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2012-11-27test: add failing tests for "diff --stat" to t4049Libravatar Junio C Hamano1-1/+45
There are a few problems in diff.c around --stat area, partially caused by the recent 74faaa1 (Fix "git diff --stat" for interesting - but empty - file changes, 2012-10-17), and largely caused by the earlier change that introduced when --stat-count was added. Add a few test pieces to t4049 to expose the issues. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-10-17Fix "git diff --stat" for interesting - but empty - file changesLibravatar Linus Torvalds3-26/+27
The behavior of "git diff --stat" is rather odd for files that have zero lines of changes: it will discount them entirely unless they were renames. Which means that the stat output will simply not show files that only had "other" changes: they were created or deleted, or their mode was changed. Now, those changes do show up in the summary, but so do renames, so the diffstat logic is inconsistent. Why does it show renames with zero lines changed, but not mode changes or added files with zero lines changed? So change the logic to not check for "is_renamed", but for "is_interesting" instead, where "interesting" is judged to be any action but a pure data change (because a pure data change with zero data changed really isn't worth showing, if we ever get one in our diffpairs). So if you did chmod +x Makefile git diff --stat before, it would show empty (" 0 files changed"), with this it shows Makefile | 0 1 file changed, 0 insertions(+), 0 deletions(-) which I think is a more correct diffstat (and then with "--summary" it shows *what* the metadata change to Makefile was - this is completely consistent with our handling of renamed files). Side note: the old behavior was *really* odd. With no changes at all, "git diff --stat" output was empty. With just a chmod, it said "0 files changed". No way is our legacy behavior sane. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-10-10Merge branch 'bw/cp-a-is-gnuism'Libravatar Junio C Hamano3-3/+3
* bw/cp-a-is-gnuism: tests: "cp -a" is a GNUism
2012-10-10svn test: escape peg revision separator using empty peg revLibravatar Jonathan Nieder1-1/+1
This test script uses "svn cp" to create a branch with an @-sign in its name: svn cp "pr ject/trunk" "pr ject/branches/not-a@{0}reflog" That sets up for later tests that fetch the branch and check that git svn mangles the refname appropriately. Unfortunately, modern svn versions interpret path arguments with an @-sign as an example of path@revision syntax (which pegs a path to a particular revision) and truncate the path or error out with message "svn: E205000: Syntax error parsing peg revision '{0}reflog'". When using subversion 1.6.x, escaping the @ sign as %40 avoids trouble (see 08fd28bb, 2010-07-08). Newer versions are stricter: $ svn cp "$repo/pr ject/trunk" "$repo/pr ject/branches/not-a%40{reflog}" svn: E205000: Syntax error parsing peg revision '%7B0%7Dreflog' The recommended method for escaping a literal @ sign in a path passed to subversion is to add an empty peg revision at the end of the path ("branches/not-a@{0}reflog@"). Do that. Pre-1.6.12 versions of Subversion probably treat the trailing @ as another literal @-sign (svn issue 3651). Luckily ever since v1.8.0-rc0~155^2~7 (t9118: workaround inconsistency between SVN versions, 2012-07-28) the test can survive that. Tested with Debian Subversion 1.6.12dfsg-6 and 1.7.5-1 and r1395837 of Subversion trunk (1.8.x). Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Tested-by: Michael J Gruber <git@drmicha.warpmail.net> Signed-off-by: Eric Wong <normalperson@yhbt.net>
2012-10-08tests: "cp -a" is a GNUismLibravatar Ben Walton3-3/+3
These tests just want a bit-for-bit identical copy; they do not need even -H (there is no symbolic link involved) nor -p (there is no funny permission or ownership issues involved). Just use "cp -R" instead. Signed-off-by: Ben Walton <bdwalton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-10-08Merge branch 'jc/maint-t1450-fsck-order-fix'Libravatar Junio C Hamano1-3/+1
