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Taylor Blau 9d8db06eb4 grep.c: teach 'git grep --only-matching' 
Teach 'git grep --only-matching', a new option to only print the
matching part(s) of a line.

For instance, a line containing the following (taken from README.md:27):

  (`man gitcvs-migration` or `git help cvs-migration` if git is

Is printed as follows:

  $ git grep --line-number --column --only-matching -e git -- \
    README.md | grep ":27"
  README.md:27:7:git
  README.md:27:16:git
  README.md:27:38:git

The patch works mostly as one would expect, with the exception of a few
considerations that are worth mentioning here.

Like GNU grep, this patch ignores --only-matching when --invert (-v) is
given. There is a sensible answer here, but parity with the behavior of
other tools is preferred.

Because a line might contain more than one match, there are special
considerations pertaining to when to print line headers, newlines, and
how to increment the match column offset. The line header and newlines
are handled as a special case within the main loop to avoid polluting
the surrounding code with conditionals that have large blocks.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-07-09 14:15:28 -07:00
..
add.c Merge branch 'ma/lockfile-cleanup' 2018-05-30 14:04:05 +09:00
am.c Merge branch 'nd/use-opt-int-set-f' 2018-06-01 15:06:38 +09:00
annotate.c
apply.c apply: move lockfile into apply_state 2017-10-06 10:07:18 +09:00
archive.c correct error messages for NULL packet_read_line() 2018-02-08 12:37:30 -08:00
bisect--helper.c bisect: mention "view" as an alternative to "visualize" 2017-11-13 10:51:14 +09:00
blame.c Merge branch 'sb/blame-color' 2018-06-18 10:18:45 -07:00
branch.c Merge branch 'rd/doc-remote-tracking-with-hyphen' 2018-06-18 10:18:43 -07:00
bundle.c
cat-file.c Merge branch 'js/use-bug-macro' 2018-05-30 14:04:07 +09:00
check-attr.c config: don't include config.h by default 2017-06-15 12:56:22 -07:00
check-ignore.c check-ignore: fix mix of directories and other file types 2018-02-12 13:09:35 -08:00
check-mailmap.c config: don't include config.h by default 2017-06-15 12:56:22 -07:00
check-ref-format.c Merge branch 'jc/check-ref-format-oor' into maint 2017-11-15 12:04:57 +09:00
checkout-index.c parse-options: let OPT__FORCE take optional flags argument 2018-02-09 10:24:50 -08:00
checkout.c Merge branch 'ma/unpack-trees-free-msgs' 2018-05-30 21:51:29 +09:00
clean.c completion: use __gitcomp_builtin in _git_clean 2018-02-09 10:24:50 -08:00
clone.c Merge branch 'bw/ref-prefix-for-configured-refspec' 2018-05-30 21:51:26 +09:00
column.c column: fix off-by-one default width 2018-05-13 10:45:05 +09:00
commit-graph.c commit-graph: implement "--append" option 2018-04-11 10:43:02 +09:00
commit-tree.c sha1_file: convert assert_sha1_type to object_id 2018-03-14 09:23:49 -07:00
commit.c Merge branch 'bp/status-rename-config' 2018-05-30 14:04:07 +09:00
config.c Merge branch 'jk/config-blob-sans-repo' 2018-05-30 21:51:27 +09:00
count-objects.c packfile: convert has_sha1_pack to object_id 2018-05-02 13:59:49 +09:00
credential.c credential: handle invalid arguments earlier 2017-05-30 14:45:03 +09:00
describe.c Merge branch 'ma/lockfile-cleanup' 2018-05-30 14:04:05 +09:00
