Add nix derivation for static builds

Author: hswong3i

.gitignore

@@ -1,6 +1,7 @@
 *.1
 /layers-*
 /skopeo
+result
 
 # ignore JetBrains IDEs (GoLand) config folder
-.idea
+.idea

Makefile

@@ -62,6 +62,9 @@ CONTAINER_RUN := $(CONTAINER_CMD) "$(IMAGE)"
 
 GIT_COMMIT := $(shell git rev-parse HEAD 2> /dev/null || true)
 
+EXTRA_LDFLAGS ?=
+LDFLAGS := -ldflags '-X main.gitCommit=${GIT_COMMIT} $(EXTRA_LDFLAGS)'
+
 MANPAGES_MD = $(wildcard docs/*.md)
 MANPAGES ?= $(MANPAGES_MD:%.md=%)
 
@@ -85,7 +88,7 @@ help:
 	@echo
 	@echo " * 'install' - Install binaries and documents to system locations"
 	@echo " * 'binary' - Build skopeo with a container"
-	@echo " * 'binary-local' - Build skopeo locally"
+	@echo " * 'bin/skopeo' - Build skopeo locally"
 	@echo " * 'test-unit' - Execute unit tests"
 	@echo " * 'test-integration' - Execute integration tests"
 	@echo " * 'validate' - Verify whether there is no conflict and all Go source files have been formatted, linted and vetted"
@@ -98,19 +101,18 @@ help:
 binary: cmd/skopeo
 	${CONTAINER_RUNTIME} build ${BUILD_ARGS} -f Dockerfile.build -t skopeobuildimage .
 	${CONTAINER_RUNTIME} run --rm --security-opt label=disable -v $$(pwd):/src/github.com/containers/skopeo \
-		skopeobuildimage make binary-local $(if $(DEBUG),DEBUG=$(DEBUG)) BUILDTAGS='$(BUILDTAGS)'
+		skopeobuildimage make bin/skopeo $(if $(DEBUG),DEBUG=$(DEBUG)) BUILDTAGS='$(BUILDTAGS)'
 
-binary-static: cmd/skopeo
-	${CONTAINER_RUNTIME} build ${BUILD_ARGS} -f Dockerfile.build -t skopeobuildimage .
-	${CONTAINER_RUNTIME} run --rm --security-opt label=disable -v $$(pwd):/src/github.com/containers/skopeo \
-		skopeobuildimage make binary-local-static $(if $(DEBUG),DEBUG=$(DEBUG)) BUILDTAGS='$(BUILDTAGS)'
+# Update nix/nixpkgs.json its latest master commit
+.PHONY: nixpkgs
+nixpkgs:
+	@nix run -f channel:nixpkgs-unstable nix-prefetch-git -c nix-prefetch-git \
+		--no-deepClone https://github.com/nixos/nixpkgs > nix/nixpkgs.json
 
 # Build w/o using containers
-binary-local:
-	$(GPGME_ENV) $(GO) build $(MOD_VENDOR) ${GO_DYN_FLAGS} -ldflags "-X main.gitCommit=${GIT_COMMIT}" -gcflags "$(GOGCFLAGS)" -tags "$(BUILDTAGS)" -o skopeo ./cmd/skopeo
-
-binary-local-static:
-	$(GPGME_ENV) $(GO) build $(MOD_VENDOR) -ldflags "-extldflags \"-static\" -X main.gitCommit=${GIT_COMMIT}" -gcflags "$(GOGCFLAGS)" -tags "$(BUILDTAGS)" -o skopeo ./cmd/skopeo
+.PHONY: bin/skopeo
+bin/skopeo:
+	$(GPGME_ENV) $(GO) build $(MOD_VENDOR) ${GO_DYN_FLAGS} ${LDFLAGS} -gcflags "$(GOGCFLAGS)" -tags "$(BUILDTAGS)" -o $@ ./cmd/skopeo
 
 build-container:
 	${CONTAINER_RUNTIME} build ${BUILD_ARGS} -t "$(IMAGE)" .

