HCL: document and add more file extensions

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ### Parsing
 
-Added support for Perl.
+Added support for HCL and Perl.
 
 Improved language detection for JSON. More file extensions and file
 names are recognised as JSON, e.g. `.jsonl`.

manual/src/languages_supported.md

@@ -34,10 +34,11 @@ Difftastic supports the following programming languages.
 
 Difftastic also supports the following structured text formats.
 
-| Language | Parser Used                                                                     |
-|----------|---------------------------------------------------------------------------------|
-| CSS      | [tree-sitter/tree-sitter-css](https://github.com/tree-sitter/tree-sitter-css)   |
-| JSON     | [tree-sitter/tree-sitter-json](https://github.com/tree-sitter/tree-sitter-json) |
-| TOML     | [ikatyang/tree-sitter-toml](https://github.com/ikatyang/tree-sitter-toml)       |
-| YAML     | [ikatyang/tree-sitter-yaml](https://github.com/ikatyang/tree-sitter-yaml)       |
+| Language | Parser Used                                                                       |
+|----------|-----------------------------------------------------------------------------------|
+| CSS      | [tree-sitter/tree-sitter-css](https://github.com/tree-sitter/tree-sitter-css)     |
+| HCL      | [MichaHoffmann/tree-sitter-hcl](https://github.com/MichaHoffmann/tree-sitter-hcl) |
+| JSON     | [tree-sitter/tree-sitter-json](https://github.com/tree-sitter/tree-sitter-json)   |
+| TOML     | [ikatyang/tree-sitter-toml](https://github.com/ikatyang/tree-sitter-toml)         |
+| YAML     | [ikatyang/tree-sitter-yaml](https://github.com/ikatyang/tree-sitter-yaml)         |
 

src/guess_language.rs

@@ -214,7 +214,7 @@ pub fn from_extension(extension: &OsStr) -> Option<Language> {
         "gleam" => Some(Gleam),
         "go" => Some(Go),
         "hs" => Some(Haskell),
-        "hcl" => Some(Hcl),
+        "hcl" | "nomad" | "tf" | "tfvars" | "worfklow" => Some(Hcl),
         "janet" | "jdn" => Some(Janet),
         "java" => Some(Java),
         "cjs" | "js" | "mjs" => Some(JavaScript),