[PATCH 1/2] submodule-config: keep shallow recommendation around

[Stefan Beller <sbeller@google.com>]

The shallow field will be used in a later patch by `submodule update`.
To differentiate between the actual depth (which may be different),
we name it `recommend_shallow` as the field in the .gitmodules file
is only a recommendation by the project.

Signed-off-by: Stefan Beller <sbeller@google.com>
---
 submodule-config.c | 10 ++++++++++
 submodule-config.h |  1 +
 2 files changed, 11 insertions(+)

diff --git a/submodule-config.c b/submodule-config.c
index debab29..e11b35d 100644
--- a/submodule-config.c
+++ b/submodule-config.c
@@ -199,6 +199,7 @@ static struct submodule *lookup_or_create_by_name(struct submodule_cache *cache,
 	submodule->update_strategy.command = NULL;
 	submodule->fetch_recurse = RECURSE_SUBMODULES_NONE;
 	submodule->ignore = NULL;
+	submodule->recommend_shallow = -1;
 
 	hashcpy(submodule->gitmodules_sha1, gitmodules_sha1);
 
@@ -353,6 +354,15 @@ static int parse_config(const char *var, const char *value, void *data)
 		else if (parse_submodule_update_strategy(value,
 			 &submodule->update_strategy) < 0)
 				die(_("invalid value for %s"), var);
+	} else if (!strcmp(item.buf, "shallow")) {
+		if (!me->overwrite &&
+			 submodule->recommend_shallow != -1)
+			warn_multiple_config(me->commit_sha1, submodule->name,
+					     "shallow");
+		else {
+			submodule->recommend_shallow =
+				git_config_bool(var, value);
+		}
 	}
 
 	strbuf_release(&name);
diff --git a/submodule-config.h b/submodule-config.h
index e4857f5..b1fdcc0 100644
--- a/submodule-config.h
+++ b/submodule-config.h
@@ -18,6 +18,7 @@ struct submodule {
 	struct submodule_update_strategy update_strategy;
 	/* the sha1 blob id of the responsible .gitmodules file */
 	unsigned char gitmodules_sha1[20];
+	int recommend_shallow;
 };
 
 int parse_fetch_recurse_submodules_arg(const char *opt, const char *arg);
-- 
2.9.0.rc0.2.g145fc64