Merge branch 'cc/interpret-trailers' into pu

* cc/interpret-trailers:
  Documentation: add documentation for 'git interpret-trailers'
  trailer: add tests for commands using env variables
  trailer: set author and committer env variables
  trailer: add tests for trailer command
  trailer: execute command from 'trailer.<name>.command'
  trailer: if no input file is passed, read from stdin
  trailer: add tests for "git interpret-trailers"
  trailer: add interpret-trailers command
  trailer: put all the processing together and print
  trailer: parse trailers from input file
  trailer: process command line trailer arguments
  trailer: read and process config information
  trailer: process trailers from file and arguments
  Add data structures and basic functions for commit trailers
Merge branch 'jl/submodule-recursive-checkout' into pu

* jl/submodule-recursive-checkout:
  Teach checkout to recursively checkout submodules
  submodule: teach unpack_trees() to update submodules
  submodule: teach unpack_trees() to repopulate submodules
  submodule: teach unpack_trees() to remove submodule contents
  submodule: prepare for recursive checkout of submodules
Merge branch 'hv/submodule-ignore-fix' into pu

Teach "git add" to be consistent with "git status" when changes to
submodules are set to be ignored, to avoid surprises after checking
with "git status" to see there isn't any change to be further added
and then see that "git add ." adds changes to them.

I think a reroll is coming, so this may need to be replaced, but I
needed some practice with heavy conflict resolution.  It conflicts
with two changes to "git add" that have been scheduled for Git 2.0
quite badly, and I think I got the resolution right this time.

* hv/submodule-ignore-fix:
  disable complete ignorance of submodules for index <-> HEAD diff
  always show committed submodules in summary after commit
  teach add -f option for ignored submodules
  fix 'git add' to skip submodules configured as ignored
Merge branch 'kb/fast-hashmap' into pu

Improvements to our hash table to get it to meet the needs of the
msysgit fscache project, with some nice performance improvements.

The tip one does not seem to have reached concensus (yet).

Will hold.

* kb/fast-hashmap:
  hashmap.h: make sure map entries are tightly packed
Merge branch 'rv/send-email-cache-generated-mid' into pu

* rv/send-email-cache-generated-mid:
  git-send-email: Cache generated message-ids, use them when prompting
  git-send-email: add optional 'choices' parameter to the ask sub
Merge branch 'jk/gitweb-utf8' into pu

Various fixes to gitweb.

Drew Northup volunteered to take a look into this ($gmane/226216)
but nothing seems to have happened since then.

* jk/gitweb-utf8:
  gitweb: Fix broken blob action parameters on blob/commitdiff pages
  gitweb: Don't append ';js=(0|1)' to external links
  gitweb: Make feed title valid utf8
  gitweb: Fix utf8 encoding for blob_plain, blobdiff_plain, commitdiff_plain, and patch
Merge branch 'jc/format-patch' into pu

A new option to send a single patch to the standard output to be
appended at the bottom of a message.  I personally have no need for
this, but it was easy enough to cobble together.  Tests, docs and
stripping out more MIMEy stuff are left as exercises to interested
parties.

* jc/format-patch:
  format-patch: --inline-single
  format-patch: rename "no_inline" field

# Conflicts:
# 	builtin/log.c
# 	log-tree.c
# 	pretty.c
Merge branch 'jc/show-branch' into pu

* jc/show-branch:
  show-branch: use commit slab to represent bitflags of arbitrary width
  show-branch.c: remove "all_mask"
  show-branch.c: abstract out "flags" operation
  show-branch.c: lift all_mask/all_revs to a global static
  show-branch.c: update comment style

# Conflicts:
# 	builtin/show-branch.c
Merge branch 'rj/read-default-config-in-show-ref-pack-refs' into pu

The changes themselves are probably good, but it is unclear what
basic setting needs to be read for which exact operation.

$gmane/228294

* rj/read-default-config-in-show-ref-pack-refs:
  ### DONTMERGE: needs better explanation on what config they need
  pack-refs.c: Add missing call to git_config()
  show-ref.c: Add missing call to git_config()
Merge branch 'tr/merge-recursive-index-only' into pu

Will hold.

