From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 vendor/askama_derive/src/lib.rs | 121 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 vendor/askama_derive/src/lib.rs

(limited to 'vendor/askama_derive/src')

diff --git a/vendor/askama_derive/src/lib.rs b/vendor/askama_derive/src/lib.rs
new file mode 100644
index 000000000..35070fe80
--- /dev/null
+++ b/vendor/askama_derive/src/lib.rs
@@ -0,0 +1,121 @@
+#![deny(elided_lifetimes_in_paths)]
+
+use askama_shared::heritage::{Context, Heritage};
+use askama_shared::input::{Print, Source, TemplateInput};
+use askama_shared::parser::{parse, Expr, Node};
+use askama_shared::{
+    generator, get_template_source, read_config_file, CompileError, Config, Integrations,
+};
+use proc_macro::TokenStream;
+use proc_macro2::Span;
+
+use std::collections::HashMap;
+use std::path::PathBuf;
+
+#[proc_macro_derive(Template, attributes(template))]
+pub fn derive_template(input: TokenStream) -> TokenStream {
+    let ast: syn::DeriveInput = syn::parse(input).unwrap();
+    match build_template(&ast) {
+        Ok(source) => source.parse().unwrap(),
+        Err(e) => syn::Error::new(Span::call_site(), e)
+            .to_compile_error()
+            .into(),
+    }
+}
+
+/// 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.
+fn build_template(ast: &syn::DeriveInput) -> Result<String, CompileError> {
+    let config_toml = read_config_file()?;
+    let config = Config::new(&config_toml)?;
+    let input = TemplateInput::new(ast, &config)?;
+    let source: String = match input.source {
+        Source::Source(ref s) => s.clone(),
+        Source::Path(_) => get_template_source(&input.path)?,
+    };
+
+    let mut sources = HashMap::new();
+    find_used_templates(&input, &mut sources, source)?;
+
+    let mut parsed = HashMap::new();
+    for (path, src) in &sources {
+        parsed.insert(path, parse(src, input.syntax)?);
+    }
+
+    let mut contexts = HashMap::new();
+    for (path, nodes) in &parsed {
+        contexts.insert(*path, Context::new(input.config, path, nodes)?);
+    }
+
+    let ctx = &contexts[&input.path];
+    let heritage = if !ctx.blocks.is_empty() || ctx.extends.is_some() {
+        Some(Heritage::new(ctx, &contexts))
+    } else {
+        None
+    };
+
+    if input.print == Print::Ast || input.print == Print::All {
+        eprintln!("{:?}", parsed[&input.path]);
+    }
+
+    let code = generator::generate(&input, &contexts, &heritage, INTEGRATIONS)?;
+    if input.print == Print::Code || input.print == Print::All {
+        eprintln!("{}", code);
+    }
+    Ok(code)
+}
+
+fn find_used_templates(
+    input: &TemplateInput<'_>,
+    map: &mut HashMap<PathBuf, String>,
+    source: String,
+) -> Result<(), CompileError> {
+    let mut dependency_graph = Vec::new();
+    let mut check = vec![(input.path.clone(), source)];
+    while let Some((path, source)) = check.pop() {
+        for n in parse(&source, input.syntax)? {
+            match n {
+                Node::Extends(Expr::StrLit(extends)) => {
+                    let extends = input.config.find_template(extends, Some(&path))?;
+                    let dependency_path = (path.clone(), extends.clone());
+                    if dependency_graph.contains(&dependency_path) {
+                        return Err(CompileError::String(format!(
+                            "cyclic dependecy in graph {:#?}",
+                            dependency_graph
+                                .iter()
+                                .map(|e| format!("{:#?} --> {:#?}", e.0, e.1))
+                                .collect::<Vec<String>>()
+                        )));
+                    }
+                    dependency_graph.push(dependency_path);
+                    let source = get_template_source(&extends)?;
+                    check.push((extends, source));
+                }
+                Node::Import(_, import, _) => {
+                    let import = input.config.find_template(import, Some(&path))?;
+                    let source = get_template_source(&import)?;
+                    check.push((import, source));
+                }
+                _ => {}
+            }
+        }
+        map.insert(path, source);
+    }
+    Ok(())
+}
+
+const INTEGRATIONS: Integrations = Integrations {
+    actix: cfg!(feature = "actix-web"),
+    axum: cfg!(feature = "axum"),
+    gotham: cfg!(feature = "gotham"),
+    iron: cfg!(feature = "iron"),
+    mendes: cfg!(feature = "mendes"),
+    rocket: cfg!(feature = "rocket"),
+    tide: cfg!(feature = "tide"),
+    warp: cfg!(feature = "warp"),
+};
-- 
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