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Jeff King 97be04077f cat-file: only split on whitespace when %(rest) is used
Commit c334b87b (cat-file: split --batch input lines on whitespace,
2013-07-11) taught `cat-file --batch-check` to split input lines on
the first whitespace, and stash everything after the first token
into the %(rest) output format element.  It claimed:

   Object names cannot contain spaces, so any input with
   spaces would have resulted in a "missing" line.

But that is not correct.  Refs, object sha1s, and various peeling
suffixes cannot contain spaces, but some object names can. In
particular:

  1. Tree paths like "[<tree>]:path with whitespace"

  2. Reflog specifications like "@{2 days ago}"

  3. Commit searches like "rev^{/grep me}" or ":/grep me"

To remain backwards compatible, we cannot split on whitespace by
default, hence we will ship 1.8.4 with the commit reverted.

Resurrect its attempt but in a weaker form; only do the splitting
when "%(rest)" is used in the output format. Since that element did
not exist at all before c334b87, old scripts cannot be affected.

The existence of object names with spaces does mean that you
cannot reliably do:

  echo ":path with space and other data" |
  git cat-file --batch-check="%(objectname) %(rest)"

as it would split the path and feed only ":path" to get_sha1. But
that command is nonsensical. If you wanted to see "and other data"
in "%(rest)", git cannot possibly know where the filename ends and
the "rest" begins.

It might be more robust to have something like "-z" to separate the
input elements. But this patch is still a reasonable step before
having that.  It makes the easy cases easy; people who do not care
about %(rest) do not have to consider it, and the %(rest) code
handles the spaces and newlines of "rev-list --objects" correctly.

