deploy: Don't fail if loading composefs configuration fails due to mi…

src/libostree/ostree-sysroot-deploy.c

@@ -683,8 +683,10 @@ checkout_deployment_tree (OstreeSysroot *sysroot, OstreeRepo *repo, OstreeDeploy
     return glnx_prefix_error (error, "Parsing prepare-root config");
   // We always parse the composefs config, because we want to detect and error
   // out if it's enabled, but not supported at compile time.
+  // However, we don't load the keys here, because they may not exist, such
+  // as in the initial deploy
   g_autoptr (ComposefsConfig) composefs_config
-      = otcore_load_composefs_config (prepare_root_config, error);
+      = otcore_load_composefs_config (prepare_root_config, FALSE, error);
   if (!composefs_config)
     return glnx_prefix_error (error, "Reading composefs config");
 

src/libotcore/otcore-prepare-root.c

@@ -154,7 +154,7 @@ otcore_free_composefs_config (ComposefsConfig *config)
 
 // Parse the [composefs] section of the prepare-root.conf.
 ComposefsConfig *
-otcore_load_composefs_config (GKeyFile *config, GError **error)
+otcore_load_composefs_config (GKeyFile *config, gboolean load_keys, GError **error)
 {
   GLNX_AUTO_PREFIX_ERROR ("Loading composefs config", error);
 
@@ -178,7 +178,7 @@ otcore_load_composefs_config (GKeyFile *config, GError **error)
                                           &ret->signature_pubkey, error))
     return NULL;
 
-  if (ret->is_signed)
+  if (ret->is_signed && load_keys)
     {
       ret->pubkeys = g_ptr_array_new_with_free_func ((GDestroyNotify)g_bytes_unref);
 

src/libotcore/otcore.h

@@ -58,7 +58,8 @@ typedef struct
 void otcore_free_composefs_config (ComposefsConfig *config);
 G_DEFINE_AUTOPTR_CLEANUP_FUNC (ComposefsConfig, otcore_free_composefs_config)
 
-ComposefsConfig *otcore_load_composefs_config (GKeyFile *config, GError **error);
+ComposefsConfig *otcore_load_composefs_config (GKeyFile *config, gboolean load_keys,
+                                               GError **error);
 
 // Our directory with transient state (eventually /run/ostree-booted should be a link to
 // /run/ostree/booted)

src/switchroot/ostree-prepare-root.c

@@ -277,7 +277,8 @@ main (int argc, char *argv[])
 
   // We always parse the composefs config, because we want to detect and error
   // out if it's enabled, but not supported at compile time.
-  g_autoptr (ComposefsConfig) composefs_config = otcore_load_composefs_config (config, &error);
+  g_autoptr (ComposefsConfig) composefs_config
+      = otcore_load_composefs_config (config, TRUE, &error);
   if (!composefs_config)
     errx (EXIT_FAILURE, "%s", error->message);