Prepare for 5.0.0: Update CHANGELOG.md and version

CHANGELOG.md

@@ -1,27 +1,52 @@
 # Changelog
 
-## [Version 4.7.1](https://github.com/trishume/syntect/compare/v4.7.0...v4.7.1) (2022-01-xx)
+## [Version 5.0.0](https://github.com/trishume/syntect/compare/v4.6.0...v5.0.0) (2022-01-xx)
 
-- Remove 'plist-load' feature again due to semver violation. [#403](https://github.com/trishume/syntect/pull/403)
+Breaking changes
 
-This version was removed from crates.io due to the semver violation issue.
-
-## [Version 4.7.0](https://github.com/trishume/syntect/compare/v4.6.0...v4.7.0) (2021-12-25)
-
-- Lazy-load syntaxes to significantly improve startup time
-- Replace lazycell with once_cell to fix crash on lazy initialization
+- Lazy-load syntaxes to significantly improve startup time. This changes the binary format of syntax dump files.
 - Remove `ContextId::new()` from public API to support lazy-loading of syntaxes
+- Rename `HighlightLines::highlight()` to `HighlightLines::highlight_line()` to make it clear that the function takes one line at a time
+- Make `plist` dependency (used for loading themes) optional via new `plist-load` feature
+- Remove obsolete `dump-load-rs` and `dump-create-rs` features that has been identical to `dump-load` and `dump-create` for two years
+- Remove deprecated items `ThemeSettings::highlight_foreground`, `ThemeSettings::selection_background`, `ClassedHTMLGenerator::new`, `ClassedHTMLGenerator::parse_html_for_line`, `html::css_for_theme`, `html::tokens_to_classed_html` and `html::tokens_to_classed_spans`
+- Mark all error enums as `#[non_exhaustive]`
+- These functions have been changed to return a `Result` to allow propagation of errors:
+  - `html::ClassedHTMLGenerator::parse_html_for_line_which_includes_newline`
+  - `html::append_highlighted_html_for_styled_line`
+  - `html::css_for_theme_with_class_style`
+  - `html::highlighted_html_for_string`
+  - `html::line_tokens_to_classed_spans`
+  - `html::styled_line_to_highlighted_html`
+  - `parsing::ParseState::parse_line`
+  - `parsing::ScopeStack::apply`
+  - `parsing::ScopeStack::apply_with_hook`
+  - `parsing::syntax_definition::Context::match_at`
+  - `parsing::syntax_definition::ContextReference::id`
+  - `parsing::syntax_definition::ContextReference::resolve`
+
+Other changes
+
+- Fall back to `Plain Text` if a referenced syntax is missing
+- Add support for `hidden_file_extensions` key in syntaxes.
+- Implement `Error` and `Display` for all error enums by using `thiserror`
+- Replace `lazycell` with `once_cell` to fix crash on lazy initialization
 - Add `ScopeRangeIterator`
-- Add CI check for Minimum Supported Rust Version. This is currently Rust 1.51.
-- Make 'plist' dependency (used for loading themes) optional via new 'plist-load' feature
+- Add CI check for Minimum Supported Rust Version. This is currently Rust 1.53.
 - Make looking up a syntax by extension use case-insensitive comparison
-- Make from_dump_file() ~15% faster
+- Make `from_dump_file()` ~15% faster
 - Blend alpha value on converting colors to ANSI color sequences
 - Fix sample code in documentation to avoid double newlines
 - Fix lots of build warnings and lints
 - Add Criterion benchmarks for a whole syntect pipeline and for `from_dump_file()`
 
-This version was removed from crates.io due to the semver violation issue.
+## [Version 4.7.1](https://github.com/trishume/syntect/compare/v4.7.0...v4.7.1) (2022-01-03)
+
+This version was yanked from crates.io due to a semver violation issue.
+
+## [Version 4.7.0](https://github.com/trishume/syntect/compare/v4.6.0...v4.7.0) (2021-12-25)
+
+This version was yanked from crates.io due to a semver violation issue.
 
 ## [Version 4.6.0](https://github.com/trishume/syntect/compare/v4.5.0...v4.6.0) (2021-08-01)
 

Cargo.toml

@@ -7,7 +7,7 @@ keywords = ["syntax", "highlighting", "highlighter", "colouring", "parsing"]
 categories = ["parser-implementations", "parsing", "text-processing"]
 readme = "Readme.md"
 license = "MIT"
-version = "4.7.1" # remember to update html_root_url
+version = "5.0.0" # remember to update html_root_url
 authors = ["Tristan Hume <tristan@thume.ca>"]
 edition = "2018"
 exclude = [

Readme.md

@@ -23,7 +23,7 @@ I consider this project mostly complete, I still maintain it and review PRs, but
 `syntect` is [available on crates.io](https://crates.io/crates/syntect). You can install it by adding this line to your `Cargo.toml`:
 
 ```toml
-syntect = "4.6"
+syntect = "5.0"
 ```
 
 After that take a look at the [documentation](https://docs.rs/syntect) and the [examples](https://github.com/trishume/syntect/tree/master/examples).

src/lib.rs

@@ -19,7 +19,7 @@
 //! [`parsing`]: parsing/index.html
 //! [`highlighting`]: highlighting/index.html
 
-#![doc(html_root_url = "https://docs.rs/syntect/4.7.1")]
+#![doc(html_root_url = "https://docs.rs/syntect/5.0.0")]
 
 #[macro_use]
 extern crate lazy_static;