From f531ea85c12d25a7e23bcd34604d9ca6e2935fb2 Mon Sep 17 00:00:00 2001
From: Fuwn <contact@fuwn.me>
Date: Sun, 3 Jul 2022 19:53:13 -0700
Subject: chore(ninja): emit clang dependency info

---
 build.ninja | 61 ++++++++++++++++++++++++++++++++-----------------------------
 1 file changed, 32 insertions(+), 29 deletions(-)

diff --git a/build.ninja b/build.ninja
index c9efa7e..6ff55a5 100644
--- a/build.ninja
+++ b/build.ninja
@@ -1,14 +1,17 @@
-cc       = clang++
-name     = cait
-src_dir  = $name
-cxxflags = -I$src_dir -O3 -std=c++20 -Weverything -Wno-c++98-compat
-out_dir  = out
-out_ext  = .exe
-obj_ext  = .o
-cc_ext   = .cc
+cc            = clang++
+name          = cait
+src_dir       = $name
+cxx_warnings  = -Weverything -Wno-c++98-compat
+cxx_flags     = -I$src_dir -O3 -std=c++20 $cxx_warnings -MD
+out_dir       = out
+out_ext       = .exe
+obj_ext       = .o
+cc_ext        = .cc
 
 rule cc
-  command = $cc $cxxflags -c $in -o $out
+  command = $cc $cxx_flags -MF $out.d -c $in -o $out
+  depfile = $out.d
+  deps    = gcc
 rule clang_format
   command = clang-format -i -style=LLVM $src_dir/*$cc_ext $src_dir/*.hh
 rule clang_tidy
@@ -16,25 +19,25 @@ rule clang_tidy
 rule link
   command = $cc $in -o $out
 
-build $out_dir/$name$obj_ext:   cc   $src_dir/$name$cc_ext
-build $out_dir/cli$obj_ext:     cc   $src_dir/cli$cc_ext
-build $out_dir/context$obj_ext: cc   $src_dir/context$cc_ext
-build $out_dir/help$obj_ext:    cc   $src_dir/help$cc_ext
-build $out_dir/lexer$obj_ext:   cc   $src_dir/lexer$cc_ext
-build $out_dir/node$obj_ext:    cc   $src_dir/node$cc_ext
-build $out_dir/parser$obj_ext:  cc   $src_dir/parser$cc_ext
-build $out_dir/token$obj_ext:   cc   $src_dir/token$cc_ext
-build $out_dir/$name$out_ext:   link $out_dir/$name$obj_ext   $
-                                     $out_dir/cli$obj_ext     $
-                                     $out_dir/context$obj_ext $
-                                     $out_dir/help$obj_ext    $
-                                     $out_dir/lexer$obj_ext   $
-                                     $out_dir/node$obj_ext    $
-                                     $out_dir/parser$obj_ext  $
-                                     $out_dir/token$obj_ext
-build _format: clang_format
-build format:  phony _format
-build _tidy:   clang_tidy
-build tidy:    phony _tidy
+build $out_dir/$name$obj_ext:   cc    $src_dir/$name$cc_ext
+build $out_dir/cli$obj_ext:     cc    $src_dir/cli$cc_ext
+build $out_dir/context$obj_ext: cc    $src_dir/context$cc_ext
+build $out_dir/help$obj_ext:    cc    $src_dir/help$cc_ext
+build $out_dir/lexer$obj_ext:   cc    $src_dir/lexer$cc_ext
+build $out_dir/node$obj_ext:    cc    $src_dir/node$cc_ext
+build $out_dir/parser$obj_ext:  cc    $src_dir/parser$cc_ext
+build $out_dir/token$obj_ext:   cc    $src_dir/token$cc_ext
+build $out_dir/$name$out_ext:   link  $out_dir/$name$obj_ext   $
+                                      $out_dir/cli$obj_ext     $
+                                      $out_dir/context$obj_ext $
+                                      $out_dir/help$obj_ext    $
+                                      $out_dir/lexer$obj_ext   $
+                                      $out_dir/node$obj_ext    $
+                                      $out_dir/parser$obj_ext  $
+                                      $out_dir/token$obj_ext
+build _format:                  clang_format
+build format:                   phony _format
+build _tidy:                    clang_tidy
+build tidy:                     phony _tidy
 
 default format $out_dir/$name$out_ext
-- 
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