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

# Uncomment this to turn on verbose mode.
#export DH_VERBOSE=1

BUILDDIR := build
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/')
BUILDFLAGS  = -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 $@ --buildsystem=golang --builddirectory=$(BUILDDIR)

BINNAME := $(DEB_SOURCE)
WHATIS := "$(BINNAME) \\- Prometheus exporter for MySQL/MariaDB"

override_dh_auto_build:
	dh_auto_build -- $(BUILDFLAGS)
	# Rename the binary to match the debian package.
	mv -v $(BUILDDIR)/bin/mysqld_exporter $(BUILDDIR)/bin/$(BINNAME)
	$(BUILDDIR)/bin/$(BINNAME) --help-man > $(BUILDDIR)/$(BINNAME).1
	# Remove build user/build date/go version headers, which is ugly.
	sed -i -e '/^  /d' $(BUILDDIR)/$(BINNAME).1
	# Fix whatis entry.
	sed -i '/^.SH "NAME"/,+1c.SH "NAME"\n'$(WHATIS) $(BUILDDIR)/$(BINNAME).1
	# Remove default values as they create unwieldy long lines.
	sed -i 's/\\fB--\(.*\)=".*"\\fR/\\fB--\1\\fR/' $(BUILDDIR)/$(BINNAME).1

override_dh_auto_install:
	dh_install $(BUILDDIR)/bin/$(BINNAME) usr/bin
	dh_installman $(BUILDDIR)/$(BINNAME).1