curl: fix infinite recursion in staging-next

pkgs/stdenv/darwin/default.nix

@@ -1047,21 +1047,50 @@ in
 
     overrides = self: super: {
       inherit (prevStage) ccWrapperStdenv
-        autoconf automake bash bison cmake cmakeMinimal cpio cyrus_sasl db expat flex groff
-        libedit libtool m4 ninja openldap openssh patchutils pbzx perl pkg-config python3
-        python3Minimal scons serf sqlite subversion sysctl texinfo unzip which
+        autoconf automake bash bison cmake cmakeMinimal cyrus_sasl db expat flex groff
+        libedit libtool m4 ninja openldap openssh patchutils perl pkg-config python3 scons
+        serf sqlite subversion sysctl texinfo unzip which
 
         # CF dependencies - don’t rebuild them.
         icu
 
         # LLVM dependencies - don’t rebuild them.
         libffi libiconv libxml2 ncurses zlib;
 
+      # These overrides are required to break an infinite recursion. curl depends on Darwin
+      # frameworks, but those frameworks require these dependencies to build, which
+      # depend on curl indirectly.
+      cpio = super.cpio.override {
+        inherit (prevStage) fetchurl;
+      };
+
+      libyaml = super.libyaml.override {
+        inherit (prevStage) fetchFromGitHub;
+      };
+
+      pbzx = super.pbzx.override {
+        inherit (prevStage) fetchFromGitHub;
+      };
+
+      python3Minimal = super.python3Minimal.override {
+        inherit (prevStage) fetchurl;
+      };
+
+      xar = super.xar.override {
+        inherit (prevStage) fetchurl;
+      };
+
       darwin = super.darwin.overrideScope (selfDarwin: superDarwin: {
         inherit (prevStage.darwin) dyld CF Libsystem darwin-stubs
           # CF dependencies - don’t rebuild them.
           libobjc objc4;
 
+        # rewrite-tbd is also needed to build Darwin frameworks, so it’s built using the
+        # previous stage’s fetchFromGitHub to avoid an infinite recursion (same as above).
+        rewrite-tbd = superDarwin.rewrite-tbd.override {
+          inherit (prevStage) fetchFromGitHub;
+        };
+
         signingUtils = superDarwin.signingUtils.override {
           inherit (selfDarwin) sigtool;
         };
@@ -1158,9 +1187,10 @@ in
   (prevStage:
     # previous stage4 stdenv:
     assert lib.all isBuiltByNixpkgsCompiler (with prevStage; [
-      bash binutils-unwrapped brotli bzip2 curl diffutils ed file findutils gawk gettext gmp
-      gnugrep gnumake gnused gnutar gzip icu libffi libiconv libidn2 libkrb5 libssh2
-      libunistring libxml2 ncurses nghttp2 openbsm openpam openssl patch pcre xz zlib zstd
+      bash binutils-unwrapped brotli bzip2 cpio curl diffutils ed file findutils gawk
+      gettext gmp gnugrep gnumake gnused gnutar gzip icu libffi libiconv libidn2 libkrb5
+      libssh2 libunistring libxml2 libyaml ncurses nghttp2 openbsm openpam openssl patch
+      pbzx pcre python3Minimal xar xz zlib zstd
     ]);
 
     assert lib.all isBuiltByNixpkgsCompiler (with prevStage.darwin; [
@@ -1176,9 +1206,9 @@ in
     ]);
 
     assert lib.all isBuiltByBootstrapFilesCompiler (with prevStage; [
-      autoconf automake bison cmake cmakeMinimal cpio cyrus_sasl db expat flex groff libedit
-      libtool m4 ninja openldap openssh patchutils pbzx perl pkg-config.pkg-config python3
-      python3Minimal scons serf sqlite subversion sysctl.provider texinfo unzip which
+      autoconf automake bison cmake cmakeMinimal cyrus_sasl db expat flex groff libedit
+      libtool m4 ninja openldap openssh patchutils perl pkg-config.pkg-config python3 scons
+      serf sqlite subversion sysctl.provider texinfo unzip which
     ]);
 
