The ugrep file pattern searcher

a more powerful, ultra fast, user-friendly, compatible grep (that is also completely free!)

ugrep release 7.0 Star

ugrep installs on

• MacOS: brew install ugrep
• MacOS: port install ugrep
• Windows: winget install Genivia.ugrep
• Windows: choco install ugrep
• Windows: scoop install ugrep
• Alpine: apk add ugrep ugrep-doc
• Android Termux: pkg install ugrep
• Arch: pacman -S ugrep
• CentOS: dnf install ugrep
• Debian: apt-get install ugrep
• Fedora: dnf install ugrep
• FreeBSD: pkg install ugrep
• NetBSD: download textproc/ugrep
• OpenBSD: pkg_add ugrep
• OpenSUSE: zypper install ugrep
• RHEL: dnf install ugrep
• Other Linux: download static builds
• Other:

  git clone https://github.com/Genivia/ugrep
  cd ugrep
  ./build.sh # build ug and ugrep in ugrep/bin
  sudo make install # install as desired
  

how fast is ugrep?

• Benchmarks: ugrep is fast(er)
• file indexer speeds up cold FS search

Search with a TUI (shown) or from the command line with grep-compatible options. You can also Google search (shown) and fuzzy search your files. Search (nested) zip/7z/tar/pax/cpio archives, tarballs and compressed files gz/Z/bz/bz2/lzma/xz/lz4/zstd/brotli, search and hexdump binary files, search documents such as PDF, doc, docx, and output in JSON, XML, CSV or your own customized format. Supports Unicode extended regex pattern syntax and multi-line pattern matching without requiring special command-line options.

Commands

Search for patterns in files with the ug and ugrep commands, where

ug

for user-friendly use, with an optional .ugrep configuration file with your preferences located in the working directory or in your home directory;
the ug+ command also searches pdfs, documents, e-books, image metadata

ug --save-config OPTIONS

saves a new .ugrep file in the working directory using the current .ugrep configuration and by copying the relevant OPTIONS (if any) to the new .ugrep file

ugrep

does not use a .ugrep configuration file and does not set default options: ugrep works best in shell scripts;
the ugrep+ command also searches pdfs, documents, e-books, image metadata

Examples:

ug -Q

start the interactive query TUI then enter patterns to recursively search for matching files, press F1 or CTRL-Z for help and options, press ALT-L to list matching files (option -l)

ug -%% -jwQ

recursively Google search files (option -%%) with smart ignore case (option -j) regex patterns matching words (option -w) in the interactive query TUI (option -Q)

ug PATTERN

recursively search for files matching PATTERN; a recursive search is performed when no search targets are specified

ug PATTERN FILE

search lines in FILE matching PATTERN

ug PATTERN DIR

search files in DIR matching PATTERN, excluding sub-directories (like ls DIR takes a DIR to list)

ug -r PATTERN DIR

recursively search files in DIR matching PATTERN, excluding symlinks

ug -rS PATTERN DIR

recursively search files in DIR matching PATTERN, including symlinks to files (option -S), but not to directories

ug -R PATTERN DIR

recursively search files in DIR matching PATTERN, including symlinks to files and directories

ug -3 PATTERN DIR

recursively search files in DIR matching PATTERN using -r up to 3 levels, i.e. DIR/, DIR/one/, and DIR/one/two/

ug -3 -g"foo*.txt" PATTERN DIR

recursively search for filenamess matching glob foo*.txt (option -g) as an inclusive search constraint in DIR using -r up to 3 levels

ug -z PATTERN

recursively search for files, archives and compressed files matching PATTERN

ug -z -tc,cpp -Z PATTERN

recursively search for files, archives and compressed files (option -z) for C and C++ source file types (option -t) that fuzzy match PATTERN (option -Z)

ug -z -l "" package.zip

list (option -l) files in archive package.zip (option -z) using an empty pattern "" to match all (or use option --match)

