ssh test: make copy_ssh_wrapper_as clean up after itself
Simplify by not allowing the copied ssh wrapper to persist between
tests. This way, tests can be safely reordered, added, and removed
with less fear of hidden side effects.
This also avoids having to call setup_ssh_wrapper to restore the value
of GIT_SSH after this battery of tests, since it means each test will
restore it individually.
Noticed because on Windows, if `uplink.exe` exists, the MSYS2 Bash
will overwrite that when redirecting via `>uplink`. A proposed test
wrote a script to 'uplink' after a previous test created uplink.exe
using copy_ssh_wrapper_as, so the script written with '>uplink' had
the wrong filename and failed.
Reported-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Acked-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
everything_local: use "quick" object existence check
In b495697b82 (fetch-pack: avoid repeatedly re-scanning pack
directory, 2013-01-26), we noticed that everything_local()
could waste time trying to find and parse objects which we
_expect_ to be missing. The solution was to put
has_sha1_file() in front of parse_object() to skip the
more-expensive parse attempt.
That optimization was negated later when has_sha1_file()
learned to do the same re-scan in 45e8a74873 (has_sha1_file:
re-check pack directory before giving up, 2013-08-30).
We can restore it by using the "quick" flag to tell
has_sha1_file (actually has_object_file these days) that we
prefer speed to thoroughness for this call. See also the
fixes in 5827a0354 and 0eeb077be7 for prior art and
discussion on using the "quick" flag for these cases.
The recently-added performance regression test in p5551
demonstrates the problem. You can see the original fix:
Test b495697b82^ b495697b82
--------------------------------------------------------
5551.4: fetch 1.68(1.33+0.35) 0.87(0.69+0.18) -48.2%
and then the regression:
Test 45e8a74873^ 45e8a74873
---------------------------------------------------------
5551.4: fetch 0.96(0.77+0.19) 2.55(2.04+0.50) +165.6%
and now our fix:
Test HEAD^ HEAD
--------------------------------------------------------
5551.4: fetch 7.21(6.58+0.63) 5.47(5.04+0.43) -24.1%
You can also see that other things have gotten a lot slower
since 2013. We'll deal with those in separate patches.
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
p5551: add a script to test fetch pack-dir rescans
Since fetch often deals with object-ids we don't have (yet),
it's an easy mistake for it to use a function like
parse_object() that gives the correct result (e.g., NULL)
but does so very slowly (because after failing to find the
object, we re-scan the pack directory looking for new
packs).
The regular test suite won't catch this because the end
result is correct, but we would want to know about
performance regressions, too. Let's add a test to the
regression suite.
Note that this uses a synthetic repository that has a large
number of packs. That's not ideal, as it means we're not
testing what "normal" users see (in fact, some of these
problems have existed for ages without anybody noticing
simply because a rescan on a normal repository just isn't
that expensive).
So what we're really looking for here is the spike you'd
notice in a pathological case (a lot of unknown objects
coming into a repo with a lot of packs). If that's fast,
then the normal cases should be, too.
Note that the test also makes liberal use of $MODERN_GIT for
setup; some of these regressions go back a ways, and we
should be able to use it to find the problems there.
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
We have a function to create a bunch of irrelevant packs to
measure the expense of reprepare_packed_git(). Let's make
that available to other perf scripts.
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Let's make it clear how patches should flow into
contrib/git-jump. The normal Git maintainer does not
necessarily care about things in contrib/, and authors of
individual components should be the ones giving the final
review/ack for a patch. Ditto for bug reports, which are
likely to get more attention from the area expert.
Signed-off-by: Jeff King <peff@peff.net> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
contrib/git-jump: allow to configure the grep command
Add the configuration option "jump.grepCmd" that allows to configure the
command that is used to search in grep mode. This allows the users of
git-jump to use ag(1) or ack(1) as search engines.
Signed-off-by: Beat Bolli <dev+git@drbeat.li> Reviewed-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
grep: show non-empty lines before functions with -W
Non-empty lines before a function definition are most likely comments
for that function and thus relevant. Include them in function context.
