7 files changed, 105 insertions, 4 deletions

diff --git a/crates/ra_lsp_server/Cargo.toml b/crates/ra_lsp_server/Cargo.toml
index be7982b2a..da523ba8a 100644
--- a/crates/ra_lsp_server/Cargo.toml
+++ b/crates/ra_lsp_server/Cargo.toml
@@ -12,6 +12,7 @@ anyhow = "1.0"
 crossbeam-channel = "0.4"
 either = "1.5"
 env_logger = { version = "0.7.1", default-features = false }
+globset = "0.4.4"
 itertools = "0.8.0"
 jod-thread = "0.1.0"
 log = "0.4.3"
@@ -33,7 +34,6 @@ ra_project_model = { path = "../ra_project_model" }
 ra_syntax = { path = "../ra_syntax" }
 ra_text_edit = { path = "../ra_text_edit" }
 ra_vfs = "0.5.0"
-ra_vfs_glob = { path = "../ra_vfs_glob" }
 
 # This should only be used in CLI
 ra_db = { path = "../ra_db" }
diff --git a/crates/ra_lsp_server/src/args.rs b/crates/ra_lsp_server/src/args.rs
index 41959797c..89e2139ce 100644
--- a/crates/ra_lsp_server/src/args.rs
+++ b/crates/ra_lsp_server/src/args.rs
@@ -1,3 +1,8 @@
+//! Command like parsing for rust-analyzer.
+//!
+//! If run started args, we run the LSP server loop. With a subcommand, we do a
+//! one-time batch processing.
+
 use anyhow::{bail, Result};
 use pico_args::Arguments;
 use ra_lsp_server::cli::{BenchWhat, Position, Verbosity};
diff --git a/crates/ra_lsp_server/src/cli/load_cargo.rs b/crates/ra_lsp_server/src/cli/load_cargo.rs
index b9a4e6aba..bb3e1513b 100644
--- a/crates/ra_lsp_server/src/cli/load_cargo.rs
+++ b/crates/ra_lsp_server/src/cli/load_cargo.rs
@@ -7,9 +7,10 @@ use ra_db::{CrateGraph, FileId, SourceRootId};
 use ra_ide::{AnalysisChange, AnalysisHost, FeatureFlags};
 use ra_project_model::{get_rustc_cfg_options, PackageRoot, ProjectWorkspace};
 use ra_vfs::{RootEntry, Vfs, VfsChange, VfsTask, Watch};
-use ra_vfs_glob::RustPackageFilterBuilder;
 use rustc_hash::FxHashMap;
 
+use crate::vfs_glob::RustPackageFilterBuilder;
+
 use anyhow::Result;
 
 fn vfs_file_to_id(f: ra_vfs::VfsFile) -> FileId {
diff --git a/crates/ra_lsp_server/src/lib.rs b/crates/ra_lsp_server/src/lib.rs
index 2832b2605..958c70fe5 100644
--- a/crates/ra_lsp_server/src/lib.rs
+++ b/crates/ra_lsp_server/src/lib.rs
@@ -23,6 +23,7 @@ macro_rules! print {
     };
 }
 
+mod vfs_glob;
 mod caps;
 mod cargo_target_spec;
 mod conv;
diff --git a/crates/ra_lsp_server/src/main_loop.rs b/crates/ra_lsp_server/src/main_loop.rs
index 7ae2e1e6f..944074118 100644
--- a/crates/ra_lsp_server/src/main_loop.rs
+++ b/crates/ra_lsp_server/src/main_loop.rs
@@ -135,7 +135,7 @@ pub fn main_loop(
         let globs = config
             .exclude_globs
             .iter()
-            .map(|glob| ra_vfs_glob::Glob::new(glob))
+            .map(|glob| crate::vfs_glob::Glob::new(glob))
             .collect::<std::result::Result<Vec<_>, _>>()?;
 
