Build static binary with buildGoModule

Signed-off-by: Wong Hoi Sing Edison <hswong3i@gmail.com>

Makefile

@@ -88,6 +88,7 @@ help:
 	@echo
 	@echo " * 'install' - Install binaries and documents to system locations"
 	@echo " * 'binary' - Build skopeo with a container"
+	@echo " * 'static' - Build statically linked binary"
 	@echo " * 'bin/skopeo' - Build skopeo locally"
 	@echo " * 'test-unit' - Execute unit tests"
 	@echo " * 'test-integration' - Execute integration tests"
@@ -103,12 +104,19 @@ binary: cmd/skopeo
 	${CONTAINER_RUNTIME} run --rm --security-opt label=disable -v $$(pwd):/src/github.com/containers/skopeo \
 		skopeobuildimage make bin/skopeo $(if $(DEBUG),DEBUG=$(DEBUG)) BUILDTAGS='$(BUILDTAGS)'
 
-# Update nix/nixpkgs.json its latest master commit
+# Update nix/nixpkgs.json its latest stable commit
 .PHONY: nixpkgs
 nixpkgs:
 	@nix run -f channel:nixos-20.03 nix-prefetch-git -c nix-prefetch-git \
 		--no-deepClone https://github.com/nixos/nixpkgs > nix/nixpkgs.json
 
+# Build statically linked binary
+.PHONY: static
+static:
+	@nix build -f nix/
+	mkdir -p ./bin
+	cp -rfp ./result/bin/* ./bin/
+
 # Build w/o using containers
 .PHONY: bin/skopeo
 bin/skopeo:

nix/default.nix

@@ -6,6 +6,16 @@ let
         gpgme = (static pkg.gpgme);
         libassuan = (static pkg.libassuan);
         libgpgerror = (static pkg.libgpgerror);
+        libseccomp = (static pkg.libseccomp);
+        glib = (static pkg.glib).overrideAttrs(x: {
+          outputs = [ "bin" "out" "dev" ];
+          mesonFlags = [
+            "-Ddefault_library=static"
+            "-Ddevbindir=${placeholder ''dev''}/bin"
+            "-Dgtk_doc=false"
+            "-Dnls=disabled"
+          ];
+        });
       };
     };
   });
@@ -21,14 +31,15 @@ let
     enableStatic = true;
   });
 
-  self = with pkgs; buildGoPackage rec {
+  self = with pkgs; buildGoModule rec {
     name = "skopeo";
     src = ./..;
-    goPackagePath = "github.com/containers/skopeo";
+    vendorSha256 = null;
     doCheck = false;
     enableParallelBuilding = true;
-    nativeBuildInputs = [ git go-md2man installShellFiles makeWrapper pkg-config ];
-    buildInputs = [ glibc glibc.static gpgme libassuan libgpgerror ];
+    outputs = [ "out" ];
+    nativeBuildInputs = [ bash git go-md2man installShellFiles makeWrapper pkg-config which ];
+    buildInputs = [ glibc glibc.static gpgme libassuan libgpgerror libseccomp ];
     prePatch = ''
       export CFLAGS='-static'
       export LDFLAGS='-s -w -static-libgcc -static'
@@ -36,7 +47,6 @@ let
       export BUILDTAGS='static netgo exclude_graphdriver_btrfs exclude_graphdriver_devicemapper'
     '';
     buildPhase = ''
-      pushd go/src/${goPackagePath}
       patchShebangs .
       make bin/skopeo
     '';

nix/nixpkgs.json

@@ -1,7 +1,7 @@
 {
   "url": "https://github.com/nixos/nixpkgs",
-  "rev": "87c5724af9f61be5e77034229078960690c1abe2",
-  "date": "2020-06-28T22:14:24+01:00",
-  "sha256": "1vg6iajb945b33nx674nnask6wai8zkjd4m0i9fcpdkwhwr0s46s",
+  "rev": "d6a445fe821052861b379d9b6c02d21623c25464",
+  "date": "2020-08-11T04:28:16+01:00",
+  "sha256": "064scwaxg8qg4xbmq07hag57saa4bhsb4pgg5h5vfs4nhhwvchg9",
   "fetchSubmodules": false
 }