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Author SHA1 Message Date
Brandon Williams
5c2bd8b77a submodule--helper: add is-active subcommand
The definition of which submodules are of interest by the user
is tied to the configuration submodule.<name>.url; when it is
set to a non-empty string, it is of interest.  We'd want to be
able to later change this definition, but there are many places
that explicitly check this condition in the scripted Porcelain.

Introduce the "is-active" subcommand to "submodule--helper", so
that the exact definition of what submodule is of interest can
be centrally defined (and changed in later steps).  In a few
patches that follow, this helper is used to replace the explicit
checks of the configuration variable in scripts.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-17 11:06:09 -07:00
Junio C Hamano
d6db3f2165 Third batch after 2.12
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-12 23:24:14 -07:00
Junio C Hamano
ff3898649b Merge branch 'ah/doc-ls-files-quotepath'
Documentation for "git ls-files" did not refer to core.quotePath

* ah/doc-ls-files-quotepath:
  Documentation: improve description for core.quotePath
2017-03-12 23:21:37 -07:00
Junio C Hamano
60f335b87f Merge branch 'jc/diff-populate-filespec-size-only-fix'
"git diff --quiet" relies on the size field in diff_filespec to be
correctly populated, but diff_populate_filespec() helper function
made an incorrect short-cut when asked only to populate the size
field for paths that need to go through convert_to_git() (e.g. CRLF
conversion).

* jc/diff-populate-filespec-size-only-fix:
  diff: do not short-cut CHECK_SIZE_ONLY check in diff_populate_filespec()
2017-03-12 23:21:36 -07:00
Junio C Hamano
6c621015f2 Merge branch 'vn/line-log-memcpy-size-fix'
The command-line parsing of "git log -L" copied internal data
structures using incorrect size on ILP32 systems.

* vn/line-log-memcpy-size-fix:
  line-log: use COPY_ARRAY to fix mis-sized memcpy
2017-03-12 23:21:35 -07:00
Junio C Hamano
cb36508ac5 Merge branch 'jk/ewah-use-right-type-in-sizeof'
Code clean-up.

* jk/ewah-use-right-type-in-sizeof:
  ewah: fix eword_t/uint64_t confusion
2017-03-12 23:21:35 -07:00
Junio C Hamano
36d5286f68 Merge branch 'ax/line-log-range-merge-fix'
The code to parse "git log -L..." command line was buggy when there
are many ranges specified with -L; overrun of the allocated buffer
has been fixed.

* ax/line-log-range-merge-fix:
  line-log.c: prevent crash during union of too many ranges
2017-03-12 23:21:34 -07:00
Junio C Hamano
271513cd54 Merge branch 'ss/remote-bzr-hg-placeholder-wo-python'
There is no need for Python only to give a few messages to the
standard error stream, but we somehow did.

* ss/remote-bzr-hg-placeholder-wo-python:
  contrib: git-remote-{bzr,hg} placeholders don't need Python
2017-03-12 23:21:34 -07:00
Junio C Hamano
ba37c92df9 Merge branch 'js/realpath-pathdup-fix'
Git v2.12 was shipped with an embarrassing breakage where various
operations that verify paths given from the user stopped dying when
seeing an issue, and instead later triggering segfault.

* js/realpath-pathdup-fix:
  real_pathdup(): fix callsites that wanted it to die on error
  t1501: demonstrate NULL pointer access with invalid GIT_WORK_TREE
2017-03-12 23:21:33 -07:00
Junio C Hamano
fb070d2f17 Merge branch 'jk/add-i-patch-do-prompt'
The patch subcommand of "git add -i" was meant to have paths
selection prompt just like other subcommand, unlike "git add -p"
directly jumps to hunk selection.  Recently, this was broken and
"add -i" lost the paths selection dialog, but it now has been
fixed.

* jk/add-i-patch-do-prompt:
  add--interactive: fix missing file prompt for patch mode with "-i"
2017-03-12 23:21:33 -07:00
Junio C Hamano
033328a5dc Merge branch 'jh/mingw-openssl-sha1'
Windows port wants to use OpenSSL's implementation of SHA-1
routines, so let them.

