uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/build-support/dotnet/nuget-to-nix/default.nix

@@ -0,0 +1,27 @@
+{ lib
+, runCommandLocal
+, runtimeShell
+, substituteAll
+, nix
+, coreutils
+, findutils
+, gnused
+}:
+
+runCommandLocal "nuget-to-nix" {
+  script = substituteAll {
+    src = ./nuget-to-nix.sh;
+    inherit runtimeShell;
+
+    binPath = lib.makeBinPath [
+      nix
+      coreutils
+      findutils
+      gnused
+    ];
+  };
+
+  meta.description = "Convert a nuget packages directory to a lockfile for buildDotnetModule";
+} ''
+  install -Dm755 $script $out/bin/nuget-to-nix
+''

pkgs/build-support/dotnet/nuget-to-nix/nuget-to-nix.sh

@@ -0,0 +1,29 @@
+#!@runtimeShell@
+
+set -euo pipefail
+
+export PATH="@binPath@"
+
+if [ $# -eq 0 ]; then
+  >&2 echo "Usage: $0 [packages directory] > deps.nix"
+  exit 1
+fi
+
+pkgs=$1
+tmpfile=$(mktemp /tmp/nuget-to-nix.XXXXXX)
+trap "rm -f ${tmpfile}" EXIT
+
+echo "{ fetchNuGet }: ["
+
+while read pkg_spec; do
+  { read pkg_name; read pkg_version; } < <(
+    # Build version part should be ignored: `3.0.0-beta2.20059.3+77df2220` -> `3.0.0-beta2.20059.3`
+    sed -nE 's/.*<id>([^<]*).*/\1/p; s/.*<version>([^<+]*).*/\1/p' "$pkg_spec")
+  pkg_sha256="$(nix-hash --type sha256 --flat --base32 "$(dirname "$pkg_spec")"/*.nupkg)"
+
+  echo "  (fetchNuGet { pname = \"$pkg_name\"; version = \"$pkg_version\"; sha256 = \"$pkg_sha256\"; })" >> ${tmpfile}
+done < <(find $1 -name '*.nuspec')
+
+LC_ALL=C sort --ignore-case ${tmpfile}
+
+echo "]"