Such a non-empty line might also belong to the preceding function if
there is no separating blank line. Stop extending the context upwards
also at the next function line to make sure only one extra function body
is shown at most.
Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Function context can be bigger than -A/-B/-C context. To find the
beginning of the combined context we search backwards. Currently we
check at each loop iteration what we're looking for and determine the
effective upper boundary based on that.
Simplify this a bit by setting the variable "from" to the lowest unshown
line number up front if we're looking for a function line and set it
back to the required -B/-C context line number when we find one. This
prepares the ground for the next patch; no functional change intended.
Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
t7810: improve check of -W with user-defined function lines
The check for function context (-W) together with user-defined function
line patterns reuses hello.c and pretends it's written in a language in
which function lines contain either "printf" or a trailing curly brace.
That's a bit obscure.
Make the test easier to read by adding a small PowerShell script, using
a simple, but meaningful expression, and separating out checks for
different aspects into dedicated tests instead of simply matching the
whole output byte for byte.
Also include a test for showing comments before function lines like git
xdiff: show non-empty lines before functions with -W
Non-empty lines before a function definition are most likely comments
for that function and thus relevant. Include them in function context.
Such a non-empty line might also belong to the preceeding function if
there is no separating blank line. Stop extending the context upwards
also at the next function line to make sure only one extra function body
is shown at most.
Original-patch-by: Vegard Nossum <vegard.nossum@oracle.com> Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
t4051: add test for comments preceding function lines
When showing function context it would be helpful to show comments
immediately before declarations, as they are most likely relevant.
Add a test for that, but without specifying the choice of lines too
rigidly in the test---we may want to stop before and not include
"/*" in the future, for example.
Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This is similar to ff1e72483 (tag: change default of `pager.tag` to
"on", 2017-08-02) and is safe now that we do not consider `pager.branch`
at all when we are not listing branches. This change will help with
listing many branches, but will not hurt users of `git branch
--edit-description` as it would have before the previous commit.
Signed-off-by: Martin Ågren <martin.agren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Similar to de121ffe5 (tag: respect `pager.tag` in list-mode only,
2017-08-02), use the DELAY_PAGER_CONFIG-mechanism to only respect
`pager.branch` when we are listing branches.
We have two possibilities of generalizing what that earlier commit made
to `git tag`. One is to interpret, e.g., --set-upstream-to as "it does
not use an editor, so we should page". Another, the one taken by this
commit, is to say "it does not list, so let's not page". That is in line
with the approach of the series on `pager.tag` and in particular the
wording in Documentation/git-tag.txt, which this commit reuses for
git-branch.txt.
This fixes the failing test added in the previous commit. Also adapt the
test for whether `git branch --set-upstream-to` respects `pager.branch`.
Signed-off-by: Martin Ågren <martin.agren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
The next couple of commits will change how `git branch` handles
`pager.branch`, similar to how de121ffe5 (tag: respect `pager.tag` in
list-mode only, 2017-08-02) and ff1e72483 (tag: change default of
`pager.tag` to "on", 2017-08-02) changed `git tag`.
Add tests in this area to make sure that we don't regress and so that
the upcoming commits can be made clearer by adapting the tests. Add some
tests for `--list` (implied), one for `--edit-description`, and one for
`--set-upstream-to` as a representative of "something other than the
first two".
In particular, use `test_expect_failure` to document that we currently
respect the pager-configuration with `--edit-description`. The current
behavior is buggy since the pager interferes with the editor and makes
the end result completely broken. See also b3ee740c8 (t7006: add tests
for how git tag paginates, 2017-08-02).
Signed-off-by: Martin Ågren <martin.agren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
d9bd4cbb9cc (config: flip return value of store_write_*()) made
write_section() follow the convention of write(2) to return -1 on error
and the number of written bytes on success. 3b48045c6c7 (Merge branch
'sd/branch-copy') changed it back to returning 0 on error and 1 on
success, but left its callers still checking for negative values.
Let write_section() follow the convention of write(2) again to meet the
expectations of its callers.
Reported-by: Jeff King <peff@peff.net> Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Add --expiry-date as a data-type for config files when
'git config --get' is used. This will return any relative
or fixed dates from config files as timestamps.