* jh/mingw-openssl-sha1:
  mingw: use OpenSSL's SHA-1 routines
2017-03-12 23:21:33 -07:00
Junio C Hamano
625568cd88 Second batch after 2.12
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-10 13:25:21 -08:00
Junio C Hamano
0a24610680 Merge branch 'rs/log-email-subject'
Code clean-up.

* rs/log-email-subject:
  pretty: use fmt_output_email_subject()
  log-tree: factor out fmt_output_email_subject()
2017-03-10 13:24:24 -08:00
Junio C Hamano
44c3f09fa5 Merge branch 'tg/stash-push'
"git stash save" takes a pathspec so that the local changes can be
stashed away only partially.

* tg/stash-push:
  stash: allow pathspecs in the no verb form
  stash: use stash_push for no verb form
  stash: teach 'push' (and 'create_stash') to honor pathspec
  stash: refactor stash_create
  stash: add test for the create command line arguments
  stash: introduce push verb
2017-03-10 13:24:24 -08:00
Junio C Hamano
ae900ebd71 Merge branch 'sb/submodule-init-url-selection'
When "git submodule init" decides that the submodule in the working
tree is its upstream, it now gives a warning as it is not a very
common setup.

* sb/submodule-init-url-selection:
  submodule init: warn about falling back to a local path
2017-03-10 13:24:24 -08:00
Junio C Hamano
fb907176de Merge branch 'rj/remove-unused-mktemp'
Code cleanup.

* rj/remove-unused-mktemp:
  wrapper.c: remove unused gitmkstemps() function
  wrapper.c: remove unused git_mkstemp() function
2017-03-10 13:24:24 -08:00
Junio C Hamano
5886e75489 Merge branch 'ew/markdown-url-in-readme'
Doc update.

* ew/markdown-url-in-readme:
  README: create HTTP/HTTPS links from URLs in Markdown
2017-03-10 13:24:24 -08:00
Junio C Hamano
9664cef1eb Merge branch 'ps/docs-diffcore'
Doc update.

* ps/docs-diffcore:
  docs/diffcore: unquote "Complete Rewrites" in headers
  docs/diffcore: fix grammar in diffcore-rename header
2017-03-10 13:24:24 -08:00
Junio C Hamano
d0f549f403 Merge branch 'jt/http-base-url-update-upon-redirect'
When a redirected http transport gets an error during the
redirected request, we ignored the error we got from the server,
and ended up giving a not-so-useful error message.

* jt/http-base-url-update-upon-redirect:
  http: attempt updating base URL only if no error
2017-03-10 13:24:23 -08:00
Junio C Hamano
92718f57c2 Merge branch 'jk/http-auth'
Reduce authentication round-trip over HTTP when the server supports
just a single authentication method.

* jk/http-auth:
  http: add an "auto" mode for http.emptyauth
  http: restrict auth methods to what the server advertises
2017-03-10 13:24:23 -08:00
Junio C Hamano
ea1e784c47 Merge branch 'jh/send-email-one-cc'
"Cc:" on the trailer part does not have to conform to RFC strictly,
unlike in the e-mail header.  "git send-email" has been updated to
ignore anything after '>' when picking addresses, to allow non-address
cruft like " # stable 4.4" after the address.

* jh/send-email-one-cc:
  send-email: only allow one address per body tag
2017-03-10 13:24:23 -08:00
Junio C Hamano
fc32293502 Merge branch 'rs/strbuf-add-real-path'
An helper function to make it easier to append the result from
real_path() to a strbuf has been added.

* rs/strbuf-add-real-path:
  strbuf: add strbuf_add_real_path()
  cocci: use ALLOC_ARRAY
2017-03-10 13:24:23 -08:00
Junio C Hamano
82682e218a Merge branch 'rs/sha1-file-plug-fallback-base-leak'
A leak in a codepath to read from a packed object in (rare) cases
has been plugged.

