[PATCH 2/2] fast-import: introduce "feature notes" command
- From
Jonathan Nieder <jrnieder@gmail.com>
- Date
- Feb 9, 2011, 22:43 UTC
- Message-ID
- <20110209224357.GB17128@elie>
- In-Reply-To
- <20110209214638.GA16716@elie>
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@student.ethz.ch> Improved-by: Sverre Rabbelier <srabbelier@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> --- 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