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Jeff King 060d4bb3d6 ident: don't write fallback username into git_default_name
The fmt_ident function gets a flag that tells us whether to
die if the name field is blank. If it is blank and we don't
die, then we fall back to the username from the passwd file.

The current code writes the value into git_default_name.
However, that's not necessarily correct, as the empty value
might have come from git_default_name, or it might have been
passed in.  This leads to two potential problems:

  1. If we are overriding an empty name in the passed-in
     value, then we may be overwriting a perfectly good name
     (from gitconfig or gecos) in the git_default_name
     buffer. Later calls to fmt_ident will end up using the
     fallback name, even though a better name was available.

  2. If we override an empty gecos name, we end up with the
     fallback name in git_default_name. A later call that
     uses IDENT_ERROR_ON_NO_NAME will see the fallback name
     and think that it is a good name, instead of producing
     an error. In other words, a blank gecos name would
     cause an error with this code:

       git_committer_info(IDENT_ERROR_ON_NO_NAME);

     but not this:

       git_committer_info(0);
       git_committer_info(IDENT_ERROR_ON_NO_NAME);

     because in the latter case, the first call has polluted
     the name buffer.

Instead, let's make the fallback a per-invocation variable.
We can just use the pw->pw_name string directly, since it
only needs to persist through the rest of the function (and
we don't do any other getpwent calls).