* rs/sha1-file-plug-fallback-base-leak:
  sha1_file: release fallback base's memory in unpack_entry()
2017-03-10 13:24:23 -08:00
Junio C Hamano
98c96f8bff Merge branch 'rs/commit-parsing-optim'
The code that parses header fields in the commit object has been
updated for (micro)performance and code hygiene.

* rs/commit-parsing-optim:
  commit: don't check for space twice when looking for header
  commit: be more precise when searching for headers
2017-03-10 13:24:22 -08:00
Junio C Hamano
11cfc0ef96 Merge branch 'jk/t6300-cleanup'
A test that creates a confusing branch whose name is HEAD has been
corrected not to do so.

* jk/t6300-cleanup:
  t6300: avoid creating refs/heads/HEAD
2017-03-10 13:24:22 -08:00
Junio C Hamano
963792ed27 Merge branch 'jk/parse-config-key-cleanup'
The "parse_config_key()" API function has been cleaned up.

* jk/parse-config-key-cleanup:
  parse_hide_refs_config: tell parse_config_key we don't want a subsection
  parse_config_key: allow matching single-level config
  parse_config_key: use skip_prefix instead of starts_with
2017-03-10 13:24:22 -08:00
Junio C Hamano
3406129900 Merge branch 'sb/parse-hide-refs-config-cleanup'
Code clean-up.

* sb/parse-hide-refs-config-cleanup:
  refs: parse_hide_refs_config to use parse_config_key
2017-03-10 13:24:21 -08:00
Junio C Hamano
a729e4671a Merge branch 'jt/upload-pack-error-report'
"git upload-pack", which is a counter-part of "git fetch", did not
report a request for a ref that was not advertised as invalid.
This is generally not a problem (because "git fetch" will stop
before making such a request), but is the right thing to do.

* jt/upload-pack-error-report:
  upload-pack: report "not our ref" to client
2017-03-10 13:24:21 -08:00
Junio C Hamano
066c38ca17 Merge branch 'jk/ident-empty'
user.email that consists of only cruft chars should consistently
error out, but didn't.

* jk/ident-empty:
  ident: do not ignore empty config name/email
  ident: reject all-crud ident name
  ident: handle NULL email when complaining of empty name
  ident: mark error messages for translation
2017-03-10 13:24:21 -08:00
Junio C Hamano
2f54451ff5 Merge branch 'jc/config-case-cmdline-take-2'
The code to parse "git -c VAR=VAL cmd" and set configuration
variable for the duration of cmd had two small bugs, which have
been fixed.

* jc/config-case-cmdline-take-2:
  config: use git_config_parse_key() in git_config_parse_parameter()
  config: move a few helper functions up
2017-03-10 13:24:21 -08:00
Johannes Schindelin
ce83eadd9a real_pathdup(): fix callsites that wanted it to die on error
In 4ac9006f83 (real_path: have callers use real_pathdup and
strbuf_realpath, 2016-12-12), we changed the xstrdup(real_path())
pattern to use real_pathdup() directly.

The problem with this change is that real_path() calls
strbuf_realpath() with die_on_error = 1 while real_pathdup() calls
it with die_on_error = 0. Meaning that in cases where real_path()
causes Git to die() with an error message, real_pathdup() is silent
and returns NULL instead.

The callers, however, are ill-prepared for that change, as they expect
the return value to be non-NULL (and otherwise the function died
with an appropriate error message).

Fix this by extending real_pathdup()'s signature to accept the
die_on_error flag and simply pass it through to strbuf_realpath(),
and then adjust all callers after a careful audit whether they would
handle NULLs well.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-08 14:38:41 -08:00
Johannes Schindelin
aac3eaa624 t1501: demonstrate NULL pointer access with invalid GIT_WORK_TREE
When GIT_WORK_TREE does not specify a valid path, we should error
out, instead of crashing.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-08 14:38:22 -08:00
Hiroshi Shirosaki
e0688e9b28 git svn: fix authentication with 'branch'
Authentication fails with svn branch while svn rebase and
svn dcommit work fine without authentication failures.

$ git svn branch v7_3
Copying https://xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx at r27519
to https://xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/v7_3...
Can't create session: Unable to connect to a repository at URL
'https://xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx': No more
credentials or we tried too many times.
Authentication failed at
C:\Program Files\Git\mingw64/libexec/git-core\git-svn line 1200.

