chore(deps): add dmd library

Signed-off-by: Prajwal S N <prajwalnadig21@gmail.com>

.gitmodules

@@ -7,3 +7,6 @@
 [submodule "d-test-utils"]
 	path = d-test-utils
 	url = https://github.com/dlang-community/d-test-utils.git
+[submodule "dmd"]
+	path = dmd
+	url = https://github.com/dlang/dmd.git

README.md

@@ -16,9 +16,9 @@ when using the **--inplace** option.
 
 ### Building from source using Make
 * Clone the repository
-* Run ```git submodule update --init --recursive``` in the dfmt directory
-* To compile with DMD, run ```make``` in the dfmt directory. To compile with
-  LDC, run ```make ldc``` instead. The generated binary will be placed in ```dfmt/bin/```.
+* Run `git submodule update --init --recursive` in the dfmt directory
+* To compile with DMD, run `make` in the dfmt directory. To compile with
+  LDC, run `make ldc` instead. The generated binary will be placed in `dfmt/bin/`.
 
 ### Building from source using dub
 * Clone the repository
@@ -69,8 +69,8 @@ dfmt --inplace --space_after_cast=false --max_line_length=80 \
 ```
 
 ## Disabling formatting
-Formatting can be temporarily disabled by placing the comments ```// dfmt off```
-and ```// dfmt on``` around code that you do not want formatted.
+Formatting can be temporarily disabled by placing the comments `// dfmt off`
+and `// dfmt on` around code that you do not want formatted.
 
 ```d
 void main(string[] args)

dmd

@@ -0,0 +1 @@
+Subproject commit b859107c37a948d0492fccb7a319f0a96b0eecb1

dub.json

@@ -4,7 +4,8 @@
     "targetType": "autodetect",
     "license": "BSL-1.0",
     "dependencies": {
-      "libdparse": ">=0.19.2 <1.0.0"
+      "libdparse": ">=0.19.2 <1.0.0",
+      "dmd": "~>2.105.2"
     },
     "targetPath" : "bin/",
     "targetName" : "dfmt",

makefile

@@ -1,8 +1,36 @@
+DMD_ROOT_SRC := \
+	$(shell find dmd/compiler/src/dmd/common -name "*.d")\
+	$(shell find dmd/compiler/src/dmd/root -name "*.d")
+DMD_LEXER_SRC := \
+	dmd/compiler/src/dmd/console.d \
+	dmd/compiler/src/dmd/entity.d \
+	dmd/compiler/src/dmd/errors.d \
+	dmd/compiler/src/dmd/errorsink.d \
+	dmd/compiler/src/dmd/location.d \
+	dmd/compiler/src/dmd/file_manager.d \
+	dmd/compiler/src/dmd/globals.d \
+	dmd/compiler/src/dmd/id.d \
+	dmd/compiler/src/dmd/identifier.d \
+	dmd/compiler/src/dmd/lexer.d \
+	dmd/compiler/src/dmd/tokens.d \
+	dmd/compiler/src/dmd/utils.d \
+	$(DMD_ROOT_SRC)
+
+DMD_PARSER_SRC := \
+	dmd/compiler/src/dmd/astbase.d \
+	dmd/compiler/src/dmd/parse.d \
+	dmd/compiler/src/dmd/parsetimevisitor.d \
+	dmd/compiler/src/dmd/transitivevisitor.d \
+	dmd/compiler/src/dmd/permissivevisitor.d \
+	dmd/compiler/src/dmd/strictvisitor.d \
+	dmd/compiler/src/dmd/astenums.d \
+	$(DMD_LEXER_SRC)
+
 SRC := $(shell find src -name "*.d") \
-	$(shell find libdparse/src -name "*.d") \
-	$(shell find stdx-allocator/source -name "*.d")
-INCLUDE_PATHS := -Ilibdparse/src -Istdx-allocator/source -Isrc -Jbin
-DMD_COMMON_FLAGS := -dip25 -w $(INCLUDE_PATHS)
+	$(shell find stdx-allocator/source -name "*.d") \
+	$(DMD_PARSER_SRC)
+INCLUDE_PATHS := -Ilibdparse/src -Istdx-allocator/source -Isrc -Idmd/compiler/src -Jbin -Jdmd
+DMD_COMMON_FLAGS := -w $(INCLUDE_PATHS)
 DMD_DEBUG_FLAGS := -debug -g $(DMD_COMMON_FLAGS)
 DMD_FLAGS := -O -inline $(DMD_COMMON_FLAGS)
 DMD_TEST_FLAGS := -unittest -g $(DMD_COMMON_FLAGS)