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Karsten Blees c69dfd24db trace: add infrastructure to augment trace output with additional info
To be able to add a common prefix or suffix to all trace output (e.g.
a timestamp or file:line of the caller), factor out common setup and
cleanup tasks of the trace* functions.

When adding a common prefix, it makes sense that the output of each trace
call starts on a new line. Add '\n' in case the caller forgot.

Note that this explicitly limits trace output to line-by-line, it is no
longer possible to trace-print just part of a line. Until now, this was
just an implicit assumption (trace-printing part of a line worked, but
messed up the trace file if multiple threads or processes were involved).

Thread-safety / inter-process-safety is also the reason why we need to do
the prefixing and suffixing in memory rather than issuing multiple write()
calls. Write_or_whine_pipe() / xwrite() is atomic unless the size exceeds
MAX_IO_SIZE (8MB, see wrapper.c). In case of trace_strbuf, this costs an
additional string copy (which should be irrelevant for performance in light
of actual file IO).

While we're at it, rename trace_strbuf's 'buf' argument, which suggests
that the function is modifying the buffer. Trace_strbuf() currently is the
only trace API that can print arbitrary binary data (without barfing on
'%' or stopping at '\0'), so 'data' seems more appropriate.

Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-07-13 21:25:18 -07:00
Documentation sha1_file: change GIT_TRACE_PACK_ACCESS logging to use trace API 2014-07-13 21:25:18 -07:00
block-sha1
builtin trace: improve trace performance 2014-07-13 21:24:23 -07:00
compat Merge branch 'cb/byte-order' 2014-06-16 10:07:18 -07:00
contrib Merge branch 'jk/complete-merge-pull' 2014-06-16 12:17:53 -07:00
ewah
git-gui
gitk-git
gitweb
mergetools
perl Merge branch 'mm/pager-less-sans-S' 2014-06-06 11:02:59 -07:00
po
ppc
t Merge branch 'ib/test-selectively-run' 2014-06-16 12:18:56 -07:00
templates
vcs-svn
xdiff
.gitattributes
.gitignore Merge branch 'tb/unicode-6.3-zero-width' 2014-06-06 11:29:38 -07:00
.mailmap
COPYING
GIT-VERSION-GEN First batch for 2.1 2014-06-03 12:09:13 -07:00
INSTALL
LGPL-2.1
Makefile Merge branch 'tb/unicode-6.3-zero-width' 2014-06-06 11:29:38 -07:00
README
RelNotes First batch for 2.1 2014-06-03 12:09:13 -07:00
abspath.c
aclocal.m4
advice.c Merge branch 'jk/error-resolve-conflict-advice' 2014-06-16 12:18:47 -07:00
advice.h
alias.c
alloc.c
archive-tar.c
archive-zip.c
archive.c
archive.h
argv-array.c
argv-array.h
attr.c
attr.h
base85.c
bisect.c
bisect.h
blob.c
blob.h
branch.c
branch.h
builtin.h
bulk-checkin.c
bulk-checkin.h
bundle.c
bundle.h
cache-tree.c
cache-tree.h
cache.h trace: move trace declarations from cache.h to new trace.h 2014-06-17 09:37:47 -07:00
check-builtins.sh
check-racy.c
check_bindir
color.c
color.h
column.c
column.h
combine-diff.c Merge branch 'mk/show-s-no-extra-blank-line-for-merges' 2014-06-06 11:35:02 -07:00
command-list.txt
commit-slab.h
commit.c commit.c: rearrange xcalloc arguments 2014-05-27 14:00:43 -07:00
commit.h trace: improve trace performance 2014-07-13 21:24:23 -07:00
config.c Merge branch 'ow/config-mailmap-pathname' 2014-06-16 12:18:24 -07:00
config.mak.in
config.mak.uname Merge branch 'sk/msvc-dynlink-crt' 2014-06-03 12:06:46 -07:00
configure.ac Merge branch 'ks/tree-diff-nway' 2014-06-03 12:06:40 -07:00
connect.c
connect.h
connected.c
connected.h
convert.c
convert.h
copy.c
credential-cache--daemon.c
credential-cache.c
credential-store.c
credential.c
credential.h
csum-file.c
csum-file.h
ctype.c