ug -z -W --pager "" mailattachment.zip

safely page through the contents of mailattachment.zip (option -z), hexdump binary contents (option -W) to reveal data

ug PATTERN -Opem --filter="pem:openssl x509 -passin pass: -text -in %

recursively find files with suffix .pem (option -O), then use openssl as a filter to search the certificate data

ug --save-config --ignore-files --ignore-binary --decompress

save a .ugrep configuration file that lets ug obey .gitignore rules in recursive searches, ignore binary files (-I) in searches and always search archives and compressed files (-z)

ug --help regex

get help on regex or specify an option name or a word to get help with

Usage tips:

1. the regex pattern syntax is standard POSIX ERE, same as egrep, but supporting Unicode by default
2. patterns match Unicode and may include newline breaks \n and \R to match multiple lines as a single match; some examples: the pattern "foo.*\n.*\n.*baz" matches a line with foo, a second line and a third line with baz, the pattern "foo(.*\n)*?.*bar" lazily matches one or more lines from foo to bar
3. quote "PATTERN" or 'PATTERN' to prevent globbing of the pattern by the shell that may expand *, ? and [a-z] into pathnames
4. Windows Command Prompt does not parse ' to quote patterns; you must use " instead
5. Windows PowerShell does not parse "" (empty pattern); you must specify --match instead
6. an empty pattern "" matches every line, same as option --match
7. multiple FILE and DIR pathname arguments may be specified as search targets; if none are provided, the working directory is recursively searched
8. standard input is searched if standard input is not a terminal, such as a pipe redirect
9. to replace grep: alias grep='ug -G'; alias egrep='ug -E'; alias fgrep='ug -F' or copy/symlink ugrep to grep, egrep and fgrep; it emulates according to these names

Options

Ugrep is compatible with GNU grep and supports GNU grep command-line options. But ugrep also offers new options and features. In general, command-line options can be mixed and specified in any order. Long options --OPTION may start with --no-OPTION to disable them. All short options have long alternatives. This page shows short options for the most part. Specify --stats to output a final summary search report of options, patterns, and search statistics.  

List matching files

-l

list matching files

-l -m5,

list files that have at least 5 matching lines (-m5, with the comma is the same as --min-count=5)

-l --max-files=3

list only the first 3 matching files

-L

list non-matching files, same as -lv i.e. option -v inverts matching

-c

count matching lines in files

-cv

count non-matching lines in files; option -v inverts matching

-cu

count all pattern matches by ungrouping multiple matches from lines (option -u)

-cm1,

count matching lines in files, but skip files with zero matches (-m1, with comma is --min-count=1)

Usage tips:

1. if you never want -c to output zero match counts, then add min-count=1 to your ~/.ugrep file (outputing zero match counts is a GNU grep behavior)
2. to disable directory tree-based listings, specify --no-tree or permanently add no-tree to your ~/.ugrep file
3. listings are sorted by name; to sort by date/time or by size, specify --sort=changed or --sort=size

Displaying matches, match info, match context

-H

always output the filename; normally, a filename is not output when searching a single specified file

-n

output the line number of a match

-k

output the column number of a match; specify --tabs=NUM to set the tab size to 1 (no expansion), 2, 4 or 8 (default)

-b

output the byte offset of a match

-u

ungroup multiple matches from lines to count and output each match separately

-C3

output matching lines with 3 lines as context before (option -B3) and after (option -A3)

-y

output matching lines with the rest of the file as context (--any-line or --passthru)

-o

output only the matching part

-o -C20

output only the matching part with the matching line as context before (option -B20) and after (option -A20) to fit 40 characters

--width

truncate lines to the terminal window width; --width=40 truncates to 40 characters

Pattern matching modes

-F

search for matching strings, not regex patterns, like GNU fgrep or grep -F

-G

BRE pattern syntax, like GNU grep or grep -G

-P

Perl regex pattern search with PCRE, see also ug --help regex

-Z

fuzzy search with the default ERE pattern syntax

-U

non-Unicode ASCII/binary search; patterns such as \xa3 match a byte, not the U+00a3 multi-byte code point

