Add support for go.mod files

This commit adds a grammar for go.mod files using the definition found
at https://golang.org/ref/mod#go-mod-file-grammar.

gomod/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "tree-sitter-gomod"
+description = "gomod grammar for the tree-sitter parsing library"
+version = "0.0.1"
+keywords = ["incremental", "parsing", "gomod"]
+categories = ["parsing", "text-editors"]
+repository = "https://github.com/tree-sitter/tree-sitter-javascript"
+edition = "2018"
+license = "MIT"
+
+build = "bindings/rust/build.rs"
+include = [
+  "bindings/rust/*",
+  "grammar.js",
+  "queries/*",
+  "src/*",
+]
+
+[lib]
+path = "bindings/rust/lib.rs"
+
+[dependencies]
+tree-sitter = "0.17"
+
+[build-dependencies]
+cc = "1.0"

gomod/binding.gyp

@@ -0,0 +1,19 @@
+{
+  "targets": [
+    {
+      "target_name": "tree_sitter_gomod_binding",
+      "include_dirs": [
+        "<!(node -e \"require('nan')\")",
+        "src"
+      ],
+      "sources": [
+        "bindings/node/binding.cc",
+        "src/parser.c",
+        # If your language uses an external scanner, add it here.
+      ],
+      "cflags_c": [
+        "-std=c99",
+      ]
+    }
+  ]
+}

gomod/bindings/node/binding.cc

@@ -0,0 +1,28 @@
+#include "tree_sitter/parser.h"
+#include <node.h>
+#include "nan.h"
+
+using namespace v8;
+
+extern "C" TSLanguage * tree_sitter_gomod();
+
+namespace {
+
+NAN_METHOD(New) {}
+
+void Init(Local<Object> exports, Local<Object> module) {
+  Local<FunctionTemplate> tpl = Nan::New<FunctionTemplate>(New);
+  tpl->SetClassName(Nan::New("Language").ToLocalChecked());
+  tpl->InstanceTemplate()->SetInternalFieldCount(1);
+
+  Local<Function> constructor = Nan::GetFunction(tpl).ToLocalChecked();
+  Local<Object> instance = constructor->NewInstance(Nan::GetCurrentContext()).ToLocalChecked();
+  Nan::SetInternalFieldPointer(instance, 0, tree_sitter_gomod());
+
+  Nan::Set(instance, Nan::New("name").ToLocalChecked(), Nan::New("gomod").ToLocalChecked());
+  Nan::Set(module, Nan::New("exports").ToLocalChecked(), instance);
+}
+
+NODE_MODULE(tree_sitter_gomod_binding, Init)
+
+}  // namespace

gomod/bindings/node/index.js

@@ -0,0 +1,19 @@
+try {
+  module.exports = require("../../build/Release/tree_sitter_gomod_binding");
+} catch (error1) {
+  if (error1.code !== 'MODULE_NOT_FOUND') {
+    throw error1;
+  }
+  try {
+    module.exports = require("../../build/Debug/tree_sitter_gomod_binding");
+  } catch (error2) {
+    if (error2.code !== 'MODULE_NOT_FOUND') {
+      throw error2;
+    }
+    throw error1
+  }
+}
+
+try {
+  module.exports.nodeTypeInfo = require("../../src/node-types.json");
+} catch (_) {}

gomod/bindings/rust/build.rs

@@ -0,0 +1,40 @@
+fn main() {
+    let src_dir = std::path::Path::new("src");
+
+    let mut c_config = cc::Build::new();
+    c_config.include(&src_dir);
+    c_config
+        .flag_if_supported("-Wno-unused-parameter")
+        .flag_if_supported("-Wno-unused-but-set-variable")
+        .flag_if_supported("-Wno-trigraphs");
+    let parser_path = src_dir.join("parser.c");
+    c_config.file(&parser_path);
+
+    // If your language uses an external scanner written in C,
+    // then include this block of code:
+
+    /*
+    let scanner_path = src_dir.join("scanner.c");
+    c_config.file(&scanner_path);
+    println!("cargo:rerun-if-changed={}", scanner_path.to_str().unwrap());
+    */
+
+    c_config.compile("parser");
+    println!("cargo:rerun-if-changed={}", parser_path.to_str().unwrap());
+
+    // If your language uses an external scanner written in C++,
+    // then include this block of code:
+
+    /*
+    let mut cpp_config = cc::Build::new();
+    cpp_config.cpp(true);
+    cpp_config.include(&src_dir);
+    cpp_config
+        .flag_if_supported("-Wno-unused-parameter")
+        .flag_if_supported("-Wno-unused-but-set-variable");
+    let scanner_path = src_dir.join("scanner.cc");
+    cpp_config.file(&scanner_path);
+    cpp_config.compile("scanner");
+    println!("cargo:rerun-if-changed={}", scanner_path.to_str().unwrap());
+    */
+}

