Added competition for unstable features

Added xtask for download unstable book from rust repository and codegene for it. Also small changes from lint 

1 files changed, 8 insertions, 0 deletions

diff --git a/xtask/src/codegen.rs b/xtask/src/codegen.rs
index f5f4b964a..209caacc3 100644
--- a/xtask/src/codegen.rs
+++ b/xtask/src/codegen.rs
@@ -9,6 +9,7 @@ mod gen_syntax;
 mod gen_parser_tests;
 mod gen_assists_docs;
 mod gen_feature_docs;
+mod gen_unstable_future_descriptor;
 
 use std::{
     fmt, mem,
@@ -22,8 +23,12 @@ pub use self::{
     gen_feature_docs::generate_feature_docs,
     gen_parser_tests::generate_parser_tests,
     gen_syntax::generate_syntax,
+    gen_unstable_future_descriptor::generate_unstable_future_descriptor,
 };
 
+// Directory used by xtask 
+const STORAGE: &str = ".xtask";
+
 const GRAMMAR_DIR: &str = "crates/ra_parser/src/grammar";
 const OK_INLINE_TESTS_DIR: &str = "crates/ra_syntax/test_data/parser/inline/ok";
 const ERR_INLINE_TESTS_DIR: &str = "crates/ra_syntax/test_data/parser/inline/err";
@@ -35,6 +40,9 @@ const AST_TOKENS: &str = "crates/ra_syntax/src/ast/generated/tokens.rs";
 const ASSISTS_DIR: &str = "crates/ra_assists/src/handlers";
 const ASSISTS_TESTS: &str = "crates/ra_assists/src/tests/generated.rs";
 
+const REPOSITORY_URL: &str = "https://github.com/rust-lang/rust";
+const UNSTABLE_FEATURE: &str = "crates/ra_ide/src/completion/unstable_feature_descriptor.rs";
+
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
 pub enum Mode {
     Overwrite,