add test for 'git rebase --keep-empty'

Signed-off-by: Martin von Zweigbergk <martin.von.zweigbergk@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
check-docs: mention gitweb specially

Like gitk, gitweb is not listed in the usual Makefile
variables and must be fed to check-docs specially. Otherwise
check-docs thinks it is documented but removed.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
check-docs: update non-command documentation list

The check-docs target looks at Documentation/git*txt and
complains if any entry does not have a matching command.
Therefore we need to explicitly ignore any entries which are
not meant to describe a command (like gitattributes.txt).
This list has grown stale over time, so let's bring it up to
date.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
command-list: add git-sh-i18n

This is in the same category as git-sh-setup.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
command-list: mention git-credential-* helpers

These commands were never added to the command-list. Adding
them makes "make check-docs" run without complaint.
While we're at it, let's capitalize the first letter of
their one-line summaries to match the rest of the git
manpages.

The credential-cache--daemon command is somewhat special. It
is already ignored by check-docs because it contains a "--",
marking it as a non-interesting implementation detail. It
is, in fact, documented, but since the documentation
basically just redirects you to a more appropriate command
anyway, let's explicitly omit it so it is not mentioned in
git(1).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
check-docs: factor out command-list

The check-docs command list is composed from several
Makefile variables plus some special cases. Let's make the
meaning of the list more obvious and avoid repeating
ourselves by factoring it out.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
check-docs: list git-gui as a command

git-gui is already documented and mentioned in command-list,
but adding it to the Makefile makes sure it is so. We also
add its alias git-citool (which is also documented).

As a result, we can drop them from the special case
statement that avoids them being listed as "documented but
does not exist".

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
check-docs: drop git-help special-case

The check-docs target special-cases git-help to avoid
mentioning it as "documented but removed". This dates back
to the early implementation of git-help, when its code was
simply included inside git.c.

These days it is a full-fledged builtin (in builtin/help.c)
and does not need special-casing.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
check-docs: get documented command list from Makefile

The current code tries to get a list of documented commands
by doing "ls Documentation/git*txt" and culling a bunch of
special cases from the result. Looking for "git-*.txt" would
be more accurate, but would miss a few commands like
"gitweb" and "gitk".

Fortunately, Documentation/Makefile already knows what this
list is, so we can just ask it. Annoyingly, we still have to
post-process its output a little, since make will print
extra cruft like "GIT-VERSION-FILE is up to date" to stdout.

Now that our list is accurate, we can remove all of the ugly
special-cases.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
sh-setup: protect from exported IFS

Many scripted Porcelains rely on being able to split words at the
default $IFS characters, i.e. SP, HT and LF.  If the user exports a
non-default IFS to the environment, what they read from plumbing
commands such as ls-files that use HT to delimit fields may not be
split in the way we expect.

Protect outselves by resetting it, just like we do so against CDPATH
exported to the environment.

Noticed by Andrew Dranse <adranse@oanda.com>.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'sz/submodule-force-update' into jch

We may want a documentation update and a few tests on top.

Not urgent (non regression).

* sz/submodule-force-update:
  Make 'git submodule update --force' always check out submodules.
Merge branch 'mm/push-default-switch-warning' into jch

Will defer for another cycle.

* mm/push-default-switch-warning:
  push: start warning upcoming default change for push.default
Merge branch 'jk/no-more-pre-exec-callback' into jch

Will defer for 6 months until ancient "less" goes extinct.

* jk/no-more-pre-exec-callback:
  pager: drop "wait for output to run less" hack
Merge branch 'da/difftool-updates' into jch

"git difftool --dir-diff" learned to use symbolic links to prepare
temporary copy of the working tree when available.

Not urgent (non regression).

* da/difftool-updates:
  difftool: Disable --symlinks on cygwin
  difftool: Handle compare() returning -1
  difftool: Wrap long lines for readability
  difftool: Check all return codes from compare()
  difftool: Handle finding mergetools/ in a path with spaces
  difftool: Use symlinks when diffing against the worktree
  difftool: Call the temp directory "git-difftool"
  difftool: Move option values into a hash
  difftool: Eliminate global variables
  difftool: Simplify print_tool_help()
Merge branch 'jc/test-prereq' into jch

Teaches the test framework to probe rarely used prerequistes lazily,
and make use of it for detecting SYMLINKS, CASE_INSENSITIVE_FS and
NKD/NKC MacOS x gotcha.

Not urgent (non regression).

* jc/test-prereq:
  fixup! t3910: use the UTF8_NFD_TO_NFC test prereq
  t3910: use the UTF8_NFD_TO_NFC test prereq
  test-lib: provide UTF8 behaviour as a prerequisite
  t0050: use the SYMLINKS test prereq
  t0050: use the CASE_INSENSITIVE_FS test prereq
  test-lib: provide case insensitivity as a prerequisite
  test: allow prerequisite to be evaluated lazily
  test: rename $satisfied to $satisfied_prereq
Merge branch 'jc/maint-config-exit-status' into jch

The exit status code from "git config" was way overspecified while
being incorrect.  Update the implementation to give the documented
status for a case that was documented, and introduce a new code for
"all other errors".

Not urgent (non regression).

* jc/maint-config-exit-status:
  config: "git config baa" should exit with status 1

Conflicts:
	builtin/config.c
Merge branch 'jk/maint-null-in-trees' into jch

We do not want a link to 0{40} object stored anywhere in our objects.

Not urgent (non regression).

* jk/maint-null-in-trees:
  fsck: detect null sha1 in tree entries
  do not write null sha1s to on-disk index
  diff: do not use null sha1 as a sentinel value

Conflicts:
	diff-no-index.c
	read-cache.c
Merge branch 'jc/maint-t7406-rev-parse-max-count-huh' into jch

Test clean-up, with no behaviour change.
Not urgent (non regression).

* jc/maint-t7406-rev-parse-max-count-huh:
  t7406: fix misleading "rev-parse --max-count=1 HEAD"
Merge branch 'pg/maint-apply-remove-unused-variable' into jch

Remove unused field.
Not urgent (non regression).

* pg/maint-apply-remove-unused-variable:
  apply: delete unused deflate_origlen from patch struct
Merge branch 'nd/index-errno' into jch

Assignments to errno before calling system functions that used to
matter in the old code were left behind after the code structure
changed sufficiently to make them useless.

Not urgent (non regression).

* nd/index-errno:
  read_index_from: remove bogus errno assignments