Makefile, podman.spec.rpkg: rm GOBIN and GOPATH

Remove GOPATH setting as since Go 1.9 it defaults to $HOME/go (for
earlier versions it had to be specified explicitly).

Remove GOPATH-related code from the spec, using relative paths when
compiling packages, and enable Go modules, simplifying the spec.

Remove support for multiple paths in GOPATH (which is rarely used and
doesn't really work with modules).

Remove setting GOBIN, rely on $GOPATH/bin instead. In case GOBIN is
explicitly set (which is highly unlikely), forcefully ignore by
unsetting it.

Remove GOBIN from tools invocation since we added GOPATH/bin to PATH.

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

.cirrus.yml

@@ -9,7 +9,6 @@ env:
     DEST_BRANCH: "main"
     # Overrides default location (/tmp/cirrus) for repo clone
     GOPATH: &gopath "/var/tmp/go"
-    GOBIN: "${GOPATH}/bin"
     GOCACHE: "${GOPATH}/cache"
     GOSRC: &gosrc "/var/tmp/go/src/github.com/containers/podman"
     CIRRUS_WORKING_DIR: *gosrc

Makefile

@@ -120,20 +120,10 @@ RELEASE_NUMBER = $(shell echo "$(RELEASE_VERSION)" | sed -e 's/^v\(.*\)/\1/')
 # If non-empty, logs all output from server during remote system testing
 PODMAN_SERVER_LOG ?=
 
-# If GOPATH not specified, use one in the local directory
-ifeq ($(GOPATH),)
-export GOPATH := $(HOME)/go
-unexport GOBIN
-endif
-FIRST_GOPATH := $(firstword $(subst :, ,$(GOPATH)))
-
-GOBIN := $(shell $(GO) env GOBIN)
-ifeq ($(GOBIN),)
-GOBIN := $(FIRST_GOPATH)/bin
-endif
-
+# Ensure GOBIN is not set so the default (`go env GOPATH`/bin) is used.
+override undefine GOBIN
 # This must never include the 'hack' directory
-export PATH := $(PATH):$(GOBIN)
+export PATH := $(shell $(GO) env GOPATH)/bin:$(PATH)
 
 GOMD2MAN ?= $(shell command -v go-md2man || echo './test/tools/build/go-md2man')
 
@@ -522,7 +512,7 @@ run-docker-py-tests:
 .PHONY: localunit
 localunit: test/goecho/goecho test/version/version
 	rm -rf ${COVERAGE_PATH} && mkdir -p ${COVERAGE_PATH}
-	UNIT=1 $(GOBIN)/ginkgo \
+	UNIT=1 ginkgo \
 		-r \
 		$(TESTFLAGS) \
 		--skipPackage test/e2e,pkg/apparmor,pkg/bindings,hack,pkg/machine/e2e \
@@ -541,8 +531,8 @@ test: localunit localintegration remoteintegration localsystem remotesystem  ##
 
 .PHONY: ginkgo-run
 ginkgo-run:
-	ACK_GINKGO_RC=true $(GOBIN)/ginkgo version
-	ACK_GINKGO_RC=true $(GOBIN)/ginkgo -v $(TESTFLAGS) -tags "$(TAGS)" $(GINKGOTIMEOUT) -cover -flakeAttempts 3 -progress -trace -noColor -nodes 3 -debug test/e2e/. $(HACK)
+	ACK_GINKGO_RC=true ginkgo version
+	ACK_GINKGO_RC=true ginkgo -v $(TESTFLAGS) -tags "$(TAGS)" $(GINKGOTIMEOUT) -cover -flakeAttempts 3 -progress -trace -noColor -nodes 3 -debug test/e2e/. $(HACK)
 
 .PHONY: ginkgo
 ginkgo:
@@ -560,7 +550,7 @@ remoteintegration: test-binaries ginkgo-remote
 
 .PHONY: localbenchmarks
 localbenchmarks: test-binaries
-	PATH=$(PATH):$(shell pwd)/hack ACK_GINKGO_RC=true $(GOBIN)/ginkgo \
+	PATH=$(PATH):$(shell pwd)/hack ACK_GINKGO_RC=true ginkgo \
 		      -focus "Podman Benchmark Suite" \
 		      -tags "$(BUILDTAGS) benchmarks" -noColor \
 		      -noisySkippings=false -noisyPendings=false \
@@ -854,13 +844,11 @@ install.tools: .install.ginkgo .install.golangci-lint .install.bats ## Install n
 
