setup: suppress implicit "." work-tree for bare repos

diff --git a/cache.h b/cache.h
index 3c6b677418a1db5fd6cd74f1e9cb16b6b8f29ddf..c1fe67ffcfb1e792658d8d2c889e21f28ea78a94 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -365,6 +365,18 @@ static inline enum object_type object_type(unsigned int mode)
 #define GIT_NOTES_REWRITE_REF_ENVIRONMENT "GIT_NOTES_REWRITE_REF"
 #define GIT_NOTES_REWRITE_MODE_ENVIRONMENT "GIT_NOTES_REWRITE_MODE"
 
+/*
+ * This environment variable is expected to contain a boolean indicating
+ * whether we should or should not treat:
+ *
+ *   GIT_DIR=foo.git git ...
+ *
+ * as if GIT_WORK_TREE=. was given. It's not expected that users will make use
+ * of this, but we use it internally to communicate to sub-processes that we
+ * are in a bare repo. If not set, defaults to true.
+ */
+#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT "GIT_IMPLICIT_WORK_TREE"
+
 /*
  * Repository-local GIT_* environment variables; these will be cleared
  * when git spawns a sub-process that runs inside another repository.