[gnome-builder] vcs: allow registering known ignored files

[Christian Hergert <chergert src gnome org>]

commit 158028e1ff265a5d2c562d4bf68d3ed3f226b16e
Author: Christian Hergert <chergert redhat com>
Date:   Tue Feb 14 17:11:45 2017 -0800

    vcs: allow registering known ignored files
    
    This is convenience so that plugins such as flatpak can have files ignored
    that shouldn't eventually land in the repositories, nor should be displayed
    in the project tree.

 libide/vcs/ide-vcs.c |   25 +++++++++++++++++++++++++
 libide/vcs/ide-vcs.h |    1 +
 2 files changed, 26 insertions(+), 0 deletions(-)
---
diff --git a/libide/vcs/ide-vcs.c b/libide/vcs/ide-vcs.c
index 1e0cb7d..f63b71d 100644
--- a/libide/vcs/ide-vcs.c
+++ b/libide/vcs/ide-vcs.c
@@ -32,6 +32,16 @@ enum {
 };
 
 static guint signals [N_SIGNALS];
+static GPtrArray *ignored;
+
+void
+ide_vcs_register_ignored (const gchar *pattern)
+{
+  if (ignored == NULL)
+    ignored = g_ptr_array_new ();
+
+  g_ptr_array_add (ignored, g_pattern_spec_new (pattern));
+}
 
 static void
 ide_vcs_default_init (IdeVcsInterface *iface)
@@ -79,6 +89,21 @@ ide_vcs_is_ignored (IdeVcs  *self,
 {
   g_return_val_if_fail (IDE_IS_VCS (self), FALSE);
 
+  if G_LIKELY (ignored != NULL)
+    {
+      g_autofree gchar *name = g_file_get_basename (file);
+      guint len = strlen (name);
+      g_autofree gchar *reversed = g_utf8_strreverse (name, len);
+
+      for (guint i = 0; i < ignored->len; i++)
+        {
+          GPatternSpec *pattern_spec = g_ptr_array_index (ignored, i);
+
+          if (g_pattern_match (pattern_spec, len, name, reversed))
+            return TRUE;
+        }
+    }
+
   if (IDE_VCS_GET_IFACE (self)->is_ignored)
     return IDE_VCS_GET_IFACE (self)->is_ignored (self, file, error);
 
diff --git a/libide/vcs/ide-vcs.h b/libide/vcs/ide-vcs.h
index dd3654b..c9d6f8d 100644
--- a/libide/vcs/ide-vcs.h
+++ b/libide/vcs/ide-vcs.h
@@ -46,6 +46,7 @@ struct _IdeVcsInterface
   gchar                  *(*get_branch_name)           (IdeVcs     *self);
 };
 
+void                    ide_vcs_register_ignored          (const gchar          *pattern);
 IdeBufferChangeMonitor *ide_vcs_get_buffer_change_monitor (IdeVcs               *self,
                                                            IdeBuffer            *buffer);
 GFile                  *ide_vcs_get_working_directory     (IdeVcs               *self);