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"git fetch" and "git push" support negative refspecs.
* jk/refspecs-negative:
refspec: add support for negative refspecs
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Both fetch and push support pattern refspecs which allow fetching or
pushing references that match a specific pattern. Because these patterns
are globs, they have somewhat limited ability to express more complex
situations.
For example, suppose you wish to fetch all branches from a remote except
for a specific one. To allow this, you must setup a set of refspecs
which match only the branches you want. Because refspecs are either
explicit name matches, or simple globs, many patterns cannot be
expressed.
Add support for a new type of refspec, referred to as "negative"
refspecs. These are prefixed with a '^' and mean "exclude any ref
matching this refspec". They can only have one "side" which always
refers to the source. During a fetch, this refers to the name of the ref
on the remote. During a push, this refers to the name of the ref on the
local side.
With negative refspecs, users can express more complex patterns. For
example:
git fetch origin refs/heads/*:refs/remotes/origin/* ^refs/heads/dontwant
will fetch all branches on origin into remotes/origin, but will exclude
fetching the branch named dontwant.
Refspecs today are commutative, meaning that order doesn't expressly
matter. Rather than forcing an implied order, negative refspecs will
always be applied last. That is, in order to match, a ref must match at
least one positive refspec, and match none of the negative refspecs.
This is similar to how negative pathspecs work.
Signed-off-by: Jacob Keller <jacob.keller@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Add a function for building a refspec using printf-style formatting. It
frees callers from managing their own buffer. Use it throughout the
tree to shorten and simplify its callers.
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Code which split an argv_array call across multiple lines, like:
argv_array_pushl(&args, "one argument",
"another argument", "and more",
NULL);
was recently mechanically renamed to use strvec, which results in
mis-matched indentation like:
strvec_pushl(&args, "one argument",
"another argument", "and more",
NULL);
Let's fix these up to align the arguments with the opening paren. I did
this manually by sifting through the results of:
git jump grep 'strvec_.*,$'
and liberally applying my editor's auto-format. Most of the changes are
of the form shown above, though I also normalized a few that had
originally used a single-tab indentation (rather than our usual style of
aligning with the open paren). I also rewrapped a couple of obvious
cases (e.g., where previously too-long lines became short enough to fit
on one), but I wasn't aggressive about it. In cases broken to three or
more lines, the grouping of arguments is sometimes meaningful, and it
wasn't worth my time or reviewer time to ponder each case individually.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We eventually want to drop the argv_array name and just use strvec
consistently. There's no particular reason we have to do it all at once,
or care about interactions between converted and unconverted bits.
Because of our preprocessor compat layer, the names are interchangeable
to the compiler (so even a definition and declaration using different
names is OK).
This patch converts all of the remaining files, as the resulting diff is
reasonably sized.
The conversion was done purely mechanically with:
git ls-files '*.c' '*.h' |
xargs perl -i -pe '
s/ARGV_ARRAY/STRVEC/g;
s/argv_array/strvec/g;
'
We'll deal with any indentation/style fallouts separately.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This requires updating #include lines across the code-base, but that's
all fairly mechanical, and was done with:
git ls-files '*.c' '*.h' |
xargs perl -i -pe 's/argv-array.h/strvec.h/'
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Switch a use of GIT_SHA1_HEXSZ to use the_hash_algo.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Many messages will be marked for translation in the following
commits. This commit updates some of them to be more consistent and
reduce diff noise in those commits. Changes are
- keep the first letter of die(), error() and warning() in lowercase
- no full stop in die(), error() or warning() if it's single sentence
messages
- indentation
- some messages are turned to BUG(), or prefixed with "BUG:" and will
not be marked for i18n
- some messages are improved to give more information
- some messages are broken down by sentence to be i18n friendly
(on the same token, combine multiple warning() into one big string)
- the trailing \n is converted to printf_ln if possible, or deleted
if not redundant
- errno_errno() is used instead of explicit strerror()
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Make refspec parsing codepath more robust.
* ab/refspec-init-fix:
refspec: initalize `refspec_item` in `valid_fetch_refspec()`
refspec: add back a refspec_item_init() function
refspec: s/refspec_item_init/&_or_die/g
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We allocate a `struct refspec_item` on the stack without initializing
it. In particular, its `dst` and `src` members will contain some random
data from the stack. When we later call `refspec_item_clear()`, it will
call `free()` on those pointers. So if the call to `parse_refspec()` did
not assign to them, we will be freeing some random "pointers". This is
undefined behavior.