daemon.c Merge branch 'jk/daemon-tolower' 2014-06-16 10:07:15 -07:00
date.c
decorate.c
decorate.h
delta.h
diff-delta.c
diff-lib.c Merge branch 'jk/diff-files-assume-unchanged' 2014-06-16 10:06:12 -07:00
diff-no-index.c
diff.c Merge branch 'bg/xcalloc-nmemb-then-size' 2014-06-16 12:17:50 -07:00
diff.h Merge branch 'ks/tree-diff-nway' 2014-06-03 12:06:40 -07:00
diffcore-break.c
diffcore-delta.c
diffcore-order.c
diffcore-pickaxe.c
diffcore-rename.c
diffcore.h
dir.c dir.c:trim_trailing_spaces(): fix for " \ " sequence 2014-06-02 15:48:48 -07:00
dir.h
editor.c
entry.c
environment.c Merge branch 'sh/enable-preloadindex' 2014-06-16 12:18:49 -07:00
exec_cmd.c
exec_cmd.h
fast-import.c
fetch-pack.c
fetch-pack.h
fmt-merge-msg.h
fsck.c
fsck.h
generate-cmdlist.sh
gettext.c
gettext.h
git-add--interactive.perl
git-am.sh
git-archimport.perl
git-bisect.sh
git-compat-util.h Merge branch 'sk/windows-unc-path' 2014-06-16 10:07:03 -07:00
git-cvsexportcommit.perl
git-cvsimport.perl
git-cvsserver.perl
git-difftool--helper.sh
git-difftool.perl
git-filter-branch.sh
git-instaweb.sh git-instaweb: add support for Apache 2.4 2014-05-27 12:57:19 -07:00
git-merge-octopus.sh
git-merge-one-file.sh
git-merge-resolve.sh
git-mergetool--lib.sh
git-mergetool.sh
git-p4.py git-p4: Do not include diff in spec file when just preparing p4 2014-05-27 12:35:15 -07:00
git-parse-remote.sh
git-pull.sh Sync with maint 2014-06-12 12:22:38 -07:00
git-quiltimport.sh
git-rebase--am.sh
git-rebase--interactive.sh Merge branch 'rr/rebase-autostash-fix' 2014-06-16 10:06:57 -07:00
git-rebase--merge.sh Merge branch 'ep/shell-command-substitution' 2014-06-03 12:06:45 -07:00
git-rebase.sh Merge branch 'rr/rebase-autostash-fix' 2014-06-16 10:06:57 -07:00
git-relink.perl
git-remote-testgit.sh Merge branch 'ep/shell-assign-and-export-vars' 2014-06-06 11:38:51 -07:00
git-request-pull.sh
git-send-email.perl
git-sh-i18n.sh
git-sh-setup.sh
git-stash.sh Merge branch 'ep/shell-assign-and-export-vars' 2014-06-06 11:38:51 -07:00
git-submodule.sh Merge branch 'sk/submodules-absolute-path-on-windows' 2014-06-06 11:26:38 -07:00
git-svn.perl
git-web--browse.sh
git.c Merge branch 'lr/git-run-setup-gently' 2014-06-03 12:06:43 -07:00
git.rc
git.spec.in
gpg-interface.c
gpg-interface.h
graph.c
graph.h
grep.c Merge branch 'as/grep-fullname-config' 2014-06-03 12:06:39 -07:00
grep.h
hashmap.c
hashmap.h
help.c
help.h
hex.c
http-backend.c
http-fetch.c
http-push.c http-push.c: rearrange xcalloc arguments 2014-05-27 14:02:45 -07:00
http-walker.c
http.c http: default text charset to iso-8859-1 2014-05-27 09:59:22 -07:00
http.h http: optionally extract charset parameter from content-type 2014-05-27 09:59:19 -07:00
ident.c
imap-send.c Merge branch 'bg/xcalloc-nmemb-then-size' 2014-06-16 12:17:50 -07:00
khash.h
kwset.c
kwset.h
levenshtein.c
levenshtein.h
line-log.c
line-log.h
line-range.c
line-range.h
list-objects.c
list-objects.h
ll-merge.c
ll-merge.h
lockfile.c
log-tree.c
log-tree.h
mailmap.c
mailmap.h
match-trees.c
merge-blobs.c
merge-blobs.h
merge-recursive.c
merge-recursive.h
merge.c
mergesort.c
mergesort.h
name-hash.c
notes-cache.c
notes-cache.h
notes-merge.c
notes-merge.h
notes-utils.c
notes-utils.h
notes.c notes.c: rearrange xcalloc arguments 2014-05-27 14:02:45 -07:00
notes.h
object.c
object.h
pack-bitmap-write.c
pack-bitmap.c
pack-bitmap.h
pack-check.c
pack-objects.c pack-objects: use free()+xcalloc() instead of xrealloc()+memset() 2014-06-02 13:51:22 -07:00
pack-objects.h
pack-revindex.c pack-revindex.c: rearrange xcalloc arguments 2014-05-27 14:02:45 -07:00
pack-revindex.h
pack-write.c
pack.h
pager.c Merge branch 'je/pager-do-not-recurse' 2014-06-06 11:17:00 -07:00
