feat(ts)(php): php support for treesitter backend (#56)

lua/aerial/backends/treesitter/language_kind_map.lua

@@ -64,6 +64,14 @@ return {
   markdown = {
     atx_heading = "Interface",
   },
+  php = {
+    anonymous_function_creation_expression = "Function",
+    class_declaration = "Class",
+    function_definition = "Function",
+    interface_declaration = "Interface",
+    method_declaration = "Method",
+    trait_declaration = "Class",
+  },
   python = {
     function_definition = "Function",
     class_definition = "Class",

queries/php/aerial.scm

@@ -0,0 +1,20 @@
+(function_definition
+  name: (name) @name) @type
+
+(expression_statement
+  (assignment_expression
+    left: (variable_name) @name
+    right: (anonymous_function_creation_expression) @type
+  )) @start
+
+(class_declaration
+  name: (name) @name) @type
+
+(method_declaration
+  name: (name) @name) @type
+
+(interface_declaration
+  name: (name) @name) @type
+
+(trait_declaration
+  name: (name) @name) @type

tests/treesitter/php_spec.lua

@@ -0,0 +1,86 @@
+local util = require("tests.test_util")
+
+describe("treesitter php", function()
+  it("parses all symbols correctly", function()
+    util.test_file_symbols("treesitter", "./tests/treesitter/php_test.php", {
+      {
+        kind = "Function",
+        name = "my_function",
+        level = 0,
+        lnum = 2,
+        col = 0,
+        end_lnum = 2,
+        end_col = 27,
+      },
+      {
+        kind = "Function",
+        name = "$var_function",
+        level = 0,
+        lnum = 4,
+        col = 0,
+        end_lnum = 4,
+        end_col = 32,
+      },
+      {
+        kind = "Class",
+        name = "MyClass",
+        level = 0,
+        lnum = 6,
+        col = 0,
+        end_lnum = 8,
+        end_col = 1,
+        children = {
+          {
+            kind = "Method",
+            name = "myMethod",
+            level = 1,
+            lnum = 7,
+            col = 4,
+            end_lnum = 7,
+            end_col = 34,
+          },
+        },
+      },
+      {
+        kind = "Interface",
+        name = "InterfaceOne",
+        level = 0,
+        lnum = 9,
+        col = 0,
+        end_lnum = 11,
+        end_col = 1,
+        children = {
+          {
+            kind = "Method",
+            name = "doSomething",
+            level = 1,
+            lnum = 10,
+            col = 4,
+            end_lnum = 10,
+            end_col = 34,
+          },
+        },
+      },
+      {
+        kind = "Class",
+        name = "MyTrait",
+        level = 0,
+        lnum = 13,
+        col = 0,
+        end_lnum = 15,
+        end_col = 1,
+        children = {
+          {
+            kind = "Method",
+            name = "myTraitMethod",
+            level = 1,
+            lnum = 14,
+            col = 4,
+            end_lnum = 14,
+            end_col = 39,
+          },
+        },
+      },
+    })
+  end)
+end)

tests/treesitter/php_test.php

@@ -0,0 +1,15 @@
+<?php
+function my_function () { }
+
+$var_function = function () { };
+
+class MyClass {
+    public function myMethod() { }
+}
+interface InterfaceOne {
+    public function doSomething();
+}
+
+trait MyTrait {
+    public function myTraitMethod() { }
+}