vcs-svn: fix clang-analyzer error

vcs-svn/svndiff.c:298:3: warning: Assigned value is garbage or undefined
                off_t pre_off = pre_off; /* stupid GCC... */
                ^               ~~~~~~~

Signed-off-by: David Barr <davidbarr@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
vcs-svn: simplify cleanup in apply_one_window()

As a side-effect, fix clang-analyzer warning:

vcs-svn/svndiff.c:278:3: warning: expression result unused [-Wunused-value]
                error("invalid delta: incorrect postimage length");
                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

This warning caused by an insanely concise error() upstream.

Signed-off-by: David Barr <davidbarr@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
vcs-svn: prefer constcmp to prefixcmp

Comparisons in svndump.c are always guarded by length.
As a bonus, elimate dependency on prefixcmp for upstream.

Signed-off-by: David Barr <davidbarr@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
vcs-svn: prefer strstr over memmem

The common pattern is to use strstr to match a fixed needle.
As a bonus, elimate dependency on memmem for upstream.

Signed-off-by: David Barr <davidbarr@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
vcs-svn: fix signedness warnings

Stop mixing off_t and size_t.

Signed-off-by: David Barr <davidbarr@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
vcs-svn: drop no-op reset methods

Since v1.7.5~42^2~6 (vcs-svn: remove buffer_read_string)
buffer_reset() does nothing thus fast_export_reset() also.

Signed-off-by: David Barr <davidbarr@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
move git_version_string into version.c

The global git_version_string currently lives in git.c, but
doesn't have anything to do with the git wrapper. Let's move
it into its own file, where it will be more appropriate to
build more version-related functions.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
version: add git_user_agent function

This is basically a fancy way of saying "git/$GIT_VERSION",
except that it is overridable at build-time and through the
environment. Which means that people who don't want to
advertise their git version (for privacy or security
reasons) can tweak it.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
http: get default user-agent from git_user_agent

This means we will respect the GIT_USER_AGENT build-time
configuration and run-time environment variable.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
submodule: additional regression tests for relative URLs

Some additional tests are added to support regression testing of the changes in the
remainder of the series.

We also add a pristine copy of .gitmodules in anticipation of this being
required by later tests.

Signed-off-by: Jon Seymour <jon.seymour@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
submodule: document failure to handle relative superproject origin URLs

This test case documents several cases where handling of relative
superproject origin URLs doesn't produce an expected result.

submodule.{sub}.url in the superproject is incorrect in these cases:
  foo
  ./foo
  ./foo/bar

The remote.origin.url of the submodule is incorrect in the above cases
and also when the superproject origin URL is like:
  foo/bar
  ../foo
  ../foo/bar

Signed-off-by: Jon Seymour <jon.seymour@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
submodule: fix sync handling of some relative superproject origin URLs

When the origin URL of the superproject is itself relative, git submodule sync
configures the remote.origin.url configuration property of the submodule
with a path that is relative to the work tree of the superproject
rather than the work tree of the submodule.

To fix this an 'up_path' that navigates from the work tree of the submodule
to the work tree of the superproject needs to be prepended to the URL
otherwise calculated.

Correct handling of superproject origin URLs like foo, ./foo and ./foo/bar is
left to a subsequent patch since an additional change is required to handle
these cases.

The documentation of resolve_relative_url() is expanded to give a more thorough
description of the function's objective is intended to be.

This change also renames the url variable used by cmd_sync() to module_url
and introduces two new variables super_config_url and sub_origin_url to help
explain the purpose of the different urls derived from the module_url.

Signed-off-by: Jon Seymour <jon.seymour@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
submodule: fix handling of superproject origin URLs like foo, ./foo and ./foo/bar

Currently git submodule init and git submodule sync fail with an error
if the superproject origin URL is of the form foo but succeeds if the
superproject origin URL is of the form ./foo or ./foo/bar or foo/bar.

This change makes handling of the foo case behave like the handling
of the ./foo case and also ensures that superfluous leading ./'s are
removed from the resulting derived URLs.

Signed-off-by: Jon Seymour <jon.seymour@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
api-credentials.txt: show the big picture first

The API documentation targets two kinds of developers: those using
the C API, and those writing remote-helpers.

The document was not clear about which part was useful to which
category, and for example, the C API could be mistakenly thought as
an API for writting remote helpers.

Based-on-patch-by: Jeff King <peff@peff.net>
Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
api-credentials.txt: add "see also" section

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
api-credentials.txt: mention credential.helper explicitly

The name of the configuration variable was mentioned only at the very
end of the explanation, in a place specific to a specific rule, hence it
was not very clear what the specification was about.

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'cr/persistent-https' into jch

A remote helper that acts as a proxy that caches ssl session for the
https:// transport is added to the contrib/ area.

By Colby Ranger
* cr/persistent-https:
  Add persistent-https to contrib
ls-files -i: pay attention to exclusion of leading paths

"git ls-files --exclude=t/ -i" does not show paths in directory t/
that have been added to the index, but it should.

The excluded() API was designed for callers who walk the tree from
the top, checking each level of the directory hierarchy as it
descends if it is excluded, and not even bothering to recurse into
an excluded directory.  This would allow us optimize for a common
case by not having to check if the exclude pattern "foo/" matches
when looking at "foo/bar", because the caller should have noticed
that "foo" is excluded and did not even bother to read "foo/bar"
out of opendir()/readdir() to call it.

The code for "ls-files -i" however walks the index linearly, feeding
paths without checking if the leading directory is already excluded.

Introduce a helper function path_excluded() to let this caller
properly call excluded() check for higher hierarchies as necessary.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
ls-files -i: micro-optimize path_excluded()

As we know a caller that does not recurse is calling us in the index
order, we can remember the last directory we found to be excluded
and see if the path we are looking at is still inside it, in which
case we can just answer that it is excluded.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'nl/http-proxy-more' into pu

I queued only the later two patches from this series, even though they do
not make much sense without the first one that seems to need a bit more
work, so that we won't forget.

By Jeff King (1) and Nelson Benitez Leon (1)
* nl/http-proxy-more:
  http: rename HTTP_REAUTH to HTTP_AUTH_RETRY
  http: Avoid limit of retrying request only twice