Preparation for sharing

- rustfmt
- clippy
- comments
- README

src/pipeline/project_tree/mod.rs

@@ -1,38 +1,30 @@
-/* FILE SEPARATION BOUNDARY
+// FILE SEPARATION BOUNDARY
+//
+// Collect all operators accessible in each file, parse the files with
+// correct tokenization, resolve glob imports, convert expressions to
+// refer to tokens with (local) absolute path, and connect them into a
+// single tree.
+//
+// The module checks for imports from missing modules (including
+// submodules). All other errors must be checked later.
+//
+// Injection strategy:
+// Return all items of the given module in the injected tree for
+// `injected` The output of this stage is a tree, which can simply be
+// overlaid with the injected tree
 
-Collect all operators accessible in each file, parse the files with
-correct tokenization, resolve glob imports, convert expressions to
-refer to tokens with (local) absolute path, and connect them into a
-single tree.
-
-The module checks for imports from missing modules (including submodules).
-All other errors must be checked later.
-
-Injection strategy:
-Return all items of the given module in the injected tree for `injected`
-The output of this stage is a tree, which can simply be overlaid with
-the injected tree
-*/
-
-mod collect_ops;
-mod parse_file;
+mod add_prelude;
 mod build_tree;
+mod collect_ops;
+mod const_tree;
 mod normalize_imports;
+mod parse_file;
 mod prefix;
 mod tree;
-mod const_tree;
-mod add_prelude;
 
+pub use build_tree::{build_tree, split_path};
 pub use collect_ops::InjectedOperatorsFn;
-
-pub use const_tree::{
-  ConstTree, from_const_tree,
-};
-
+pub use const_tree::{from_const_tree, ConstTree};
 pub use tree::{
-  ProjectExt, ProjectModule, ProjectTree, collect_consts, collect_rules
+  collect_consts, collect_rules, ProjectExt, ProjectModule, ProjectTree,
 };
-
-pub use build_tree::{
-  build_tree, split_path
-};