Add support for Makefiles

CHANGELOG.md

@@ -5,6 +5,8 @@
 Difftastic will now autodetect files in UTF-16-BE and
 UTF-16-LE. Previously it required files to be UTF-8.
 
+Added support for Makefiles.
+
 ## 0.34 (released 27th August 2022)
 
 ### Build

build.rs

@@ -252,6 +252,11 @@ fn main() {
             src_dir: "vendor/tree-sitter-lua-src",
             extra_files: vec!["scanner.cc"],
         },
+        TreeSitterParser {
+            name: "tree-sitter-make",
+            src_dir: "vendor/tree-sitter-make-src",
+            extra_files: vec![],
+        },
         TreeSitterParser {
             name: "tree-sitter-nix",
             src_dir: "vendor/tree-sitter-nix-src",

manual/src/languages_supported.md

@@ -26,6 +26,7 @@ Difftastic supports the following programming languages.
 | Julia           | [tree-sitter/tree-sitter-julia](https://github.com/tree-sitter/tree-sitter-julia)                                                                              |
 | Kotlin          | [fwcd/tree-sitter-kotlin](https://github.com/fwcd/tree-sitter-kotlin)                                                                                          |
 | Lua             | [nvim-treesitter/tree-sitter-lua](https://github.com/nvim-treesitter/tree-sitter-lua)                                                                          |
+| Make            | [alemuller/tree-sitter-make](https://github.com/alemuller/tree-sitter-make)                                                                                    |
 | Nix             | [cstrahan/tree-sitter-nix](https://github.com/cstrahan/tree-sitter-nix)                                                                                        |
 | OCaml           | [tree-sitter/tree-sitter-ocaml](https://github.com/tree-sitter/tree-sitter-ocaml)                                                                              |
 | Perl            | [ganezdragon/tree-sitter-perl](https://github.com/ganezdragon/tree-sitter-perl)                                                                                |

src/diff/sliders.rs

@@ -68,9 +68,9 @@ fn prefer_outer_delimiter(language: guess_language::Language) -> bool {
         // languages have syntax like `foo(bar)` or `foo[bar]` where
         // the inner delimiter is more relevant.
         Bash | C | CMake | CPlusPlus | CSharp | Css | Dart | Elixir | Elm | Elvish | Gleam | Go
-        | Hack | Haskell | Html | Java | JavaScript | Jsx | Julia | Kotlin | Lua | Nix | OCaml
-        | OCamlInterface | Perl | Php | Python | Ruby | Rust | Scala | Swift | Tsx | TypeScript
-        | Yaml | Zig => false,
+        | Hack | Haskell | Html | Java | JavaScript | Jsx | Julia | Kotlin | Lua | Make | Nix
+        | OCaml | OCamlInterface | Perl | Php | Python | Ruby | Rust | Scala | Swift | Tsx
+        | TypeScript | Yaml | Zig => false,
     }
 }
 

src/parse/guess_language.rs

@@ -45,6 +45,7 @@ pub enum Language {
     Jsx,
     Kotlin,
     Lua,
+    Make,
     Nix,
     OCaml,
     OCamlInterface,
@@ -202,6 +203,9 @@ fn from_name(path: &Path) -> Option<Language> {
             ".arcconfig" | ".auto-changelog" | ".c8rc" | ".htmlhintrc" | ".imgbotconfig"
             | ".nycrc" | ".tern-config" | ".tern-project" | ".watchmanconfig" | "Pipfile.lock"
             | "composer.lock" | "mcmod.info" => Some(Json),
+            "BSDmakefile" | "GNUmakefile" | "Kbuild" | "Makefile" | "Makefile.am"
+            | "Makefile.boot" | "Makefile.frag" | "Makefile.in" | "Makefile.inc"
+            | "Makefile.wat" | "makefile" | "makefile.sco" | "mkfile" => Some(Make),
             "TARGETS" | "BUCK" | "DEPS" => Some(Python),
             "Gemfile" | "Rakefile" => Some(Ruby),
             "Cargo.lock" | "Gopkg.lock" | "Pipfile" | "poetry.lock" => Some(Toml),
@@ -249,6 +253,7 @@ pub fn from_extension(extension: &OsStr) -> Option<Language> {
         "jl" => Some(Julia),
         "kt" | "ktm" | "kts" => Some(Kotlin),
         "lua" => Some(Lua),
+        ".mak" | ".d" | ".make" | ".makefile" | ".mk" | ".mkfile" => Some(Make),
         "nix" => Some(Nix),
         "ml" => Some(OCaml),
         "mli" => Some(OCamlInterface),

src/parse/tree_sitter_parser.rs

@@ -69,6 +69,7 @@ extern "C" {
     fn tree_sitter_julia() -> ts::Language;
     fn tree_sitter_kotlin() -> ts::Language;
     fn tree_sitter_lua() -> ts::Language;
+    fn tree_sitter_make() -> ts::Language;
     fn tree_sitter_nix() -> ts::Language;
     fn tree_sitter_ocaml() -> ts::Language;
     fn tree_sitter_ocaml_interface() -> ts::Language;
@@ -532,6 +533,20 @@ pub fn from_language(language: guess::Language) -> TreeSitterConfig {
                 .unwrap(),
             }
         }
+        Make => {
+            let language = unsafe { tree_sitter_make() };
+            TreeSitterConfig {
+                name: "Makefile",
+                language,
+                atom_nodes: vec![].into_iter().collect(),
+                delimiter_tokens: vec![("(", ")")].into_iter().collect(),
+                highlight_query: ts::Query::new(
+                    language,
+                    include_str!("../../vendor/highlights/make.scm"),
+                )
+                .unwrap(),
+            }
+        }
         Nix => {
             let language = unsafe { tree_sitter_nix() };
             TreeSitterConfig {

vendor/highlights/make.scm

@@ -0,0 +1 @@
+../tree-sitter-make/queries/highlights.scm

vendor/tree-sitter-make-src

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