gr-lora: change variants to subports.

Replace the default gr-lora by gr-lora-rpp0.

Closes: https://trac.macports.org/ticket/55286

science/gr-lora/Portfile

@@ -7,36 +7,35 @@ PortGroup  active_variants 1.1
 PortGroup  cxx11 1.1
 
 name       gr-lora
+version    20180131
+revision   1
 
-variant BastilleResearch conflicts rpp0 description "Install gr-lora from BastilleResearch" {}
-variant rpp0 conflicts BastilleResearch description "Install gr-lora from rpp0" {}
-
-# set default variant if none selected
-if {![variant_isset BastilleResearch] && ![variant_isset rpp0]} {
-    default_variants +rpp0
-}
-
-# make sure -${default_variant} is not set
-if {![variant_isset BastilleResearch] && ![variant_isset rpp0]} {
-    ui_msg "\nError: ${name} requires selection of variant +BastilleResearch or +rpp0.\n"
-    return -code error "Invalid variant."
+if {${subport} eq ${name}} {
+    replaced_by gr-lora-rpp0
+    PortGroup   obsolete 1.0
 }
 
-if {[variant_isset BastilleResearch]} {
+subport gr-lora-BastilleResearch {
 
     github.setup BastilleResearch gr-lora d587169a9676ad0f9ebf85e6a840f3955b3976d7
     version      20170713
     revision     2
     checksums    rmd160 99f82eb4e57eb59c863598b6a5e58f3632edc769 \
                  sha256 e1958cfe15e5ff3542e4df3dc7e626751321957cd2ff0122723d6a86d845cf6c
 
-} elseif {[variant_isset rpp0]} {
+    conflicts gr-lora-rpp0
+
+}
+
+subport gr-lora-rpp0 {
 
     github.setup rpp0 gr-lora 60e94eda37d9e9dcbcfa5b492c3f37e8d2fe06fa
     version      20180131
     checksums    rmd160 d19e3caa76e92920dba65ffc05207210bdab8b41 \
                  sha256 584edfd5cac322eeca2651260a7cfd32ca7bd1fefc8480957b912649edfadb69
 
+    conflicts gr-lora-BastilleResearch
+
     depends_lib-append \
         port:liquid-dsp \
         port:wireshark
@@ -65,23 +64,23 @@ if {[variant_isset BastilleResearch]} {
     }
 }
 
-# allow gr-lora to work with both gnuradio and gnuradio-devel ...
+# allow gr-lora-* to work with both gnuradio and gnuradio-devel ...
 
 depends_lib-append  path:lib/libgnuradio-runtime.dylib:gnuradio
 
 # ... but not with gnuradio-next
 
 pre-fetch {
     if {![catch {set installed [lindex [registry_active gnuradio-next] 0]}]} {
-        # gnuradio-next is installed; this version of gr-lora does not work with gnuradio-next
-        ui_msg "\nError: ${name} requires the gnuradio or gnuradio-devel port, and will not work with the gnuradio-next port.  deactivate gnuradio-next, and then install or activate gnuradio or gnuradio-devel.\n"
+        # gnuradio-next is installed; this version of gr-lora-* does not work with gnuradio-next
+        ui_msg "\nError: ${subport} requires the gnuradio or gnuradio-devel port, and will not work with the gnuradio-next port.  deactivate gnuradio-next, and then install or activate gnuradio or gnuradio-devel.\n"
         return -code error "Invalid port dependency: gnuradio-next"
     }
 }
 
 categories       science comms
 maintainers      {michaelld @michaelld} openmaintainer
-description      Provides augmented functionality (blocks, GRC definitions, apps, etc) for GNU Radio.
+description      Provides an open-source implementation of the LoRa CSS PHY.
 long_description ${description}
 license          GPL-3
 platforms        darwin