cvsimport: start adding cvsps 3.x support

The new cvsps 3.x series lacks support of some options cvsps 2.x
series had and used by cvsimport-2; add a replacement program from
the author of cvsps 3.x and allow users to choose it by setting the
GIT_CVSPS_VERSION environment variable to 3.  We would later add
support to auto-detect the version of installed cvsps to this code
when the environment variable is not set.

Note that in this step, cvsimport-3 that relies on cvsps 3.x does
not have any test coverage.  As cvsimport-3 supports most of the
command line options cvsimport-2 does, we should be able to tweak
some of the t96xx tests and run them with GIT_CVSPS_VERSION set to
both 2 and 3, but that is a topic of later patches that should come
on top.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
cvsimport: make tests reusable for cvsimport-3

This way, a dual-use test can be dot-sourced into a new test script
after defining GIT_CVSPS_VERSION=3 to test that the new cvsimport
with cvsps (3.x) works on simple test histories that old cvsimport
can grok correctly.

Also allow CVSPS2_PATH and CVSPS3_PATH to be defined as "NoThanks"
to cause the tests in t96?? series to be skipped.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
cvsimport-3: add a sample test

This is primarily for illustration to show how the support
introduced by the previous step can be used.

Some parts of t9600 needs to be made conditional to the value of
TEST_CVSPS_VERSION to avoid passing options the new cvsimport does
not need or understand, before this can become usable as a real
test.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
t9600: further prepare for sharing

When t9650, which dot-sources this script, really becomes ready to
test the new cvsimport, we no longer depend on having PERL to run
this test through it.  Move the PERL dependency to lib-cvs.sh
instead.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
t9600: adjust for new cvsimport

The rewritten cvsimport does not skip the latest 10 minutes worth of
CVS commits by default, so there is no need to pass the "-a" option;
it will barf if it sees "-a".

Also it will do the merge itself, so there is no need to merge
"origin" ourselves, either.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'jc/cvsimport-upgrade' into pu

The most important part of this series is the addition of the new
cvsimport by Eric Raymond that works with cvsps 3.x.  Given some
distros have inertia to be conservative, Git with cvsimport that
does not work with both 3.x will block adoption of cvsps 3.x by
them, and shipping Git with cvsimport that does not work with cvsps
2.x will block such a version of Git, so we'll do the proven "both
old and new are available, but we aim to deprecate and remove the
old one in due time" strategy that we used successfully in the
past.

* jc/cvsimport-upgrade:
  t9600: adjust for new cvsimport
  t9600: further prepare for sharing
  cvsimport-3: add a sample test
  cvsimport: make tests reusable for cvsimport-3
  cvsimport: start adding cvsps 3.x support
  cvsimport: introduce a version-switch wrapper
  cvsimport: allow setting a custom cvsps (2.x) program name
  Makefile: add description on PERL/PYTHON_PATH
### Expecting a reroll
Merge branch 'dg/subtree-fixes' into pu

contrib/subtree updates.

Rerolled?

* dg/subtree-fixes:
  contrib/subtree: mkdir the manual directory if needed
  contrib/subtree: honor $(DESTDIR)
  contrib/subtree: fix synopsis and command help
  contrib/subtree: better error handling for "add"
  contrib/subtree: add --unannotate option
  contrib/subtree: use %B for split Subject/Body
  t7900: remove test number comments
Merge branch 'mz/reset-misc' into pu

Various 'reset' optimizations and clean-ups, followed by a change
to allow "git reset" to work even on an unborn branch.

* mz/reset-misc: (22 commits)
  reset [--mixed]: use diff-based reset whether or not pathspec was given
  [SQUASH???] script portability fixes
  reset: allow reset on unborn branch
  reset $sha1 $pathspec: require $sha1 only to be treeish
  reset [--mixed] --quiet: don't refresh index
  reset.c: finish entire cmd_reset() whether or not pathspec is given
  reset [--mixed]: don't write index file twice
  reset.c: move lock, write and commit out of update_index_refresh()
  reset.c: move update_index_refresh() call out of read_from_tree()
  reset: avoid redundant error message
  reset --keep: only write index file once
  reset.c: replace switch by if-else
  reset.c: share call to die_if_unmerged_cache()
  [SQUASH???] style fixes
  reset.c: extract function for updating {ORIG,}HEAD
  reset.c: remove unnecessary variable 'i'
  [SQUASH???] style fix
  reset.c: extract function for parsing arguments
  reset: don't allow "git reset -- $pathspec" in bare repo
  reset.c: pass pathspec around instead of (prefix, argv) pair
  ...
Merge branch 'mb/gitweb-highlight-link-target' into pu

Expecting a reroll.
$gmane/211935

* mb/gitweb-highlight-link-target:
  Highlight the link target line in Gitweb using CSS
Merge branch 'bc/append-signed-off-by' into pu