Hard cases remain hard but possible (if you might get whitespace in
your input, you do not get to use %(rest) and must split and join
the output yourself using more flexible tools). And most
importantly, it does not preclude us from having different splitting
rules later if a "-z" (or similar) option is added.  So we can make
the hard cases easier later, if we choose to.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-08-05 09:30:48 -07:00
..
add.c Merge branch 'jc/add-ignore-removal' 2013-04-26 15:28:09 -07:00
annotate.c
apply.c Merge branch 'jc/apply-ws-fix-tab-in-indent' into maint 2013-04-22 11:26:56 -07:00
archive.c pkt-line: provide a LARGE_PACKET_MAX static buffer 2013-02-20 13:42:22 -08:00
bisect--helper.c i18n: bisect--helper: mark parseopt strings for translation 2012-08-20 12:23:15 -07:00
blame.c Merge branch 'nd/pretty-formats' 2013-04-23 11:22:48 -07:00
branch.c branch: colour upstream branches 2013-04-15 11:04:44 -07:00
bundle.c
cat-file.c cat-file: only split on whitespace when %(rest) is used 2013-08-05 09:30:48 -07:00
check-attr.c Merge branch 'maint' 2012-09-17 15:59:34 -07:00
check-ignore.c dir.c: git-status --ignored: don't scan the work tree twice 2013-04-15 12:36:42 -07:00
check-ref-format.c
checkout-index.c Use imperative form in help usage to describe an action 2012-08-22 12:02:28 -07:00
checkout.c Merge branch 'nd/checkout-keep-sparse' 2013-04-22 11:11:40 -07:00
clean.c Merge branch 'as/check-ignore' 2013-01-23 21:19:10 -08:00
clone.c Merge branch 'jk/check-corrupt-objects-carefully' 2013-04-28 11:57:54 -07:00
column.c i18n: column: mark parseopt strings for translation 2012-08-20 12:23:16 -07:00
commit-tree.c commit-tree: document -S option consistently 2013-03-25 15:01:22 -07:00
commit.c pretty: save commit encoding from logmsg_reencode if the caller needs it 2013-04-18 16:28:27 -07:00
config.c Merge branch 'cn/config-missing-path' into maint 2012-11-25 18:35:46 -08:00
count-objects.c count-objects: add -H option to humanize sizes 2013-04-10 13:27:26 -07:00
credential.c
describe.c Merge branch 'jc/describe' into maint 2013-04-03 09:25:52 -07:00
diff-files.c
diff-index.c update-index/diff-index: use core.preloadindex to improve performance 2012-11-02 11:38:29 -04:00
diff-tree.c
diff.c Merge branch 'kb/preload-index-more' 2012-11-20 10:32:10 -08:00
fast-export.c fast-export: add --signed-tags=warn-strip mode 2013-04-15 09:02:25 -07:00
fetch-pack.c Merge branch 'jk/pkt-line-cleanup' 2013-04-01 08:59:37 -07:00
fetch.c Merge branch 'jk/gc-auto-after-fetch' 2013-02-01 12:40:16 -08:00
fmt-merge-msg.c Merge branch 'rt/commentchar-fmt-merge-msg' 2013-04-15 12:40:56 -07:00
for-each-ref.c Merge branch 'nd/i18n-parseopt-help' 2012-09-07 11:09:09 -07:00
fsck.c i18n: fsck: mark parseopt strings for translation 2012-08-20 12:23:17 -07:00
gc.c silence git gc --auto --quiet output 2012-09-27 17:57:26 -07:00
grep.c Sync with 1.8.1 maintenance track 2013-04-03 09:18:01 -07:00
hash-object.c i18n: hash-object: mark parseopt strings for translation 2012-08-20 12:23:17 -07:00
help.c help: mark common_guides[] as translatable 2013-04-12 09:49:00 -07:00
index-pack.c Merge branch 'nd/index-pack-threaded-fixes' into maint 2013-04-04 13:00:41 -07:00
init-db.c i18n: init-db: mark parseopt strings for translation 2012-08-20 12:23:17 -07:00
log.c Merge branch 'rr/shortlog-doc' 2013-04-26 15:28:39 -07:00
ls-files.c dir.c: replace is_path_excluded with now equivalent is_excluded API 2013-04-15 12:34:01 -07:00
ls-remote.c ls-remote: document the '--get-url' option 2012-09-07 10:58:35 -07:00
ls-tree.c pathspec: save the non-wildcard length part 2012-11-19 13:08:28 -08:00
mailinfo.c Merge branch 'jc/same-encoding' into maint 2012-12-07 14:10:56 -08:00
mailsplit.c mailsplit: sort maildir filenames more cleverly 2013-03-02 22:52:44 -08:00
merge-base.c Merge branch 'jc/merge-bases' 2012-09-11 11:36:05 -07:00
merge-file.c i18n: merge-file: mark parseopt strings for translation 2012-08-20 12:23:18 -07:00
merge-index.c Which merge_file() function do you mean? 2012-12-09 23:05:27 -08:00
merge-ours.c
merge-recursive.c
merge-tree.c merge-tree: handle directory/empty conflict correctly 2013-05-06 22:17:00 -07:00
merge.c Merge branch 'jc/merge-tag-object' into maint 2013-04-24 16:14:06 -07:00
mktag.c
mktree.c i18n: mktree: mark parseopt strings for translation 2012-08-20 12:23:18 -07:00
mv.c i18n: mv: mark parseopt strings for translation 2012-08-20 12:23:18 -07:00
name-rev.c i18n: name-rev: mark parseopt strings for translation 2012-08-20 12:23:18 -07:00
notes.c Allow custom "comment char" 2013-01-16 12:48:22 -08:00
pack-objects.c Merge branch 'jk/peel-ref' 2012-10-25 06:42:27 -04:00
pack-redundant.c Fix sizeof usage in get_permutations 2012-12-13 11:13:44 -08:00
pack-refs.c i18n: pack-refs: mark parseopt strings for translation 2012-08-20 12:23:19 -07:00
patch-id.c
prune-packed.c i18n: prune-packed: mark parseopt strings for translation 2012-08-20 12:23:19 -07:00
prune.c Merge branch 'jk/fully-peeled-packed-ref' into maint-1.8.1 2013-04-03 08:43:03 -07:00
push.c remote.c: introduce a way to have different remotes for fetch/push 2013-04-02 10:41:42 -07:00
read-tree.c i18n: read-tree: mark parseopt strings for translation 2012-08-20 12:23:19 -07:00
receive-pack.c Merge branch 'jk/receive-pack-deadlocks-with-early-failure' 2013-04-23 11:16:50 -07:00
reflog.c Merge branch 'jc/maint-reflog-expire-clean-mark-typofix' into maint 2013-03-26 12:39:51 -07:00
remote-ext.c
remote-fd.c
remote.c remote: check for superfluous arguments in 'git remote add' 2013-04-24 13:12:51 -07:00
replace.c replace: parse revision argument for -d 2012-11-13 08:34:14 -05:00
rerere.c i18n: rerere: mark parseopt strings for translation 2012-08-20 12:23:19 -07:00
reset.c reset: update documentation to require only tree-ish with paths 2013-01-16 12:50:23 -08:00
rev-list.c Move print_commit_list to libgit.a 2012-10-29 03:08:30 -04:00
rev-parse.c Merge branch 'maint-1.7.11' into maint 2012-09-12 14:08:05 -07:00
revert.c cherry-pick/revert: make usage say '<commit-ish>...' 2013-04-24 09:48:01 -07:00
rm.c rm: do not complain about d/f conflicts during deletion 2013-04-04 12:28:47 -07:00
send-pack.c teach get_remote_heads to read from a memory buffer 2013-02-24 00:17:38 -08:00
shortlog.c builtin/shortlog.c: make usage string consistent with log 2013-04-22 08:00:54 -07:00
show-branch.c show-branch: use strbuf instead of static buffer 2013-04-06 18:57:15 -07:00
show-ref.c Merge branch 'jk/peel-ref' 2012-10-25 06:42:27 -04:00
stripspace.c Allow custom "comment char" 2013-01-16 12:48:22 -08:00
symbolic-ref.c git symbolic-ref --delete $symref 2012-10-21 12:17:38 -07:00
tag.c Merge branch 'ph/tag-force-no-warn-on-creation' into maint 2013-04-03 09:24:51 -07:00
tar-tree.c
unpack-file.c
unpack-objects.c
update-index.c update-index: allow "-h" to also display options 2013-02-23 23:49:33 -08:00
update-ref.c Use imperative form in help usage to describe an action 2012-08-22 12:02:28 -07:00
update-server-info.c i18n: update-server-info: mark parseopt strings for translation 2012-08-22 10:58:29 -07:00
upload-archive.c pkt-line: provide a LARGE_PACKET_MAX static buffer 2013-02-20 13:42:22 -08:00
var.c
verify-pack.c i18n: verify-pack: mark parseopt strings for translation 2012-08-22 10:58:29 -07:00
verify-tag.c gpg_interface: allow to request status return 2013-02-14 09:30:04 -08:00
write-tree.c i18n: write-tree: mark parseopt strings for translation 2012-08-22 10:58:29 -07:00