The fsck test assumed too much on what kind of error it will detect. The only important thing is the inconsistency is detected as an error. * jc/maint-t1450-fsck-order-fix: t1450: the order the objects are checked is undefined
2012-10-05Make git-svn branch patterns match complete URLLibravatar Ammon Riley1-0/+9
When using the {word,[...]} style of configuration for tags and branches, it appears the intent is to only match whole path parts, since the words in the {} pattern are meta-character quoted. When the pattern word appears in the beginning or middle of the url, it's matched completely, since the left side, pattern, and (non-empty) right side are joined together with path separators. However, when the pattern word appears at the end of the URL, the right side is an empty pattern, and the resulting regex matches more than just the specified pattern. For example, if you specify something along the lines of branches = branches/project/{release_1,release_2} and your repository also contains "branches/project/release_1_2", you will also get the release_1_2 branch. By restricting the match regex with anchors, this is avoided. Signed-off-by: Ammon Riley <ammon.riley@gmail.com> Signed-off-by: Eric Wong <normalperson@yhbt.net>
2012-10-05t9164: Add missing quotes in testLibravatar Robert Luberda1-4/+4
This fixes `ambiguous redirect' error given by bash. [ew: fix misspelled test name, also eliminate space after ">>" to conform to guidelines] Signed-off-by: Eric Wong <normalperson@yhbt.net>
2012-10-05git-svn.perl: keep processing all commits in parents_excludeLibravatar Steven Walter1-0/+53
This fixes a bug where git finds the incorrect merge parent. Consider a repository with trunk, branch1 of trunk, and branch2 of branch1. Without this change, git interprets a merge of branch2 into trunk as a merge of branch1 into trunk. Signed-off-by: Steven Walter <stevenrwalter@gmail.com> Reviewed-by: Sam Vilain <sam@vilain.net> Signed-off-by: Eric Wong <normalperson@yhbt.net>
2012-10-05git-svn.perl: consider all ranges for a given merge, instead of only tip-by-tipLibravatar Steven Walter1-0/+60
Consider the case where you have trunk, branch1 of trunk, and branch2 of branch1. trunk is merged back into branch2, and then branch2 is reintegrated into trunk. The merge of branch2 into trunk will have svn:mergeinfo property references to both branch1 and branch2. When git-svn fetches the commit that merges branch2 (check_cherry_pick), it is necessary to eliminate the merged contents of branch1 as well as branch2, or else the merge will be incorrectly ignored as a cherry-pick. Signed-off-by: Steven Walter <stevenrwalter@gmail.com> Reviewed-by: Sam Vilain <sam@vilain.net> Signed-off-by: Eric Wong <normalperson@yhbt.net>
2012-10-02Merge branch 'nd/grep-reflog'Libravatar Junio C Hamano1-0/+42
Teach the commands from the "log" family the "--grep-reflog" option to limit output by string that appears in the reflog entry when the "--walk-reflogs" option is in effect. * nd/grep-reflog: revision: make --grep search in notes too if shown log --grep-reflog: reject the option without -g revision: add --grep-reflog to filter commits by reflog messages grep: prepare for new header field filter
2012-10-02Merge branch 'tu/gc-auto-quiet'Libravatar Junio C Hamano1-2/+1
"gc --auto" notified the user that auto-packing has triggered even under the "--quiet" option. * tu/gc-auto-quiet: silence git gc --auto --quiet output
2012-10-02t1450: the order the objects are checked is undefinedLibravatar Junio C Hamano1-3/+1
When a tag T points at an object X that is of a type that is different from what the tag records as, fsck should report it as an error. However, depending on the order X and T are checked individually, the actual error message can be different. If X is checked first, fsck remembers X's type and then when it checks T, it notices that T records X as a wrong type (i.e. the complaint is about a broken tag T). If T is checked first, on the other hand, fsck remembers that we need to verify X is of the type tag records, and when it later checks X, it notices that X is of a wrong type (i.e. the complaint is about a broken object X). The important thing is that fsck notices such an error and diagnoses the issue on object X, but the test was expecting that we happen to check objects in the order to make us detect issues with tag T, not with object X. Remove this unwarranted assumption. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-10-02Merge branch 'rr/maint-submodule-unknown-cmd' into maintLibravatar Junio C Hamano1-2/+2
