git: --no-lazy-fetch option

Sometimes, especially during tests of low level machinery, it is
handy to have a way to disable lazy fetching of objects.  This
allows us to say, for example, "git cat-file -e <object-name>", to
see if the object is locally available.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

2 files changed, 8 insertions, 0 deletions

diff --git a/Documentation/git.txt b/Documentation/git.txt
index 2535a30194..95f451b22b 100644
--- a/Documentation/git.txt
+++ b/Documentation/git.txt
@@ -177,6 +177,11 @@ If you just want to run git as if it was started in `<path>` then use
 	Do not use replacement refs to replace Git objects. See
 	linkgit:git-replace[1] for more information.
 
+--no-lazy-fetch::
+	Do not fetch missing objects from the promisor remote on
+	demand.  Useful together with `git cat-file -e <object>` to
+	see if the object is locally available.
+
 --literal-pathspecs::
 	Treat pathspecs literally (i.e. no globbing, no pathspec magic).
 	This is equivalent to setting the `GIT_LITERAL_PATHSPECS` environment
diff --git a/git.c b/git.c
index c67e44dd82..28e8bf7497 100644
--- a/git.c
+++ b/git.c
@@ -4,6 +4,7 @@
 #include "exec-cmd.h"
 #include "gettext.h"
 #include "help.h"
+#include "object-file.h"
 #include "pager.h"
 #include "read-cache-ll.h"
 #include "run-command.h"
@@ -186,6 +187,8 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
 			use_pager = 0;
 			if (envchanged)
 				*envchanged = 1;
+		} else if (!strcmp(cmd, "--no-lazy-fetch")) {
+			fetch_if_missing = 0;
 		} else if (!strcmp(cmd, "--no-replace-objects")) {
 			disable_replace_refs();
 			setenv(NO_REPLACE_OBJECTS_ENVIRONMENT, "1", 1);