This is useful for scripts (e.g. gc.reflogexpire) that work
with timestamps so that '2.weeks' can be converted to a format
acceptable by those scripts/functions.
Following the convention of git_config_pathname(), move
the helper function required for this feature from
builtin/reflog.c to builtin/config.c where other similar
functions exist (e.g. for --bool or --path), and match
the order of parameters with other functions (i.e. output
pointer as first parameter).
Signed-off-by: Haaris Mehmood <hsed@unimetic.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some diff implementations don't report missing newlines at the end of
files. Applying such a patch can cause a newline character to be
added inadvertently. The option --inaccurate-eof of git apply can be
used to remove trailing newlines if needed.
apply_one_fragment() cuts it off from the buffers for preimage and
postimage. Before it does, it builds an array with the lengths of each
line for both. Make sure to update the length of the last line in
these line info structures as well to keep them consistent with their
respective buffer.
Without this fix the added test fails; git apply dies and reports:
In 52d59cc645 (branch: add a --copy (-c) option to go with --move (-m),
2017-06-18), `git branch` learned a `--copy` option. Include it when
providing command completions.
Signed-off-by: Todd Zullinger <tmz@pobox.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Support for the --set-upstream option was removed in 52668846ea
(builtin/branch: stop supporting the "--set-upstream" option,
2017-08-17), after a long deprecation period.
Remove the option from the command synopsis for consistency. Replace
another reference to it in the description of `--delete` with
`--set-upstream-to`.
Signed-off-by: Todd Zullinger <tmz@pobox.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
sequencer: reschedule pick if index can't be locked
If the index cannot be locked in do_recursive_merge(), issue an
error message and go on to the error recovery codepath, instead of
dying. When the commit cannot be picked, it needs to be rescheduled
when performing an interactive rebase, but just dying there won't
allow that to happen, and when the user runs 'git rebase --continue'
rather than 'git rebase --abort', the commit gets silently dropped.
When debugging, print the received argument at the start of the
function instead of in the middle. This ensures that the received
argument is printed in all code paths, and also allows a subsequent
refactoring to not need to move the "arg" parameter.
Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
builtin/describe.c: rename `oid` to avoid variable shadowing
The function `describe` has already a variable named `oid` declared at
the beginning of the function for an object id. Do not shadow that
variable with a pointer to an object id.
Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
revision.h: introduce blob/tree walking in order of the commits
The functionality to list tree objects in the order they were seen
while traversing the commits will be used in one of the next commits,
where we teach `git describe` to describe not only commits, but blobs, too.
The change in list-objects.c is rather minimal as we'll be re-using
the infrastructure put in place of the revision walking machinery. For
example one could expect that add_pending_tree is not called, but rather
commit->tree is directly passed to the tree traversal function. This
however requires a lot more code than just emptying the queue containing
trees after each commit.
Signed-off-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
As explained in commit 06f46f237 (avoid "write_in_full(fd, buf, len)
!= len" pattern, 2017–09–13) the return value of write_in_full() is
either -1 or the requested number of bytes. As such comparing the
return value to an unsigned value such as strbuf.len will fail to
catch errors. Change the code to use the preferred '< 0' check.
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
In commit 0024a5492 (Fix the rename detection limit checking; 2007-09-14),
the renameLimit was clamped to 32767. This appears to have been to simply
avoid integer overflow in the following computation:
although it also could be viewed as a hardcoded bound on the amount of CPU
time we're willing to allow users to tell git to spend on handling
renames. An upper bound may make sense, but unfortunately this upper
bound was neither communicated to the users, nor documented anywhere.
Although large limits can make things slow, we have users who would be
ecstatic to have a small five file change be correctly cherry picked even
if they have to manually specify a large limit and wait ten minutes for
the renames to be detected.
Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
progress: fix progress meters when dealing with lots of work
The possibility of setting merge.renameLimit beyond 2^16 raises the
possibility that the values passed to progress can exceed 2^32.
