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-rw-r--r--askama_derive/src/generator.rs50
-rw-r--r--askama_derive/src/heritage.rs1
-rw-r--r--askama_derive/src/input.rs102
3 files changed, 95 insertions, 58 deletions
diff --git a/askama_derive/src/generator.rs b/askama_derive/src/generator.rs
index c1a8ebe..22f996f 100644
--- a/askama_derive/src/generator.rs
+++ b/askama_derive/src/generator.rs
@@ -1,8 +1,8 @@
use std::collections::hash_map::{Entry, HashMap};
-use std::path::{Path, PathBuf};
+use std::path::Path;
use std::{cmp, hash, mem, str};
-use crate::config::{get_template_source, WhitespaceHandling};
+use crate::config::WhitespaceHandling;
use crate::heritage::{Context, Heritage};
use crate::input::{Source, TemplateInput};
use crate::CompileError;
@@ -10,7 +10,7 @@ use crate::CompileError;
use parser::node::{
Call, Comment, CondTest, If, Include, Let, Lit, Loop, Match, Target, Whitespace, Ws,
};
-use parser::{Expr, Node, Parsed};
+use parser::{Expr, Node};
use quote::quote;
pub(crate) struct Generator<'a> {
@@ -20,8 +20,6 @@ pub(crate) struct Generator<'a> {
contexts: &'a HashMap<&'a Path, Context<'a>>,
// The heritage contains references to blocks and their ancestry
heritage: Option<&'a Heritage<'a>>,
- // Cache ASTs for included templates
- includes: HashMap<PathBuf, Parsed>,
// Variables accessible directly from the current scope (not redirected to context)
locals: MapChain<'a, &'a str, LocalMeta>,
// Suffix whitespace from the previous literal. Will be flushed to the
@@ -50,7 +48,6 @@ impl<'a> Generator<'a> {
input,
contexts,
heritage,
- includes: HashMap::default(),
locals,
next_ws: None,
skip_ws: WhitespaceHandling::Preserve,
@@ -846,24 +843,35 @@ impl<'a> Generator<'a> {
)?;
}
- // Since nodes must not outlive the Generator, we instantiate a nested `Generator` here to
- // handle the include's nodes. Unfortunately we can't easily share the `includes` cache.
+ // We clone the context of the child in order to preserve their macros and imports.
+ // But also add all the imports and macros from this template that don't override the
+ // child's ones to preserve this template's context.
+ let child_ctx = &mut self.contexts[path.as_path()].clone();
+ for (name, mac) in &ctx.macros {
+ child_ctx.macros.entry(name).or_insert(mac);
+ }
+ for (name, import) in &ctx.imports {
+ child_ctx
+ .imports
+ .entry(name)
+ .or_insert_with(|| import.clone());
+ }
- let locals = MapChain::with_parent(&self.locals);
- let mut child = Self::new(self.input, self.contexts, self.heritage, locals);
-
- let nodes = match self.contexts.get(path.as_path()) {
- Some(ctx) => ctx.nodes,
- None => match self.includes.entry(path) {
- Entry::Occupied(entry) => entry.into_mut().nodes(),
- Entry::Vacant(entry) => {
- let src = get_template_source(entry.key())?;
- entry.insert(Parsed::new(src, self.input.syntax)?).nodes()
- }
- },
+ // Create a new generator for the child, and call it like in `impl_template` as if it were
+ // a full template, while preserving the context.