"git submodule frotz" was not diagnosed as "frotz" being an unknown subcommand to "git submodule"; the user instead got a complaint that "git submodule status" was run with an unknown path "frotz". * rr/maint-submodule-unknown-cmd: submodule: if $command was not matched, don't parse other args
2012-10-02Merge branch 'sp/maint-http-enable-gzip' into maintLibravatar Junio C Hamano1-1/+2
"git fetch" over http advertised that it supports "deflate", which is much less common, and did not advertise more common "gzip" on its Accept-Encoding header. * sp/maint-http-enable-gzip: Enable info/refs gzip decompression in HTTP client
2012-10-01Merge branch 'jk/completion-tests'Libravatar Junio C Hamano1-0/+60
* jk/completion-tests: t9902: add completion tests for "odd" filenames t9902: add a few basic completion tests
2012-10-01Merge branch 'ep/malloc-check-perturb'Libravatar Junio C Hamano2-2/+2
Fixes a brown-paper bag bug. * ep/malloc-check-perturb: MALLOC_CHECK: enable it, unless disabled explicitly
2012-10-01Merge branch 'da/mergetool-custom'Libravatar Junio C Hamano2-0/+24
The actual external command to run for mergetool backend can be specified with difftool/mergetool.$name.cmd configuration variables, but this mechanism was ignored for the backends we natively support. * da/mergetool-custom: mergetool--lib: Allow custom commands to override built-ins
2012-10-01Merge branch 'jk/receive-pack-unpack-error-to-pusher'Libravatar Junio C Hamano1-1/+1
Send errors from "unpack-objects" and "index-pack" back to the "git push" over the git and smart-http protocols, just like it is done for a push over the ssh protocol. * jk/receive-pack-unpack-error-to-pusher: receive-pack: drop "n/a" on unpacker errors receive-pack: send pack-processing stderr over sideband receive-pack: redirect unpack-objects stdout to /dev/null
2012-10-01Merge branch 'rt/maint-clone-single'Libravatar Junio C Hamano1-0/+156
Running "git fetch" in a repository made with "git clone --single" slurps all the branches, defeating the point of "--single". * rt/maint-clone-single: clone --single: limit the fetch refspec to fetched branch
2012-09-29Merge branch 'jc/maint-log-grep-all-match-1' into maintLibravatar Junio C Hamano1-14/+76
* jc/maint-log-grep-all-match-1: grep.c: make two symbols really file-scope static this time t7810-grep: test --all-match with multiple --grep and --author options t7810-grep: test interaction of multiple --grep and --author options t7810-grep: test multiple --author with --all-match t7810-grep: test multiple --grep with and without --all-match t7810-grep: bring log --grep tests in common form grep.c: mark private file-scope symbols as static log: document use of multiple commit limiting options log --grep/--author: honor --all-match honored for multiple --grep patterns grep: show --debug output only once grep: teach --debug option to dump the parse tree
2012-09-29Merge branch 'jc/maint-mailinfo-mime-attr' into maintLibravatar Junio C Hamano5-1/+30
* jc/maint-mailinfo-mime-attr: mailinfo: do not concatenate charset= attribute values from mime headers
2012-09-29Merge branch 'rr/maint-submodule-unknown-cmd'Libravatar Junio C Hamano1-2/+2
* rr/maint-submodule-unknown-cmd: submodule: if $command was not matched, don't parse other args
2012-09-29Merge branch 'jk/smart-http-switch'Libravatar Junio C Hamano1-0/+12
Allows users to turn off smart-http when talking to dumb-only servers. * jk/smart-http-switch: remote-curl: let users turn off smart http remote-curl: rename is_http variable
2012-09-29Merge branch 'sp/maint-http-enable-gzip'Libravatar Junio C Hamano1-1/+2
Allows a more common 'gzip' Accept-Encoding to be used. * sp/maint-http-enable-gzip: Enable info/refs gzip decompression in HTTP client
2012-09-29Merge branch 'aw/rebase-i-edit-todo'Libravatar Junio C Hamano1-0/+18