Use uint64_t, because it "ought to be enough for anybody". :-)
Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
merge-recursive: handle addition of submodule on our side of history
The code for a newly added path assumed that the path was a normal file,
and thus checked for there being a directory still being in the way of
the file. Note that since unpack_trees() does path-in-the-way checks
already, the only way for there to be a directory in the way at this
point in the code, is if there is some kind of D/F conflict in the merge.
For a submodule addition on HEAD's side of history, the submodule would
have already been present. This means that we do expect there to be a
directory present but should not consider it to be "in the way"; instead,
it's the expected submodule. So, when there's a submodule addition from
HEAD's side, don't bother checking the working copy for a directory in
the way.
Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git bisect run" that did not specify any command to run used to go
ahead and treated all commits to be tested as 'good'. This has
been corrected by making the command error out.
* sb/bisect-run-empty:
bisect run: die if no command is given
The remote-helper for talking to MediaWiki has been updated to
work with mediawiki namespaces.
* ab/mediawiki-namespace:
remote-mediawiki: show progress while fetching namespaces
remote-mediawiki: process namespaces in order
remote-mediawiki: support fetching from (Main) namespace
remote-mediawiki: skip virtual namespaces
remote-mediawiki: show known namespace choices on failure
remote-mediawiki: allow fetching namespaces with spaces
remote-mediawiki: add namespace support
The "--format=..." option "git for-each-ref" takes learned to show
the name of the 'remote' repository and the ref at the remote side
that is affected for 'upstream' and 'push' via "%(push:remotename)"
and friends.
* js/for-each-ref-remote-name-and-ref:
for-each-ref: test :remotename and :remoteref
for-each-ref: let upstream/push report the remote ref name
for-each-ref: let upstream/push optionally report the remote name
* mh/tidy-ref-update-flags:
refs: update some more docs to use "oid" rather than "sha1"
write_packed_entry(): take `object_id` arguments
refs: rename constant `REF_ISPRUNING` to `REF_IS_PRUNING`
refs: rename constant `REF_NODEREF` to `REF_NO_DEREF`
refs: tidy up and adjust visibility of the `ref_update` flags
ref_transaction_add_update(): remove a check
ref_transaction_update(): die on disallowed flags
prune_ref(): call `ref_transaction_add_update()` directly
files_transaction_prepare(): don't leak flags to packed transaction
* ma/bisect-leakfix:
bisect: fix memory leak when returning best element
bisect: fix off-by-one error in `best_bisection_sorted()`
bisect: fix memory leak in `find_bisection()`
bisect: change calling-convention of `find_bisection()`
* rs/sequencer-rewrite-file-cleanup:
sequencer.c: check return value of close() in rewrite_file()
sequencer: use O_TRUNC to truncate files
sequencer: factor out rewrite_file()
Recent update to the refs infrastructure implementation started
rewriting packed-refs file more often than before; this has been
optimized again for most trivial cases.
* mh/avoid-rewriting-packed-refs:
files-backend: don't rewrite the `packed-refs` file unnecessarily
t1409: check that `packed-refs` is not rewritten unnecessarily
Merge branch 'js/mingw-redirect-std-handles' into maint
MinGW updates.
* js/mingw-redirect-std-handles:
mingw: document the standard handle redirection
mingw: optionally redirect stderr/stdout via the same handle
mingw: add experimental feature to redirect standard handles
Merge branch 'dk/libsecret-unlock-to-load-fix' into maint
The credential helper for libsecret (in contrib/) has been improved
to allow possibly prompting the end user to unlock secrets that are
currently locked (otherwise the secrets may not be loaded).
"git check-ref-format --branch @{-1}" bit a "BUG()" when run
outside a repository for obvious reasons; clarify the documentation
and make sure we do not even try to expand the at-mark magic in
such a case, but still call the validation logic for branch names.
* jc/check-ref-format-oor:
check-ref-format doc: --branch validates and expands <branch>
check-ref-format --branch: strip refs/heads/ using skip_prefix
check-ref-format --branch: do not expand @{...} outside repository
Merge branch 'js/submodule-in-excluded' into maint
"git status --ignored -u" did not stop at a working tree of a
separate project that is embedded in an ignored directory and
listed files in that other project, instead of just showing the
directory itself as ignored.
