builtin/checkout.c: don't leak memory in check_tracking_name

remote_find_tracking() populates the query struct with an allocated
string in the dst member.  So, we do not need to xstrdup() the string,
since we can transfer ownership from the query struct (which will go
out of scope at the end of this function) to our callback struct, but
we must free the string if it will not be used so we will not leak
memory.

Let's do so.

Signed-off-by: Brandon Casey <drafnel@gmail.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Documentation/git-push.txt: explain better cases where --force is dangerous

The behavior of "git push --force" is rather clear when it updates only
one remote ref, but running it when pushing several branches can really
be dangerous. Warn the users a bit more and give them the alternative to
push only one branch.

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
t/t9802: explicitly name the upstream branch to use as a base

Prior to commit fa83a33b, the 'git checkout' DWIMery would create a
new local branch if the specified branch name did not exist and it
matched exactly one ref in the "remotes" namespace.  It searched
the "remotes" namespace for matching refs using a simple comparison
of the trailing portion of the remote ref names.  This approach
could sometimes produce false positives or negatives.

Since fa83a33b, the DWIMery more strictly excludes the remote name
from the ref comparison by iterating through the remotes that are
configured in the .gitconfig file.  This has the side-effect that
any refs that exist in the "remotes" namespace, but do not match
the destination side of any remote refspec, will not be used by
the DWIMery.

This change in behavior breaks the tests in t9802 which relied on
the old behavior of searching all refs in the remotes namespace,
since the git-p4 script does not configure any remotes in the
.gitconfig.  Let's work around this in these tests by explicitly
naming the upstream branch to base the new local branch on when
calling 'git checkout'.

Signed-off-by: Brandon Casey <drafnel@gmail.com>
Acked-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Documentation/git-merge.txt: weaken warning about uncommited changes

Commit 35d2fffd introduced 'git merge --abort' as a synonym to 'git reset
--merge', and added some failing tests in t7611-merge-abort.sh (search
'###' in this file) showing that 'git merge --abort' could not always
recover the pre-merge state.

Still, in many cases, 'git merge --abort' just works, and it is usually
considered that the ability to start a merge with uncommited changes is
an important property of Git.

Weaken the warning by discouraging only merge with /non-trivial/
uncommited changes.

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Documentation: Move "git diff <blob> <blob>"

The section describing "git diff <blob> <blob>" had been placed in a
position that disrupted the statement "This is synonymous to the
previous form".

Reorder to place this form after all the <commit>-using forms, and the
note applying to them. Also mention this form in the initial description
paragraph.

Signed-off-by: Kevin Bracey <kevin@bracey.fi>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
send-email: sanitize author when writing From line

sender is now sanitized, but we didn't sanitize
author when checking whether From: line is needed
in the message body.
As a result git started writing duplicate From lines
when author matched sender and has utf8 characters.

Reported-by: SZEDER Gábor <szeder@ira.uka.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: SZEDER Gábor <szeder@ira.uka.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
send-email: add test for duplicate utf8 name

Verify that author name is not duplicated if it matches
sender, even if it is in utf8.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'nd/make-wildmatch-default' into jch

* nd/make-wildmatch-default:
  Makefile: promote wildmatch to be the default fnmatch implementation
Merge branch 'js/test-ln-s-add' into jch

Many tests that check the behaviour of symbolic links stored in the
index or the tree objects do not have to be skipped on a filesystem
that lack symbolic link support.

* js/test-ln-s-add:
  t4011: remove SYMLINKS prerequisite
  t6035: use test_ln_s_add to remove SYMLINKS prerequisite
  t3509, t4023, t4114: use test_ln_s_add to remove SYMLINKS prerequisite
  t3100: use test_ln_s_add to remove SYMLINKS prerequisite
  t3030: use test_ln_s_add to remove SYMLINKS prerequisite
  t0000: use test_ln_s_add to remove SYMLINKS prerequisite
  tests: use test_ln_s_add to remove SYMLINKS prerequisite (trivial cases)
  tests: introduce test_ln_s_add
  t3010: modernize style
  test-chmtime: Fix exit code on Windows
Merge branch 'mz/rebase-tests' into jch

* mz/rebase-tests:
  rebase topology tests: fix commit names on case-insensitive file systems
  tests: move test for rebase messages from t3400 to t3406
  t3406: modernize style
  add tests for rebasing merged history
  add tests for rebasing root
  add tests for rebasing of empty commits
  add tests for rebasing with patch-equivalence present
  add simple tests of consistency across rebase types
Merge branch 'fc/makefile' into jch

Makefile simplification.

* fc/makefile:
  Makefile: use $^ to avoid listing prerequisites on the command line
  build: do not install git-remote-testgit
  build: generate and clean test scripts
Merge branch 'fc/show-non-empty-errors-in-test' into jch

* fc/show-non-empty-errors-in-test:
  test: test_must_be_empty helper
Merge branch 'nd/traces' into jch

* nd/traces:
  git.txt: document GIT_TRACE_PACKET
  core: use env variable instead of config var to turn on logging pack access
Merge branch 'rs/discard-index-discard-array' into jch

* rs/discard-index-discard-array:
  read-cache: free cache in discard_index
  read-cache: add simple performance test
Merge branch 'mm/color-auto-default' into jch

Flip the default for color.ui to 'auto', which is what many
tutorials recommend new users to do.

* mm/color-auto-default:
  make color.ui default to 'auto'
  config: refactor management of color.ui's default value
Merge branch 'rs/match-trees-refactor' into jch

Code cleanup.

* rs/match-trees-refactor:
  match-trees: factor out fill_tree_desc_strict
Merge branch 'rs/logical-vs-binary-or' into jch

Code cleanup.

* rs/logical-vs-binary-or:
  use logical OR (||) instead of binary OR (|) in logical context
Merge branch 'jk/commit-info-slab' into jch

Allow adding custom information to commit objects in order to
represent unbound number of flag bits etc.

* jk/commit-info-slab:
  commit-slab: introduce a macro to define a slab for new type
  commit-slab: avoid large realloc
  commit: allow associating auxiliary info on-demand
Merge branch 'jc/topo-author-date-sort' into jch

"git log" learned the "--author-date-order" option, with which the
output is topologically sorted and commits in parallel histories
are shown intermixed together based on the author timestamp.

* jc/topo-author-date-sort:
  log: --author-date-order
  sort-in-topological-order: use prio-queue
  prio-queue: priority queue of pointers to structs
  toposort: rename "lifo" field

# Conflicts:
# 	.gitignore
# 	Makefile
# 	revision.c
Merge branch 'cm/remote-mediawiki' into jch

* cm/remote-mediawiki:
  git-remote-mediawiki: display message when launched directly

# Conflicts:
# 	contrib/mw-to-git/git-remote-mediawiki.perl