Isolate proc-macro dependency to the proc macro

The dependency of askama on askama_shared on syn on libproc_macro used
to mean libproc_macro would be dynamically linked into any crate using
askama. We want only askama_derive to have a runtime dependency on proc
macro. This commit moves all proc macro code from askama_shared into
askama_derive so that the askama crate no longer dynamically links
libproc_macro.

4 files changed, 2 insertions, 75 deletions

diff --git a/askama_shared/src/generator.rs b/askama_derive/src/generator.rs
index 8a112c8..357bd0f 100644
--- a/askama_shared/src/generator.rs
+++ b/askama_derive/src/generator.rs
@@ -1,7 +1,6 @@
-use filters;
 use input::TemplateInput;
 use parser::{self, Cond, Expr, Macro, MatchParameter, MatchVariant, Node, Target, When, WS};
-use path;
+use shared::{filters, path};
 
 use quote::{ToTokens, Tokens};
 
diff --git a/askama_shared/src/input.rs b/askama_derive/src/input.rs
index 5869af0..b2b815b 100644
--- a/askama_shared/src/input.rs
+++ b/askama_derive/src/input.rs
@@ -1,4 +1,4 @@
-use path;
+use shared::path;
 
 use std::path::{Path, PathBuf};
 
diff --git a/askama_shared/src/parser.rs b/askama_derive/src/parser.rs
index 402801f..402801f 100644
--- a/askama_shared/src/parser.rs
+++ b/askama_derive/src/parser.rs
diff --git a/askama_shared/src/lib.rs b/askama_shared/src/lib.rs
index 1f145f2..3213778 100644
--- a/askama_shared/src/lib.rs
+++ b/askama_shared/src/lib.rs
@@ -2,12 +2,6 @@
 
 #[macro_use]
 extern crate error_chain;
-#[macro_use]
-extern crate nom;
-#[macro_use]
-extern crate quote;
-#[macro_use(parse_quote)]
-extern crate syn;
 
 #[cfg(feature = "serde-json")]
 extern crate serde;
@@ -20,72 +14,6 @@ pub mod filters;
 pub mod path;
 
 mod escaping;
-mod generator;
-mod input;
-mod parser;
-
-use input::Print;
-use parser::{Macro, Node};
-
-use std::borrow::Cow;
-use std::collections::HashMap;
-use std::path::Path;
-
-/// Takes a `syn::DeriveInput` and generates source code for it
-///
-/// Reads the metadata from the `template()` attribute to get the template
-/// metadata, then fetches the source from the filesystem. The source is
-/// parsed, and the parse tree is fed to the code generator. Will print
-/// the parse tree and/or generated source according to the `print` key's
-/// value as passed to the `template()` attribute.
-pub fn build_template(ast: &syn::DeriveInput) -> String {
-    let data = input::TemplateInput::new(ast);
-    let nodes = parser::parse(data.source.as_ref());
-    let imports = Imports::new(&nodes, &data.path);
-    if data.meta.print == Print::Ast || data.meta.print == Print::All {
-        println!("{:?}", nodes);
-    }
-    let code = generator::generate(&data, &nodes, &imports.macro_map());
-    if data.meta.print == Print::Code || data.meta.print == Print::All {
-        println!("{}", code);
-    }
-    code
-}
-
-
-pub struct Imports<'a> {
-    pub sources: HashMap<&'a str, Cow<'a, str>>,
-}
-
-impl<'a> Imports<'a> {
-    pub fn new(parent_nodes: &'a [Node], parent_path: &'a Path) -> Imports<'a> {
-        let sources = parent_nodes.iter().filter_map(|n| {
-            match *n {
-                Node::Import(_, import_path, scope) => {
-                    let path = path::find_template_from_path(import_path, Some(parent_path));
-                    let src = path::get_template_source(&path);
-                    Some((scope, Cow::Owned(src)))
-                },
-                _ => None,
-            }
-        }).collect();
-        Imports { sources }
-    }
-
-    pub fn macro_map(&'a self) -> HashMap<(&'a str, &'a str), Macro<'a>> {
-        let mut macro_map = HashMap::new();
-        for (scope, s) in &self.sources {
-            for n in parser::parse(s.as_ref()) {
-                match n {
-                    Node::Macro(name, m) => macro_map.insert((*scope, name), m),
-                    _ => None,
-                };
-            }
-        }
-        macro_map
-    }
-}
-
 
 mod errors {
     error_chain! {