parse-options-cb.c
parse-options.c
parse-options.h Merge branch 'jk/squelch-compiler-warning-from-funny-error-macro' 2014-06-06 11:21:36 -07:00
patch-delta.c
patch-ids.c
patch-ids.h
path.c Windows: allow using UNC path for git repository 2014-06-10 13:30:04 -07:00
pathspec.c
pathspec.h
pkt-line.c trace: improve trace performance 2014-07-13 21:24:23 -07:00
pkt-line.h
preload-index.c
pretty.c Merge branch 'as/pretty-truncate' 2014-06-16 10:07:12 -07:00
prio-queue.c
prio-queue.h
progress.c
progress.h
prompt.c
prompt.h
quote.c
quote.h
reachable.c
reachable.h
read-cache.c Merge branch 'ym/fix-opportunistic-index-update-race' 2014-06-03 12:06:41 -07:00
reflog-walk.c reflog-walk.c: rearrange xcalloc arguments 2014-05-27 14:02:45 -07:00
reflog-walk.h
refs.c Merge branch 'dt/refs-check-refname-component-optim' 2014-06-16 12:18:52 -07:00
refs.h Merge branch 'jl/remote-rm-prune' 2014-06-16 12:17:58 -07:00
remote-curl.c remote-curl: reencode http error messages 2014-05-27 09:59:22 -07:00
remote-testsvn.c
remote.c remote.c: rearrange xcalloc arguments 2014-05-27 14:02:45 -07:00
remote.h
replace_object.c
rerere.c
rerere.h
resolve-undo.c
resolve-undo.h
revision.c Merge branch 'jc/shortlog-ref-exclude' 2014-06-09 11:30:13 -07:00
revision.h
run-command.c
run-command.h
send-pack.c
send-pack.h
sequencer.c
sequencer.h
server-info.c
setup.c Merge branch 'mw/symlinks' into maint 2014-05-28 15:45:57 -07:00
sh-i18n--envsubst.c
sha1-array.c
sha1-array.h
sha1-lookup.c
sha1-lookup.h
sha1_file.c sha1_file: change GIT_TRACE_PACK_ACCESS logging to use trace API 2014-07-13 21:25:18 -07:00
sha1_name.c
shallow.c trace: improve trace performance 2014-07-13 21:24:23 -07:00
shell.c
shortlog.h
show-index.c
sideband.c sideband.c: do not use ANSI control sequence on non-terminal 2014-06-02 11:02:27 -07:00
sideband.h
sigchain.c
sigchain.h
strbuf.c Merge branch 'jk/http-errors' 2014-06-16 12:18:36 -07:00
strbuf.h Merge branch 'jk/http-errors' 2014-06-16 12:18:36 -07:00
streaming.c
streaming.h
string-list.c
string-list.h string-list: spell all values out that are given to a string_list initializer 2014-06-06 13:49:19 -07:00
submodule.c
submodule.h
symlinks.c
tag.c
tag.h
tar.h
test-chmtime.c
test-ctype.c
test-date.c
test-delta.c
test-dump-cache-tree.c
test-genrandom.c
test-hashmap.c
test-index-version.c
test-line-buffer.c
test-match-trees.c
test-mergesort.c
test-mktemp.c
test-parse-options.c
test-path-utils.c
test-prio-queue.c
test-read-cache.c
test-regex.c
test-revision-walking.c
test-run-command.c
test-scrap-cache-tree.c
test-sha1.c
test-sha1.sh
test-sigchain.c
test-string-list.c
test-subprocess.c
test-svn-fe.c
test-urlmatch-normalization.c
test-wildmatch.c
thread-utils.c
thread-utils.h
trace.c trace: add infrastructure to augment trace output with additional info 2014-07-13 21:25:18 -07:00
trace.h trace: add infrastructure to augment trace output with additional info 2014-07-13 21:25:18 -07:00
transport-helper.c Merge branch 'fc/remote-helper-refmap' 2014-06-16 12:18:15 -07:00
transport.c
transport.h
tree-diff.c
tree-walk.c
tree-walk.h
tree.c
tree.h
unicode_width.h
unimplemented.sh
unix-socket.c
unix-socket.h
unpack-trees.c
unpack-trees.h
update_unicode.sh
upload-pack.c
url.c
url.h
urlmatch.c
urlmatch.h
usage.c
userdiff.c
userdiff.h
utf8.c Merge branch 'tb/unicode-6.3-zero-width' 2014-06-06 11:29:38 -07:00
utf8.h
varint.c
varint.h
version.c
version.h
versioncmp.c
walker.c
walker.h
wildmatch.c
wildmatch.h
wrap-for-bin.sh
wrapper.c
write_or_die.c
ws.c
wt-status.c Merge branch 'jl/status-added-submodule-is-never-ignored' 2014-06-16 10:07:19 -07:00
wt-status.h
xdiff-interface.c
xdiff-interface.h
zlib.c