* js/submodule-in-excluded:
status: do not get confused by submodules in excluded directories
Merge branch 'sb/diff-color-moved-use-xdl-recmatch' into maint
Instead of using custom line comparison and hashing functions to
implement "moved lines" coloring in the diff output, use the pair
of these functions from lower-layer xdiff/ code.
* sb/diff-color-moved-use-xdl-recmatch:
diff.c: get rid of duplicate implementation
xdiff-interface: export comparing and hashing strings
The experimental "color moved lines differently in diff output"
feature was buggy around "ignore whitespace changes" edges, whihch
has been corrected.
* jk/diff-color-moved-fix:
diff: handle NULs in get_string_hash()
diff: fix whitespace-skipping with --color-moved
t4015: test the output of "diff --color-moved -b"
t4015: check "negative" case for "-w --color-moved"
t4015: refactor --color-moved whitespace test
Merge branch 'kd/auto-col-with-pager-fix' into maint
"auto" as a value for the columnar output configuration ought to
judge "is the output consumed by humans?" with the same criteria as
"auto" for coloured output configuration, i.e. either the standard
output stream is going to tty, or a pager is in use. We forgot the
latter, which has been fixed.
* kd/auto-col-with-pager-fix:
column: do not include pager.c
column: show auto columns when pager is active
strbuf_check_branch_ref() is the central place where many codepaths
see if a proposed name is suitable for the name of a branch. It was
designed to allow us to get stricter than the check_refname_format()
check used for refnames in general, and we already use it to reject
a branch whose name begins with a '-'. The function gets a strbuf
and a string "name", and returns non-zero if the name is not
appropriate as the name for a branch. When the name is good, it
places the full refname for the branch with the proposed name in the
strbuf before it returns.
However, it turns out that one caller looks at what is in the strbuf
even when the function returns an error. Make the function populate
the strbuf even when it returns an error. That way, when "-dash" is
given as name, "refs/heads/-dash" is placed in the strbuf when
returning an error to copy_or_rename_branch(), which notices that
the user is trying to recover with "git branch -m -- -dash dash" to
rename "-dash" to "dash".
While at it, use the same mechanism to also reject "HEAD" as a
branch name.
Helped-by: Jeff King <peff@peff.net> Helped-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
notes: send "Automatic notes merge failed" messages to stderr
All other error messages from notes use stderr. Do the same when
alerting users of an unresolved notes merge.
Fix the output redirection in t3310 and t3320 as well. Previously, the
tests directed output to a file, but stderr was either not captured or
not sent to the file due to the order of the redirection operators.
Signed-off-by: Todd Zullinger <tmz@pobox.com> Acked-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
The intention is to ignore all output from the 'git stash apply' call.
Adjust the order of the redirection to ensure that both stdout and
stderr are redirected to /dev/null.
Signed-off-by: Todd Zullinger <tmz@pobox.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
t/lib-gpg: fix gpgconf stderr redirect to /dev/null
In 29ff1f8f74 (t: lib-gpg: flush gpg agent on startup, 2017-07-20), a
call to gpgconf was added to kill the gpg-agent. The intention was to
ignore all output from the call, but the order of the redirection needs
to be switched to ensure that both stdout and stderr are redirected to
/dev/null. Without this, gpgconf from gnupg-2.0 releases would output
'gpgconf: invalid option "--kill"' each time it was called.
Signed-off-by: Todd Zullinger <tmz@pobox.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
sequencer: warn when internal merge may be suboptimal due to renameLimit
When many files were renamed, the recursive merge strategy stopped
detecting renames and left many paths with delete/modify conflicts,
without any warning about what was going on or providing any hints about
how to tell Git to spend more cycles to detect renames.
Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
The set of paths output from "git status --ignored" was tied
closely with its "--untracked=<mode>" option, but now it can be
controlled more flexibly. Most notably, a directory that is
ignored because it is listed to be ignored in the ignore/exclude
mechanism can be handled differently from a directory that ends up
to be ignored only because all files in it are ignored.
