log: add exhaustive tests for pattern style options & config

Add exhaustive tests for how the different grep.patternType options &
the corresponding command-line options affect git-log.

Before this change it was possible to patch revision.c so that the
--basic-regexp option was synonymous with --extended-regexp, and
--perl-regexp wasn't recognized at all, and still have 100% of the
test suite pass.

This was because the first test being modified here, added in commit
34a4ae55b2 ("log --grep: use the same helper to set -E/-F options as
"git grep"", 2012-10-03), didn't actually check whether we'd enabled
extended regular expressions as distinct from re-toggling non-fixed
string support.

Fix that by changing the pattern to a pattern that'll only match if
--extended-regexp option is provided, but won't match under the
default --basic-regexp option.

Other potential regressions were possible since there were no tests
for the rest of the combinations of grep.patternType configuration
toggles & corresponding git-log command-line options. Add exhaustive
tests for those.

The patterns being passed to fixed/basic/extended/PCRE are carefully
crafted to return the wrong thing if the grep engine were to pick any
other matching method than the one it's told to use.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 file changed
tree: 6bdd0293a3244fb42829e8a08e42829960dc8723
  1. block-sha1/
  2. builtin/
  3. ci/
  4. compat/
  5. contrib/
  6. Documentation/
  7. ewah/
  8. git-gui/
  9. gitk-git/
  10. gitweb/
  11. mergetools/
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  15. refs/
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  58. check_bindir
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  120. generate-cmdlist.sh
  121. gettext.c
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  123. git-add--interactive.perl
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  125. git-bisect.sh
  126. git-compat-util.h
  127. git-cvsexportcommit.perl
  128. git-cvsimport.perl
  129. git-cvsserver.perl
  130. git-difftool--helper.sh
  131. git-filter-branch.sh
  132. git-instaweb.sh
  133. git-merge-octopus.sh
  134. git-merge-one-file.sh
  135. git-merge-resolve.sh
  136. git-mergetool--lib.sh
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  138. git-p4.py
  139. git-parse-remote.sh
  140. git-quiltimport.sh
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  143. git-rebase--merge.sh
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  145. git-remote-testgit.sh
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  147. git-send-email.perl
  148. git-sh-i18n.sh
  149. git-sh-setup.sh
  150. git-stash.sh
  151. git-submodule.sh
  152. git-svn.perl
  153. GIT-VERSION-GEN
  154. git-web--browse.sh
  155. git.c
  156. git.rc
  157. gpg-interface.c
  158. gpg-interface.h
  159. graph.c
  160. graph.h
  161. grep.c
  162. grep.h
  163. hash.h
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  177. INSTALL
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  180. kwset.c
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  182. levenshtein.c
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  184. LGPL-2.1
  185. line-log.c
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  261. README.md
  262. ref-filter.c
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  264. reflog-walk.c
  265. reflog-walk.h
  266. refs.c
  267. refs.h
  268. remote-curl.c
  269. remote-testsvn.c
  270. remote.c
  271. remote.h
  272. replace_object.c
  273. rerere.c
  274. rerere.h
  275. resolve-undo.c
  276. resolve-undo.h
  277. revision.c
  278. revision.h
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  281. send-pack.c
  282. send-pack.h
  283. sequencer.c
  284. sequencer.h
  285. server-info.c
  286. setup.c
  287. sh-i18n--envsubst.c
  288. sha1-array.c
  289. sha1-array.h
  290. sha1-lookup.c
  291. sha1-lookup.h
  292. sha1_file.c
  293. sha1_name.c
  294. shallow.c
  295. shell.c
  296. shortlog.h
  297. show-index.c
  298. sideband.c
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  300. sigchain.c
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  302. split-index.c
  303. split-index.h
  304. strbuf.c
  305. strbuf.h
  306. streaming.c
  307. streaming.h
  308. string-list.c
  309. string-list.h
  310. submodule-config.c
  311. submodule-config.h
  312. submodule.c
  313. submodule.h
  314. symlinks.c
  315. tag.c
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  317. tar.h
  318. tempfile.c
  319. tempfile.h
  320. thread-utils.c
  321. thread-utils.h
  322. tmp-objdir.c
  323. tmp-objdir.h
  324. trace.c
  325. trace.h
  326. trailer.c
  327. trailer.h
  328. transport-helper.c
  329. transport.c
  330. transport.h
  331. tree-diff.c
  332. tree-walk.c
  333. tree-walk.h
  334. tree.c
  335. tree.h
  336. unicode_width.h
  337. unimplemented.sh
  338. unix-socket.c
  339. unix-socket.h
  340. unpack-trees.c
  341. unpack-trees.h
  342. upload-pack.c
  343. url.c
  344. url.h
  345. urlmatch.c
  346. urlmatch.h
  347. usage.c
  348. userdiff.c
  349. userdiff.h
  350. utf8.c
  351. utf8.h
  352. varint.c
  353. varint.h
  354. version.c
  355. version.h
  356. versioncmp.c
  357. walker.c
  358. walker.h
  359. wildmatch.c
  360. wildmatch.h
  361. worktree.c
  362. worktree.h
  363. wrap-for-bin.sh
  364. wrapper.c
  365. write_or_die.c
  366. ws.c
  367. wt-status.c
  368. wt-status.h
  369. xdiff-interface.c
  370. xdiff-interface.h
  371. zlib.c
README.md

Git - fast, scalable, distributed revision control system

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.

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

See Documentation/gittutorial.txt to get started, then see Documentation/giteveryday.txt for a useful minimum set of commands, and Documentation/git-.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).

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 https://public-inbox.org/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.

The name “git” was given by Linus Torvalds when he wrote the very first version. He described the tool as “the stupid content tracker” and the name as (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