clone: run check_everything_connected

When we fetch from a remote, we do a revision walk to make
sure that what we received is connected to our existing
history. We do not do the same check for clone, which should
be able to check that we received an intact history graph.

The upside of this patch is that it will make clone more
resilient against propagating repository corruption. The
downside is that we will now traverse "rev-list --objects
--all" down to the roots, which may take some time (it is
especially noticeable for a "--local --bare" clone).

Note that we need to adjust t5710, which tries to make such
a bogus clone. Rather than checking after the fact that our
clone is bogus, we can simplify it to just make sure "git
clone" reports failure.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/clone.c b/builtin/clone.c
index 7d48ef3b4e3939053d72d69f138c90248dd949d9..eceaa749223419a276d18fd1621a5e88ff5b4510 100644 (file)
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -23,6 +23,7 @@
 #include "branch.h"
 #include "remote.h"
 #include "run-command.h"
+#include "connected.h"
 
 /*
  * Overall FIXMEs:
@@ -485,12 +486,37 @@ static void write_followtags(const struct ref *refs, const char *msg)
        }
 }
 
+static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
+{
+       struct ref **rm = cb_data;
+       struct ref *ref = *rm;
+
+       /*
+        * Skip anything missing a peer_ref, which we are not
+        * actually going to write a ref for.
+        */
+       while (ref && !ref->peer_ref)
+               ref = ref->next;
+       /* Returning -1 notes "end of list" to the caller. */
+       if (!ref)
+               return -1;
+
+       hashcpy(sha1, ref->old_sha1);
+       *rm = ref->next;
+       return 0;
+}
+
 static void update_remote_refs(const struct ref *refs,
                               const struct ref *mapped_refs,
                               const struct ref *remote_head_points_at,
                               const char *branch_top,
                               const char *msg)
 {
+       const struct ref *rm = mapped_refs;
+
+       if (check_everything_connected(iterate_ref_map, 0, &rm))
+               die(_("remote did not send all necessary objects"));
+
        if (refs) {
                write_remote_refs(mapped_refs);
                if (option_single_branch)

diff --git a/t/t1060-object-corruption.sh b/t/t1060-object-corruption.sh
index 4e7030e61311de6fa8d7e3b4026de0e2009a5dc0..c65a57cd2297ba3150c83f0ee2bf5fa8d3199a6c 100755 (executable)
--- a/t/t1060-object-corruption.sh
+++ b/t/t1060-object-corruption.sh
@@ -79,7 +79,7 @@ test_expect_success 'clone --no-local --bare detects missing object' '
        test_must_fail git clone --no-local --bare missing missing-transport
 '
 
-test_expect_failure 'clone --no-local --bare detects misnamed object' '
+test_expect_success 'clone --no-local --bare detects misnamed object' '
        test_must_fail git clone --no-local --bare misnamed misnamed-transport
 '
 

diff --git a/t/t5710-info-alternate.sh b/t/t5710-info-alternate.sh
index 5a6e49d18d6f9e6e06409093d9b9f426d70de475..8956c21617410863660bff0bc22ec8e81903e81a 100755 (executable)
--- a/t/t5710-info-alternate.sh
+++ b/t/t5710-info-alternate.sh
@@ -58,13 +58,7 @@ test_expect_success 'creating too deep nesting' \
 git clone -l -s D E &&
 git clone -l -s E F &&
 git clone -l -s F G &&
-git clone --bare -l -s G H'
-
-test_expect_success 'invalidity of deepest repository' \
-'cd H && {
-       test_valid_repo
-       test $? -ne 0
-}'
+test_must_fail git clone --bare -l -s G H'
 
 cd "$base_dir"