Here is a 'feature' command for streams to use to require support for
the notemodify (N) command.
When the 'feature' facility was introduced (v1.7.0-rc0~95^2~4,
2009-12-04), the notes import feature was old news (v1.6.6-rc0~21^2~8,
2009-10-09) and it was not obvious it deserved to be a named feature.
But now that is clear, since all major non-git fast-import backends
lack support for it.
Details: on git version with this patch applied, any "feature notes"
command in the features/options section at the beginning of a stream
will be treated as a no-op. On fast-import implementations without
the feature (and older git versions), the command instead errors out
with a message like
This version of fast-import does not support feature notes.
So by declaring use of notes at the beginning of a stream, frontends
can avoid wasting time and other resources when the backend does not
support notes. (This would be especially important for backends that
do not support rewinding history after a botched import.)
Improved-by: Thomas Rast <trast@xxxxxxxxxxxxxxx>
Improved-by: Sverre Rabbelier <srabbelier@xxxxxxxxx>
Signed-off-by: Jonathan Nieder <jrnieder@xxxxxxxxx>
---
Documentation/git-fast-import.txt | 6 ++++++
fast-import.c | 2 ++
t/t9301-fast-import-notes.sh | 1 +
3 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/Documentation/git-fast-import.txt b/Documentation/git-fast-import.txt
index 3bf04e3..becee8b 100644
--- a/Documentation/git-fast-import.txt
+++ b/Documentation/git-fast-import.txt
@@ -898,6 +898,12 @@ import-marks::
second, an --import-marks= command-line option overrides
any "feature import-marks" command in the stream.
+notes::
+ Require that the backend support the 'notemodify' (N)
+ subcommand to the 'commit' command.
+ Versions of fast-import not supporting notes will exit
+ with a message indicating so.
+
`option`
~~~~~~~~
Processes the specified option so that git fast-import behaves in a
diff --git a/fast-import.c b/fast-import.c
index 74f08bd..ff56ea2 100644
--- a/fast-import.c
+++ b/fast-import.c
@@ -2821,6 +2821,8 @@ static int parse_one_feature(const char *feature, int from_stream)
relative_marks_paths = 0;
} else if (!prefixcmp(feature, "force")) {
force_update = 1;
+ } else if (!strcmp(feature, "notes")) {
+ ; /* do nothing; we have the feature */
} else {
return 0;
}
diff --git a/t/t9301-fast-import-notes.sh b/t/t9301-fast-import-notes.sh
index a5c99d8..164edf0 100755
--- a/t/t9301-fast-import-notes.sh
+++ b/t/t9301-fast-import-notes.sh
@@ -120,6 +120,7 @@ test_expect_success 'add notes with simple M command' '
test_tick
cat >input <<INPUT_END
+feature notes
commit refs/notes/test
committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
data <<COMMIT
--
1.7.4
--
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