3 files changed, 18 insertions, 9 deletions

diff --git a/crates/ra_lsp_server/tests/heavy_tests/main.rs b/crates/ra_lsp_server/tests/heavy_tests/main.rs
index 152681062..2ba82ab05 100644
--- a/crates/ra_lsp_server/tests/heavy_tests/main.rs
+++ b/crates/ra_lsp_server/tests/heavy_tests/main.rs
@@ -286,7 +286,13 @@ fn test_missing_module_code_action_in_json_project() {
 
     let project = json!({
         "roots": [path],
-        "crates": [ { "root_module": path.join("src/lib.rs"), "deps": [], "edition": "2015" } ]
+        "crates": [ {
+            "root_module": path.join("src/lib.rs"),
+            "deps": [],
+            "edition": "2015",
+            "atom_cfgs": [],
+            "key_value_cfgs": {}
+        } ]
     });
 
     let code = format!(
diff --git a/crates/ra_project_model/src/json_project.rs b/crates/ra_project_model/src/json_project.rs
index b0d339f38..1bacb1d09 100644
--- a/crates/ra_project_model/src/json_project.rs
+++ b/crates/ra_project_model/src/json_project.rs
@@ -2,6 +2,7 @@
 
 use std::path::PathBuf;
 
+use rustc_hash::{FxHashMap, FxHashSet};
 use serde::Deserialize;
 
 /// A root points to the directory which contains Rust crates. rust-analyzer watches all files in
@@ -19,8 +20,8 @@ pub struct Crate {
     pub(crate) root_module: PathBuf,
     pub(crate) edition: Edition,
     pub(crate) deps: Vec<Dep>,
-    #[serde(default)]
-    pub(crate) features: Vec<String>,
+    pub(crate) atom_cfgs: FxHashSet<String>,
+    pub(crate) key_value_cfgs: FxHashMap<String, String>,
 }
 
 #[derive(Clone, Copy, Debug, Deserialize)]
diff --git a/crates/ra_project_model/src/lib.rs b/crates/ra_project_model/src/lib.rs
index 05e49f5ce..640a5ebd3 100644
--- a/crates/ra_project_model/src/lib.rs
+++ b/crates/ra_project_model/src/lib.rs
@@ -134,11 +134,13 @@ impl ProjectWorkspace {
                             json_project::Edition::Edition2015 => Edition::Edition2015,
                             json_project::Edition::Edition2018 => Edition::Edition2018,
                         };
-                        // FIXME: cfg options
-                        // Default to enable test for workspace crates.
-                        let cfg_options = default_cfg_options
-                            .clone()
-                            .features(krate.features.iter().map(Into::into));
+                        let mut cfg_options = default_cfg_options.clone();
+                        for name in &krate.atom_cfgs {
+                            cfg_options = cfg_options.atom(name.into());
+                        }
+                        for (key, value) in &krate.key_value_cfgs {
+                            cfg_options = cfg_options.key_value(key.into(), value.into());
+                        }
                         crates.insert(
                             crate_id,
                             crate_graph.add_crate_root(file_id, edition, cfg_options),
@@ -309,7 +311,7 @@ pub fn get_rustc_cfg_options() -> CfgOptions {
     let mut cfg_options = CfgOptions::default();
 
     match (|| -> Result<_> {
-        // `cfg(test)` ans `cfg(debug_assertion)` is handled outside, so we suppress them here.
+        // `cfg(test)` and `cfg(debug_assertion)` are handled outside, so we suppress them here.
         let output = Command::new("rustc").args(&["--print", "cfg", "-O"]).output()?;
         if !output.status.success() {
             Err("failed to get rustc cfgs")?;