[gimp] plug-ins: move conditional gimp_install_procedure() of file-darktable...

[Jehan Pagès <jehanp src gnome org>]

commit 5ee96b174132721a251d8702336257b601accb54
Author: Jehan <jehan girinstud io>
Date:   Tue Jun 27 22:45:31 2017 +0200

    plug-ins: move conditional gimp_install_procedure() of file-darktable...
    
    ... to init().
    Otherwise presence of darktable is not checked at every startup.

 plug-ins/file-darktable/file-darktable.c |   16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)
---
diff --git a/plug-ins/file-darktable/file-darktable.c b/plug-ins/file-darktable/file-darktable.c
index 77dac25..f32d38c 100644
--- a/plug-ins/file-darktable/file-darktable.c
+++ b/plug-ins/file-darktable/file-darktable.c
@@ -42,6 +42,7 @@
 static gchar   *get_executable_path  (const gchar      *suffix,
                                       gboolean         *search_path);
 
+static void     init                 (void);
 static void     query                (void);
 static void     run                  (const gchar      *name,
                                       gint              nparams,
@@ -60,7 +61,7 @@ static gint32   load_thumbnail_image (const gchar      *filename,
 
 const GimpPlugInInfo PLUG_IN_INFO =
 {
-  NULL,  /* init_proc */
+  init,  /* init_proc */
   NULL,  /* quit_proc */
   query, /* query proc */
   run,   /* run_proc */
@@ -126,7 +127,7 @@ get_executable_path (const gchar *suffix,
 }
 
 static void
-query (void)
+init (void)
 {
   static const GimpParamDef load_args[] =
   {
@@ -241,6 +242,17 @@ query (void)
 }
 
 static void
+query (void)
+{
+  /* query() is run only the first time for efficiency. Yet this plugin
+   * is dependent on the presence of darktable which may be installed
+   * or uninstalled between GIMP startups. Therefore we should move the
+   * usual gimp_install_procedure() to init() so that the check is done
+   * at every startup instead.
+   */
+}
+
+static void
 run (const gchar      *name,
      gint              nparams,
      const GimpParam  *param,