We add auth configuration to SVN::Client->new() to fix the issue.

Signed-off-by: Hiroshi Shirosaki <h.shirosaki@gmail.com>
Signed-off-by: Eric Wong <e@80x24.org>
2017-03-07 21:29:03 +00:00
Jeff King
3255e512a8 ewah: fix eword_t/uint64_t confusion
The ewah subsystem typedefs eword_t to be uint64_t, but some
code uses a bare uint64_t. This isn't a bug now, but it's a
potential maintenance problem if the definition of eword_t
ever changes. Let's use the correct type.

Note that we can't use COPY_ARRAY() here because the source
and destination point to objects of different sizes. For
that reason we'll also skip the usual "sizeof(*dst)" and use
the real type, which should make it more clear that there's
something tricky going on.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-06 12:03:40 -08:00
Vegard Nossum
07f546cda5 line-log: use COPY_ARRAY to fix mis-sized memcpy
This memcpy meant to get the sizeof a "struct range", not a
"range_set", as the former is what our array holds. Rather
than swap out the types, let's convert this site to
COPY_ARRAY, which avoids the problem entirely (and confirms
that the src and dst types match).

Note for curiosity's sake that this bug doesn't trigger on
I32LP64 systems, but does on ILP32 systems. The mistaken
"struct range_set" has two ints and a pointer. That's 16
bytes on LP64, or 12 on ILP32. The correct "struct range"
type has two longs, which is also 16 on LP64, but only 8 on
ILP32.

Likewise an IL32P64 system would experience the bug.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-06 12:01:02 -08:00
Allan Xavier
aaae0bf787 line-log.c: prevent crash during union of too many ranges
The existing implementation of range_set_union does not correctly
reallocate memory, leading to a heap overflow when it attempts to union
more than 24 separate line ranges.

For struct range_set *out to grow correctly it must have out->nr set to
the current size of the buffer when it is passed to range_set_grow.
However, the existing implementation of range_set_union only updates
out->nr at the end of the function, meaning that it is always zero
before this. This results in range_set_grow never growing the buffer, as
well as some of the union logic itself being incorrect as !out->nr is
always true.

The reason why 24 is the limit is that the first allocation of size 1
ends up allocating a buffer of size 24 (due to the call to alloc_nr in
ALLOC_GROW). This goes some way to explain why this hasn't been
caught before.

Fix the problem by correctly updating out->nr after reallocating the
range_set. As this results in out->nr containing the same value as the
variable o, replace o with out->nr as well.

Finally, add a new test to help prevent the problem reoccurring in the
future. Thanks to Vegard Nossum for writing the test.

Signed-off-by: Allan Xavier <allan.x.xavier@oracle.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-03 11:16:20 -08:00
Sebastian Schuberth
b8686c661d contrib: git-remote-{bzr,hg} placeholders don't need Python
It does not make sense for these placeholder scripts to depend on Python
just because the real scripts do. At the example of Git for Windows, we
would not even be able to see those warnings as it does not ship with
Python. So just use plain shell scripts instead.

Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-03 11:09:34 -08:00
Andreas Heiduk
860cd699c2 Documentation: improve description for core.quotePath
Linking the description for pathname quoting to the configuration
variable "core.quotePath" removes inconstistent and incomplete
sections while also giving two hints how to deal with it: Either with
"-c core.quotePath=false" or with "-z".

Signed-off-by: Andreas Heiduk <asheiduk@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-02 11:40:51 -08:00
Junio C Hamano
12426e114b diff: do not short-cut CHECK_SIZE_ONLY check in diff_populate_filespec()
Callers of diff_populate_filespec() can choose to ask only for the
size of the blob without grabbing the blob data, and the function,
after running lstat() when the filespec points at a working tree
file, returns by copying the value in size field of the stat
structure into the size field of the filespec when this is the case.

However, this short-cut cannot be taken if the contents from the
path needs to go through convert_to_git(), whose resulting real blob
data may be different from what is in the working tree file.

