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| author | Jonathan Tan <jonathantanmy@google.com> | 2017-04-12 11:06:02 -0700 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2017-04-17 18:51:28 -0700 |
| commit | 8e2c7bef034f0712c6db776974ee4b40f1150a56 (patch) | |
| tree | 25374441886d2f25ab5cdeb9d4785b692b5aff25 | |
| parent | 49800c940790cc7465d1b03e08d472ffd8684808 (diff) | |
| download | git-jt/fetch-pack-error-reporting.tar.gz | |
fetch-pack: show clearer error message upon ERRjt/fetch-pack-error-reporting
Currently, fetch-pack prints a confusing error message ("expected
ACK/NAK") when the server it's communicating with sends a pkt-line
starting with "ERR". Replace it with a less confusing error message.
Also update the documentation describing the fetch-pack/upload-pack
protocol (pack-protocol.txt) to indicate that "ERR" can be sent in the
place of "ACK" or "NAK". In practice, this has been done for quite some
time by other Git implementations (e.g. JGit sends "want $id not valid")
and by Git itself (since commit bdb31ea: "upload-pack: report "not our
ref" to client", 2017-02-23) whenever a "want" line references an object
that it does not have. (This is uncommon, but can happen if a repository
is garbage-collected during a negotiation.)
Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
| -rw-r--r-- | Documentation/technical/pack-protocol.txt | 7 | ||||
| -rw-r--r-- | fetch-pack.c | 2 |
2 files changed, 8 insertions, 1 deletions
diff --git a/Documentation/technical/pack-protocol.txt b/Documentation/technical/pack-protocol.txt index c59ac9936a..5b0ba3ef20 100644 --- a/Documentation/technical/pack-protocol.txt +++ b/Documentation/technical/pack-protocol.txt @@ -351,14 +351,19 @@ ACK after 'done' if there is at least one common base and multi_ack or multi_ack_detailed is enabled. The server always sends NAK after 'done' if there is no common base found. +Instead of 'ACK' or 'NAK', the server may send an error message (for +example, if it does not recognize an object in a 'want' line received +from the client). + Then the server will start sending its packfile data. ---- - server-response = *ack_multi ack / nak + server-response = *ack_multi ack / nak / error-line ack_multi = PKT-LINE("ACK" SP obj-id ack_status) ack_status = "continue" / "common" / "ready" ack = PKT-LINE("ACK" SP obj-id) nak = PKT-LINE("NAK") + error-line = PKT-LINE("ERR" SP explanation-text) ---- A simple clone may look like this (with no 'have' lines): diff --git a/fetch-pack.c b/fetch-pack.c index f12bfcdbb1..986b1efebc 100644 --- a/fetch-pack.c +++ b/fetch-pack.c @@ -240,6 +240,8 @@ static enum ack_type get_ack(int fd, unsigned char *result_sha1) return ACK; } } + if (skip_prefix(line, "ERR ", &arg)) + die(_("remote error: %s"), arg); die(_("git fetch-pack: expected ACK/NAK, got '%s'"), line); } |