nix: introduce sqlite-lib package

this is a helper derivation to speed up go builds, it builds sqlite
shared objects and header files which are then passed into
buildGoModule.

Signed-off-by: oppiliappan <[e-mail]>

flake.lock

···
         "indigo": "indigo",
         "inter-fonts-src": "inter-fonts-src",
         "lucide-src": "lucide-src",
-        "nixpkgs": "nixpkgs"
+        "nixpkgs": "nixpkgs",
+        "sqlite-lib-src": "sqlite-lib-src"
+      }
+    },
+    "sqlite-lib-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1706631843,
+        "narHash": "sha256-bJoMjirsBjm2Qk9KPiy3yV3+8b/POlYe76/FQbciHro=",
+        "type": "tarball",
+        "url": "https://sqlite.org/2024/sqlite-amalgamation-3450100.zip"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://sqlite.org/2024/sqlite-amalgamation-3450100.zip"
       }
     }
   },

flake.nix

···
       url = "https://github.com/IBM/plex/releases/download/%40ibm%2Fplex-mono%401.1.0/ibm-plex-mono.zip";
       flake = false;
     };
+    sqlite-lib-src = {
+      url = "https://sqlite.org/2024/sqlite-amalgamation-3450100.zip";
+      flake = false;
+    };
     gitignore = {
       url = "github:hercules-ci/gitignore.nix";
       inputs.nixpkgs.follows = "nixpkgs";
···
     lucide-src,
     gitignore,
     inter-fonts-src,
+    sqlite-lib-src,
     ibm-plex-mono-src,
   }: let
     supportedSystems = ["x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin"];
···
         };
     in {
       lexgen = final.callPackage ./nix/pkgs/lexgen.nix {inherit indigo;};
+      sqlite-lib = final.pkgsStatic.callPackage ./nix/pkgs/sqlite-lib.nix {
+        inherit (final.pkgsStatic) gcc;
+        inherit sqlite-lib-src;
       };
 
       # appview packages

nix/pkgs/sqlite-lib.nix

···
+{
+  gcc,
+  stdenv,
+  sqlite-lib-src,
+}:
+stdenv.mkDerivation {
+  name = "sqlite-lib";
+  src = sqlite-lib-src;
+  nativeBuildInputs = [gcc];
+  buildPhase = ''
+    gcc -c sqlite3.c
+    ar rcs libsqlite3.a sqlite3.o
+    ranlib libsqlite3.a
+    mkdir -p $out/include $out/lib
+    cp *.h $out/include
+    cp libsqlite3.a $out/lib
+  '';
+}