+ let heritage = if !child_ctx.blocks.is_empty() || child_ctx.extends.is_some() {
+ Some(Heritage::new(child_ctx, self.contexts))
+ } else {
+ None
};
- let mut size_hint = child.handle(ctx, nodes, buf, AstLevel::Nested)?;
+ let handle_ctx = match &heritage {
+ Some(heritage) => heritage.root,
+ None => child_ctx,
+ };
+ let locals = MapChain::with_parent(&self.locals);
+ let mut child = Self::new(self.input, self.contexts, heritage.as_ref(), locals);
+ let mut size_hint = child.handle(handle_ctx, handle_ctx.nodes, buf, AstLevel::Top)?;
size_hint += child.write_buf_writable(buf)?;
self.prepare_ws(i.ws);
diff --git a/askama_derive/src/heritage.rs b/askama_derive/src/heritage.rs
index d75d0a5..bded66b 100644
--- a/askama_derive/src/heritage.rs
+++ b/askama_derive/src/heritage.rs
@@ -35,6 +35,7 @@ impl Heritage<'_> {
type BlockAncestry<'a> = HashMap<&'a str, Vec<(&'a Context<'a>, &'a BlockDef<'a>)>>;
+#[derive(Clone)]
pub(crate) struct Context<'a> {
pub(crate) nodes: &'a [Node<'a>],
pub(crate) extends: Option<PathBuf>,
diff --git a/askama_derive/src/input.rs b/askama_derive/src/input.rs
index 57fbc04..54facdc 100644
--- a/askama_derive/src/input.rs
+++ b/askama_derive/src/input.rs
@@ -113,46 +113,74 @@ impl TemplateInput<'_> {
let mut check = vec![(self.path.clone(), source)];
while let Some((path, source)) = check.pop() {
let parsed = Parsed::new(source, self.syntax)?;
- for n in parsed.nodes() {
- use Node::*;
- match n {
- Extends(extends) => {
- let extends = self.config.find_template(extends.path, Some(&path))?;
- let dependency_path = (path.clone(), extends.clone());
- if dependency_graph.contains(&dependency_path) {
- return Err(format!(
- "cyclic dependency in graph {:#?}",
- dependency_graph
- .iter()
- .map(|e| format!("{:#?} --> {:#?}", e.0, e.1))
- .collect::<Vec<String>>()
- )
- .into());
+
+ let mut top = true;
+ let mut nested = vec![parsed.nodes()];
+ while let Some(nodes) = nested.pop() {
+ for n in nodes {
+ use Node::*;
+ match n {
+ Extends(extends) if top => {
+ let extends = self.config.find_template(extends.path, Some(&path))?;
+ let dependency_path = (path.clone(), extends.clone());
+ if dependency_graph.contains(&dependency_path) {
+ return Err(format!(
+ "cyclic dependency in graph {:#?}",
+ dependency_graph
+ .iter()
+ .map(|e| format!("{:#?} --> {:#?}", e.0, e.1))
+ .collect::<Vec<String>>()
+ )
+ .into());
+ }
+ dependency_graph.push(dependency_path);
+ let source = get_template_source(&extends)?;
+ check.push((extends, source));
}
- dependency_graph.push(dependency_path);
- let source = get_template_source(&extends)?;
- check.push((extends, source));
- }
- Import(import) => {
- let import = self.config.find_template(import.path, Some(&path))?;
- let source = get_template_source(&import)?;
- check.push((import, source));
+ Macro(m) if top => {
+ nested.push(&m.nodes);
+ }
+ Import(import) if top => {
+ let import = self.config.find_template(import.path, Some(&path))?;
+ let source = get_template_source(&import)?;
+ check.push((import, source));
+ }
+ Include(include) => {
+ let include = self.config.find_template(include.path, Some(&path))?;
+ let source = get_template_source(&include)?;
+ check.push((include, source));
+ }
+ BlockDef(b) => {
+ nested.push(&b.nodes);
+ }
+ If(i) => {
+ for cond in &i.branches {
+ nested.push(&cond.nodes);
+ }
+ }
+ Loop(l) => {
+ nested.push(&l.body);
+ nested.push(&l.else_nodes);
+ }
+ Match(m) => {
+ for arm in &m.arms {
+ nested.push(&arm.nodes);
+ }
+ }
+ Lit(_)
+ | Comment(_)
+ | Expr(_, _)
+ | Call(_)
+ | Extends(_)
+ | Let(_)
+ | Import(_)
+ | Macro(_)
+ | Raw(_)
+ | Continue(_)
+ | Break(_) => {}
}
- If(_)
- | Loop(_)
- | Match(_)
- | BlockDef(_)
- | Include(_)
- | Lit(_)
- | Comment(_)
- | Expr(_, _)
- | Call(_)
- | Let(_)
- | Macro(_)
- | Raw(_)
- | Continue(_)
- | Break(_) => {}
}
+ top = false;
}
map.insert(path, parsed);
}
generated by cgit (git 2.34.1) at 2025-11-04 04:37:31 +0000