make git barf when an alias changes environment variables

diff --git a/cache.h b/cache.h
index 8a9d1f3883150fd40ac1b6c0a44fa896c3133b04..ae1990a54ea9cd0171e4298af42101b374a932a2 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -192,6 +192,7 @@ enum object_type {
 };
 
 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
+#define GIT_WORK_TREE_ENVIRONMENT "GIT_WORK_TREE"
 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
@@ -207,6 +208,7 @@ enum object_type {
 extern int is_bare_repository_cfg;
 extern int is_bare_repository(void);
 extern int is_inside_git_dir(void);
+extern int is_inside_work_tree(void);
 extern const char *get_git_dir(void);
 extern char *get_object_directory(void);
 extern char *get_refs_directory(void);