Teach an option to edit the insn sheet to "git rebase -i". * aw/rebase-i-edit-todo: rebase -i: suggest using --edit-todo to fix an unknown instruction rebase -i: Add tests for "--edit-todo" rebase -i: Teach "--edit-todo" action rebase -i: Refactor help messages for todo file rebase usage: subcommands can not be combined with -i
2012-09-29Merge branch 'js/rebase-exec-command-not-found'Libravatar Junio C Hamano1-0/+11
* js/rebase-exec-command-not-found: rebase -i: fix misleading error message after 'exec no-such' instruction
2012-09-29Merge branch 'rr/test-use-shell-path-not-shell'Libravatar Junio C Hamano1-16/+16
Fixes a brown-paper bag bug. * rr/test-use-shell-path-not-shell: test-lib: use $SHELL_PATH, not $SHELL
2012-09-29log --grep-reflog: reject the option without -gLibravatar Junio C Hamano1-0/+4
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-29revision: add --grep-reflog to filter commits by reflog messagesLibravatar Nguyễn Thái Ngọc Duy1-0/+26
Similar to --author/--committer which filters commits by author and committer header fields. --grep-reflog adds a fake "reflog" header to commit and a grep filter to search on that line. All rules to --author/--committer apply except no timestamp stripping. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-29grep: prepare for new header field filterLibravatar Nguyễn Thái Ngọc Duy1-0/+12
grep supports only author and committer headers, which have the same special treatment that later headers may or may not have. Check for field type and only strip_timestamp() when the field is either author or committer. GREP_HEADER_FIELD_MAX is put in the grep_header_field enum to be calculated automatically, correctly, as long as it's at the end of the enum. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-27silence git gc --auto --quiet outputLibravatar Tobias Ulmer1-2/+1
When --quiet is requested, gc --auto should not display messages unless there is an error. Signed-off-by: Tobias Ulmer <tobiasu@tmux.org> Acked-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-27t9902: add completion tests for "odd" filenamesLibravatar Jeff King1-0/+19
We correctly handle completion items with spaces just fine, since we pass the lists around with newline delimiters. However, we do not handle filenames with shell metacharacters, as "compgen -W" performs expansion on the list we give it. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-27t9902: add a few basic completion testsLibravatar Jeff King1-0/+41
We were not testing ref or tree completion at all. Let's give them even basic sanity checks to avoid regressions. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-26MALLOC_CHECK: enable it, unless disabled explicitlyLibravatar René Scharfe2-2/+2
The malloc checks in tests are currently disabled. Actually evaluate the variable for turning them off and enable them if it's unset. Also use this opportunity to give it the more descriptive and consistent name TEST_NO_MALLOC_CHECK. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-25submodule: if $command was not matched, don't parse other argsLibravatar Ramkumar Ramachandra1-2/+2
"git submodule" command DWIMs the command line and assumes a unspecified action word for 'status' action. This is a UI mistake that leads to a confusing behaviour. A mistyped command name is instead treated as a request for 'status' of the submodule with that name, e.g. $ git submodule show error: pathspec 'show' did not match any file(s) known to git. Did you forget to 'git add'? Stop DWIMming an unknown or mistyped subcommand name as pathspec given to unspelled "status" subcommand. "git submodule" without any argument is still interpreted as "git submodule status", but its value is questionable. Adjust t7400 to match, and stop advertising the default subcommand being 'status' which does not help much in practice, other than promoting laziness and confusion. Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-25Merge branch 'rr/test-make-sure-we-have-git'Libravatar Junio C Hamano2-10/+9
Only the first test t0000 in the test suite made sure we have built Git to be tested; move the check to test-lib so that it applies to all tests equally. * rr/test-make-sure-we-have-git: t/test-lib: make sure Git has already been built