-Y

empty-matching patterns such as x*y*z* match all lines like GNU grep, instead of returning useful matches

-i

ignore case in matching patterns

-j

smart ignore case, enables -i when patterns are specified in lower case

-w

patterns must match as words and not be part of words

-x

patterns must match whole lines from start to end

-v

invert pattern matching; output lines that do not match

-e PATTERN

explicitly specify PATTERN; -e is used to specify multiple patterns and when specifying a pattern after the FILE argument

-N PATTERN

do not match PATTERN when combined with -e; for example -e "[0-9]+" -N "0+" matches nonzero numbers

-f FILE

read (additional) patterns from FILE

-f cpp/names

if cpp/names is not a local file, then read built-in C++ name-matching patterns (installed in /.../share/ugrep/patterns/cpp/names)

The interactive TUI

-Q

start TUI to specify search patterns and options interactively

-Q -e PATTERN

start TUI and search for PATTERN

-Q -e PATTERN --view=nano

start TUI to search for PATTERN, press CTRL-Y to edit a matching file at the first matching line with nano

Usage tips:

1. additional options, files and directories can be specified on the command line to start the TUI search
2. ALT-key toggles the option letter corresponding to the key press, for example ALT-L lists matching files (option -l) and SHIFT-ALT-C shows context (option -C3)
3. ALT-key in MacOS terminal is OPTION-key when "Use Option as Meta key" is enabled in Terminal Preferences/Profiles/Keyboard
4. navigate to directories and files with Tab, then SHIFT-Tab to go back and restore previous options and patterns (if changed)
5. use the cursor keys, PgUp, PgDn and the scroll wheel to scroll the search results
6. ALT-G glob editor to match filenames and directories (globs ending in /) or exclude them with ! for example !tmp/
7. CTRL-S jumps to the next context match, the next matching file or the next directory in the list, CTRL-W jumps back
8. CTRL-T or F5 toggles the split screen file viewer; option --split starts the TUI with the split screen
9. CTRL-X or F3 sets a bookmark and CTRL-R or F4 restores it
10. CTRL-Y or F2 displays a file in a pager, a specific pager or editor is specified with option --view=PAGER
11. CTRL-Z or F1 displays help and the active search options that can be toggled on/off with ALT-key or just key
12. ENTER enters output selection mode to select lines to output when exiting the TUI (selections are kept until TUI exits or until a new search is performed)

Googling files

-% "foo bar"

search files for lines matching both regex patterns foo and bar anywhere on the same line

-%% "foo bar"

find files matching both patterns foo and bar anywhere in the same file (-%% is the same as --bool --files)

-% "foo -bar"

search files for lines matching pattern foo that do not match bar anywhere on the same line

-%% "foo -bar"

find files matching pattern foo that do not match bar anywhere in the same file (-%% is the same as --bool --files)

-% "foo bar|baz"

search files for lines matching both patterns foo and bar|baz anywhere on the same line

-% "foo -(bar|baz)"

search files for lines matching pattern foo that do not match bar|baz anywhere on the same line

-% "foo AND NOT (bar OR baz)"

same as above, this time using AND-OR-NOT operators

-% "foo -bar -baz"

same as above, in normalized form (ugrep's internal CNF)

-% 'foo "-bar baz"'

search files for lines matching both patterns foo and -bar baz, where "-bar baz" is quoted to match literally "as is"

-F -% "*foo* bar?"

search files for lines matching both fixed (option -F) strings *foo* and bar? anywhere on the same line

Usage tips:

