
@@ -17,9 +16,16 @@ rustPlatform.buildRustPackage rec {
     sha256 = "sha256-6Tbgy77Essi3Hyd5kdJ7JJbx7RuFZQWURfRrpScvPPQ=";
   };
 
+  patches = [
+    # Code format and git history check require more dependencies but don't really matter for packaging.
+    # So just ignore them.
+    ./ignore-git-and-rustfmt-tests.patch
+  ];
+
   buildAndTestSubdir = "crates/rust-analyzer";
 
   cargoBuildFlags = lib.optional useMimalloc "--features=mimalloc";
+  cargoTestFlags = lib.optional useMimalloc "--features=mimalloc";
 
   nativeBuildInputs = lib.optional useMimalloc cmake;
 

pkgs/development/tools/rust/rust-analyzer/ignore-git-and-rustfmt-tests.patch

@@ -0,0 +1,18 @@
+--- a/crates/rust-analyzer/tests/slow-tests/tidy.rs
++++ b/crates/rust-analyzer/tests/slow-tests/tidy.rs
+@@ -6,6 +6,7 @@ use std::{
+ use xshell::{cmd, pushd, pushenv, read_file};
+ 
+ #[test]
++#[ignore]
+ fn check_code_formatting() {
+     let _dir = pushd(sourcegen::project_root()).unwrap();
+     let _e = pushenv("RUSTUP_TOOLCHAIN", "stable");
+@@ -138,6 +139,7 @@ fn check_cargo_toml(path: &Path, text: String) -> () {
+ }
+ 
+ #[test]
++#[ignore]
+ fn check_merge_commits() {
+     let stdout = cmd!("git rev-list --merges --invert-grep --author 'bors\\[bot\\]' HEAD~19..")
+         .read()