gomod/bindings/rust/lib.rs

@@ -0,0 +1,52 @@
+//! This crate provides gomod language support for the [tree-sitter][] parsing library.
+//!
+//! Typically, you will use the [language][language func] function to add this language to a
+//! tree-sitter [Parser][], and then use the parser to parse some code:
+//!
+//! ```
+//! let code = "";
+//! let mut parser = tree_sitter::Parser::new();
+//! parser.set_language(tree_sitter_gomod::language()).expect("Error loading gomod grammar");
+//! let tree = parser.parse(code, None).unwrap();
+//! ```
+//!
+//! [Language]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Language.html
+//! [language func]: fn.language.html
+//! [Parser]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Parser.html
+//! [tree-sitter]: https://tree-sitter.github.io/
+
+use tree_sitter::Language;
+
+extern "C" {
+    fn tree_sitter_gomod() -> Language;
+}
+
+/// Get the tree-sitter [Language][] for this grammar.
+///
+/// [Language]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Language.html
+pub fn language() -> Language {
+    unsafe { tree_sitter_gomod() }
+}
+
+/// The content of the [`node-types.json`][] file for this grammar.
+///
+/// [`node-types.json`]: https://tree-sitter.github.io/tree-sitter/using-parsers#static-node-types
+pub const NODE_TYPES: &'static str = include_str!("../../src/node-types.json");
+
+// Uncomment these to include any queries that this grammar contains
+
+// pub const HIGHLIGHTS_QUERY: &'static str = include_str!("../../queries/highlights.scm");
+// pub const INJECTIONS_QUERY: &'static str = include_str!("../../queries/injections.scm");
+// pub const LOCALS_QUERY: &'static str = include_str!("../../queries/locals.scm");
+// pub const TAGS_QUERY: &'static str = include_str!("../../queries/tags.scm");
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn test_can_load_grammar() {
+        let mut parser = tree_sitter::Parser::new();
+        parser
+            .set_language(super::language())
+            .expect("Error loading gomod language");
+    }
+}

gomod/corpus/exclude.txt

@@ -0,0 +1,36 @@
+==================
+Exclude directive
+==================
+
+exclude golang.org/x/net v1.2.3
+
+---
+
+(source_file
+	(exclude_directive
+		(exclude_spec
+			(module_path)
+			(version))))
+
+==================
+Exclude directive parens
+==================
+
+
+exclude (
+    golang.org/x/crypto v1.4.5
+    golang.org/x/text v1.6.7
+)
+
+
+---
+
+(source_file
+	(exclude_directive
+		(exclude_spec
+			(module_path)
+			(version))
+		(exclude_spec
+			(module_path)
+			(version))))
+

gomod/corpus/go.txt

@@ -0,0 +1,11 @@
+==================
+Go directive comment
+==================
+
+go 1.14
+
+---
+
+(source_file
+	(go_directive
+		(go_version)))

gomod/corpus/module.txt

@@ -0,0 +1,41 @@
+==================
+Module directive no parens
+==================
+
+module golang.org/x/net
+
+---
+
+(source_file
+	(module_directive
+		(module_path)))
+
+==================
+Module directive parens
+==================
+
+module (
+	golang.org/x/net
+)
+
+---
+
+(source_file
+	(module_directive
+		(module_path)))
+
+
+==================
+Module directive comment
+==================
+
+module (
+	golang.org/x/net // inline
+)
+
+---
+
+(source_file
+	(module_directive
+		(module_path)
+		(comment)))

gomod/corpus/replace.txt

@@ -0,0 +1,48 @@
+==================
+Replace directive
+==================
+
+replace golang.org/x/net v1.2.3 => example.com/fork/net v1.4.5
+
+---
+
+(source_file
+	(replace_directive
+		(replace_spec
+			(module_path)
+			(version)
+			(module_path)
+			(version))))
+
+==================
+Exclude directive parens
+==================
+
+
+replace (
+    golang.org/x/net v1.2.3 => example.com/fork/net v1.4.5
+    golang.org/x/net => example.com/fork/net v1.4.5
+    golang.org/x/net v1.2.3 => ./fork/net
+    golang.org/x/net => ./fork/net
+)
+
+---
+
+(source_file
+	(replace_directive
+		(replace_spec
+			(module_path)
+			(version)
+			(module_path)
+			(version))
+		(replace_spec
+			(module_path)
+			(module_path)
+			(version))
+		(replace_spec
+			(module_path)
+			(version)
+			(file_path))
+		(replace_spec
+			(module_path)
+			(file_path))))

gomod/corpus/require.txt

@@ -0,0 +1,49 @@
+==================
+Require directive
+==================
+
+require cloud.google.com/go v0.76.0
+
+---
+
+(source_file
+	(require_directive
+		(require_spec
+			(module_path)
+			(version))))
+
+==================
+Require directive parens
+==================
+
+require (
+		cloud.google.com/go v0.76.0
+)
+
+---
+
+(source_file
+	(require_directive
+		(require_spec
+			(module_path)
+			(version))))
+
+==================
+Require directive parens multiple
+==================
+
+require (
+		cloud.google.com/go v0.76.0
+		cloud.google.com/go v0.76.0
+)
+
+---
+
+(source_file
+	(require_directive
+		(require_spec
+			(module_path)
+			(version))
+		(require_spec
+			(module_path)
+			(version))))