1. option -% (or --bool) can be combined with any pattern matching modes -F, -G, -P, -Z and other options
2. the default search mode is --lines for option -% to match lines
3. option -%% (or --bool --files) matches across entire files, like how a search engine returns results
4. white space in a pattern is a logical AND (lowest precedence)
5. a | in a pattern is a logical OR (taking higher precedence than AND)
6. white space followed by a - is a logical NOT (taking highest precedence)
7. operators AND, OR and NOT may also be used when properly spaced
8. quote strings in a pattern with " to match literally "as is"
9. group patterns with ( ) parentheses

Fuzzy search

-Z

approximately match patterns up to one extra, missing or replaced character in the input

-Z2

approximately match patterns up to two extra, missing or replaced characters in the input

-Z+2

approximately match patterns up to two extra characters in the input

-Z-2

approximately match patterns up to two missing characters in the input

-Z~2

approximately match patterns up to two replaced characters in the input

-Z+-2

approximately match patterns up to two extra or missing characters in the input

-Z+-~2

same as -Z2: approximately match patterns up to two extra, missing or replaced characters in the input

-c -Z

count approximate matches in files

-c -Zbest2

count -Z2 approximate matches in files, but only keep the best matches, i.e. if a file has at least one exact match, then only exact matches are counted

-c -Zbest2 --sort=best

count the best approximate matches in files and sort by best matching files for each (sub)directory searched

Usage tips:

1. the first character or characters that make up a pattern always match; to approximately match the first character(s), replace it with a . or .?
2. no whitespace may be given between -Z and its argument

Archives and compressed files

-z

also search zip/7z/tar/pax/cpio archives, tarballs and gz/Z/bz/bz2/lzma/xz/lz4/zstd/brotli compressed files

-z --zmax=2

also search archives, tarballs and compressed files stored within archives (max 2 levels)

-z -I --zmax=2

same as above, but ignore binary files and also those in (nested) archives and compressed files

-z -tc,cpp

search C and C++ source files and also those in archives, see also ug -tlist for a list of file types

-z -g"*.txt,*.md"

search files matching the globs *.txt and *.md and also those in archives, see also ug --help globs

-z -g"^bak/"

exclude all bak directories from the search and skip those in archives, see also ug --help globs

Usage tips:

1. to let ug always search archives and compressed files, add decompress to your ~/.ugrep file

Binary files and devices

-I

ignore binary files and exclude them from searches

-W

hexdump binary matches, while keeping text matches as text

-X

hexdump all matches

-U --hexdump

hexdump 8-bit binary regex pattern matches instead of Unicode character-based patterns (option -U)

--hexdump=4a

hexdump in 4 columns and output a * for hex lines that are identical to the previous line (a)

--hexdump=4ch

hexdump in 4 columns, no character column (c), no hex spacing (h)

--hexdump=4C3

hexdump in 4 columns with 3 hex lines of context before and after (C3 or B3A3)

--hexdump=4C3 -u -b

same as above, but ungroup matches (option -u) and output the byte position of each match (option -b)

-Dread

also read special devices to search them; danger: can get stuck on a non-responsive device!

Usage tips:

1. option -U disables Unicode in regex patterns; patterns such as \xa3 match a byte, not the U+00a3 multi-byte code point
2. option --hexdump takes optional argument [1-8][a][bch][A[NUM]][B[NUM]][C[NUM]] to output 1, 2, 3 or up to 8 columns of hexadecimal octets (default is 2), a outputs a * for all hex lines that are identical to the previous hex line, b removes all space breaks, c removes the character column, h removes hex spacing, A includes up to NUM hex lines after a match, B includes up to NUM hex lines before a match and C includes up to NUM hex lines before and after a match.

Exclusions and inclusions

-@

(--all) search all files except hidden: cancel previous restrictions; restrictions specified after this option are still applied, e.g. -@I searches all non-binary files

-.