contrib/skopeoimage/upstream/Dockerfile

@@ -29,7 +29,7 @@ mkdir /root/skopeo; \
 git clone https://github.com/containers/skopeo /root/skopeo/src/github.com/containers/skopeo; \
 export GOPATH=/root/skopeo; \
 cd /root/skopeo/src/github.com/containers/skopeo; \
-make binary-local;\
+make bin/skopeo;\
 make install;\
 rm -rf /root/skopeo/*; \
 yum -y remove git golang go-md2man make; \

hack/make/test-integration

@@ -8,7 +8,7 @@ bundle_test_integration() {
 
 # subshell so that we can export PATH without breaking other things
 (
-	make binary-local ${BUILDTAGS:+BUILDTAGS="$BUILDTAGS"}
+	make bin/skopeo ${BUILDTAGS:+BUILDTAGS="$BUILDTAGS"}
 	make install
 	bundle_test_integration
 ) 2>&1

hack/make/test-system

@@ -11,7 +11,7 @@ sed -i \
     /etc/containers/storage.conf
 
 # Build skopeo, install into /usr/bin
-make binary-local ${BUILDTAGS:+BUILDTAGS="$BUILDTAGS"}
+make bin/skopeo ${BUILDTAGS:+BUILDTAGS="$BUILDTAGS"}
 make install
 
 # Run tests

hack/travis_osx.sh

@@ -12,6 +12,6 @@ go version
 GO111MODULE=off go get -u github.com/cpuguy83/go-md2man golang.org/x/lint/golint
 
 cd ${_containers}/skopeo
-make validate-local test-unit-local binary-local
+make validate-local test-unit-local bin/skopeo
 sudo make install
 skopeo -v

install.md

@@ -114,7 +114,7 @@ Make sure to clone this repository in your `GOPATH` - otherwise compilation fail
 
 ```bash
 $ git clone https://github.com/containers/skopeo $GOPATH/src/github.com/containers/skopeo
-$ cd $GOPATH/src/github.com/containers/skopeo && make binary-local
+$ cd $GOPATH/src/github.com/containers/skopeo && make bin/skopeo
 ```
 
 ### Building in a container

integration/openshift_shell_test.go

@@ -19,7 +19,7 @@ to start a container, then within the container:
 	SKOPEO_CONTAINER_TESTS=1 PS1='nested> ' go test -tags openshift_shell -timeout=24h ./integration -v -check.v -check.vv -check.f='CopySuite.TestRunShell'
 
 An example of what can be done within the container:
-	cd ..; make binary-local install
+	cd ..; make bin/skopeo install
 	./skopeo --tls-verify=false  copy --sign-by=personal@example.com docker://busybox:latest atomic:localhost:5000/myns/personal:personal
 	oc get istag personal:personal -o json
 	curl -L -v 'http://localhost:5000/v2/'

nix/default.nix

@@ -0,0 +1,43 @@
+{ system ? builtins.currentSystem }:
+let
+  pkgs = (import ./nixpkgs.nix {
+    config = {
+      packageOverrides = pkg: {
+        gpgme = (static pkg.gpgme);
+        libassuan = (static pkg.libassuan);
+        libgpgerror = (static pkg.libgpgerror);
+      };
+    };
+  });
+
+  static = pkg: pkg.overrideAttrs(x: {
+    configureFlags = (x.configureFlags or []) ++
+      [ "--without-shared" "--disable-shared" ];
+    dontDisableStatic = true;
+    enableSharedExecutables = false;
+    enableStatic = true;
+  });
+
+  self = with pkgs; buildGoPackage rec {
+    name = "skopeo";
+    src = ./..;
+    goPackagePath = "github.com/containers/skopeo";
+    doCheck = false;
+    enableParallelBuilding = true;
+    nativeBuildInputs = [ git go-md2man installShellFiles makeWrapper pkg-config ];
+    buildInputs = [ glibc glibc.static gpgme libassuan libgpgerror ];
+    prePatch = ''
+      export LDFLAGS='-s -w -static-libgcc -static'
+      export EXTRA_LDFLAGS='-s -w -linkmode external -extldflags "-static -lm"'
+      export BUILDTAGS='static netgo exclude_graphdriver_btrfs exclude_graphdriver_devicemapper'
+    '';
+    buildPhase = ''
+      pushd go/src/${goPackagePath}
+      patchShebangs .
+      make bin/skopeo
+    '';
+    installPhase = ''
+      install -Dm755 bin/skopeo $out/bin/skopeo
+    '';
+  };
+in self

nix/nixpkgs.json

@@ -0,0 +1,10 @@
+{
+  "url": "https://github.com/nixos/nixpkgs",
+  "rev": "78e324d2726127828a15f87a75b4d3199a8955ec",
+  "date": "2020-06-16T18:23:14-07:00",
+  "path": "/nix/store/bwhp0061k3fk00j8fskpfak261jdcjl6-nixpkgs",
+  "sha256": "1j58aa9ngdmvbnds4x4a497nynj390dzqyb5yrvmhjc7k9anq6jm",
+  "fetchSubmodules": false,
+  "deepClone": false,
+  "leaveDotGit": false
+}