We use '+++' syntax to output a literal '**' for a '--glob' example.
This '+++' syntax is pretty ugly when rendered literally via --help. We
fix this by hackily inserting the '+++' syntax for its one specific case
that we need it during man page generation.
Not ideal but it works. And --help still has some '*foo*' markup, but we
live with that for now.
Fixes#1581
While Linux distributions (at least Arch Linux, RHEL, Debian) do not support
compressing files with compress(1), macOS & AIX do (the utility is part of
POSIX). Additionally, gzip is able to uncompress such compressed files and
provides an `uncompress` binary.
Closes#1547
When a pattern with invalid UTF-8 is given, the error message suggests
unqualified use of hex escape sequences to match arbitrary bytes. But
you *also* need to disable Unicode mode. So include that in the error
message.
Fixes#1339
In order to implement --count-matches, we simply re-execute the regex on
the spans reported by the searcher. The spans always correspond to the
lines that participated in the match. This is the correct thing to do,
except when the regex contains look-ahead (or look-behind).
In particular, the look-around permits the regex's match success to
depends on an arbitrary point before or after the lines actually
reported as participating in the match. Since only the matched lines are
reported to the printer, it is possible for subsequent searching on
those lines to fail.
A true fix for this would somehow make the total span available to the
printer. But that seems tricky since it isn't always available. For
PCRE2's case in multiline mode, it is available because we force it to
be so for correctness.
For now, we simply detect this corner case heuristically. If the match
count is zero, then it necessarily means there is some kind of
look-around that isn't matching. So we set the match count to 1. This is
probably incorrect in some cases, although my brain can't quite come up
with a concrete example. Nevertheless, this is strictly better than the
status quo.
Fixes#1573
We should not assume that the commondir file actually exists. If it
doesn't, then just move on. This otherwise emits an error message when
searching normal submodules, which is not OK.
This regression was introduced in #1446.
Fixes#1520
If a literal is entirely whitespace, then it's quite likely that it is
very common. So when that case occurs, just don't do (inner) literal
optimizations at all.
The regex engine may still make sub-optimal decisions here, but that's a
problem for another day.
Fixes#1087
The purpose of this flag is to force ripgrep to ignore all --ignore-file
flags (whether they come before or after --no-ignore-files).
This flag can be overridden with --ignore-files.
Fixes#1466
It doesn't really belong in the man page since it's an artifact of a
build/runtime configuration. Moreover, it inhibits reproducible builds.
Fixes#1441
This permits switching between the different regex engine modes that
ripgrep supports. The purpose of this flag is to make it easier to
extend ripgrep with additional regex engines.
Closes#1488, Closes#1502
Due to how walkdir works if symlinks are not followed, symlinks to
directories are seen as simple files by ripgrep. This caused a panic
in some cases due to receiving a WalkEvent::Exit event without a
corresponding WalkEvent::Dir event.
This is fixed by looking at the metadata of the file in the case of a
symlink to determine if it's a directory. We are careful to only do
this stat check when the depth of the entry is 0, as this bug only
impacts us when 1) we aren't following symlinks generally and 2) the
user provides a symlinked directory that we do follow as a top-level
path to search.
Fixes#1389, Closes#1397
This adds a universal --no-unicode flag that is intended to work for all
supported regex engines. There is no point in retaining
--no-pcre2-unicode, so we make them aliases to the new flags and
deprecate them.
This flag prevents ripgrep from requiring one to search a git repository
in order to respect git-related ignore rules (global, .gitignore and
local excludes). This actually corresponds to behavior ripgrep had long
ago, but #934 changed that. It turns out that users were relying on this
buggy behavior. In most cases, fixing it as simple as converting one's
rules to .ignore or .rgignore files. Unfortunately, there are other use
cases---like Perforce automatically respecting .gitignore files---that
make a strong case for ripgrep to at least support this.
The UX of a flag like this is absolutely atrocious. It's so obscure that
it's really not worth explicitly calling it out anywhere. Moreover, the
error cases that occur when this flag isn't used (but its behavior is
desirable) will not be intuitive, do not seem easily detectable and will
not guide users to this flag. Nevertheless, the motivation for this is
just barely strong enough for me to begrudgingly accept this.
