From 6c5eca2313bd1283466d7010b526068a15bef930 Mon Sep 17 00:00:00 2001
From: Alessandro Astone <ales.astone@gmail.com>
Date: Thu, 28 Sep 2023 14:50:22 +0200
Subject: [PATCH] dnf-repo: Don't download repository if our local cache is up
 to date

Verified by comparing the hash of repomd.xml
---
 libdnf/dnf-repo.cpp | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

diff --git a/libdnf/dnf-repo.cpp b/libdnf/dnf-repo.cpp
index 48434fd9be..16f1b29ee9 100644
--- a/libdnf/dnf-repo.cpp
+++ b/libdnf/dnf-repo.cpp
@@ -969,6 +969,9 @@ dnf_repo_set_keyfile_data(DnfRepo *repo, gboolean reloadFromGKeyFile, GError **e
         dnf_repo_apply_setopts(*conf, repoId);
     }
 
+    if (dnf_context_get_cache_dir(priv->context))
+        conf->basecachedir().set(libdnf::Option::Priority::REPOCONFIG, dnf_context_get_cache_dir(priv->context));
+
     /* baseurl is optional; if missing, unset it */
     g_auto(GStrv) baseurls = NULL;
     auto & repoBaseurls = conf->baseurl().getValue();
@@ -1476,6 +1479,8 @@ dnf_repo_check_internal(DnfRepo *repo,
         return FALSE;
     }
 
+    gboolean too_old = FALSE;
+
     /* check metadata age for non-local repos */
     if (priv->kind != DNF_REPO_KIND_LOCAL && permissible_cache_age != G_MAXUINT) {
         if (!dnf_repo_set_timestamp_modified(repo, error))
@@ -1492,7 +1497,7 @@ dnf_repo_check_internal(DnfRepo *repo,
                         DNF_ERROR_INTERNAL_ERROR,
                         "cache too old: %" G_GINT64_FORMAT" > %i",
                         age_of_data, valid_time_allowed);
-            return FALSE;
+            too_old = TRUE;
         }
     }
 
@@ -1514,10 +1519,10 @@ dnf_repo_check_internal(DnfRepo *repo,
         }
     }
     /* ensure we reset the values from the keyfile */
-    if (!dnf_repo_set_keyfile_data(repo, TRUE, error))
+    if (!too_old && !dnf_repo_set_keyfile_data(repo, TRUE, error))
         return FALSE;
 
-    return TRUE;
+    return !too_old;
 }
 
 /**
@@ -1765,6 +1770,8 @@ dnf_repo_update(DnfRepo *repo,
     if (!dnf_repo_set_keyfile_data(repo, TRUE, error))
         return FALSE;
 
+    auto repoImpl = libdnf::repoGetImpl(priv->repo);
+
     /* countme support */
     libdnf::repoGetImpl(priv->repo)->addCountmeFlag(priv->repo_handle);
 
@@ -1776,6 +1783,15 @@ dnf_repo_update(DnfRepo *repo,
     if (!ret)
         goto out;
 
+    try {
+        if (repoImpl->isInSync()) {
+            /* reset timestamp */
+            utimes(repoImpl->repomdFn.c_str(), NULL);
+            dnf_state_release_locks(state);
+            return TRUE;
+        }
+    } catch (std::exception & ex) {}
+
     /* set state */
     ret = dnf_state_set_steps(state, error,
                               95, /* download */