As "git diff --quiet" compares the .size fields of filespec
structures to skip content comparison, this bug manifests as a
false "there are differences" for a file that needs eol conversion,
for example.

Reported-by: Mike Crowe <mac@mcrowe.com>
Helped-by: Torsten Bögershausen <tboegi@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-02 10:48:06 -08:00
Jeff King
c852bd54bd add--interactive: fix missing file prompt for patch mode with "-i"
When invoked as "git add -i", each menu interactive menu
option prompts the user to select a list of files. This
includes the "patch" option, which gets the list before
starting the hunk-selection loop.

As "git add -p", it behaves differently, and jumps straight
to the hunk selection loop.

Since 0539d5e6d (i18n: add--interactive: mark patch prompt
for translation, 2016-12-14), the "add -i" case mistakenly
jumps to straight to the hunk-selection loop. Prior to that
commit the distinction between the two cases was managed by
the $patch_mode variable. That commit used $patch_mode for
something else, and moved the old meaning to the "$cmd"
variable.  But it forgot to update the $patch_mode check
inside patch_update_cmd() which controls the file-list
behavior.

The simplest fix would be to change that line to check $cmd.
But while we're here, let's use a less obscure name for this
flag: $patch_mode_only, a boolean which tells whether we are
in full-interactive mode or only in patch-mode.

Reported-by: Henrik Grubbström <grubba@grubba.org>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-02 10:10:38 -08:00
René Scharfe
6d167fd7cc pretty: use fmt_output_email_subject()
Add the email-style subject prefix (e.g. "Subject: [PATCH] ") directly
when it's needed instead of letting log_write_email_headers() prepare
it in a static buffer in advance.  This simplifies storage ownership and
code flow.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-01 15:09:17 -08:00
Eric Wong
bcd886d897 README: create HTTP/HTTPS links from URLs in Markdown
Markdown supports automatic links by surrounding URLs with
angle brackets, as documented in
<https://daringfireball.net/projects/markdown/syntax#autolink>

While we're at it, update URLs to avoid redirecting clients for
git-scm.com (by using HTTPS) and public-inbox.org (by adding a
trailing slash).

Signed-off-by: Eric Wong <e@80x24.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-01 14:45:45 -08:00
René Scharfe
8ffc8dc6ba log-tree: factor out fmt_output_email_subject()
Use a strbuf to store the subject prefix string and move its
construction into its own function.  This gets rid of two arbitrary
length limits and allows the string to be added by callers directly.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-01 09:54:42 -08:00
Thomas Gummerer
9e140909f6 stash: allow pathspecs in the no verb form
Now that stash_push is used in the no verb form of stash, allow
specifying the command line for this form as well.  Always use -- to
disambiguate pathspecs from other non-option arguments.

Also make git stash -p an alias for git stash push -p.  This allows
users to use git stash -p <pathspec>.

Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-28 14:21:10 -08:00
Thomas Gummerer
1ada5020b3 stash: use stash_push for no verb form
Now that we have stash_push, which accepts pathspec arguments, use
it instead of stash_save in git stash without any additional verbs.

Previously we allowed git stash -- -message, which is no longer allowed
after this patch.  Messages starting with a hyphen was allowed since
3c2eb80f, ("stash: simplify defaulting to "save" and reject unknown
options").  However it was never the intent to allow that, but rather it
was allowed accidentally.

Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-28 14:21:10 -08:00
Thomas Gummerer
df6bba0937 stash: teach 'push' (and 'create_stash') to honor pathspec
While working on a repository, it's often helpful to stash the changes
of a single or multiple files, and leave others alone.  Unfortunately
git currently offers no such option.  git stash -p can be used to work
around this, but it's often impractical when there are a lot of changes
over multiple files.

Allow 'git stash push' to take pathspec to specify which paths to stash.

Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-28 14:21:05 -08:00
Stefan Beller
d1b3b81aab submodule init: warn about falling back to a local path
When a submodule is initialized, the config variable 'submodule.<name>.url'
is set depending on the value of the same variable in the .gitmodules
file. When the URL indicates to be relative, then the url is computed
relative to its default remote. The default remote cannot be determined
accurately in all cases, such that it falls back to 'origin'.

