fix: writers & overlays

legacy/writer/default.nix

@@ -1,41 +1,11 @@
 {
-  lib,
-  writers,
-  gcc,
-}: let
-      writeC = name: argsOrScript:
-        if lib.isAttrs argsOrScript && !lib.isDerivation argsOrScript
-        then
-          writers.makeBinWriter (
-            argsOrScript
-            // {
-              compileScript = ''
-                # Force gcc to treat the input file as C code
-                ${gcc}/bin/gcc -fsyntax-only -xc $contentPath
-                if [ $? -ne 0 ]; then
-                  echo "Syntax check failed"
-                  exit 1
-                fi
-                ${gcc}/bin/gcc -xc -o $out $contentPath
-              '';
-            }
-          )
-          name
-        else
-          writers.makeBinWriter {
-            compileScript = ''
-              # Force gcc to treat the input file as C code
-              ${gcc}/bin/gcc -fsyntax-only -xc $contentPath
-              if [ $? -ne 0 ]; then
-                echo "Syntax check failed"
-                exit 1
-              fi
-              ${gcc}/bin/gcc -xc -o $out $contentPath
-            '';
-          }
-          name
-          argsOrScript;
-      writeMinC = name: includes: body:
+  callPackage
+}: rec {
+  writeShellApplication = callPackage ./writeShellApplication.nix  {};
+  writeC                = callPackage ./writeC.nix                 {};
+  writeCBin             = name: writeC "/bin/${name}";
+  writeMinCBin          = name: includes: body: writeMinC "/bin/${name}" includes body;
+  writeMinC             = name: includes: body:
         writeC name ''
           ${builtins.concatStringsSep "\n" (map (h: "#include " + h) includes)}
 
@@ -43,9 +13,4 @@
               ${body}
           }
         '';
-in {
-  writeCBin = name: writeC "/bin/${name}";
-  writeC = writeC;
-  writeMinCBin = name: includes: body: writeMinC "/bin/${name}" includes body;
-  writeMinC = writeMinC;
 }