* jm/status-ignored-files-list:
status: test ignored modes
status: document options to show matching ignored files
status: report matching ignored and normal untracked
status: add option to show ignored files differently
If an empty string is passed to link_alt_odb_entries(), our
loop finds no entries and we link nothing. But we still do
some preparatory work to normalize the object directory
path, even though we'll never look at the result. This
triggers in basically every git process, since we feed the
usually-empty ALTERNATE_DB_ENVIRONMENT to the function.
Let's detect early that there's nothing to do and return.
While we're at it, let's treat NULL the same as an empty
string as a favor to our callers. That saves
prepare_alt_odb() from having to cover this case.
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Documentation: convert SubmittingPatches to AsciiDoc
The SubmittingPatches document is often cited by outside parties as an
example of good practices to follow, including logical, independent
commits; patch sign-offs; and sending patches to a mailing list.
Currently, people who want to cite a particular section tend to either
refer to it by name and let the interested party search through the
document to find it, or link to a given line number on GitHub and hope
the file doesn't change.
Instead, convert the document to AsciiDoc. Build it as part of the
technical documentation, since it is likely of interest to the same
group of people. Provide stable links to the sections which outside
parties are likely to want to link to. Make some minor structural
changes to organize it so that it can be formatted sanely.
Since the makefile needs a .txt extension in order to build with the
rest of the documentation, simply copy the file. Ignore the temporary
file so it doesn't get checked in accidentally, and remove it as part of
the clean process. Do this instead of renaming the file so that people
who have already linked to the documentation (who we're trying to help)
don't find their links broken. Avoid symlinking since Windows will not
like that.
This allows us to render the document as part of the website for the
benefit of others who wish to link to it as well as providing a more
nicely formatted display for our community and potential contributors.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
In future versions of Git, we plan to support an additional hash
algorithm. Integrate the enumeration of hash algorithms with repository
setup, and store a pointer to the enumerated data in struct repository.
Of course, we currently only support SHA-1, so hard-code this value in
read_repository_format. In the future, we'll enumerate this value from
the configuration.
Add a constant, the_hash_algo, which points to the hash_algo structure
pointer in the repository global. Note that this is the hash which is
used to serialize data to disk, not the hash which is used to display
items to the user. The transition plan anticipates that these may be
different. We can add an additional element in the future (say,
ui_hash_algo) to provide for this case.
Include repository.h in cache.h since we now need to have access to
these struct and variable definitions.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Since in the future we want to support an additional hash algorithm, add
a structure that represents a hash algorithm and all the data that must
go along with it. Add a constant to allow easy enumeration of hash
algorithms. Implement function typedefs to create an abstract API that
can be used by any hash algorithm, and wrappers for the existing SHA1
functions that conform to this API.
Expose a value for hex size as well as binary size. While one will
always be twice the other, the two values are both used extremely
commonly throughout the codebase and providing both leads to improved
readability.
Don't include an entry in the hash algorithm structure for the null
object ID. As this value is all zeros, any suitably sized all-zero
object ID can be used, and there's no need to store a given one on a
per-hash basis.
The current hash function transition plan envisions a time when we will
accept input from the user that might be in SHA-1 or in the NewHash
format. Since we cannot know which the user has provided, add a
constant representing the unknown algorithm to allow us to indicate that
we must look the correct value up. Provide dummy API functions that die
in this case.
Finally, include git-compat-util.h in hash.h so that the required types
are available. This aids people using automated tools their editors.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
We enumerate several different items as part of struct
repository_format, but then actually set up those values using the
global variables we've initialized from them. Instead, let's pass a
pointer to the structure down to the code where we enumerate these
values, so we can later on use those values directly to perform setup.
This technique makes it easier for us to determine additional items
about the repository format (such as the hash algorithm) and then use
them for setup later on, without needing to add additional global
variables. We can't avoid using the existing global variables since
they're intricately intertwined with how things work at the moment, but
this improves things for the future.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
It was possible to invoke "git bisect run" without any command.
This considers all commits as good commits since "$@"'s return
value for empty $@ is 0.
This is most probably not what a user wants (otherwise she would
invoke "git bisect run true"), so not providing a command now
results in an error.
Signed-off-by: Stephan Beyer <s-beyer@gmx.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>