2012-09-25Merge branch 'ep/malloc-check-perturb'Libravatar Junio C Hamano2-0/+24
Run our test scripts with MALLOC_CHECK_ and MALLOC_PERTURB_, the built-in memory access checking facility GNU libc has. * ep/malloc-check-perturb: MALLOC_CHECK: various clean-ups Add MALLOC_CHECK_ and MALLOC_PERTURB_ libc env to the test suite for detecting heap corruption
2012-09-25Merge branch 'aj/xfuncname-ada'Libravatar Junio C Hamano5-1/+55
* aj/xfuncname-ada: Add userdiff patterns for Ada
2012-09-25Merge branch 'jc/maint-mailinfo-mime-attr'Libravatar Junio C Hamano5-1/+30
When "git am" is fed an input that has multiple "Content-type: ..." header, it did not grok charset= attribute correctly. * jc/maint-mailinfo-mime-attr: mailinfo: do not concatenate charset= attribute values from mime headers
2012-09-25test-lib: use $SHELL_PATH, not $SHELLLibravatar Ramkumar Ramachandra1-16/+16
The codepath for handling "--tee" ends up relaunching the test script under a shell, and that one has to be a Bourne. But we incorrectly used $SHELL, which could be a non-Bourne (e.g. zsh or csh); we have the Makefile variable $SHELL_PATH for exactly that, so use it instead. Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-25mergetool--lib: Allow custom commands to override built-insLibravatar David Aguilar2-0/+24
Allow users to override the default commands provided by the mergetools/* scriptlets. Users occasionally run into problems where they expect to be able to override the built-in tool names. The documentation does not explicitly mention that built-ins cannot be overridden, so it's easy to assume that it should work. Lift this restriction so that built-in tools are handled the same way as user-configured tools. Add tests to guarantee this behavior. A nice benefit of this change is that it protects users from having future versions of git trump their custom configuration with a new built-in tool. C.f.: http://stackoverflow.com/questions/7435002/mergetool-from-gitconfig-being-ignored http://thread.gmane.org/gmane.comp.version-control.msysgit/13188 http://thread.gmane.org/gmane.comp.version-control.git/148267 Signed-off-by: David Aguilar <davvid@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-24Merge branch 'jc/maint-blame-no-such-path' into maintLibravatar Junio C Hamano1-1/+1
Even during a conflicted merge, "git blame $path" always meant to blame uncommitted changes to the "working tree" version; make it more useful by showing cleanly merged parts as coming from the other branch that is being merged. This incidentally fixes an unrelated problem on a case insensitive filesystem, where "git blame MAKEFILE" run in a history that has "Makefile" but not "MAKEFILE" did not say "No such file MAKEFILE in HEAD" but pretended as if "MAKEFILE" was a newly added file. * jc/maint-blame-no-such-path: blame: allow "blame file" in the middle of a conflicted merge blame $path: avoid getting fooled by case insensitive filesystems
2012-09-24Merge branch 'dj/fetch-all-tags' into maintLibravatar Junio C Hamano1-0/+30
"git fetch --all", when passed "--no-tags", did not honor the "--no-tags" option while fetching from individual remotes (the same issue existed with "--tags", but combination "--all --tags" makes much less sense than "--all --no-tags"). * dj/fetch-all-tags: fetch --all: pass --tags/--no-tags through to each remote submodule: use argv_array instead of hand-building arrays fetch: use argv_array instead of hand-building arrays argv-array: fix bogus cast when freeing array argv-array: add pop function
2012-09-21remote-curl: let users turn off smart httpLibravatar Jeff King1-0/+12
