5 files changed, 71 insertions, 44 deletions

diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index abdec602e..84c04ee72 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -56,28 +56,13 @@ jobs:
         with:
           command: test
 
-      - name: Prepare build directory for cache (UNIX)
-        if: matrix.os == 'ubuntu-latest' || matrix.os == 'macos-latest'
-        run: |
-          find ./target/debug -maxdepth 1 -type f -delete \
-          && rm -fr ./target/debug/{deps,.fingerprint}/{*ra_*,*heavy_test*,*gen_lsp*,*thread_worker*} \
-          && rm -f  ./target/.rustc_info.json \
-          && rm ./target/.slow_tests_cookie
+      - name: Prepare cache
+        run: cargo xtask pre-cache
 
-      - name: Prepare build directory for cache (Windows)
+      - name: Prepare cache 2
         if: matrix.os == 'windows-latest'
-        run: >-
-          (Get-ChildItem ./target/debug -Recurse -Depth 1 -File | Remove-Item) -and
-          (Remove-Item -Force -Recurse ./target/debug/deps/*ra_*) -and
-          (Remove-Item -Force -Recurse ./target/debug/deps/*heavy_test*) -and
-          (Remove-Item -Force -Recurse ./target/debug/deps/*gen_lsp*) -and
-          (Remove-Item -Force -Recurse ./target/debug/deps/*thread_worker*) -and
-          (Remove-Item -Force -Recurse ./target/debug/.fingerprint/*ra_*) -and
-          (Remove-Item -Force -Recurse ./target/debug/.fingerprint/*heavy_test*) -and
-          (Remove-Item -Force -Recurse ./target/debug/.fingerprint/*gen_lsp*) -and
-          (Remove-Item -Force -Recurse ./target/debug/.fingerprint/*thread_worker*) -and
-          (Remove-Item -Force ./target/.rustc_info.json) -and
-          (Remove-Item ./target/.slow_tests_cookie)
+        run: Remove-Item ./target/debug/xtask.exe
+
 
   type-script:
     name: TypeScript
diff --git a/Cargo.lock b/Cargo.lock
index 79f28f7cd..312240bd2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -54,7 +54,7 @@ name = "backtrace-sys"
 version = "0.1.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.48 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.49 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -115,7 +115,7 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.0.48"
+version = "1.0.49"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -402,12 +402,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "getrandom"
-version = "0.1.13"
+version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
- "wasi 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasi 0.9.0+wasi-snapshot-preview1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -466,7 +466,7 @@ dependencies = [
 
 [[package]]
 name = "inotify"
-version = "0.6.1"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -532,7 +532,7 @@ name = "jemalloc-sys"
 version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.48 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.49 (registry+https://github.com/rust-lang/crates.io-index)",
  "fs_extra 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -619,7 +619,7 @@ dependencies = [
 
 [[package]]
 name = "lsp-types"
-version = "0.68.0"
+version = "0.68.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "base64 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -700,15 +700,14 @@ dependencies = [
 
 [[package]]
 name = "notify"
-version = "4.0.14"
+version = "4.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "filetime 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "fsevent 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "fsevent-sys 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "inotify 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "inotify 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "mio 0.6.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "mio-extras 2.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -900,7 +899,7 @@ dependencies = [
  "insta 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "jod-thread 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "lsp-types 0.68.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lsp-types 0.68.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.44 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1064,7 +1063,7 @@ dependencies = [
  "jod-thread 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "lsp-server 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "lsp-types 0.68.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lsp-types 0.68.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ra_cargo_watch 0.1.0",
  "ra_ide 0.1.0",
@@ -1170,7 +1169,7 @@ dependencies = [
  "crossbeam-channel 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "jod-thread 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "notify 4.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "notify 4.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "relative-path 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1208,7 +1207,7 @@ name = "rand"
 version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "getrandom 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getrandom 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_chacha 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1252,7 +1251,7 @@ name = "rand_core"
 version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "getrandom 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getrandom 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1698,7 +1697,7 @@ dependencies = [
 