README

////////////////////////////////////////////////////////////////

	Git - the stupid content tracker

////////////////////////////////////////////////////////////////

"git" can mean anything, depending on your mood.

 - random three-letter combination that is pronounceable, and not
   actually used by any common UNIX command.  The fact that it is a
   mispronunciation of "get" may or may not be relevant.
 - stupid. contemptible and despicable. simple. Take your pick from the
   dictionary of slang.
 - "global information tracker": you're in a good mood, and it actually
   works for you. Angels sing, and a light suddenly fills the room.
 - "goddamn idiotic truckload of sh*t": when it breaks

Git is a fast, scalable, distributed revision control system with an
unusually rich command set that provides both high-level operations
and full access to internals.

Git is an Open Source project covered by the GNU General Public
License version 2 (some parts of it are under different licenses,
compatible with the GPLv2). It was originally written by Linus
Torvalds with help of a group of hackers around the net.

Please read the file INSTALL for installation instructions.

See Documentation/gittutorial.txt to get started, then see
Documentation/everyday.txt for a useful minimum set of commands, and
Documentation/git-commandname.txt for documentation of each command.
If git has been correctly installed, then the tutorial can also be
read with "man gittutorial" or "git help tutorial", and the
documentation of each command with "man git-commandname" or "git help
commandname".

CVS users may also want to read Documentation/gitcvs-migration.txt
("man gitcvs-migration" or "git help cvs-migration" if git is
installed).

Many Git online resources are accessible from http://git-scm.com/
including full documentation and Git related tools.

The user discussion and development of Git take place on the Git
mailing list -- everyone is welcome to post bug reports, feature
requests, comments and patches to git@vger.kernel.org (read
Documentation/SubmittingPatches for instructions on patch submission).
To subscribe to the list, send an email with just "subscribe git" in
the body to majordomo@vger.kernel.org. The mailing list archives are
available at http://news.gmane.org/gmane.comp.version-control.git/,
http://marc.info/?l=git and other archival sites.

The maintainer frequently sends the "What's cooking" reports that
list the current status of various development topics to the mailing
list.  The discussion following them give a good reference for
project status, development direction and remaining tasks.