The 'origin' remote may not exist, though. In that case we give up looking
for a suitable remote and we'll just assume it to be a local relative path.

This can be confusing to users as there is a lot of guessing involved,
which is not obvious to the user.

So in the corner case of assuming a local autoritative truth, warn the
user to lessen the confusion.

This behavior was introduced in 4d6893200 (submodule add: allow relative
repository path even when no url is set, 2011-06-06), which shared the
code with submodule-init and then ported to C in 3604242f08 (submodule:
port init from shell to C, 2016-04-15).

In case of submodule-add, this behavior makes sense in some use cases[1],
however for submodule-init there does not seem to be an immediate obvious
use case to fall back to a local submodule. However there might be, so
warn instead of die here.

While adding the warning, also clarify the behavior of relative URLs in
the documentation.

[1] e.g. http://stackoverflow.com/questions/8721984/git-ignore-files-for-public-repository-but-not-for-private
"store a secret locally in a submodule, with no intention to publish it"

Reported-by: Shawn Pearce <spearce@spearce.org>
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-28 13:46:22 -08:00
Ramsay Jones
b2d593a779 wrapper.c: remove unused gitmkstemps() function
The last call to the mkstemps() function was removed in commit 659488326
("wrapper.c: delete dead function git_mkstemps()", 22-04-2016). In order
to support platforms without mkstemps(), this functionality was provided,
along with a Makefile build variable (NO_MKSTEMPS), by the gitmkstemps()
function. Remove the dead code, along with the defunct build machinery.

Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-28 11:54:21 -08:00
Ramsay Jones
34de5e4bb0 wrapper.c: remove unused git_mkstemp() function
The last caller of git_mkstemp() was removed in commit 6fec0a89
("verify_signed_buffer: use tempfile object", 16-06-2016). Since
the introduction of the 'tempfile' APIs, along with git_mkstemp_mode,
it is unlikely that new callers will materialize. Remove the dead
code.

Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-28 11:54:14 -08:00
Jonathan Tan
8e27391a5f http: attempt updating base URL only if no error
http.c supports HTTP redirects of the form

  http://foo/info/refs?service=git-upload-pack
  -> http://anything
  -> http://bar/info/refs?service=git-upload-pack

(that is to say, as long as the Git part of the path and the query
string is preserved in the final redirect destination, the intermediate
steps can have any URL). However, if one of the intermediate steps
results in an HTTP exception, a confusing "unable to update url base
from redirection" message is printed instead of a Curl error message
with the HTTP exception code.

This was introduced by 2 commits. Commit c93c92f ("http: update base
URLs when we see redirects", 2013-09-28) introduced a best-effort
optimization that required checking if only the "base" part of the URL
differed between the initial request and the final redirect destination,
but it performed the check before any HTTP status checking was done. If
something went wrong, the normal code path was still followed, so this
did not cause any confusing error messages until commit 6628eb4 ("http:
always update the base URL for redirects", 2016-12-06), which taught
http to die if the non-"base" part of the URL differed.

Therefore, teach http to check the HTTP status before attempting to
check if only the "base" part of the URL differed. This commit teaches
http_request_reauth to return early without updating options->base_url
upon an error; the only invoker of this function that passes a non-NULL
"options" is remote-curl.c (through "http_get_strbuf"), which only uses
options->base_url for an informational message in the situations that
this commit cares about (that is, when the return value is not HTTP_OK).

The included test checks that the redirect scheme at the beginning of
this commit message works, and that returning a 502 in the middle of the
redirect scheme produces the correct result. Note that this is different
from the test in commit 6628eb4 ("http: always update the base URL for
redirects", 2016-12-06) in that this commit tests that a Git-shaped URL
(http://.../info/refs?service=git-upload-pack) works, whereas commit
6628eb4 tests that a non-Git-shaped URL
(http://.../info/refs/foo?service=git-upload-pack) does not work (even
though Git is processing that URL) and is an error that is fatal, not
silently swallowed.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-28 11:35:53 -08:00