 [[package]]
 name = "wasi"
-version = "0.7.0"
+version = "0.9.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -1783,7 +1782,7 @@ dependencies = [
 "checksum byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a7c3dd8985a7111efc5c80b44e23ecdd8c007de8ade3b96595387e812b957cf5"
 "checksum c2-chacha 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "214238caa1bf3a496ec3392968969cab8549f96ff30652c9e56885329315f6bb"
 "checksum cargo_metadata 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)" = "46e3374c604fb39d1a2f35ed5e4a4e30e60d01fab49446e08f1b3e9a90aef202"
-"checksum cc 1.0.48 (registry+https://github.com/rust-lang/crates.io-index)" = "f52a465a666ca3d838ebbf08b241383421412fe7ebb463527bba275526d89f76"
+"checksum cc 1.0.49 (registry+https://github.com/rust-lang/crates.io-index)" = "e450b8da92aa6f274e7c6437692f9f2ce6d701fb73bacfcf87897b3f89a4c20e"
 "checksum cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 "checksum chalk-derive 0.1.0 (git+https://github.com/rust-lang/chalk.git?rev=ff65b5ac9860f3c36bd892c865ab23d5ff0bbae5)" = "<none>"
 "checksum chalk-engine 0.9.0 (git+https://github.com/rust-lang/chalk.git?rev=ff65b5ac9860f3c36bd892c865ab23d5ff0bbae5)" = "<none>"
@@ -1818,14 +1817,14 @@ dependencies = [
 "checksum fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
 "checksum fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
 "checksum fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
-"checksum getrandom 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)" = "e7db7ca94ed4cd01190ceee0d8a8052f08a247aa1b469a7f68c6a3b71afcf407"
+"checksum getrandom 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)" = "7abc8dd8451921606d809ba32e95b6111925cd2906060d2dcc29c070220503eb"
 "checksum globset 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "925aa2cac82d8834e2b2a4415b6f6879757fb5c0928fc445ae76461a12eed8f2"
 "checksum heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "20564e78d53d2bb135c343b3f47714a56af2061f1c928fdb541dc7b9fdd94205"
 "checksum hermit-abi 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "eff2656d88f158ce120947499e971d743c05dbcbed62e5bd2f38f1698bbc3772"
 "checksum humantime 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "df004cfca50ef23c36850aaaa59ad52cc70d0e90243c3c7737a4dd32dc7a3c4f"
 "checksum idna 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "02e2673c30ee86b5b96a9cb52ad15718aa1f966f5ab9ad54a8b95d5ca33120a9"
 "checksum indexmap 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712d7b3ea5827fcb9d4fda14bf4da5f136f0db2ae9c8f4bd4e2d1c6fde4e6db2"
-"checksum inotify 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "40b54539f3910d6f84fbf9a643efd6e3aa6e4f001426c0329576128255994718"
+"checksum inotify 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "24e40d6fd5d64e2082e0c796495c8ef5ad667a96d03e5aaa0becfd9d47bcbfb8"
 "checksum inotify-sys 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "e74a1aa87c59aeff6ef2cc2fa62d41bc43f54952f55652656b18a02fd5e356c0"
 "checksum insta 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0d499dc062e841590a67230d853bce62d0abeb91304927871670b7c55c461349"
 "checksum iovec 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b2b3ea6ff95e175473f8ffe6a7eb7c00d054240321b84c57051175fe3c1e075e"
@@ -1845,7 +1844,7 @@ dependencies = [
 "checksum lock_api 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "79b2de95ecb4691949fea4716ca53cdbcfccb2c612e19644a8bad05edcf9f47b"
 "checksum log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)" = "14b6052be84e6b71ab17edffc2eeabf5c2c3ae1fdb464aae35ac50c67a44e1f7"
 "checksum lsp-server 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "5383e043329615624bbf45e1ba27bd75c176762b2592855c659bc28ac580a06b"
-"checksum lsp-types 0.68.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1b08121a463f43ee67f09da45c0a61d447793adc8dc23e52b009e8cf80278a16"
+"checksum lsp-types 0.68.1 (registry+https://github.com/rust-lang/crates.io-index)" = "19b79f72914b929daa263483134b8974962cdebc731593b11508afb7f9acec80"
 "checksum matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "7ffc5c5338469d4d3ea17d269fa8ea3512ad247247c30bd2df69e68309ed0a08"
 "checksum memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "88579771288728879b57485cc7d6b07d648c9f0141eb955f8ab7f9d45394468e"
 "checksum memoffset 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "75189eb85871ea5c2e2c15abbdd541185f63b408415e5051f5cac122d8c774b9"
@@ -1853,7 +1852,7 @@ dependencies = [
 "checksum mio-extras 2.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "52403fe290012ce777c4626790c8951324a2b9e3316b3143779c72b029742f19"
 "checksum miow 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8c1f2f3b1cf331de6896aabf6e9d55dca90356cc9960cca7eaaf408a355ae919"
 "checksum net2 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)" = "42550d9fb7b6684a6d404d9fa7250c2eb2646df731d1c06afc06dcee9e1bcf88"
-"checksum notify 4.0.14 (registry+https://github.com/rust-lang/crates.io-index)" = "199628fc33b21bc767baa057490b00b382ecbae030803a7b36292422d15b778b"
+"checksum notify 4.0.15 (registry+https://github.com/rust-lang/crates.io-index)" = "80ae4a7688d1fab81c5bf19c64fc8db920be8d519ce6336ed4e7efe024724dbd"
 "checksum num-traits 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)" = "d4c81ffc11c212fa327657cb19dd85eb7419e163b5b076bede2bdb5c974c07e4"
 "checksum num_cpus 1.11.1 (registry+https://github.com/rust-lang/crates.io-index)" = "76dac5ed2a876980778b8b85f75a71b6cbf0db0b1232ee12f826bccb00d09d72"
 "checksum once_cell 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "891f486f630e5c5a4916c7e16c4b24a53e78c860b646e9f8e005e4f16847bfed"
@@ -1932,7 +1931,7 @@ dependencies = [
 "checksum uuid 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "9fde2f6a4bea1d6e007c4ad38c6839fa71cbb63b6dbf5b595aa38dc9b1093c11"
 "checksum version_check 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)" = "078775d0255232fb988e6fccf26ddc9d1ac274299aaedcedce21c6f72cc533ce"
 "checksum walkdir 2.2.9 (registry+https://github.com/rust-lang/crates.io-index)" = "9658c94fa8b940eab2250bd5a457f9c48b748420d71293b165c8cdbe2f55f71e"
-"checksum wasi 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b89c3ce4ce14bdc6fb6beaf9ec7928ca331de5df7e5ea278375642a2f478570d"
+"checksum wasi 0.9.0+wasi-snapshot-preview1 (registry+https://github.com/rust-lang/crates.io-index)" = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
 "checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
 "checksum winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
 "checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
diff --git a/crates/ra_lsp_server/src/caps.rs b/crates/ra_lsp_server/src/caps.rs
index adfc9fb2c..db502c200 100644
--- a/crates/ra_lsp_server/src/caps.rs
+++ b/crates/ra_lsp_server/src/caps.rs
@@ -56,6 +56,7 @@ pub fn server_capabilities() -> ServerCapabilities {
         color_provider: None,
         execute_command_provider: None,
         workspace: None,
+        call_hierarchy_provider: None,
         experimental: Default::default(),
     }
 }
diff --git a/xtask/src/lib.rs b/xtask/src/lib.rs
index b76278635..e46c21db7 100644
--- a/xtask/src/lib.rs
+++ b/xtask/src/lib.rs
@@ -9,7 +9,7 @@ mod ast_src;
 