 .PHONY: .install.ginkgo
 .install.ginkgo:
-	if [ ! -x "$(GOBIN)/ginkgo" ]; then \
-		$(GO) install $(BUILDFLAGS) ./vendor/github.com/onsi/ginkgo/ginkgo ; \
-	fi
+	$(GO) install $(BUILDFLAGS) ./vendor/github.com/onsi/ginkgo/ginkgo
 
 .PHONY: .install.golangci-lint
 .install.golangci-lint:
-	VERSION=1.45.2 GOBIN=$(GOBIN) ./hack/install_golangci.sh
+	VERSION=1.45.2 ./hack/install_golangci.sh
 
 .PHONY: .install.md2man
 .install.md2man:

podman.spec.rpkg

@@ -13,17 +13,9 @@
 %endif
 
 %if ! 0%{?gobuild:1}
-%define gobuild(o:) GO111MODULE=off go build -buildmode pie -compiler gc -tags="rpm_crashtraceback ${BUILDTAGS:-}" -ldflags "${LDFLAGS:-} -B 0x$(head -c20 /dev/urandom|od -An -tx1|tr -d ' \\n') -extldflags '-Wl,-z,relro -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld '" -a -v -x %{?**};
+%define gobuild(o:) go build -buildmode pie -compiler gc -tags="rpm_crashtraceback ${BUILDTAGS:-}" -ldflags "${LDFLAGS:-} -B 0x$(head -c20 /dev/urandom|od -An -tx1|tr -d ' \\n') -extldflags '-Wl,-z,relro -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld '" -a -v -x %{?**};
 %endif
 
-%global provider github
-%global provider_tld com
-%global project containers
-%global repo %{name}
-# https://github.com/containers/%%{name}
-%global import_path %{provider}.%{provider_tld}/%{project}/%{repo}
-%global git0 https://%{import_path}
-
 # git_dir_name returns repository name derived from remote Git repository URL
 Name:       {{{ git_dir_name }}}
 
@@ -156,8 +148,7 @@ connections as well.
 # This will invoke `make` command in the directory with the extracted sources.
 %build
 %set_build_flags
-export GO111MODULE=off
-export GOPATH=$(pwd)/_build:$(pwd)
+%global gomodulesmode GO111MODULE=on
 export CGO_CFLAGS=$CFLAGS
 # These extra flags present in $CFLAGS have been skipped for now as they break the build
 CGO_CFLAGS=$(echo $CGO_CFLAGS | sed 's/-flto=auto//g')
@@ -168,33 +159,26 @@ CGO_CFLAGS=$(echo $CGO_CFLAGS | sed 's/-specs=\/usr\/lib\/rpm\/redhat\/redhat-an
 export CGO_CFLAGS+=" -m64 -mtune=generic -fcf-protection=full"
 %endif
 
-mkdir _build
-pushd _build
-mkdir -p src/%{provider}.%{provider_tld}/%{project}
-ln -s ../../../../ src/%{import_path}
-popd
-ln -s vendor src
-
 %if 0%{?rhel}
 rm -rf vendor/github.com/containers/storage/drivers/register/register_btrfs.go
 %endif
 
 # build date. FIXME: Makefile uses '/v2/libpod', that doesn't work here?
-LDFLAGS="-X %{import_path}/libpod/define.buildInfo=$(date +%s)"
+LDFLAGS="-X ./libpod/define.buildInfo=$(date +%s)"
 
 # build rootlessport first
-%gobuild -o bin/rootlessport %{import_path}/cmd/rootlessport
+%gobuild -o bin/rootlessport ./cmd/rootlessport
 
 # set base buildtags common to both %%{name} and %%{name}-remote
 export BASEBUILDTAGS="seccomp exclude_graphdriver_devicemapper $(hack/selinux_tag.sh) $(hack/systemd_tag.sh) $(hack/libsubid_tag.sh)"
 
 # build %%{name}
 export BUILDTAGS="$BASEBUILDTAGS $(hack/btrfs_installed_tag.sh) $(hack/btrfs_tag.sh)"
-%gobuild -o bin/%{name} %{import_path}/cmd/%{name}
+%gobuild -o bin/%{name} ./cmd/%{name}
 
 # build %%{name}-remote
 export BUILDTAGS="$BASEBUILDTAGS exclude_graphdriver_btrfs btrfs_noversion remote"
-%gobuild -o bin/%{name}-remote %{import_path}/cmd/%{name}
+%gobuild -o bin/%{name}-remote ./cmd/%{name}
 
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