* tr/merge-recursive-index-only:
  merge-recursive: -Xindex-only to leave worktree unchanged
  merge-recursive: internal flag to avoid touching the worktree
  merge-recursive: remove dead conditional in update_stages()
Merge branch 'tg/perf-lib-test-perf-cleanup' into pu

Add test_perf_cleanup shell function to the perf suite, that allows
the script writers to define a test with a clean-up action.

Will hold.

* tg/perf-lib-test-perf-cleanup:
  perf-lib: add test_perf_cleanup target
  perf-lib: split starting the test from the execution
Merge branch 'yt/shortened-rename' into pu

Attempts to give more weight on the fact that a filepair represents
a rename than showing substring of the actual path when diffstat
lines are not wide enough.

I am not sure if that is solving a right problem, though.

* yt/shortened-rename:
  SQUASH??? style fixes and s/omit/shorten/ where appropriate
  diff.c: keep arrow(=>) on show_stats()'s shortened filename part to make rename visible
Merge branch 'jt/commit-fixes-footer' into pu

There is an ongoing discussion around this topic; in general I am
fairly negative on a new feature that is too narrow and prefer a
more generic solution that can be tailored for specific needs, as
many people stated in the thread.

cc/interpret-trailers could be such a generic solution (although
there don't seem to be much concensus yet).

* jt/commit-fixes-footer:
  commit: Add -f, --fixes <commit> option to add Fixes: line
Merge branch 'jc/create-directories-microopt' into pu

Of unknown value until tested on non-Linux platforms (especially
Windows).

* jc/create-directories-microopt:
  checkout: most of the time we have good leading directories
Merge branch 'bl/blame-full-history' into pu

By disabling the tree-same optimization (which is consistent with
the default behaviour of "git log"-family of commands), make "git
blame" sometimes produce different result from the original code.

Because the "git blame" output can give result for each line from
only one lineage of the history, however, this can be only useful
when you are lucky---unlike "--full-history" of "git log"-family,
where we can show commits from both lineages of histories with an
equal weight.  See $gmane/240392 for more detailed discussion.

* bl/blame-full-history:
  blame: new option --prefer-first to better handle merged cherry-picks
Merge branch 'tr/remerge-diff' into pu

"log -p" output learns a new way to let users inspect a merge
commit by showing the differences between the automerged result
with conflicts the person who recorded the merge would have seen
and the final conflict resolution that was recorded in the merge.

RFC.

* tr/remerge-diff:
  log --remerge-diff: show what the conflict resolution changed
  merge-recursive: allow storing conflict hunks in index
  Fold all merge diff variants into an enum
  combine-diff: do not pass revs->dense_combined_merges redundantly
  log: add a merge base inspection option
  pretty: refactor add_merge_info() into parts

# Conflicts:
# 	combine-diff.c
# 	log-tree.c
### reported or known to be broken
Merge branch 'jk/makefile' into pu

Simplify the Makefile rules and macros that exist primarily for
quoting purposes, and make it easier to robustly express the
dependency rules.

* jk/makefile:
  FIXUP
  move LESS/LV pager environment to Makefile
  Makefile: teach scripts to include make variables
  FIXUP
  Makefile: auto-build C strings from make variables
  Makefile: drop *_SQ variables
  FIXUP
  Makefile: add c-quote helper function
  Makefile: introduce sq function for shell-quoting
  Makefile: always create files via make-var
  Makefile: store GIT-* sentinel files in MAKE/
  Makefile: prefer printf to echo for GIT-*
  Makefile: use tempfile/mv strategy for GIT-*
  Makefile: introduce make-var helper function
  Makefile: fix git-instaweb dependency on gitweb
  Makefile: drop USE_GETTEXT_SCHEME from GIT-CFLAGS
Merge branch 'mo/subtree-split-updates' into pu

Has been stalled for a while without much comments from anybody
interested.

* mo/subtree-split-updates:
  subtree: add --edit option
  subtree: allow --squash and --message with push
  subtree: support split --rejoin --squash

# Conflicts:
# 	contrib/subtree/git-subtree.sh
Merge branch 'jc/graph-post-root-gap' into pu

This was primarily a RFH ($gmane/239580).

* jc/graph-post-root-gap:
  WIP: document what we want at the end
  graph: remove unused code a bit
  graph: stuff the current commit into graph->columns[]