build(nix): add a patch to make viz1090 use the packaged mapdata

nix/viz1090.nix

@@ -5,7 +5,9 @@
   fetchFromGitea,
   self,
   system,
-}:
+}: let
+  viz1090-mapdata = self.packages.${system}.viz1090-mapdata;
+in
   stdenv.mkDerivation rec {
     pname = "viz1090";
     version = "0.1.0";
@@ -14,8 +16,8 @@ stdenv.mkDerivation rec {
       domain = "git.vulpecula.zone";
       owner = "tasiaiso";
       repo = pname;
-    rev = "d1f53019b22a9e605506bed90fcffcdc5f7e6186";
+      rev = "1922324b40f84fd449cec3fbfdade8aa33597bf6";
-    hash = "sha256-gtv0u7o+5fqVgA0CHDWdZr0h9A1Nbky1+okHvSv1cVU=";
+      hash = "sha256-bPVFKbGtPXOitzzHb3yJ6XW3fRh8PF/7kfP7EJkJX3c=";
     };
 
     nativeBuildInputs = with pkgs; [
@@ -28,11 +30,13 @@ stdenv.mkDerivation rec {
     ];
 
     buildInputs = [
-    self.packages.${system}.viz1090-mapdata
+      viz1090-mapdata
     ];
 
     buildPhase = ''
-    echo "--- a/Makefile
+      echo "diff --git a/Makefile b/Makefile
+index 5e60779..d5b30ab 100644
+--- a/Makefile
 +++ b/Makefile
 @@ -3,7 +3,7 @@
  # sure that the variable PREFIX is defined, e.g. make PREFIX=/usr/local
@@ -42,17 +46,48 @@ stdenv.mkDerivation rec {
 +CXXFLAGS=-O2 -std=c++11 -g -I ${pkgs.SDL2.dev}/include/SDL2/
  LIBS= -lm -lSDL2 -lSDL2_ttf -lSDL2_gfx -g
  CXX=g++
+ 
+diff --git a/Map.cpp b/Map.cpp
+index cd798ec..c5736bd 100644
+--- a/Map.cpp
++++ b/Map.cpp
+@@ -189,7 +189,7 @@ std::vector<Line*> Map::getLines(float screen_lat_min, float screen_lat_max, flo
+ Map::Map() { 
+   FILE *fileptr;
+ 
+-  if((fileptr = fopen(\"mapdata.bin\", \"rb\"))) {
++  if((fileptr = fopen(\"${viz1090-mapdata}/mapdata.bin\", \"rb\"))) {
+       
+ 
+     fseek(fileptr, 0, SEEK_END);
+@@ -255,7 +255,7 @@ Map::Map() {
+ //
+ 
+ 
+-  if((fileptr = fopen(\"airportdata.bin\", \"rb\"))) {
++  if((fileptr = fopen(\"${viz1090-mapdata}/airportdata.bin\", \"rb\"))) {
+     fseek(fileptr, 0, SEEK_END);
+     airportPoints_count = ftell(fileptr) / sizeof(float);
+     rewind(fileptr);                   
+@@ -350,7 +350,7 @@ Map::Map() {
+ 
+   infile.close();
+ 
+-  infile.open(\"airportnames\");
++  infile.open(\"${viz1090-mapdata}/airportnames\");
+ 
+ 
+   while (std::getline(infile, line))  
+   
    " | git apply -
 
-    make
+      cat Map.cpp | grep mapdata
+
+      make -j $NIX_BUILD_CORES
     '';
 
     installPhase = ''
-    # runHook preInstall
-
       mkdir -p $out/bin
       cp -v viz1090 $out/bin
-
-    # runHook postInstall
     '';
   }