Update scraper requirement from 0.20.0 to 0.21.0 (#106)

* Update scraper requirement from 0.20.0 to 0.21.0

Updates the requirements on [scraper](https://github.com/causal-agent/scraper) to permit the latest version.
- [Release notes](https://github.com/causal-agent/scraper/releases)
- [Commits](rust-scraper/scraper@v0.20.0...v0.21.0)

---
updated-dependencies:
- dependency-name: scraper
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

* bump related deps

* fix dependency mess

* fmt

* fix mut

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Markus Unterwaditzer <markus-tarpit+git@unterwaditzer.net>

Cargo.toml

@@ -22,8 +22,9 @@ libtest-mimic = "0.8.1"
 # https://github.com/bheisler/iai/issues/34
 # need to have cache simulation running because of bencher.dev
 iai = { git = "https://github.com/sigaloid/iai", rev = "d56a597" }
+markup5ever_rcdom = "0.5.0-unofficial"
 # required for examples/scraper.rs
-scraper = "0.20.0"
+scraper = "0.21.0"
 argh = "0.1.12"
 
 [features]
@@ -34,13 +35,10 @@ default = ["jetscii"]
 
 # The tree-builder feature contains utilities to use html5ever's DOM and tree
 # builder with html5gum's tokenizer.
-tree-builder = ["html5ever", "markup5ever_rcdom"]
+tree-builder = ["html5ever"]
 
 [dependencies]
-# intentionally held back from 0.29 until scraper updates
-html5ever = { version = "0.27.0", optional = true }
-markup5ever_rcdom = { version = "0.3.0", optional = true }
-
+html5ever = { version = "0.29.0", optional = true }
 jetscii = { version = "0.5.1", optional = true }
 
 [[bench]]

examples/build_tree.rs

@@ -62,10 +62,10 @@ fn main() {
 
     let errors = rcdom.errors;
 
-    if !errors.is_empty() {
+    if !errors.borrow().is_empty() {
         println!("\nParse errors:");
 
-        for err in errors.iter() {
+        for err in errors.borrow().iter() {
             println!("    {}", err);
         }
     }

examples/scraper.rs

@@ -14,8 +14,9 @@
 use std::io::{stdin, Read};
 
 use argh::FromArgs;
+use html5ever::interface::tree_builder::TreeSink;
 use html5gum::emitters::html5ever::parse_document;
-use scraper::{Html, Selector};
+use scraper::{Html, HtmlTreeSink, Selector};
 
 /// Read some HTML from stdin and parse it according to the given selector.
 #[derive(FromArgs)]
@@ -41,8 +42,9 @@ fn main() {
         Html::parse_document(&input)
     } else {
         let dom = Html::new_document();
-        let Ok(dom) = parse_document(&input, dom, Default::default());
-        dom
+        let tree_sink = HtmlTreeSink::new(dom);
+        let Ok(tree_sink) = parse_document(&input, tree_sink, Default::default());
+        tree_sink.finish()
     };
 
     let selector = Selector::parse(&cli.selector).unwrap();

src/emitters/html5ever.rs

@@ -300,24 +300,26 @@ fn map_tokenizer_state(input: Html5everState) -> State {
 /// equivalent to the same functions in [html5ever::driver].
 ///
 /// ```
-/// use html5ever::{local_name, QualName, ns, namespace_url}; // extern crate html5ever;
-/// use scraper::Html; // extern crate scraper;
+/// use html5ever::{local_name, interface::TreeSink, QualName, ns, namespace_url}; // extern crate html5ever;
+/// use scraper::{HtmlTreeSink, Html}; // extern crate scraper;
 ///
 /// let input = "<h1>hello world</h1>";
 ///
 /// // equivalent to `Html::parse_fragment`
 /// let dom = Html::new_fragment();
-/// let Ok(dom) = html5gum::emitters::html5ever::parse_fragment(
+/// let tree_sink = HtmlTreeSink::new(dom);
+/// let Ok(tree_sink) = html5gum::emitters::html5ever::parse_fragment(
 ///     input,
-///     dom,
+///     tree_sink,
 ///     Default::default(),
 ///     QualName::new(None, ns!(html), local_name!("body")),
 ///     Vec::new()
 /// );
+/// let dom: Html = tree_sink.finish();
 /// ```
 pub fn parse_fragment<'a, R, Sink>(
     input: R,
-    mut sink: Sink,
+    sink: Sink,
     opts: ParseOpts,
     context_name: QualName,
     context_attrs: Vec<Attribute>,
@@ -326,7 +328,7 @@ where
     R: Readable<'a>,
     Sink: TreeSink,
 {
-    let context_elem = create_element(&mut sink, context_name, context_attrs);
+    let context_elem = create_element(&sink, context_name, context_attrs);
     parse_fragment_for_element(input, sink, opts, context_elem, None)
 }
 
@@ -363,17 +365,20 @@ where
 /// equivalent to the same functions in [html5ever::driver].
 ///
 /// ```rust
-/// use scraper::Html; // extern crate scraper;
+/// use html5ever::interface::TreeSink; // extern crate html5ever;
+/// use scraper::{HtmlTreeSink, Html}; // extern crate scraper;
 ///
 /// let input = "<h1>hello world</h1>";
 ///
 /// // equivalent to `Html::parse_document`
 /// let dom = Html::new_document();
-/// let Ok(dom) = html5gum::emitters::html5ever::parse_document(
+/// let tree_sink = HtmlTreeSink::new(dom);
+/// let Ok(tree_sink) = html5gum::emitters::html5ever::parse_document(
 ///     input,
-///     dom,
+///     tree_sink,
 ///     Default::default()
 /// );
+/// let dom: Html = tree_sink.finish();
 /// ```
 pub fn parse_document<'a, R, Sink>(
     input: R,

tests/html5lib_tree_builder.rs

@@ -163,7 +163,7 @@ fn build_test(testcase: Testcase, fname: &str, i: usize, scripting: bool) -> Tri
             if let Some(ref frag) = testcase.document_fragment {
                 let frag = frag.trim_end_matches('\n');
                 let context_name = context_name(frag);
-                let context_element = create_element(&mut rcdom, context_name, Vec::new());
+                let context_element = create_element(&rcdom, context_name, Vec::new());
                 tree_builder = TreeBuilder::new_for_fragment(rcdom, context_element, None, opts);
                 initial_state = Some(map_tokenizer_state(
                     tree_builder.tokenizer_state_for_context_elem(),