Expecting a reroll.
$gmane/212507

* bc/append-signed-off-by:
  t4014: do not use echo -n
  Unify appending signoff in format-patch, commit and sequencer
  format-patch: update append_signoff prototype
  format-patch: stricter S-o-b detection
  t4014: more tests about appending s-o-b lines
  sequencer.c: teach append_signoff to avoid adding a duplicate newline
  sequencer.c: teach append_signoff how to detect duplicate s-o-b
  sequencer.c: always separate "(cherry picked from" from commit body
  sequencer.c: recognize "(cherry picked from ..." as part of s-o-b footer
  t/t3511: add some tests of 'cherry-pick -s' functionality
  t/test-lib-functions.sh: allow to specify the tag name to test_commit
  sequencer.c: remove broken support for rfc2822 continuation in footer

Conflicts:
	builtin/log.c
	t/t4014-format-patch.sh
### Stalled
Merge branch 'mb/remote-default-nn-origin' into pu

When the user does not specify what remote to interact with, we
often attempt to use 'origin'.  This can now be customized via a
configuration variable.

Expecting a reroll.
$gmane/210151

"The first remote becomes the default" bit is better done as a
separate step.

* mb/remote-default-nn-origin:
  Teach get_default_remote to respect remote.default.
  Test that plain "git fetch" uses remote.default when on a detached HEAD.
  Teach clone to set remote.default.
  Teach "git remote" about remote.default.
  Teach remote.c about the remote.default configuration setting.
  Rename remote.c's default_remote_name static variables.

Conflicts:
	builtin/remote.c
	t/t5505-remote.sh
Merge branch 'mp/complete-paths' into pu

The completion script used to let the default completer to suggest
pathnames, which gave too many irrelevant choices (e.g. "git add"
would not want to add an unmodified path).  Teach it to use a more
git-aware logic to enumerate only relevant ones.

Waiting for area-experts' help and review.

* mp/complete-paths:
  git-completion.bash: add support for path completion
Merge branch 'jc/xprm-generation' into pu

A toy to analyze how bad the clock skews are in histories of real
world projects.

Stalled mostly due to lack of responses.

* jc/xprm-generation:
  test-generation: compute generation numbers and clock skews
Merge branch 'jc/maint-name-rev' into pu

"git name-rev" names the given revision based on a ref that can be
reached in the smallest number of steps from the rev, but that is
not useful when the caller wants to know which tag is the oldest one
that contains the rev.  This teaches a new mode to the command that
uses the oldest ref among those which contain the rev.

I am not sure if this is worth it; for one thing, even with the help
from notes-cache, it seems to make the "describe --contains" even
slower. Also the command will be unusably slow for a user who does
not have a write access (hence unable to create or update the
notes-cache).

Stalled mostly due to lack of responses.

* jc/maint-name-rev:
  describe --contains: use "name-rev --algorithm=weight"
  name-rev --algorithm=weight: tests and documentation
  name-rev --algorithm=weight: cache the computed weight in notes
  name-rev --algorithm=weight: trivial optimization
  name-rev: --algorithm option
  name_rev: clarify the logic to assign a new tip-name to a commit
  name-rev: lose unnecessary typedef

Conflicts:
	builtin/name-rev.c
Merge branch 'jk/lua-hackery' into pu

Interesting exercise. When we do this for real, we probably would want
to wrap a commit to make it more like an "object" with methods like
"parents", etc.

* jk/lua-hackery:
  pretty: fix up one-off format_commit_message calls
  Minimum compilation fixup
  Makefile: make "lua" a bit more configurable
  add a "lua" pretty format
  add basic lua infrastructure
  pretty: make some commit-parsing helpers more public
Merge branch 'rc/maint-complete-git-p4' into pu

Comment from Pete will need to be addressed ($gmane/206172).

* rc/maint-complete-git-p4:
  Teach git-completion about git p4
Merge branch 'jl/submodule-deinit' into pu

There was no Porcelain way to say "I no longer am interested in
this submodule", once you express your interest in a submodule with
"submodule init".  "submodule deinit" is the way to do so.

Expecting a reroll.
$gmane/212884

* jl/submodule-deinit:
  submodule: add 'deinit' command

Conflicts:
	Documentation/git-submodule.txt
	git-submodule.sh
Merge branch 'jc/add-delete-default' into pu

"git add dir/" updated modified files and added new files, but does
not notice removed files, which may be "Huh?" to some users.  They
can of course use "git add -A dir/", but why should they?

Resurrected from graveyard, as I thought it was a worthwhile thing
to do in the longer term.

Stalled mostly due to lack of responses.

* jc/add-delete-default:
  git add: notice removal of tracked paths by default