[meld] bin/meld: Fix uninstalled use for recent style scheme translation change

[Kai Willadsen <kaiw src gnome org>]

commit c931d532f3f548abc81c3e15e80189525585ea0f
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sat Sep 28 07:49:47 2019 +1000

    bin/meld: Fix uninstalled use for recent style scheme translation change
    
    We've recently moved to `.in` naming for these, which GtkSourceView
    won't find. The easiest fix for uninstalled use is to simply copy them
    sideways to their expected names.

 bin/meld | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/bin/meld b/bin/meld
index 1279dc46..df6ab95d 100755
--- a/bin/meld
+++ b/bin/meld
@@ -281,6 +281,16 @@ def setup_resources():
     style_path = os.path.join(meld.conf.DATADIR, "styles")
     GtkSource.StyleSchemeManager.get_default().append_search_path(style_path)
 
+    # Just copy style schemes to the file ending expected by
+    # GtkSourceView if we're uninstalled and they're missing
+    if uninstalled:
+        for style in {'meld-base', 'meld-dark'}:
+            path = os.path.join(
+                style_path, '{}.style-scheme.xml'.format(style))
+            if not os.path.exists(path):
+                import shutil
+                shutil.copyfile(path + '.in', path)
+
 
 def setup_settings():
     import meld.conf