#!/usr/bin/make -f
include /usr/share/dpkg/pkg-info.mk

# Uncomment this to enable verbose mode.
#export DH_VERBOSE = 1

export DH_GOLANG_INSTALL_EXTRA := collector/fixtures

METAPKG := github.com/prometheus/common

BRANCH     := debian/sid
USER       := team+pkg-go@tracker.debian.org
BUILD_DATE := $(shell date --utc --date='@$(SOURCE_DATE_EPOCH)' \
    +%Y%m%d-%H:%M:%S)
GO_VERSION := $(shell go version | sed 's/go version \(\S*\).*/\1/')
BUILDTAGS  :=
BUILDFLAGS  = -tags "$(BUILDTAGS)" -ldflags \
  " -X $(METAPKG)/version.Version=$(DEB_VERSION_UPSTREAM)\
    -X $(METAPKG)/version.Revision=$(DEB_VERSION)\
    -X $(METAPKG)/version.Branch=$(BRANCH)\
    -X $(METAPKG)/version.BuildUser=$(USER)\
    -X $(METAPKG)/version.BuildDate=$(BUILD_DATE)\
    -X $(METAPKG)/version.GoVersion=$(GO_VERSION)"

%:
	dh $@ --builddirectory=_build --buildsystem=golang

# ZFS (or its tests) are not working in 32-bit arches.
include /usr/share/dpkg/architecture.mk
ifeq ($(DEB_HOST_ARCH_BITS),32)
BUILDTAGS += nozfs
endif

BINNAME := $(DEB_SOURCE)

override_dh_auto_build:
	dh_auto_build -- $(BUILDFLAGS)
	# Rename the binary to match the debian package.
	mv -v _build/bin/node_exporter _build/bin/$(BINNAME)

override_dh_auto_test:
	./ttar -C _build/src/github.com/prometheus/node_exporter/collector/fixtures \
      -x -f collector/fixtures/sys.ttar
	./ttar -C _build/src/github.com/prometheus/node_exporter/collector/fixtures \
      -x -f collector/fixtures/udev.ttar
	dh_auto_test -- $(BUILDFLAGS)

MAN_WHATIS := $(BINNAME) \\- Prometheus exporter for machine metrics
MAN_PROG := $(shell echo $(BINNAME) | tr [:lower:] [:upper:])
MAN_DATE := $(shell date --utc --date='@$(SOURCE_DATE_EPOCH)' '+%B %Y')

execute_before_dh_installman:
	_build/bin/$(BINNAME) --help-man > _build/$(BINNAME).1
	# Fix title header and footer.
	sed -i '/^.TH .*/c.TH $(MAN_PROG) "1" "$(MAN_DATE)" "$(DEB_SOURCE) $(DEB_VERSION_UPSTREAM)" "Prometheus"/' \
        _build/$(BINNAME).1
	# Remove build user/build date/go version headers, which is ugly.
	sed -i '/^  /d' _build/$(BINNAME).1
	# Fix whatis entry.
	sed -i '/^.SH "NAME"/,+1c.SH "NAME"\n$(MAN_WHATIS)' _build/$(BINNAME).1
	# Remove default values, as they create unwieldy long lines.
	sed -i 's/\\fB--\(.*\)=".*"\\fR/\\fB--\1\\fR/' _build/$(BINNAME).1

override_dh_auto_install:
	dh_auto_install -- --no-source