Ticket #31392: sane-backends.diff

Portfile

@@ -4 +4 @@
 
 name                        sane-backends
 version                     1.0.22
-revision                    1
+revision                    2
 set download_id             3503
 categories                  graphics
 platforms                   darwin
@@ -26 +26 @@
                             rmd160  524713474a819331d0179fa642fef710d073f1d1
 
 depends_lib                 port:jpeg \
-                            port:libusb-compat \
                             port:net-snmp \
                             port:tiff \
                             port:zlib
@@ -38 +37 @@
 
 configure.args              --mandir=${prefix}/share/man \
                             --with-docdir=${prefix}/share/doc/${name} \
-                            --enable-local-backends \
-                            --enable-libusb \
+                            --disable-local-backends \
+                            --disable-libusb \
                             --disable-latex \
                             --without-gphoto2
 
 use_parallel_build          yes
 
+default_variants            +localbackends
+
 pre-destroot {
     xinstall -d -o root -g admin -m 775 ${destroot}${prefix}/var/lock
 }
 
 destroot.keepdirs ${destroot}${prefix}/var/lock
 
-variant disable_localbackends conflicts enable_pnmbackend with_gphoto2 description "turn off compilation of all backends but net" {
-    depends_lib-delete      port:libusb-compat
-    configure.args-delete   --enable-local-backends --enable-libusb
-    configure.args-append   --disable-local-backends --disable-libusb
+variant disable_localbackends conflicts localbackends description { Legacy compatibility variant } {}
+if {[variant_isset disable_localbackends]} {
+    default_variants        -localbackends
+} else {
+    default_variants        +localbackends
+}
+
+variant localbackends conflicts enable_pnmbackend with_gphoto2 description "turn off compilation of all backends but net" {
+    depends_lib-append      port:libusb-compat
+    configure.args-delete   --disable-local-backends --disable-libusb
+    configure.args-append   --enable-local-backends --enable-libusb
 }
 
-variant enable_pnmbackend conflicts disable_localbackends description "enable the pnm backend for testing frontends (possible security risk, see PROBLEMS file)" {
+variant pnm requires localbackends conflicts enable_pnmbackend with_gphoto2 description "enable the pnm backend for testing frontends (possible security risk, see PROBLEMS file)" {
     configure.args-append   --enable-pnm-backend
 }
+variant enable_pnmbackend requires pnm description { Legacy compatibility variant } {}
 
-variant with_gphoto2 conflicts disable_localbackends description "include the gphoto2 backend" {
+variant gphoto2 requires localbackends conflicts enable_pnmbackend with_gphoto2 description "include the gphoto2 backend" {
     depends_lib-append      port:libexif \
                             port:libgphoto2 \
                             port:pkgconfig
     configure.args-delete   --without-gphoto2
     configure.args-append   --with-gphoto2
 }
+variant with_gphoto2 requires gphoto2 description { Legacy compatibility variant } {}
 
 # This project uses u_long *everywhere* and doesn't bother including sys/types.h
 configure.cppflags-append   -include sys/types.h
@@ -79 +89 @@
 notes "\
     Edit ${prefix}/etc/sane.d/dll.conf to enable only\
     specific backends for a noticeable performance gain."
+