[shotwell] transformer: Add possibility to define options on commandline

[Jens Georg <jensgeorg src gnome org>]

commit cc0c75f9dfb6df75576d45f67b8ad7624e630899
Author: Jens Georg <mail jensge org>
Date:   Fri Mar 24 20:36:20 2017 +0100

    transformer: Add possibility to define options on commandline
    
    Signed-off-by: Jens Georg <mail jensge org>

 src/graphics-processor.vala |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/src/graphics-processor.vala b/src/graphics-processor.vala
index cb2d9d7..cb73871 100644
--- a/src/graphics-processor.vala
+++ b/src/graphics-processor.vala
@@ -14,7 +14,13 @@ const GLib.OptionEntry[] options = {
 Gee.HashMap<string, KeyValueMap>? marshall_all_transformations(string filename) {
     try {
         var keyfile = new KeyFile();
-        keyfile.load_from_file(filename, KeyFileFlags.NONE);
+        if (filename.has_prefix("string:")) {
+            var data = "[adjustments]\n" + filename.substring(7).replace("&", "\n");
+            keyfile.load_from_data(data, data.length, KeyFileFlags.NONE);
+        } else {
+            keyfile.load_from_file(filename, KeyFileFlags.NONE);
+        }
+
         var map = new Gee.HashMap<string, KeyValueMap>();
 
         var objects = keyfile.get_groups();