To the best of my understanding, this cannot currently be triggered by
user-provided data. And for what it's worth, the test-suite does not
trigger this with SANITIZE=address. It can be provoked by calling
`valid_fetch_refspec(":*")`.
Zero the struct, as is done in other users of `struct refspec_item` by
using the refspec_item_init() initialization function.
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Re-add the non-fatal version of refspec_item_init_or_die() renamed
away in an earlier change to get a more minimal diff. This should be
used by callers that have their own error handling.
This new function could be marked "static" since nothing outside of
refspec.c uses it, but expecting future use of it, let's make it
available to other users.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Rename the refspec_item_init() function introduced in
6d4c057859 ("refspec: introduce struct refspec", 2018-05-16) to
refspec_item_init_or_die().
This follows the convention of other *_or_die() functions, and is done
in preparation for making it a wrapper for a non-fatal variant.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Hotfix.
* bw/refspec-api:
refspec-api: avoid uninitialized field in refspec item
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When v2.18.0-rc0~10^2~1 (refspec: consolidate ref-prefix generation
logic, 2018-05-16) factored out the ref-prefix generation code for
reuse, it left out the 'if (!item->exact_sha1)' test in the original
ref-prefix generation code. As a result, fetches by SHA-1 generate
ref-prefixes as though the SHA-1 being fetched were an abbreviated ref
name:
$ GIT_TRACE_PACKET=1 bin-wrappers/git -c protocol.version=2 \
fetch origin 12039e008f9a4e3394f3f94f8ea897785cb09448
[...]
packet: fetch> ref-prefix 12039e008f9a4e3394f3f94f8ea897785cb09448
packet: fetch> ref-prefix refs/12039e008f9a4e3394f3f94f8ea897785cb09448
packet: fetch> ref-prefix refs/tags/12039e008f9a4e3394f3f94f8ea897785cb09448
packet: fetch> ref-prefix refs/heads/12039e008f9a4e3394f3f94f8ea897785cb09448
packet: fetch> ref-prefix refs/remotes/12039e008f9a4e3394f3f94f8ea897785cb09448
packet: fetch> ref-prefix refs/remotes/12039e008f9a4e3394f3f94f8ea897785cb09448/HEAD
packet: fetch> 0000
If there is another ref name on the command line or the object being
fetched is already available locally, then that's mostly harmless.
But otherwise, we error out with
fatal: no matching remote head
since the server did not send any refs we are interested in. Filter
out the exact_sha1 refspecs to avoid this.
This patch adds a test to check this behavior that notices another
behavior difference between protocol v0 and v2 in the process. Add a
NEEDSWORK comment to clear it up.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When parse_refspec() function was created at 3eec3700 ("refspec:
factor out parsing a single refspec", 2018-05-16) to take a caller
supplied piece of memory to fill parsed refspec_item, it forgot that
a refspec without colon must set item->dst to NULL to let the users
of refspec know that the result of the fetch does not get stored in
an ref on our side.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When using protocol v2 a client constructs a list of ref-prefixes which
are sent across the wire so that the server can do server-side filtering
of the ref-advertisement. The logic that does this exists for both
fetch and push (even though no push support for v2 currently exists yet)
and is roughly the same so lets consolidate this logic and make it
general enough that it can be used for both the push and fetch cases.
Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Now that there are no callers of 'parse_push_refspec()',
'parse_fetch_refspec()', and 'free_refspec()', remove these
functions.
Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Convert 'valid_fetch_refspec()' to use the new 'parse_refspec()'
function to only parse a single refspec and eliminate an allocation.
Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Introduce 'struct refspec', an abstraction around a collection of
'struct refspec_item's much like how 'struct pathspec' holds a
collection of 'struct pathspec_item's.
A refspec struct also contains an array of the original refspec strings
which will be used to facilitate the migration to using this new
abstraction throughout the code base.
Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Factor out the logic which parses a single refspec into its own
function. This makes it easier to reuse this logic in a future patch.
Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In preparation for introducing an abstraction around a collection of
refspecs (much like how a 'struct pathspec' is a collection of 'struct
pathspec_item's) rename the existing 'struct refspec' to 'struct
refspec_item'.
Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In preparation for performing a refactor on refspec related code, move
the refspec parsing logic into its own file.
Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Junio C Hamano
Jacob Keller
René Scharfe
Jeff King
brian m. carlson
Nguyễn Thái Ngọc Duy
Martin Ågren
Ævar Arnfjörð Bjarmason
Jonathan Nieder
Brandon Williams