     assert prevStage.darwin.cctools == prevStage.darwin.cctools-llvm;
@@ -1307,14 +1337,14 @@ in
 
       overrides = self: super: {
         inherit (prevStage)
-          bash binutils brotli bzip2 coreutils curl diffutils ed file findutils gawk gettext
-          gmp gnugrep gnumake gnused gnutar gzip icu libffi libiconv libidn2 libssh2
-          libunistring libxml2 ncurses nghttp2 openbsm openpam openssl patch pcre xz zlib
-          zstd;
+          bash binutils brotli bzip2 coreutils cpio curl diffutils ed file findutils gawk
+          gettext gmp gnugrep gnumake gnused gnutar gzip icu libffi libiconv libidn2 libssh2
+          libunistring libxml2 libyaml ncurses nghttp2 openbsm openpam openssl patch pbzx
+          pcre python3Minimal xar xz zlib zstd;
 
         darwin = super.darwin.overrideScope (_: _: {
           inherit (prevStage.darwin)
-            CF ICU Libsystem darwin-stubs dyld locale libobjc libtapi xnu;
+            CF ICU Libsystem darwin-stubs dyld locale libobjc libtapi rewrite-tbd xnu;
         } // lib.optionalAttrs (super.stdenv.targetPlatform == localSystem) {
           inherit (prevStage.darwin) binutils binutils-unwrapped cctools-llvm cctools-port;
         });

pkgs/tools/networking/curl/default.nix

@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, pkg-config, perl, nixosTests
+{ lib, stdenv, fetchurl, darwin, pkg-config, perl, nixosTests
 , brotliSupport ? false, brotli
 , c-aresSupport ? false, c-aresMinimal
 , gnutlsSupport ? false, gnutls
@@ -57,17 +57,18 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-FsYqnErw9wPSi9pte783ukcFWtNBTXDexj4uYzbyqC0=";
   };
 
-  patches = [
-    ./7.79.1-darwin-no-systemconfiguration.patch
-  ];
-
   outputs = [ "bin" "dev" "out" "man" "devdoc" ];
   separateDebugInfo = stdenv.isLinux;
 
   enableParallelBuilding = true;
 
   strictDeps = true;
 
+  buildInputs = lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [
+    CoreFoundation
+    CoreServices
+    SystemConfiguration
+  ]);
   nativeBuildInputs = [ pkg-config perl ];
 
   # Zlib and OpenSSL must be propagated because `libcurl.la' contains

pkgs/top-level/darwin-packages.nix

@@ -13,6 +13,11 @@ let
   # default.
   targetPrefix = lib.optionalString (stdenv.targetPlatform != stdenv.hostPlatform)
                                         (stdenv.targetPlatform.config + "-");
+
+  # Bootstrap `fetchurl` needed to build SDK packages without causing an infinite recursion.
+  fetchurlBoot = import ../build-support/fetchurl/boot.nix {
+    inherit (stdenv) system;
+  };
 in
 
 makeScopeWithSplicing' {
@@ -32,10 +37,13 @@ makeScopeWithSplicing' {
   apple_sdk_10_12 = pkgs.callPackage ../os-specific/darwin/apple-sdk {
     inherit (buildPackages.darwin) print-reexports;
     inherit (self) darwin-stubs;
+    fetchurl = fetchurlBoot;
   };
 
   # macOS 11.0 SDK
-  apple_sdk_11_0 = pkgs.callPackage ../os-specific/darwin/apple-sdk-11.0 { };
+  apple_sdk_11_0 = pkgs.callPackage ../os-specific/darwin/apple-sdk-11.0 {
+    fetchurl = fetchurlBoot;
+  };
 
   # Pick an SDK
   apple_sdk = if stdenv.hostPlatform.isAarch64 then apple_sdk_11_0 else apple_sdk_10_12;