         if config.use_client_watching {
diff --git a/crates/ra_lsp_server/src/vfs_glob.rs b/crates/ra_lsp_server/src/vfs_glob.rs
new file mode 100644
index 000000000..12401d75a
--- /dev/null
+++ b/crates/ra_lsp_server/src/vfs_glob.rs
@@ -0,0 +1,94 @@
+//! `ra_vfs_glob` crate implements exclusion rules for vfs.
+//!
+//! By default, we include only `.rs` files, and skip some know offenders like
+//! `/target` or `/node_modules` altogether.
+//!
+//! It's also possible to add custom exclusion globs.
+
+use globset::{GlobSet, GlobSetBuilder};
+use ra_vfs::{Filter, RelativePath};
+
+pub use globset::{Glob, GlobBuilder};
+
+const ALWAYS_IGNORED: &[&str] = &["target/**", "**/node_modules/**", "**/.git/**"];
+const IGNORED_FOR_NON_MEMBERS: &[&str] = &["examples/**", "tests/**", "benches/**"];
+
+pub struct RustPackageFilterBuilder {
+    is_member: bool,
+    exclude: GlobSetBuilder,
+}
+
+impl Default for RustPackageFilterBuilder {
+    fn default() -> RustPackageFilterBuilder {
+        RustPackageFilterBuilder { is_member: false, exclude: GlobSetBuilder::new() }
+    }
+}
+
+impl RustPackageFilterBuilder {
+    pub fn set_member(mut self, is_member: bool) -> RustPackageFilterBuilder {
+        self.is_member = is_member;
+        self
+    }
+    pub fn exclude(mut self, glob: Glob) -> RustPackageFilterBuilder {
+        self.exclude.add(glob);
+        self
+    }
+    pub fn into_vfs_filter(self) -> Box<dyn Filter> {
+        let RustPackageFilterBuilder { is_member, mut exclude } = self;
+        for &glob in ALWAYS_IGNORED {
+            exclude.add(Glob::new(glob).unwrap());
+        }
+        if !is_member {
+            for &glob in IGNORED_FOR_NON_MEMBERS {
+                exclude.add(Glob::new(glob).unwrap());
+            }
+        }
+        Box::new(RustPackageFilter { exclude: exclude.build().unwrap() })
+    }
+}
+
+struct RustPackageFilter {
+    exclude: GlobSet,
+}
+
+impl Filter for RustPackageFilter {
+    fn include_dir(&self, dir_path: &RelativePath) -> bool {
+        !self.exclude.is_match(dir_path.as_str())
+    }
+
+    fn include_file(&self, file_path: &RelativePath) -> bool {
+        file_path.extension() == Some("rs")
+    }
+}
+
+#[test]
+fn test_globs() {
+    let filter = RustPackageFilterBuilder::default().set_member(true).into_vfs_filter();
+
+    assert!(filter.include_dir(RelativePath::new("src/tests")));
+    assert!(filter.include_dir(RelativePath::new("src/target")));
+    assert!(filter.include_dir(RelativePath::new("tests")));
+    assert!(filter.include_dir(RelativePath::new("benches")));
+
+    assert!(!filter.include_dir(RelativePath::new("target")));
+    assert!(!filter.include_dir(RelativePath::new("src/foo/.git")));
+    assert!(!filter.include_dir(RelativePath::new("foo/node_modules")));
+
+    let filter = RustPackageFilterBuilder::default().set_member(false).into_vfs_filter();
+
+    assert!(filter.include_dir(RelativePath::new("src/tests")));
+    assert!(filter.include_dir(RelativePath::new("src/target")));
+
+    assert!(!filter.include_dir(RelativePath::new("target")));
+    assert!(!filter.include_dir(RelativePath::new("src/foo/.git")));
+    assert!(!filter.include_dir(RelativePath::new("foo/node_modules")));
+    assert!(!filter.include_dir(RelativePath::new("tests")));
+    assert!(!filter.include_dir(RelativePath::new("benches")));
+
+    let filter = RustPackageFilterBuilder::default()
+        .set_member(true)
+        .exclude(Glob::new("src/llvm-project/**").unwrap())
+        .into_vfs_filter();
+
+    assert!(!filter.include_dir(RelativePath::new("src/llvm-project/clang")));
+}
diff --git a/crates/ra_lsp_server/src/world.rs b/crates/ra_lsp_server/src/world.rs
index d993c5fc4..71c95d4af 100644
--- a/crates/ra_lsp_server/src/world.rs
+++ b/crates/ra_lsp_server/src/world.rs
@@ -19,12 +19,12 @@ use ra_ide::{
 };
 use ra_project_model::{get_rustc_cfg_options, ProjectWorkspace};
 use ra_vfs::{LineEndings, RootEntry, Vfs, VfsChange, VfsFile, VfsRoot, VfsTask, Watch};
-use ra_vfs_glob::{Glob, RustPackageFilterBuilder};
 use relative_path::RelativePathBuf;
 
 use crate::{
     diagnostics::{CheckFixes, DiagnosticCollection},
     main_loop::pending_requests::{CompletedRequest, LatestRequests},
+    vfs_glob::{Glob, RustPackageFilterBuilder},
     LspError, Result,
 };