fast-export: deal with tag objects that do not have a tagger
When no tagger was found (old Git produced tags like this),
no "tagger" line is printed (but this is incompatible with the current
git fast-import).
Alternatively, you can pass the option --fake-missing-tagger, forcing
fast-export to fake a tagger
Unspecified Tagger <no-tagger>
with a tag date of the beginning of (Unix) time in the case of a missing
tagger, so that fast-import is still able to import the result.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Documentation/git-fast-export.txt b/Documentation/git-fast-export.txt
index b974e21..539decb 100644
--- a/Documentation/git-fast-export.txt
+++ b/Documentation/git-fast-export.txt
@@ -65,6 +65,12 @@
incremental bidirectional exporting of the repository by keeping the
marks the same across runs.
+--fake-missing-tagger::
+ Some old repositories have tags without a tagger. The
+ fast-import protocol was pretty strict about that, and did not
+ allow that. So fake a tagger to be able to fast-import the
+ output.
+
EXAMPLES
--------
diff --git a/builtin-fast-export.c b/builtin-fast-export.c
index 7d5d57a..8386338 100644
--- a/builtin-fast-export.c
+++ b/builtin-fast-export.c
@@ -24,6 +24,7 @@
static int progress;
static enum { VERBATIM, WARN, STRIP, ABORT } signed_tag_mode = ABORT;
+static int fake_missing_tagger;
static int parse_opt_signed_tag_mode(const struct option *opt,
const char *arg, int unset)
@@ -297,10 +298,17 @@
message_size = strlen(message);
}
tagger = memmem(buf, message ? message - buf : size, "\ntagger ", 8);
- if (!tagger)
- die ("No tagger for tag %s", sha1_to_hex(tag->object.sha1));
- tagger++;
- tagger_end = strchrnul(tagger, '\n');
+ if (!tagger) {
+ if (fake_missing_tagger)
+ tagger = "tagger Unspecified Tagger "
+ "<unspecified-tagger> 0 +0000";
+ else
+ tagger = "";
+ tagger_end = tagger + strlen(tagger);
+ } else {
+ tagger++;
+ tagger_end = strchrnul(tagger, '\n');
+ }
/* handle signed tags */
if (message) {
@@ -326,9 +334,10 @@
if (!prefixcmp(name, "refs/tags/"))
name += 10;
- printf("tag %s\nfrom :%d\n%.*s\ndata %d\n%.*s\n",
+ printf("tag %s\nfrom :%d\n%.*s%sdata %d\n%.*s\n",
name, get_object_mark(tag->tagged),
(int)(tagger_end - tagger), tagger,
+ tagger == tagger_end ? "" : "\n",
(int)message_size, (int)message_size, message ? message : "");
}
@@ -483,6 +492,8 @@
"Dump marks to this file"),
OPT_STRING(0, "import-marks", &import_filename, "FILE",
"Import marks from this file"),
+ OPT_BOOLEAN(0, "fake-missing-tagger", &fake_missing_tagger,
+ "Fake a tagger when tags lack one"),
OPT_END()
};
diff --git a/t/t9301-fast-export.sh b/t/t9301-fast-export.sh
index 638c858..3a6509a1 100755
--- a/t/t9301-fast-export.sh
+++ b/t/t9301-fast-export.sh
@@ -239,4 +239,24 @@
'
+cat > tag-content << EOF
+object $(git rev-parse HEAD)
+type commit
+tag rosten
+EOF
+
+test_expect_success 'cope with tagger-less tags' '
+
+ TAG=$(git hash-object -t tag -w tag-content) &&
+ git update-ref refs/tags/sonnenschein $TAG &&
+ git fast-export -C -C --signed-tags=strip --all > output &&
+ test $(grep -c "^tag " output) = 4 &&
+ ! grep "Unspecified Tagger" output &&
+ git fast-export -C -C --signed-tags=strip --all \
+ --fake-missing-tagger > output &&
+ test $(grep -c "^tag " output) = 4 &&
+ grep "Unspecified Tagger" output
+
+'
+
test_done