Note that while this solves (1) for future invocations of
fmt_indent, the current invocation might use the fallback
when it could in theory load a better value from
git_default_name. However, by not passing
IDENT_ERROR_ON_NO_NAME, the caller is indicating that it
does not care too much about the name, anyway, so we don't
bother; this is primarily about protecting future callers
who do care.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-05-22 09:08:14 -07:00
block-sha1
builtin format-patch: use default email for generating message ids 2012-05-22 09:07:53 -07:00
compat
contrib
Documentation Update draft release notes to 1.7.11 (11th batch) 2012-05-11 11:40:43 -07:00
git_remote_helpers
git-gui
gitk-git
gitweb
mergetools
perl
po
ppc
t Merge branch 'ef/checkout-empty' 2012-05-11 11:34:17 -07:00
templates
vcs-svn
xdiff Merge branch 'jc/diff-algo-cleanup' into maint 2012-05-11 11:19:27 -07:00
.gitattributes
.gitignore
.mailmap
abspath.c
aclocal.m4
advice.c
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 fmt_ident: drop IDENT_WARN_ON_NO_NAME code 2012-05-22 09:07:54 -07:00
check_bindir
check-builtins.sh
check-racy.c
color.c
color.h
column.c
column.h
combine-diff.c
command-list.txt
commit.c
commit.h Merge branch 'jk/maint-reflog-walk-count-vs-time' 2012-05-11 11:30:08 -07:00
config.c move identity config parsing to ident.c 2012-05-22 09:07:53 -07:00
config.mak.in
configure.ac
connect.c
connected.c
connected.h
convert.c
convert.h
copy.c
COPYING
credential-cache--daemon.c
credential-cache.c
credential-store.c
credential.c
credential.h
csum-file.c
csum-file.h
ctype.c
daemon.c
date.c
decorate.c
decorate.h
delta.h
diff-delta.c
diff-lib.c
diff-no-index.c
diff.c Merge branch 'jc/diff-algo-cleanup' into maint 2012-05-11 11:19:27 -07:00
diff.h Merge branch 'jc/diff-algo-cleanup' into maint 2012-05-11 11:19:27 -07:00
diffcore-break.c
diffcore-delta.c
diffcore-order.c
diffcore-pickaxe.c
diffcore-rename.c
diffcore.h
dir.c Merge branch 'rs/maint-dir-strbuf' into rs/dir-strbuf 2012-05-08 09:43:40 -07:00
dir.h
editor.c
entry.c
environment.c move git_default_* variables to ident.c 2012-05-22 09:07:53 -07:00
exec_cmd.c
exec_cmd.h
fast-import.c
fetch-pack.h
fixup-builtins
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
git-cvsexportcommit.perl
git-cvsimport.perl
git-cvsserver.perl
git-difftool--helper.sh
git-difftool.perl
git-filter-branch.sh
git-instaweb.sh
git-lost-found.sh
git-merge-octopus.sh
git-merge-one-file.sh
git-merge-resolve.sh
git-mergetool--lib.sh
git-mergetool.sh
git-p4.py
git-parse-remote.sh
git-pull.sh
git-quiltimport.sh
git-rebase--am.sh
git-rebase--interactive.sh Merge branch 'nl/rebase-i-cheat-sheet' into maint 2012-05-10 10:29:14 -07:00
git-rebase--merge.sh
git-rebase.sh
git-relink.perl
git-remote-testgit.py
git-repack.sh
git-request-pull.sh
git-send-email.perl
git-sh-i18n.sh
git-sh-setup.sh
git-stash.sh
git-submodule.sh
git-svn.perl Merge branch 'jk/maint-gitweb-test-use-sane-perl' into maint 2012-05-07 13:17:31 -07:00
GIT-VERSION-GEN Git 1.7.10.2 2012-05-11 11:25:28 -07:00
git-web--browse.sh
git.c
git.spec.in
gpg-interface.c
gpg-interface.h
graph.c
graph.h
grep.c Merge branch 'ah/maint-grep-double-init' into maint 2012-05-11 11:16:09 -07:00
grep.h
hash.c
hash.h
help.c
help.h
hex.c
http-backend.c
http-fetch.c
http-push.c http-push: do not access git_default_email directly 2012-05-22 09:07:52 -07:00
http-walker.c
http.c
http.h
ident.c ident: don't write fallback username into git_default_name 2012-05-22 09:08:14 -07:00
imap-send.c
INSTALL
kwset.c
kwset.h
levenshtein.c
levenshtein.h
LGPL-2.1
list-objects.c
list-objects.h
ll-merge.c
ll-merge.h
lockfile.c
log-tree.c Merge branch 'jk/maint-reflog-walk-count-vs-time' 2012-05-11 11:30:08 -07:00
log-tree.h
mailmap.c
mailmap.h
Makefile Merge branch 'jc/install-no-hardlinks' 2012-05-10 10:49:18 -07:00
match-trees.c
merge-file.c
merge-file.h
merge-recursive.c Merge branch 'jc/diff-algo-cleanup' into maint 2012-05-11 11:19:27 -07:00
merge-recursive.h
mergesort.c
mergesort.h
name-hash.c
notes-cache.c
notes-cache.h
notes-merge.c
notes-merge.h
notes.c
notes.h
object.c
object.h
pack-check.c
pack-refs.c
pack-refs.h
pack-revindex.c
pack-revindex.h
pack-write.c
pack.h
pager.c
parse-options-cb.c
parse-options.c
parse-options.h
patch-delta.c
patch-ids.c
patch-ids.h
path.c
pkt-line.c
pkt-line.h
preload-index.c
pretty.c Merge branch 'jk/maint-reflog-walk-count-vs-time' 2012-05-11 11:30:08 -07:00
progress.c
progress.h
prompt.c
prompt.h
quote.c
quote.h
reachable.c
reachable.h
read-cache.c
README
reflog-walk.c Merge branch 'jk/maint-reflog-walk-count-vs-time' 2012-05-11 11:30:08 -07:00
reflog-walk.h Merge branch 'jk/maint-reflog-walk-count-vs-time' 2012-05-11 11:30:08 -07:00
refs.c Merge branch 'mh/ref-api-lazy-loose' 2012-05-10 10:49:08 -07:00
refs.h
RelNotes Start preparing for 1.7.10.2 2012-05-07 13:24:32 -07:00
remote-curl.c Merge branch 'jk/maint-push-progress' into maint 2012-05-10 10:08:54 -07:00
remote.c
remote.h
replace_object.c
rerere.c
rerere.h
resolve-undo.c
resolve-undo.h
revision.c
revision.h
run-command.c
run-command.h
send-pack.h
sequencer.c Merge branch 'nh/empty-rebase' 2012-05-07 13:29:16 -07:00
sequencer.h
server-info.c
setup.c
sh-i18n--envsubst.c
sha1_file.c
sha1_name.c
sha1-array.c
sha1-array.h
sha1-lookup.c
sha1-lookup.h
shallow.c
shell.c
shortlog.h
show-index.c
sideband.c
sideband.h
sigchain.c
sigchain.h
strbuf.c
strbuf.h
streaming.c
streaming.h
string-list.c
string-list.h
submodule.c
submodule.h
symlinks.c
tag.c
tag.h
tar.h
test-chmtime.c
test-credential.c
test-ctype.c
test-date.c
test-delta.c
test-dump-cache-tree.c
test-genrandom.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-revision-walking.c
test-run-command.c
test-scrap-cache-tree.c
test-sha1.c
test-sha1.sh
test-sigchain.c
test-subprocess.c
test-svn-fe.c
thread-utils.c
thread-utils.h
trace.c
transport-helper.c
transport.c Merge branch 'ct/advise-push-default' into maint 2012-05-11 11:18:43 -07:00
transport.h
tree-diff.c
tree-walk.c
tree-walk.h
tree.c
tree.h
unimplemented.sh
unix-socket.c
unix-socket.h
unpack-trees.c
unpack-trees.h
upload-pack.c
url.c
url.h
usage.c
userdiff.c
userdiff.h
utf8.c
utf8.h
varint.c
varint.h
walker.c
walker.h
wrap-for-bin.sh
wrapper.c
write_or_die.c
ws.c
wt-status.c Merge branch 'jk/maint-status-porcelain-z-b' into HEAD 2012-05-08 04:55:35 -04:00
wt-status.h status: refactor colopts handling 2012-05-08 04:57:42 -04:00
xdiff-interface.c
xdiff-interface.h
zlib.c

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

	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.
It was originally written by Linus Torvalds with help of a group of
hackers around the net. It is currently maintained by Junio C Hamano.

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
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To subscribe to the list, send an email with just "subscribe git" in
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The messages titled "A note from the maintainer", "What's in
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