[PATCH 07/11] repo-settings: status.aheadBehind=false

["Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com>]

From: Derrick Stolee <dstolee@microsoft.com>

When a repo has many active developers, the commit history can grow
very quickly. This can lead remote branches from being very far from
their local copies.

Set stats.aheadBehind=false by default when core.size=large, so all
'git status' calls have an implied '--no-ahead-behind' argument.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
---
 Documentation/config/core.txt   |  3 +++
 Documentation/config/status.txt |  3 ++-
 builtin/commit.c                | 12 ++++++------
 repo-settings.c                 |  6 ++++++
 repo-settings.h                 |  1 +
 5 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/Documentation/config/core.txt b/Documentation/config/core.txt
index df357f5af5..6bed956a08 100644
--- a/Documentation/config/core.txt
+++ b/Documentation/config/core.txt
@@ -620,3 +620,6 @@ core.size::
 * `pack.useSparse=true` uses the sparse tree-walk algorithm, which is
 optimized for enumerating objects during linkgit:git-push[1] from a
 client machine.
++
+* `status.aheadBehind=false` enables `--no-ahead-behind` by default during
+linkgit:git-status[1] calls, saving time in a fast-moving commit history.
diff --git a/Documentation/config/status.txt b/Documentation/config/status.txt
index 0fc704ab80..3e39019810 100644
--- a/Documentation/config/status.txt
+++ b/Documentation/config/status.txt
@@ -15,7 +15,8 @@ status.branch::
 status.aheadBehind::
 	Set to true to enable `--ahead-behind` and false to enable
 	`--no-ahead-behind` by default in linkgit:git-status[1] for
-	non-porcelain status formats.  Defaults to true.
+	non-porcelain status formats.  Defaults to true, unless
+	`core.size=large`.
 
 status.displayCommentPrefix::
 	If set to true, linkgit:git-status[1] will insert a comment
diff --git a/builtin/commit.c b/builtin/commit.c
index 79cb238d87..246a802167 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -36,6 +36,7 @@
 #include "help.h"
 #include "commit-reach.h"
 #include "commit-graph.h"
+#include "repo-settings.h"
 
 static const char * const builtin_commit_usage[] = {
 	N_("git commit [<options>] [--] <pathspec>..."),
@@ -1117,8 +1118,11 @@ static void finalize_deferred_config(struct wt_status *s)
 	 * in particular), we inherit _FULL for backwards compatibility.
 	 */
 	if (use_deferred_config &&
-	    s->ahead_behind_flags == AHEAD_BEHIND_UNSPECIFIED)
-		s->ahead_behind_flags = status_deferred_config.ahead_behind;
+	    s->ahead_behind_flags == AHEAD_BEHIND_UNSPECIFIED) {
+		prepare_repo_settings(the_repository);
+		if (the_repository->settings->status_ahead_behind != -1)
+			s->ahead_behind_flags = the_repository->settings->status_ahead_behind;
+	}
 
 	if (s->ahead_behind_flags == AHEAD_BEHIND_UNSPECIFIED)
 		s->ahead_behind_flags = AHEAD_BEHIND_FULL;
@@ -1259,10 +1263,6 @@ static int git_status_config(const char *k, const char *v, void *cb)
 		status_deferred_config.show_branch = git_config_bool(k, v);
 		return 0;
 	}
-	if (!strcmp(k, "status.aheadbehind")) {
-		status_deferred_config.ahead_behind = git_config_bool(k, v);
-		return 0;
-	}
 	if (!strcmp(k, "status.showstash")) {
 		s->show_stash = git_config_bool(k, v);
 		return 0;
diff --git a/repo-settings.c b/repo-settings.c
index 026ab9c1a0..b3d4b50b72 100644
--- a/repo-settings.c
+++ b/repo-settings.c
@@ -15,6 +15,7 @@ static int git_repo_config(const char *key, const char *value, void *cb)
 			UPDATE_DEFAULT(rs->core_commit_graph, 1);
 			UPDATE_DEFAULT(rs->gc_write_commit_graph, 1);
 			UPDATE_DEFAULT(rs->pack_use_sparse, 1);
+			UPDATE_DEFAULT(rs->status_ahead_behind, 1);
 			UPDATE_DEFAULT(rs->index_version, 4);
 		}
 		return 0;
@@ -31,6 +32,10 @@ static int git_repo_config(const char *key, const char *value, void *cb)
 		rs->pack_use_sparse = git_config_bool(key, value);
 		return 0;
 	}
+	if (!strcmp(key, "status.aheadbehind")) {
+		rs->status_ahead_behind = git_config_bool(key, value);
+		return 0;
+	}
 	if (!strcmp(key, "index.version")) {
 		rs->index_version = git_config_int(key, value);
 		return 0;
@@ -50,6 +55,7 @@ void prepare_repo_settings(struct repository *r)
 	r->settings->core_commit_graph = -1;
 	r->settings->gc_write_commit_graph = -1;
 	r->settings->pack_use_sparse = -1;
+	r->settings->status_ahead_behind = -1;
 	r->settings->index_version = -1;
 
 	repo_config(r, git_repo_config, r->settings);
diff --git a/repo-settings.h b/repo-settings.h
index b50228f992..cc358a083a 100644
--- a/repo-settings.h
+++ b/repo-settings.h
@@ -5,6 +5,7 @@ struct repo_settings {
 	char core_commit_graph;
 	char gc_write_commit_graph;
 	char pack_use_sparse;
+	char status_ahead_behind;
 	int index_version;
 };
 
-- 
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