(--hidden) include hidden files in searches; normally, hidden files are excluded from searching

-I

ignore binary files and exclude them from searches

-p

never follow symlinks, even when specified on the command line

-r

search recursively without following symlinks

-rS

search recursively following symlinks to files, but not to directories (option -S)

-R

search recursively following symlinks to files and directories

-tc,cpp

only search C and C++ source files, see also ug -tlist for a list of file types

-Ohpp,cpp

shorthand for -g"*.hpp,*.cpp" with filename extension globs to search .hpp and .cpp files

-g"*.hpp,*.cpp"

only search .hpp and .cpp files with the specified glob patterns, see also ug --help globs

-g"src/"

only recursively search src directories with the specified glob pattern ending in a / for directories, see also ug --help globs

-g"^*.txt,^bak/"

do not search .txt files and bak directories with the specified negated glob patterns, see also ug --help globs

--iglob="^*.txt,^bak/"

same as above, but with case-insensitive glob matching (option --glob-ignore-case applies to all globs)

-K10,99

only search files from line 10 up to and including line 99

-m1

output only the first matching line (same as --max-count=1)

-m2,9

only search files with at least two matching lines and output up to and including 9 matching lines

-m2,9 -u

only search files with at least two matches and output up to and including 9 matches

-3

recursively search up to three directory levels deep, i.e. one/, one/two/, and one/two/three/

-2-3

only recursively search sub-directories at two to three levels deep, i.e. one/two/, and one/two/three/

--max-files=3

only return matches for the first three matching files (in the current --sort order)

--ignore-files

obey .gitignore rules in recursive searches

--exclude-fs=PATH

do not search the file system associated with PATH (a mounted directory or mount point)

--exclude-fs

only descend into the file systems associated with the specified file and directory search targets, exclude all other

--include-fs=.

only search the file system associated with . (. is the PATH), i.e. ignores all mounted and special devices

--exclude-from=FILE

do not search the files and directories specified as globs in FILE, see also ug --help globs

--include-from=FILE

only search the files and directories specified as globs in FILE, see also ug --help globs

--filter="COMMANDS"

filter files first before searching them by executing a utility on a file based on its type, see also ug --help filter

Usage tips:

1. to let ug ignore binary files by default, add ignore-binary to your ~/.ugrep file
2. to let ug obey .gitignore rules in recursive searches by default, add ignore-files to your ~/.ugrep file

Formatted output

--csv

CSV output format

--json

JSON output format

--xml

XML output format

--format="FORMAT"

custom output formatting, see also ug --help format

Usage tips:

1. formatting can be combined with other options, such as -n to include line numbers
2. see custom output formatting for a list of format fields to specify in a --format="FORMAT" argument

Pretty things, more or less

--pretty

enable -n, -T, --color, --tree, --heading, --break and --sort when output is sent to a terminal

--tree

list files in a directory tree for options -l and -c

--heading

output the file name as a heading of a matching file

--break

output an empty line between matching files

-T

tabulate line and column numbers to add spacing

--color

colorize the output when displayed on a terminal (default)

--colors=COLORS

specify a color pallette COLORS, see also ug --help colors

--hyperlink=+

embed hyperlinks in the output when sent to a terminal, with linked line/column numbers when =+ is specified

--pager

output to a pager, default is more or less

--pager=COMMAND

output to COMMAND as a pager

--tag

output matches as ___match___ instead of colorizing them, where --tag=TAG,TAG outputs TAGmatchTAG

--replace="FORMAT"

replace matches in the output by FORMAT, see also ug --help format

--separator=SEP

specify SEP to separate line and column numbers from the match

--group-separator=SEP

specify SEP to separate context for options -ABC

--width

truncate lines to the terminal window width; --width=40 truncates to 40 characters

Usage tips:

1. ug enables --pretty and --sort by default
2. ugrep only enables --color by default

Getting help

--help WHAT

display help on WHAT you are looking for

--help count

display help on option -c (or --count) and -m [MIN,][MAX] (or --min-count=MIN, --max-count=MAX)

