From 6b5d90972ae2f288ae7cf57e209c0d5d8c7a1fd2 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Sun, 17 Feb 2019 19:46:55 +0300
Subject: move roots to a module

---
 crates/ra_vfs/src/lib.rs | 108 +++++------------------------------------------
 1 file changed, 10 insertions(+), 98 deletions(-)

(limited to 'crates/ra_vfs/src/lib.rs')

diff --git a/crates/ra_vfs/src/lib.rs b/crates/ra_vfs/src/lib.rs
index cfdc1275f..a740e82ef 100644
--- a/crates/ra_vfs/src/lib.rs
+++ b/crates/ra_vfs/src/lib.rs
@@ -15,10 +15,10 @@
 //! VFS is based on a concept of roots: a set of directories on the file system
 //! which are watched for changes. Typically, there will be a root for each
 //! Cargo package.
+mod roots;
 mod io;
 
 use std::{
-    cmp::Reverse,
     fmt, fs, mem,
     path::{Path, PathBuf},
     sync::Arc,
@@ -26,106 +26,18 @@ use std::{
 
 use crossbeam_channel::Receiver;
 use ra_arena::{impl_arena_id, Arena, RawId, map::ArenaMap};
-use relative_path::{Component, RelativePath, RelativePathBuf};
+use relative_path::{RelativePath, RelativePathBuf};
 use rustc_hash::{FxHashMap, FxHashSet};
 
-pub use crate::io::TaskResult as VfsTask;
-use io::{TaskResult, Worker};
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
-pub struct VfsRoot(pub RawId);
-impl_arena_id!(VfsRoot);
-
-/// Describes the contents of a single source root.
-///
-/// `RootConfig` can be thought of as a glob pattern like `src/**.rs` which
-/// specifies the source root or as a function which takes a `PathBuf` and
-/// returns `true` iff path belongs to the source root
-pub(crate) struct RootConfig {
-    root: PathBuf,
-    // result of `root.canonicalize()` if that differs from `root`; `None` otherwise.
-    canonical_root: Option<PathBuf>,
-    excluded_dirs: Vec<PathBuf>,
-}
-
-pub(crate) struct Roots {
-    roots: Arena<VfsRoot, Arc<RootConfig>>,
-}
-
-impl std::ops::Deref for Roots {
-    type Target = Arena<VfsRoot, Arc<RootConfig>>;
-    fn deref(&self) -> &Self::Target {
-        &self.roots
-    }
-}
-
-impl RootConfig {
-    fn new(root: PathBuf, excluded_dirs: Vec<PathBuf>) -> RootConfig {
-        let mut canonical_root = root.canonicalize().ok();
-        if Some(&root) == canonical_root.as_ref() {
-            canonical_root = None;
-        }
-        RootConfig { root, canonical_root, excluded_dirs }
-    }
-    /// Checks if root contains a path and returns a root-relative path.
-    pub(crate) fn contains(&self, path: &Path) -> Option<RelativePathBuf> {
-        // First, check excluded dirs
-        if self.excluded_dirs.iter().any(|it| path.starts_with(it)) {
-            return None;
-        }
-        let rel_path = path
-            .strip_prefix(&self.root)
-            .or_else(|err_payload| {
-                self.canonical_root
-                    .as_ref()
-                    .map_or(Err(err_payload), |canonical_root| path.strip_prefix(canonical_root))
-            })
-            .ok()?;
-        let rel_path = RelativePathBuf::from_path(rel_path).ok()?;
-
-        // Ignore some common directories.
-        //
-        // FIXME: don't hard-code, specify at source-root creation time using
-        // gitignore
-        for (i, c) in rel_path.components().enumerate() {
-            if let Component::Normal(c) = c {
-                if (i == 0 && c == "target") || c == ".git" || c == "node_modules" {
-                    return None;
-                }
-            }
-        }
-
-        if path.is_file() && rel_path.extension() != Some("rs") {
-            return None;
-        }
-
-        Some(rel_path)
-    }
-}
+use crate::{
+    io::{TaskResult, Worker},
+    roots::{RootConfig, Roots},
+};
 
-impl Roots {
-    pub(crate) fn new(mut paths: Vec<PathBuf>) -> Roots {
-        let mut roots = Arena::default();
-        // A hack to make nesting work.
-        paths.sort_by_key(|it| Reverse(it.as_os_str().len()));
-        paths.dedup();
-        for (i, path) in paths.iter().enumerate() {
-            let nested_roots = paths[..i]
-                .iter()
-                .filter(|it| it.starts_with(path))
-                .map(|it| it.clone())
-                .collect::<Vec<_>>();
-
-            let config = Arc::new(RootConfig::new(path.clone(), nested_roots));
-
-            roots.alloc(config.clone());
-        }
-        Roots { roots }
-    }
-    pub(crate) fn find(&self, path: &Path) -> Option<(VfsRoot, RelativePathBuf)> {
-        self.roots.iter().find_map(|(root, data)| data.contains(path).map(|it| (root, it)))
-    }
-}
+pub use crate::{
+    io::TaskResult as VfsTask,
+    roots::VfsRoot,
+};
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct VfsFile(pub RawId);
-- 
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