#
#
#
# Makefile for uploading Google Compute Engine disk images.
#

GCE_UPLOAD_TGTS=	gce-check-depends \
			gce-do-package \
			gce-do-upload
# I do not yet have a better way to deal with the "must be run interactively"
# thing, so this is a fail-safe "do not do anything."
.if !defined(GCE_LOGIN_SKIP) || empty(GCE_LOGIN_SKIP)
GCE_UPLOAD_TGTS=	gce-do-login
.endif
CLEANFILES+=		${GCE_UPLOAD_TGTS}

GCE_BUCKET?=
GCE_LICENSE?=

.if !defined(GCE_FAMILY) || empty(GCE_FAMILY)
GCE_FAMILY=		${TYPE:tl}-${REVISION:S,.,-,}
.endif

.if ${BRANCH} == "STABLE" || ${BRANCH} == "CURRENT" || ${BRANCH} == "PRERELEASE"
SNAPSHOT_DATE=		-v${BUILDDATE}
GCE_FAMILY_SUFX=	-snap
.endif

gce-upload:		${GCE_UPLOAD_TGTS}

gce-check-depends:
.for VAR in _BUCKET
. if !defined(GCE${VAR}) || empty(GCE${VAR})
	@echo "Variable GCE${VAR} cannot be empty."
	@false
. endif
.endfor
.if !exists(/usr/local/bin/gcloud)
. if !exists(${PORTSDIR}/net/google-cloud-sdk/Makefile)
.  if !exists(/usr/local/sbin/pkg-static)
	env ASSUME_ALWAYS_YES=yes pkg bootstrap -yf
.  endif
	env ASSUME_ALWAYS_YES=yes pkg install -y net/google-cloud-sdk \
		lang/python
. else
	env UNAME_r=${UNAME_r} make -C ${PORTSDIR}/net/google-cloud-sdk \
	    BATCH=1 WRKDIRPREFIX=/tmp/ports DISTDIR=/tmp/distfiles \
	    all install clean
	env UNAME_r=${UNAME_r} make -C ${PORTSDIR}/lang/python \
	    BATCH=1 WRKDIRPREFIX=/tmp/ports DISTDIR=/tmp/distfiles \
	    all install clean
. endif
.endif

gce-do-login:
	@echo "This requires human interaction, which is not yet supported."
	@true

.for _FS in ${GCE_FSLIST}
GCE_IMG_${_FS}=		${.OBJDIR}/gce.${_FS}.raw
# Really?  Uppercase characters are not allowed?  Sigh...
# And don't even get me started on the '.'.
GCE_TARGET_${_FS}=	${OSRELEASE:S,.raw,,:tl:S,.,-,g}-${_FS}${SNAPSHOT_DATE}

gce-do-package-${_FS}:
	@# Yes, really...  Sigh.
	cd ${.OBJDIR} && mv ${GCE_IMG_${_FS}} disk.raw
	cd ${.OBJDIR} && tar --format=gnutar -zcf \
		${GCE_TARGET_${_FS}:S,${.OBJDIR}/,,}.tar.gz disk.raw
	cd ${.OBJDIR} && mv disk.raw ${GCE_IMG_${_FS}}
	touch ${.OBJDIR}/${.TARGET}

gce-do-upload-${_FS}:
	@# Fallthrough in case the bucket already exists.
	/usr/local/bin/gsutil mb gs://${GCE_BUCKET} || true
	/usr/local/bin/gsutil cp ${.OBJDIR}/${GCE_TARGET_${_FS}}.tar.gz \
		gs://${GCE_BUCKET}/
	/usr/local/bin/gcloud compute images create ${GCE_TARGET_${_FS}} \
		--family=${GCE_FAMILY}${GCE_FAMILY_SUFX} ${GCE_LICENSE} \
		--guest-os-features=GVNIC,UEFI_COMPATIBLE \
		--source-uri gs://${GCE_BUCKET}/${GCE_TARGET_${_FS}}.tar.gz
	touch ${.OBJDIR}/${.TARGET}
.endfor

gce-do-package: gce-do-package-${VMFS}
gce-do-upload: gce-do-upload-${VMFS}