Consolidate print backends into one directory

This will let us use GTK_PATH to load them uninstalled, which
is useful for in-tree tests.

modules/printbackends/cloudprint/meson.build

@@ -1,11 +0,0 @@
-shared_module('printbackend-cloudprint',
-              'gtkprintbackendcloudprint.c',
-              'gtkprintercloudprint.c',
-              'gtkcloudprintaccount.c',
-              c_args: [
-                '-DGTK_PRINT_BACKEND_ENABLE_UNSUPPORTED',
-                '-DGTK_DISABLE_DEPRECATION_WARNINGS',
-              ],
-              dependencies: [ libgtk_dep, rest_dep, json_glib_dep ],
-              install_dir: printbackends_install_dir,
-              install : true)

modules/printbackends/cups/meson.build

@@ -1,22 +0,0 @@
-enable_colord = get_option('colord')
-if enable_colord != 'no'
-  want_colord = enable_colord == 'yes'
-  colord_dep = dependency('colord', version: '>= 0.1.9', required: want_colord)
-  cdata.set('HAVE_COLORD', colord_dep.found())
-else
-  colord_dep = []
-endif
-
-shared_module('printbackend-cups',
-              'gtkprintbackendcups.c',
-              'gtkprintercups.c',
-              'gtkcupsutils.c',
-              'gtkcupssecretsutils.c',
-              c_args: [
-                '-DGTK_COMPILATION',
-                '-DGTK_DISABLE_DEPRECATION_WARNINGS',
-                '-DGTK_PRINT_BACKEND_ENABLE_UNSUPPORTED',
-              ],
-              dependencies: [libgtk_dep, libcups, colord_dep],
-              install_dir: printbackends_install_dir,
-              install : true)

modules/printbackends/file/meson.build

@@ -1,10 +0,0 @@
-shared_module('printbackend-file',
-              'gtkprintbackendfile.c',
-              c_args: [
-                '-DGTK_COMPILATION',
-                '-DGTK_DISABLE_DEPRECATION_WARNINGS',
-                '-DGTK_PRINT_BACKEND_ENABLE_UNSUPPORTED',
-              ],
-              dependencies: libgtk_dep,
-              install_dir: printbackends_install_dir,
-              install : true)

modules/printbackends/lpr/meson.build

@@ -1,10 +0,0 @@
-shared_module('printbackend-lpr',
-              'gtkprintbackendlpr.c',
-              c_args: [
-                '-DGTK_COMPILATION',
-                '-DGTK_DISABLE_DEPRECATION_WARNINGS',
-                '-DGTK_PRINT_BACKEND_ENABLE_UNSUPPORTED',
-              ],
-              dependencies: libgtk_dep,
-              install_dir: printbackends_install_dir,
-              install : true)

modules/printbackends/meson.build

@@ -84,6 +84,68 @@ printbackends_install_dir = join_paths(get_option('libdir'), printbackends_subdi
 
 cdata.set_quoted('GTK_PRINT_BACKENDS', ','.join(print_backends))
 
-foreach print_backend : print_backends
-  subdir(print_backend)
-endforeach
+
+enable_colord = get_option('colord')
+if enable_colord != 'no'
+  want_colord = enable_colord == 'yes'
+  colord_dep = dependency('colord', version: '>= 0.1.9', required: want_colord)
+  cdata.set('HAVE_COLORD', colord_dep.found())
+else
+  colord_dep = []
+endif
+
+if print_backends.contains('cups')
+  shared_module('printbackend-cups',
+                'gtkprintbackendcups.c',
+                'gtkprintercups.c',
+                'gtkcupsutils.c',
+                'gtkcupssecretsutils.c',
+                c_args: [
+                  '-DGTK_COMPILATION',
+                  '-DGTK_DISABLE_DEPRECATION_WARNINGS',
+                  '-DGTK_PRINT_BACKEND_ENABLE_UNSUPPORTED',
+                ],
+                dependencies: [libgtk_dep, libcups, colord_dep],
+                install_dir: printbackends_install_dir,
+                install : true)
+endif
+
+if print_backends.contains('cloudprint')
+  shared_module('printbackend-cloudprint',
+                'gtkprintbackendcloudprint.c',
+                'gtkprintercloudprint.c',
+                'gtkcloudprintaccount.c',
+                c_args: [
+                  '-DGTK_PRINT_BACKEND_ENABLE_UNSUPPORTED',
+                 '-DGTK_DISABLE_DEPRECATION_WARNINGS',
+                ],
+                dependencies: [ libgtk_dep, rest_dep, json_glib_dep ],
+                install_dir: printbackends_install_dir,
+                install : true)
+endif
+
+if print_backends.contains('file')
+  shared_module('printbackend-file',
+                'gtkprintbackendfile.c',
+                c_args: [
+                  '-DGTK_COMPILATION',
+                  '-DGTK_DISABLE_DEPRECATION_WARNINGS',
+                  '-DGTK_PRINT_BACKEND_ENABLE_UNSUPPORTED',
+                ],
+                dependencies: libgtk_dep,
+                install_dir: printbackends_install_dir,
+                install : true)
+endif
+
+if print_backends.contains('lpr')
+  shared_module('printbackend-lpr',
+                'gtkprintbackendlpr.c',
+                c_args: [
+                  '-DGTK_COMPILATION',
+                  '-DGTK_DISABLE_DEPRECATION_WARNINGS',
+                  '-DGTK_PRINT_BACKEND_ENABLE_UNSUPPORTED',
+                ],
+                dependencies: libgtk_dep,
+                install_dir: printbackends_install_dir,
+                install : true)
+endif