[gnome-builder] plugins/jhbuild: use IdePathCache to cache path lookups

[Christian Hergert <chergert src gnome org>]

commit 4d29c1d562a138d5808f5559196c79f0f4e9350c
Author: Christian Hergert <chergert redhat com>
Date:   Tue Oct 4 16:50:09 2022 -0700

    plugins/jhbuild: use IdePathCache to cache path lookups
    
    This speeds up the path lookups so that we don't stall the main loop for
    repeated which commands.

 src/plugins/jhbuild/gbp-jhbuild-runtime.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)
---
diff --git a/src/plugins/jhbuild/gbp-jhbuild-runtime.c b/src/plugins/jhbuild/gbp-jhbuild-runtime.c
index 115dac836..d942f20dc 100644
--- a/src/plugins/jhbuild/gbp-jhbuild-runtime.c
+++ b/src/plugins/jhbuild/gbp-jhbuild-runtime.c
@@ -26,9 +26,10 @@
 
 struct _GbpJhbuildRuntime
 {
-  IdeRuntime runtime;
-  char *executable_path;
-  char *install_prefix;
+  IdeRuntime    parent_instance;
+  IdePathCache *path_cache;
+  char         *executable_path;
+  char         *install_prefix;
 };
 
 enum {
@@ -121,11 +122,15 @@ gbp_jhbuild_runtime_contains_program_in_path (IdeRuntime   *runtime,
   g_autoptr(IdeRunContext) run_context = NULL;
   g_autoptr(IdeSubprocess) subprocess = NULL;
   g_autoptr(GError) error = NULL;
+  gboolean found;
 
   g_assert (GBP_IS_JHBUILD_RUNTIME (self));
   g_assert (program != NULL);
   g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
 
+  if (ide_path_cache_contains (self->path_cache, program, &found))
+    return found;
+
   run_context = ide_run_context_new ();
   ide_run_context_push_host (run_context);
   ide_run_context_push (run_context,
@@ -147,7 +152,9 @@ gbp_jhbuild_runtime_contains_program_in_path (IdeRuntime   *runtime,
       return FALSE;
     }
 
-  return ide_subprocess_wait_check (subprocess, cancellable, NULL);
+  found = ide_subprocess_wait_check (subprocess, cancellable, NULL);
+  ide_path_cache_insert (self->path_cache, program, found ? program : NULL);
+  return found;
 }
 
 static void
@@ -172,6 +179,7 @@ gbp_jhbuild_runtime_finalize (GObject *object)
 
   g_clear_pointer (&self->executable_path, g_free);
   g_clear_pointer (&self->install_prefix, g_free);
+  g_clear_object (&self->path_cache);
 
   G_OBJECT_CLASS (gbp_jhbuild_runtime_parent_class)->finalize (object);
 }
@@ -253,5 +261,7 @@ gbp_jhbuild_runtime_class_init (GbpJhbuildRuntimeClass *klass)
 static void
 gbp_jhbuild_runtime_init (GbpJhbuildRuntime *self)
 {
+  self->path_cache = ide_path_cache_new ();
+
   ide_runtime_set_icon_name (IDE_RUNTIME (self), "ui-container-jhbuild-symbolic");
 }