diff-files.c submodule: remove gitmodules_config 2017-08-03 13:11:02 -07:00
diff-index.c Merge branch 'ma/builtin-unleak' 2017-10-07 16:27:55 +09:00
diff-tree.c object: rename function 'typename' to 'type_name' 2018-02-14 13:10:05 -08:00
diff.c treewide: replace maybe_tree with accessor methods 2018-04-11 10:47:16 +09:00
difftool.c Merge branch 'nd/use-opt-int-set-f' 2018-06-01 15:06:38 +09:00
fast-export.c Merge branch 'bw/ref-prefix-for-configured-refspec' 2018-05-30 21:51:26 +09:00
fetch-pack.c Merge branch 'bw/protocol-v2' 2018-05-08 15:59:16 +09:00
fetch.c Merge branch 'nd/use-opt-int-set-f' 2018-06-01 15:06:38 +09:00
fmt-merge-msg.c sha1_file: convert read_sha1_file to struct object_id 2018-03-14 09:23:50 -07:00
for-each-ref.c provide --color option for all ref-filter users 2017-10-04 11:35:29 +09:00
fsck.c Merge branch 'bc/object-id' 2018-05-30 14:04:10 +09:00
gc.c Merge branch 'ma/lockfile-cleanup' 2018-05-30 14:04:05 +09:00
get-tar-commit-id.c distinguish error versus short read from read_in_full() 2017-09-27 15:45:24 +09:00
grep.c grep.c: teach 'git grep --only-matching' 2018-07-09 14:15:28 -07:00
hash-object.c exec_cmd: rename to use dash in file name 2018-04-11 18:11:00 +09:00
help.c Merge branch 'nd/command-list' 2018-06-01 15:06:37 +09:00
index-pack.c Merge branch 'jk/index-pack-maint' 2018-06-13 12:50:46 -07:00
init-db.c Merge branch 'rd/init-typo' 2018-06-01 15:06:40 +09:00
interpret-trailers.c Merge branch 'jk/trailers-parse' 2017-08-26 22:55:04 -07:00
log.c Use OPT_SET_INT_F() for cmdline option specification 2018-05-24 16:12:29 +09:00
ls-files.c Merge branch 'nd/use-opt-int-set-f' 2018-06-01 15:06:38 +09:00
ls-remote.c Merge branch 'bw/server-options' 2018-05-23 14:38:15 +09:00
ls-tree.c cache.h: add repository argument to oid_object_info 2018-04-26 10:54:27 +09:00
mailinfo.c
mailsplit.c mailinfo & mailsplit: check for EOF while parsing 2017-05-08 12:18:19 +09:00
merge-base.c Merge branch 'ma/reduce-heads-leakfix' 2017-11-15 12:14:32 +09:00
merge-file.c config: don't include config.h by default 2017-06-15 12:56:22 -07:00
merge-index.c
merge-ours.c Merge branch 'bw/diff-opt-impl-to-bitfields' 2017-11-09 14:31:27 +09:00
merge-recursive.c
merge-tree.c exec_cmd: rename to use dash in file name 2018-04-11 18:11:00 +09:00
merge.c Merge branch 'nd/use-opt-int-set-f' 2018-06-01 15:06:38 +09:00
mktag.c replace-object: add repository argument to lookup_replace_object 2018-04-12 11:38:56 +09:00
mktree.c cache.h: add repository argument to oid_object_info 2018-04-26 10:54:27 +09:00
mv.c Merge branch 'ma/lockfile-cleanup' 2018-05-30 14:04:05 +09:00
name-rev.c Convert find_unique_abbrev* to struct object_id 2018-03-14 09:23:48 -07:00
notes.c Merge branch 'nd/use-opt-int-set-f' 2018-06-01 15:06:38 +09:00
pack-objects.c Merge branch 'nd/use-opt-int-set-f' 2018-06-01 15:06:38 +09:00
pack-redundant.c pack-redundant: convert linked lists to use struct object_id 2018-05-02 13:59:50 +09:00
pack-refs.c refs: add repository argument to get_main_ref_store 2018-04-12 11:38:56 +09:00
patch-id.c config: don't include config.h by default 2017-06-15 12:56:22 -07:00
prune-packed.c packfile: convert has_sha1_pack to object_id 2018-05-02 13:59:49 +09:00
prune.c cache.h: add repository argument to oid_object_info 2018-04-26 10:54:27 +09:00
