repo-settings: consolidate some config settings

There are a few important config settings that are not loaded
during git_default_config. These are instead loaded on-demand.

Centralize these config options to a single scan, and store
all of the values in a repo_settings struct. The values for
each setting are initialized as negative to indicate "unset".

This centralization will be particularly important in a later
change to introduce "meta" config settings that change the
defaults for these config settings.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/repo-settings.c b/repo-settings.c
new file mode 100644
index 0000000..309577f
--- /dev/null
+++ b/repo-settings.c
@@ -0,0 +1,25 @@
+#include "cache.h"
+#include "config.h"
+#include "repository.h"
+
+void prepare_repo_settings(struct repository *r)
+{
+	int value;
+
+	if (r->settings.initialized)
+		return;
+
+	/* Defaults */
+	memset(&r->settings, -1, sizeof(r->settings));
+
+	if (!repo_config_get_bool(r, "core.commitgraph", &value))
+		r->settings.core_commit_graph = value;
+	if (!repo_config_get_bool(r, "gc.writecommitgraph", &value))
+		r->settings.gc_write_commit_graph = value;
+
+	if (!repo_config_get_bool(r, "index.version", &value))
+		r->settings.index_version = value;
+
+	if (!repo_config_get_bool(r, "pack.usesparse", &value))
+		r->settings.pack_use_sparse = value;
+}