%global goroot          /usr/lib/golang
%global gopath          %{_datadir}/gocode
%ifarch aarch64
%global gohostarch      arm64
%else
%global gohostarch      amd64
%endif

# rpmbuild magic to keep from having meta dependency on libc.so.6
#%define _use_internal_dependency_generator 0
#%define __find_requires %{nil}

Summary:        Go
Name:           go
Version:        1.10.4
Release:        2%{?dist}
License:        BSD
URL:            https://golang.org
Group:          System Environment/Security
Vendor:         VMware, Inc.
Distribution:   Photon
Source0:        https://dl.google.com/go/%{name}%{version}.src.tar.gz
%define sha1    go=adcd9d0bbbc764fa4ff20c08eb4a5a527fa95d96
Requires:       glibc
%define ExtraBuildRequires go

%description
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

%prep
%setup -qn %{name}

%build
export GOHOSTOS=linux
export GOHOSTARCH=%{gohostarch}
export GOROOT_BOOTSTRAP=%{goroot}

export GOROOT="`pwd`"
export GOPATH=%{gopath}
export GOROOT_FINAL=%{_bindir}/go
rm -f  %{gopath}/src/runtime/*.c
pushd src
./make.bash --no-clean
popd

%install
rm -rf %{buildroot}

mkdir -p %{buildroot}%{_bindir}
mkdir -p %{buildroot}%{goroot}

cp -R api bin doc favicon.ico lib pkg robots.txt src misc VERSION %{buildroot}%{goroot}

# remove the unnecessary zoneinfo file (Go will always use the system one first)
rm -rfv %{buildroot}%{goroot}/lib/time

# remove the doc Makefile
rm -rfv %{buildroot}%{goroot}/doc/Makefile

# put binaries to bindir, linked to the arch we're building,
# leave the arch independent pieces in %{goroot}
mkdir -p %{buildroot}%{goroot}/bin/linux_%{gohostarch}
ln -sfv ../go %{buildroot}%{goroot}/bin/linux_%{gohostarch}/go
ln -sfv ../gofmt %{buildroot}%{goroot}/bin/linux_%{gohostarch}/gofmt
ln -sfv %{goroot}/bin/gofmt %{buildroot}%{_bindir}/gofmt
ln -sfv %{goroot}/bin/go %{buildroot}%{_bindir}/go

# ensure these exist and are owned
mkdir -p %{buildroot}%{gopath}/src/github.com/
mkdir -p %{buildroot}%{gopath}/src/bitbucket.org/
mkdir -p %{buildroot}%{gopath}/src/code.google.com/
mkdir -p %{buildroot}%{gopath}/src/code.google.com/p/

install -vdm755 %{buildroot}/etc/profile.d
cat >> %{buildroot}/etc/profile.d/go-exports.sh <<- "EOF"
export GOROOT=%{goroot}
export GOPATH=%{_datadir}/gocode
export GOHOSTOS=linux
export GOHOSTARCH=%{gohostarch}
export GOOS=linux
EOF
#chown -R root:root %{buildroot}/etc/profile.d/go-exports.sh


#%{_fixperms} %{buildroot}/*

%post -p /sbin/ldconfig

%postun
/sbin/ldconfig
if [ $1 -eq 0 ]; then
  #This is uninstall
  rm /etc/profile.d/go-exports.sh
  rm -rf /opt/%{name}
  exit 0
fi

%clean
rm -rf %{buildroot}/*

%files
%defattr(-,root,root)
%exclude %{goroot}/src/*.rc
%exclude %{goroot}/include/plan9
/etc/profile.d/go-exports.sh
%{goroot}/*
%{gopath}/src
%exclude %{goroot}/src/pkg/debug/dwarf/testdata
%exclude %{goroot}/src/pkg/debug/elf/testdata
%{_bindir}/*

%changelog
*   Mon Oct 29 2018 Alexey Makhalov <amakhalov@vmware.com> 1.10.4-2
-   Use ExtraBuildRequires
*   Mon Sep 24 2018 Tapas Kundu <tkundu@vmware.com> 1.10.4-1
-   Initial build for 1.10.4