 use anyhow::Context;
 use std::{
-    env,
+    env, fs,
     path::{Path, PathBuf},
     process::{Command, Stdio},
 };
@@ -101,3 +101,41 @@ pub fn run_fuzzer() -> Result<()> {
 
     run("rustup run nightly -- cargo fuzz run parser", "./crates/ra_syntax")
 }
+
+/// Cleans the `./target` dir after the build such that only
+/// dependencies are cached on CI.
+pub fn run_pre_cache() -> Result<()> {
+    let slow_tests_cookie = Path::new("./target/.slow_tests_cookie");
+    if !slow_tests_cookie.exists() {
+        panic!("slow tests were skipped on CI!")
+    }
+    rm_rf(slow_tests_cookie)?;
+
+    for entry in Path::new("./target/debug").read_dir()? {
+        let entry = entry?;
+        if entry.file_type().map(|it| it.is_file()).ok() == Some(true) {
+            // Can't delete yourself on windows :-(
+            if !entry.path().ends_with("xtask.exe") {
+                rm_rf(&entry.path())?
+            }
+        }
+    }
+
+    fs::remove_file("./target/.rustc_info.json")?;
+    let to_delete = ["ra_", "heavy_test"];
+    for &dir in ["./target/debug/deps", "target/debug/.fingerprint"].iter() {
+        for entry in Path::new(dir).read_dir()? {
+            let entry = entry?;
+            if to_delete.iter().any(|&it| entry.path().display().to_string().contains(it)) {
+                rm_rf(&entry.path())?
+            }
+        }
+    }
+
+    Ok(())
+}
+
+fn rm_rf(path: &Path) -> Result<()> {
+    if path.is_file() { fs::remove_file(path) } else { fs::remove_dir_all(path) }
+        .with_context(|| format!("failed to remove {:?}", path))
+}
diff --git a/xtask/src/main.rs b/xtask/src/main.rs
index 9309b2fbd..053453e6e 100644
--- a/xtask/src/main.rs
+++ b/xtask/src/main.rs
@@ -14,7 +14,7 @@ use pico_args::Arguments;
 use xtask::{
     codegen::{self, Mode},
     install::{ClientOpt, InstallCmd, ServerOpt},
-    pre_commit, run_clippy, run_fuzzer, run_rustfmt, Result,
+    pre_commit, run_clippy, run_fuzzer, run_pre_cache, run_rustfmt, Result,
 };
 
 fn main() -> Result<()> {
@@ -88,6 +88,10 @@ FLAGS:
             args.finish()?;
             run_fuzzer()
         }
+        "pre-cache" => {
+            args.finish()?;
+            run_pre_cache()
+        }
         _ => {
             eprintln!(
                 "\