Usually there is no need for users to specify whether an http remote is smart or dumb; the protocol is designed so that a single initial request is made, and the client can determine the server's capability from the response. However, some misconfigured dumb-only servers may not like the initial request by a smart client, as it contains a query string. Until recently, commit 703e6e7 worked around this by making a second request. However, that commit was recently reverted due to its side effect of masking the initial request's error code. Since git has had that workaround for several years, we don't know exactly how many such misconfigured servers are out there. The reversion of 703e6e7 assumes they are rare enough not to worry about. Still, that reversion leaves somebody who does run into such a server with no escape hatch at all. Let's give them an environment variable they can tweak to perform the "dumb" request. This is intentionally not a documented interface. It's overly simple and is really there for debugging in case somebody does complain about git not working with their server. A real user-facing interface would entail a per-remote or per-URL config variable. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-21receive-pack: drop "n/a" on unpacker errorsLibravatar Jeff King1-1/+1
The output from git push currently looks like this: $ git push dest HEAD fatal: [some message from index-pack] error: unpack failed: index-pack abnormal exit To dest ! [remote rejected] HEAD -> master (n/a (unpacker error)) That n/a is meant to be "the per-ref status is not available" but the nested parentheses just make it look ugly. Let's turn the final line into just: ! [remote rejected] HEAD -> master (unpacker error) Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-20Merge branch 'nd/maint-remote-remove' into maintLibravatar Junio C Hamano2-3/+3
* nd/maint-remote-remove: remote: prefer subcommand name 'remove' to 'rm'
2012-09-20clone --single: limit the fetch refspec to fetched branchLibravatar Ralf Thielow1-0/+156
After running "git clone --single", the resulting repository has the usual default "+refs/heads/*:refs/remotes/origin/*" wildcard fetch refspec installed, which means that a subsequent "git fetch" will end up grabbing all the other branches. Update the fetch refspec to cover only the singly cloned ref instead to correct this. That means: If "--single" is used without "--branch" or "--mirror", the fetch refspec covers the branch on which remote's HEAD points to. If "--single" is used with "--branch", it'll cover only the branch specified in the "--branch" option. If "--single" is combined with "--mirror", then it'll cover all refs of the cloned repository. If "--single" is used with "--branch" that specifies a tag, then it'll cover only the ref for this tag. Signed-off-by: Ralf Thielow <ralf.thielow@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-20Enable info/refs gzip decompression in HTTP clientLibravatar Shawn O. Pearce1-1/+2
Some HTTP servers try to use gzip compression on the /info/refs request to save transfer bandwidth. Repositories with many tags may find the /info/refs request can be gzipped to be 50% of the original size due to the few but often repeated bytes used (hex SHA-1 and commonly digits in tag names). For most HTTP requests enable "Accept-Encoding: gzip" ensuring the /info/refs payload can use this encoding format. Only request gzip encoding from servers. Although deflate is supported by libcurl, most servers have standardized on gzip encoding for compression as that is what most browsers support. Asking for deflate increases request sizes by a few bytes, but is unlikely to ever be used by a server. Disable the Accept-Encoding header on probe RPCs as response bodies are supposed to be exactly 4 bytes long, "0000". The HTTP headers requesting and indicating compression use more space than the data transferred in the body. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-18Merge branch 'jc/maint-log-grep-all-match'Libravatar Junio C Hamano1-14/+76
Fix a long-standing bug in "git log --grep" when multiple "--grep" are used together with "--all-match" and "--author" or "--committer". * jc/maint-log-grep-all-match: t7810-grep: test --all-match with multiple --grep and --author options t7810-grep: test interaction of multiple --grep and --author options t7810-grep: test multiple --author with --all-match t7810-grep: test multiple --grep with and without --all-match t7810-grep: bring log --grep tests in common form grep.c: mark private file-scope symbols as static log: document use of multiple commit limiting options log --grep/--author: honor --all-match honored for multiple --grep patterns grep: show --debug output only once grep: teach --debug option to dump the parse tree