[gnome-builder] foundry: add fallback LD_LIBRARY_PATH

[Christian Hergert <chergert src gnome org>]

commit a4d9e7e9de7435e999f6cfeebd18ea0bf7d0c082
Author: Christian Hergert <chergert redhat com>
Date:   Tue May 7 14:31:22 2019 -0700

    foundry: add fallback LD_LIBRARY_PATH
    
    We might need to update LD_LIBRARY_PATH for the private
    installation. Ideally, this is managed for us by container
    systems giving us an IdeRunner. But for the basic "private
    directory on host" case, we need to do something.

 src/libide/foundry/ide-runtime.c | 38 +++++++++++++++++++++++++++++++++++---
 1 file changed, 35 insertions(+), 3 deletions(-)
---
diff --git a/src/libide/foundry/ide-runtime.c b/src/libide/foundry/ide-runtime.c
index 27c9d0750..82b59cddc 100644
--- a/src/libide/foundry/ide-runtime.c
+++ b/src/libide/foundry/ide-runtime.c
@@ -29,6 +29,7 @@
 
 #include "ide-build-target.h"
 #include "ide-config.h"
+#include "ide-config-manager.h"
 #include "ide-runtime.h"
 #include "ide-runner.h"
 #include "ide-toolchain.h"
@@ -172,11 +173,15 @@ ide_runtime_real_create_runner (IdeRuntime     *self,
                                 IdeBuildTarget *build_target)
 {
   IdeRuntimePrivate *priv = ide_runtime_get_instance_private (self);
+  IdeEnvironment *env;
   g_autoptr(GFile) installdir = NULL;
   g_auto(GStrv) argv = NULL;
   g_autofree gchar *cwd = NULL;
+  IdeConfigManager *config_manager;
+  const gchar *prefix;
   IdeContext *context;
   IdeRunner *runner;
+  IdeConfig *config;
 
   g_assert (IDE_IS_RUNTIME (self));
   g_assert (!build_target || IDE_IS_BUILD_TARGET (build_target));
@@ -184,11 +189,17 @@ ide_runtime_real_create_runner (IdeRuntime     *self,
   context = ide_object_get_context (IDE_OBJECT (self));
   g_assert (IDE_IS_CONTEXT (context));
 
+  config_manager = ide_config_manager_from_context (context);
+  config = ide_config_manager_get_current (config_manager);
+  prefix = ide_config_get_prefix (config);
+
   runner = ide_runner_new (context);
   g_assert (IDE_IS_RUNNER (runner));
 
   ide_object_append (IDE_OBJECT (self), IDE_OBJECT (runner));
 
+  env = ide_runner_get_environment (runner);
+
   if (ide_str_equal0 (priv->id, "host"))
     ide_runner_set_run_on_host (runner, TRUE);
 
@@ -225,16 +236,37 @@ ide_runtime_real_create_runner (IdeRuntime     *self,
       g_autofree gchar *parentpath = NULL;
 
       /* GSettings requires an env var for non-standard dirs */
-      if (NULL != (parentdir = g_file_get_parent (installdir)))
+      if ((parentdir = g_file_get_parent (installdir)))
         {
-          IdeEnvironment *env = ide_runner_get_environment (runner);
-
           parentpath = g_file_get_path (parentdir);
           schemadir = g_build_filename (parentpath, "share", "glib-2.0", "schemas", NULL);
           ide_environment_setenv (env, "GSETTINGS_SCHEMA_DIR", schemadir);
         }
     }
 
+  if (prefix != NULL)
+    {
+      static const gchar *tries[] = { "lib64", "lib", "lib32", };
+      const gchar *old_path = ide_environment_getenv (env, "LD_LIBRARY_PATH");
+
+      for (guint i = 0; i < G_N_ELEMENTS (tries); i++)
+        {
+          g_autofree gchar *ld_library_path = g_build_filename (prefix, tries[i], NULL);
+
+          if (g_file_test (ld_library_path, G_FILE_TEST_IS_DIR))
+            {
+              if (old_path != NULL)
+                {
+                  g_autofree gchar *freeme = g_steal_pointer (&ld_library_path);
+                  ld_library_path = g_strdup_printf ("%s:%s", ld_library_path, freeme);
+                }
+
+              ide_environment_setenv (env, "LD_LIBRARY_PATH", ld_library_path);
+              break;
+            }
+        }
+    }
+
   if (argv != NULL)
     ide_runner_push_args (runner, (const gchar * const *)argv);