Fixes#1414, Closes#1416
This appears to be another transcription bug from copying this code from
the prefix literal detection from inside the regex crate. Namely, when
it comes to inner literals, we only want to treat counted repetition as
two separate cases: the case when the minimum match is 0 and the case
when the minimum match is more than 0. In the former case, we treat
`e{0,n}` as `e*` and in the latter we treat `e{m,n}` where `m >= 1` as
just `e`.
We could definitely do better here. e.g., This means regexes like
`(foo){10}` will only have `foo` extracted as a literal, where searching
for the full literal would likely be faster.
The actual bug here was that we were not implementing this logic
correctly. Namely, we weren't always "cutting" the literals in the
second case to prevent them from being expanded.
Fixes#1319, Closes#1367
Git looks for this file in GIT_COMMON_DIR, which is usually the same
as GIT_DIR (.git). However, when searching inside a linked worktree,
.git is usually a file that contains the path of the actual git dir,
which in turn contains a file "commondir" which references the directory
where info/exclude may reside, alongside other configuration shared across
all worktrees. This directory is usually the git dir of the main worktree.
Unlike git this does *not* read environment variables GIT_DIR and
GIT_COMMON_DIR, because it is not clear how to interpret them when
searching multiple repositories.
Fixes#1445, Closes#1446
It turns out that querying the CWD while in a directory that no longer
exists results in an error. Since the CWD is queried every time ripgrep
starts---whether it needs it or not---for dealing with glob matching,
ripgrep winds up being completely useless inside a non-existent
directory.
We fix this in a few different ways:
* Firstly, if std::env::current_dir() fails, then we fall back to trying
to read the `PWD` environment variable.
* If that fails, that we return a more sensible error message so that a
user can at least react to the problem. Previously, the error message
was inscrutable.
* Finally, we try to avoid the problem altogether by building empty glob
matchers if not globs were provided, thus side-stepping querying the
CWD completely.
Fixes#1291, Closes#1400
This commit adds a new --no-ignore-exclude flag that permits disabling
the use of .git/info/exclude filtering. Local exclusions are manual
configurations to a repository and are not shared, so it is sometimes
useful to disable to get a consistent view of a repository.
This also adds a new section to the man page that describes automatic
filtering.
Closes#1420
Previously, ripgrep would always defer to the regex engine's capturing
matches in order to implement word matching. Namely, ripgrep would
determine the correct match offsets via a capturing group, since the
word regex is itself generated from the user supplied regex.
Unfortunately, the regex engine's capturing mode is still fairly slow,
so this commit adds a fast path to avoid capturing mode in the vast
majority of cases. See comments in the code for details.
When the -w/--word-regexp was used, ripgrep would in many cases fail to
apply literal optimizations. This occurs specifically when the regex
given by the user is an alternation of literals with no common prefixes
or suffixes, e.g.,
rg -w 'foo|bar|baz|quux'
In this case, the inner literal detector fails. Normally, this would
result in literal prefixes being detected by the regex engine. But
because of the -w/--word-regexp flag, the actual regex that we run ends
up looking like this:
(^|\W)(foo|bar|baz|quux)($|\W)
which of course defeats any prefix or suffix literal optimizations in
the regex crate's somewhat naive extractor. (A better extractor could
still do literal optimizations in the above case.)
So this commit fixes this by falling back to prefix or suffix literals
when they're available instead of prematurely giving up and assuming the
regex engine will do the rest.
This fixes an interesting performance bug where the inner literal
extractor would sometimes choose a sub-optimal literal. For example,
consider the regex:
\x20+Sherlock Holmes\x20+
(The `\x20` is the ASCII code for a space character, which we use here
to just make it clearer. It otherwise does not matter.)
Previously, this would see the initial \x20 and then stop collecting
literals after the `+` repetition operator. This was because the inner
literal detector was adapter from the prefix literal detector, which had
to stop here. Namely, while \x20S would be a valid prefix (for example),
\x20\x20S would also be a valid prefix. As would \x20\x20\x20S and so
on. So the prefix detector would have to stop at the repetition
operator. Otherwise, only searching for \x20S could potentially scan
farther then the starting position of the next match.