pull.c Merge branch 'rd/doc-remote-tracking-with-hyphen' 2018-06-18 10:18:43 -07:00
push.c transport: convert transport_push to take a struct refspec 2018-05-18 06:19:44 +09:00
read-tree.c lock_file: move static locks into functions 2018-05-10 14:55:40 +09:00
rebase--helper.c rebase -i: introduce --rebase-merges=[no-]rebase-cousins 2018-04-26 12:28:43 +09:00
receive-pack.c Merge branch 'bc/object-id' 2018-05-30 14:04:10 +09:00
reflog.c Merge branch 'ds/lazy-load-trees' 2018-05-23 14:38:13 +09:00
remote-ext.c consistently use "fallthrough" comments in switches 2017-09-22 12:49:57 +09:00
remote-fd.c remote-{ext,fd}: print usage message on invalid arguments 2017-05-30 14:45:04 +09:00
remote.c Merge branch 'bw/ref-prefix-for-configured-refspec' 2018-05-30 21:51:26 +09:00
repack.c repack: add --keep-pack option 2018-04-16 13:52:29 +09:00
replace.c Merge branch 'js/deprecate-grafts' 2018-05-23 14:38:17 +09:00
rerere.c avoid "write_in_full(fd, buf, len) != len" pattern 2017-09-14 15:17:59 +09:00
reset.c builtin/reset: convert use of EMPTY_TREE_SHA1_BIN 2018-05-02 13:59:52 +09:00
rev-list.c Merge branch 'bc/object-id' 2018-04-10 08:25:45 +09:00
rev-parse.c Merge branch 'en/rev-parse-invalid-range' 2018-06-01 15:06:39 +09:00
revert.c sequencer: improve config handling 2017-12-13 11:15:14 -08:00
rm.c Merge branch 'ma/lockfile-cleanup' 2018-05-30 14:04:05 +09:00
send-pack.c remote: convert match_push_refs to take a struct refspec 2018-05-18 06:19:44 +09:00
serve.c serve: introduce git-serve 2018-03-15 12:01:08 -07:00
shortlog.c Merge branch 'ps/contains-id-error-message' 2018-04-10 16:28:20 +09:00
show-branch.c Convert find_unique_abbrev* to struct object_id 2018-03-14 09:23:48 -07:00
show-ref.c Convert find_unique_abbrev* to struct object_id 2018-03-14 09:23:48 -07:00
stripspace.c config: don't include config.h by default 2017-06-15 12:56:22 -07:00
submodule--helper.c Merge branch 'bw/ref-prefix-for-configured-refspec' 2018-05-30 21:51:26 +09:00
symbolic-ref.c refs: rename constant REF_NODEREF to REF_NO_DEREF 2017-11-06 10:31:08 +09:00
tag.c Merge branch 'sb/oid-object-info' 2018-05-23 14:38:16 +09:00
unpack-file.c sha1_file: convert read_sha1_file to struct object_id 2018-03-14 09:23:50 -07:00
unpack-objects.c Sync with Git 2.17.1 2018-05-29 17:10:05 +09:00
update-index.c Merge branch 'js/use-bug-macro' 2018-05-30 14:04:07 +09:00
update-ref.c refs: rename constant REF_NODEREF to REF_NO_DEREF 2017-11-06 10:31:08 +09:00
update-server-info.c parse-options: let OPT__FORCE take optional flags argument 2018-02-09 10:24:50 -08:00
upload-archive.c upload-archive: handle "-h" option early 2017-05-30 14:45:04 +09:00
upload-pack.c Merge branch 'bw/protocol-v2' 2018-05-08 15:59:16 +09:00
var.c config: don't include config.h by default 2017-06-15 12:56:22 -07:00
verify-commit.c sha1_file: convert read_sha1_file to struct object_id 2018-03-14 09:23:50 -07:00
verify-pack.c config: don't include config.h by default 2017-06-15 12:56:22 -07:00
verify-tag.c ref-filter: use "struct object_id" consistently 2018-04-09 06:14:45 +09:00
worktree.c Merge branch 'tg/worktree-add-existing-branch' 2018-05-23 14:38:18 +09:00
write-tree.c cache-tree: convert write_*_as_tree to object_id 2018-03-14 09:23:47 -07:00