Add Java support

README.md

@@ -17,6 +17,7 @@ Difftastic supports the following languages:
 * CSS
 * Emacs Lisp
 * Go
+* Java
 * JavaScript (including JSX)
 * JSON
 * OCaml

build.rs

@@ -43,6 +43,11 @@ fn main() {
     );
     build("tree-sitter-elisp", "vendor/tree-sitter-elisp-src", &[]);
     build("tree-sitter-go", "vendor/tree-sitter-go-src", &[]);
+    build(
+        "tree-sitter-java",
+        "vendor/tree-sitter-java-src",
+        &[],
+    );
     build(
         "tree-sitter-javascript",
         "vendor/tree-sitter-javascript-src",

src/tree_sitter_parser.rs

@@ -27,6 +27,7 @@ extern "C" {
     fn tree_sitter_css() -> Language;
     fn tree_sitter_elisp() -> Language;
     fn tree_sitter_go() -> Language;
+    fn tree_sitter_java() -> Language;
     fn tree_sitter_javascript() -> Language;
     fn tree_sitter_json() -> Language;
     fn tree_sitter_ocaml() -> Language;
@@ -65,6 +66,12 @@ pub fn from_extension(extension: &OsStr) -> Option<TreeSitterConfig> {
                 .collect(),
             open_delimiter_tokens: (vec!["{", "[", "("]).into_iter().collect(),
         }),
+        "java" => Some(TreeSitterConfig {
+            name: "Java",
+            language: unsafe { tree_sitter_java() },
+            atom_nodes: (vec![]).into_iter().collect(),
+            open_delimiter_tokens: (vec!["(", "{"]).into_iter().collect(),
+        }),
         "js" | "jsx" => Some(TreeSitterConfig {
             name: "JavaScript",
             language: unsafe { tree_sitter_javascript() },

vendor/tree-sitter-java-src

@@ -0,0 +1 @@
+tree-sitter-java/src