%global debug_package %{nil}

Name:           smartctl_exporter
Version:        0.14.0
Release:        %autorelease
Summary:        Export smartctl statistics to prometheus

License:        Apache-2.0
URL:            https://github.com/prometheus-community/smartctl_exporter
Source0:        %{url}/archive/refs/tags/v%{version}.tar.gz

BuildRequires:  curl
BuildRequires:  git
BuildRequires:  golang
BuildRequires:  systemd-rpm-macros

%{?systemd_requires}
Requires:       smartmontools >= 7.0

%description
%{summary}.

%prep
%autosetup -n %{name}-%{version}

__SYSTEM_GO_VERSION="$(go version | sed -E 's/^go version go([0-9]+(\.[0-9]+){1,2}).*/\1/')"
__REQUIRED_GO_VERSION="$(awk '$1 == "go" { print $2; exit }' go.mod)"

__REQUIRED_GO_VERSION="$(printf '%s\n' "$__REQUIRED_GO_VERSION" | awk -F. '
  NF == 2 { print $0 ".0" }
  NF == 3 { print $0 }
')"

if [ -z "$__SYSTEM_GO_VERSION" ] || [ -z "$__REQUIRED_GO_VERSION" ]; then
  echo "Unable to determine the Go versions"
  exit 1
fi

if [ "$(printf '%s\n%s\n' "$__SYSTEM_GO_VERSION" "$__REQUIRED_GO_VERSION" | sort -V | tail -n1)" = "$__SYSTEM_GO_VERSION" ]; then
  echo "Skipping Go download. Required ${__REQUIRED_GO_VERSION}, Installed: ${__SYSTEM_GO_VERSION}"
else
  if [ "%{_arch}" = "x86_64" ]; then
    __TOOLCHAIN_ARCH=amd64
  elif [ "%{_arch}" = "aarch64" ]; then
    __TOOLCHAIN_ARCH=arm64
  else
    echo "Unsupported arch: %{_arch}"
    exit 1
  fi

  echo "Downloading Go ${__REQUIRED_GO_VERSION} for ${__TOOLCHAIN_ARCH} ..."
  curl --location --silent "https://go.dev/dl/go${__REQUIRED_GO_VERSION}.linux-${__TOOLCHAIN_ARCH}.tar.gz" \
    | tar --extract --gzip --file=-
fi

%build
if [ -x go/bin/go ]; then
  export PATH="$(pwd)/go/bin:${PATH}"
fi
go version

go build -buildmode=pie -mod=mod -trimpath \
  -ldflags "-X github.com/prometheus/common/version.Version=%{version} \
  -X github.com/prometheus/common/version.Revision=v%{version}-%{release} \
  -X github.com/prometheus/common/version.Branch=%{version}" \
  -o %{name}

%install
install -D --mode=0755 %{name} %{buildroot}%{_bindir}/%{name}
install -D --mode=0644 systemd/%{name}.service %{buildroot}%{_unitdir}/%{name}.service

%files
%license LICENSE
%doc README.md CHANGELOG.md
%{_bindir}/%{name}
%{_unitdir}/%{name}.service

%post
%systemd_post %{name}.service

%preun
%systemd_preun %{name}.service

%postun
%systemd_postun_with_restart %{name}.service

%changelog
%autochangelog