However, for inner literals, this calculus no longer makes sense. We can
freely search for, e.g., \x20S without missing matches that start with
\x20\x20S precisely because we know this is an inner literal which may
not correspond to the start of a match.
With this fix, the literal that is now detected is
\x20Sherlock Holmes\x20
Which is much better. We achieve this by no longer "cutting" literals
after seeing a `+` repetition operator. Instead, we permit literals to
continue to be extended.
The reason why this is important is because using \x20 as the literal to
search for is generally bad juju since it is so common. In fact, we
should probably add more logic here to either avoid such things or give
up entirely on the inner literal optimization if it detected a literal
that we think is very common. But we punt on such things here.
This flag, when used in conjunction with --count or --count-matches,
will print a result for each file searched even if there were zero
matches in that file. This is off by default but can be enabled to make
ripgrep behave more like grep.
This also clarifies some of the defaults for the
grep-printer::SummaryBuilder type.
Closes#1370, Closes#1405
--context-separator='' still adds a new line separator, which could
still potentially be useful. So we add a new `--no-context-separator`
flag that completely disables context separators even when the -A/-B/-C
context flags are used.
Closes#1390
This commit adds a simple `.exists()` check for `.gitignore`,
`.ignore`, and other similar files before actually calling
`File::open(…)` in `GitIgnoreBuilder::add`.
The reason is that a simple existence check via `stat` can be faster
than actually trying to `open` the file, see
https://stackoverflow.com/a/12774387/704831. As we typically expect(?)
the number of directories *without* ignore files to be much larger
than the number of directories *with* ignore files, this leads to an
overall speedup.
The performance gain is not huge for `rg`, but can be quite significant
if more `.gitignore`-like files are added via
`add_custom_ignore_filename`. The speedup is *larger* for folders with
*low* files-per-directory ratios.
Note though that we do not do this check on Windows until a specific
analysis there suggests this is beneficial. Namely, Windows generally
has slower file system operations, so it's not clear whether this
speculative check is actually a benefit or not.
Benchmark results
-----------------
`rg --files` in my home folder (200k results, 6.5 files per directory):
| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|:---|---:|---:|---:|---:|
| `./rg-master --files` | 396.4 ± 3.2 | 390.9 | 400.0 | 1.05 |
| `./rg-feature --files` | 376.0 ± 3.6 | 369.3 | 383.5 | 1.00 |
`rg --files --hidden` in my home folder (800k results, 5.4
files per directory)
| Command | Mean [s] | Min [s] | Max [s] | Relative |
|:---|---:|---:|---:|---:|
| `./rg-master --files --hidden` | 1.575 ± 0.012 | 1.560 | 1.597 | 1.06 |
| `./rg-feature --files --hidden` | 1.479 ± 0.011 | 1.464 | 1.496 | 1.00 |
`rg --files` in the chromium-79.0.3915.2 source tree (300k results, 12.7 files per
directory)
| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|:---|---:|---:|---:|---:|
| `~/rg-master --files` | 445.2 ± 5.3 | 435.6 | 453.0 | 1.04 |
| `~/rg-feature --files` | 428.9 ± 7.0 | 418.2 | 440.0 | 1.00 |
`rg --files` in the linux-5.3 source tree (65k results, 15.1
files per directory)
| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|:---|---:|---:|---:|---:|
| `./rg-master --files` | 94.5 ± 1.9 | 89.8 | 98.5 | 1.02 |
| `./rg-feature --files` | 92.6 ± 2.7 | 88.4 | 98.7 | 1.00 |
Closes#1381
If a preprocessor command could not be started, we now show some
additional context with the error message. Previously, it showed
something like this:
some/file: No such file or directory (os error 2)
Which is itself pretty misleading. Now it shows:
some/file: preprocessor command could not start: '"nonexist" "some/file"': No such file or directory (os error 2)
Fixes#1302
