[PATCH 1/3 v3] submodules: make submodule-prefix option an envvar

[Brandon Williams <bmwill@google.com>]

Add a submodule-prefix enviorment variable
'GIT_INTERNAL_SUBMODULE_PREFIX' which can be used by commands which have
--recurse-submodule options.

Signed-off-by: Brandon Williams <bmwill@google.com>
---
 cache.h       | 1 +
 environment.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/cache.h b/cache.h
index 3556326..ae88a35 100644
--- a/cache.h
+++ b/cache.h
@@ -408,6 +408,7 @@ static inline enum object_type object_type(unsigned int mode)
 #define GIT_NAMESPACE_ENVIRONMENT "GIT_NAMESPACE"
 #define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 #define GIT_PREFIX_ENVIRONMENT "GIT_PREFIX"
+#define GIT_SUBMODULE_PREFIX_ENVIRONMENT "GIT_INTERNAL_SUBMODULE_PREFIX"
 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
diff --git a/environment.c b/environment.c
index ca72464..7380815 100644
--- a/environment.c
+++ b/environment.c
@@ -120,6 +120,7 @@ const char * const local_repo_env[] = {
 	NO_REPLACE_OBJECTS_ENVIRONMENT,
 	GIT_REPLACE_REF_BASE_ENVIRONMENT,
 	GIT_PREFIX_ENVIRONMENT,
+	GIT_SUBMODULE_PREFIX_ENVIRONMENT,
 	GIT_SHALLOW_FILE_ENVIRONMENT,
 	GIT_COMMON_DIR_ENVIRONMENT,
 	NULL
-- 
2.8.0.rc3.226.g39d4020