tree-sitter: introduce tree-sitter, add nix grammar

default.nix

@@ -12,6 +12,7 @@
 , nix
 , nixpkgs-fmt
 , pkg-config
+, tree-sitter
 }:
 
 stdenv.mkDerivation {
@@ -41,6 +42,7 @@ stdenv.mkDerivation {
     gtest
     boost182
     llvmPackages.llvm
+    tree-sitter
   ];
 
   env.CXXFLAGS = "-include ${nix.dev}/include/nix/config.h";

meson.build

@@ -31,11 +31,13 @@ gtest_main = dependency('gtest_main')
 
 llvm = dependency('llvm')
 boost = dependency('boost')
+tree_sitter = dependency('tree-sitter')
 
 cpp = meson.get_compiler('cpp')
 backtrace = cpp.find_library('backtrace')
 
 lit = find_program('lit', required: false)
 
 subdir('lspserver')
+subdir('tree-sitter-grammars')
 subdir('nixd')

tree-sitter-grammars/meson.build

@@ -0,0 +1 @@
+subdir('nix')

tree-sitter-grammars/nix/README.md

@@ -0,0 +1,4 @@
+# Tree-sitter-nix
+
+These files are copied from https://github.com/nix-community/tree-sitter-nix,
+and licensed under https://github.com/nix-community/tree-sitter-nix/blob/master/LICENSE

tree-sitter-grammars/nix/meson.build

@@ -0,0 +1,11 @@
+libtree_sitter_nix_deps = [ tree_sitter ]
+
+libtree_sitter_nix = library('tree_sitter_grammars'
+                            , 'parser.c'
+                            , 'scanner.c'
+                            , dependencies: libtree_sitter_nix_deps
+                            , install: true
+                            )
+
+tree_sitter_nix = declare_dependency( link_with: libtree_sitter_nix
+                                    , dependencies: libtree_sitter_nix_deps)