--help regex

display help with details on regex patterns

--help globs

display help with details on glob patterns, e.g. for option -g

Regex

1. ERE (Extended Regular Expression) syntax is the default in ugrep (shown in the table), like GNU egrep or grep -E
2. ERE syntax is also used with option -P for PCRE (Perl regular expressions), adding lookaround and group capture patterns
3. BRE (Basic Regular Expression) syntax with option -G requires the \-escaped syntax \| for |, \+ for +, \? for ?, \( \) for ( ), and \{ \} for { }
4. option -U disables Unicode in regex patterns and speeds up searching; patterns such as \xa3 match a byte, not the U+00a3 multi-byte code point
5. character classes such as \s and negated classes such as [^abc-e] never match a newline \n which is implicitly removed for grep compatibility
6. explicitly specify a \n or a \R in a pattern such as "go[\s\n]up" to match multiple lines as a single match
7. mutiple classes are combined in a single bracket list, such as [.[:xdigit:]\s] to combine . wtih hexadecimal digits and space
8. subtract classes in a bracket list with [\w--[\d]] or intersect classes in a bracket list with [\w&&[\d]] which is just \d
9. for \p{Class} (match one character in Class) and for \P{Class} (match one character not in Class) a Unicode Class is one of:

Globs

Ugrep supports gitignore-style globbing for all glob-related options -g, --iglob=, --exclude=, --include=, -include-dir=, --exclude-dir=, --include-from=, --exclude-from=, and --ignore-files, where

1. to prevent the shell from expanding globs, you must quote globs like "*.cpp" in command-line options such as -g"*.cpp",
2. a glob pattern starting with a ^ or a ! inverts matching: instead of matching a filename or directory name, the directory or file is ignored and excluded from the search
3. when a glob pattern contains a /, the full pathname is matched, otherwise, the basename of a file or directory is matched in recursive searches
4. when a glob pattern starts with a /, the glob matches files and directories from the working directory path, not recursively
5. when a glob pattern ends with a /, the glob matches directories, not files

File types

The -t or --file-type= argument is a comma-separated list of file types. A file type is associated with one or more filename extensions, internally using option -O to match filename extensions. For capitalized file types, the search is expanded to include files with matching file signature magic bytes, internally using option -M. When a type is preceded by a ! or a ^, excludes files of the specified type.

Filters

A filter utility is associated with one or more filename extensions using the syntax --filter="ext1,ext2,ext3:command". When a filename extension matches a specified filter filename extension ext, then the filter command is executed on the file and the command output is searched instead of the file. Arguments to the specified command may be included and seperated by space. The special command argument % is expanded into the pathname of the file. A command should read the file given by the expanded pathname argument or read the file that is opened as standard input to the command. A wildcard * matches any extension that is not matched by any of the ext specified (matching is case sensitive). Some examples:

--filter="pdf:pdftotext % -"

search PDF files, like ug+

--filter="doc:antiword %"

search documents, like ug+

--filter="odt,docx,epub,rtf:pandoc --wrap=preserve -t plain % -o -"

search documents and e-books, like ug+

--filter="gif,jpg,jpeg,mpg,mpeg,png,tiff:exiftool %"

search image metadata, like ug+

--filter="odt,doc,docx,rtf,xls,xlsx,ppt,pptx:soffice --headless --cat %"

search documents, spreadsheets and presentations (this is slow)

--filter="pem:openssl x509 -passin pass: -text -in %,cer,crt,der:openssl x509 -passin pass: -text -inform der -in %"

search .pem, .cer, .crt and .der certificates

--filter="jis:iconv -f SHIFT-JIS -t UTF-8"

search .jis files encoded in Shift-JIS format converted to UTF-8

--filter="o,a,so:nm -gU %"

search object files and libraries for defined symbols

--filter="*:file %"

search the file type info of every file using the file utility

1. this option is not yet available for the Windows version of ugrep until ugrep 7.1 is released
2. a filter utility should be a command that produces standard output (to search)
3. instead of a filename extension alone, it is also possible to specify a file's "magic bytes" regex pattern with --filter-magic-label="LABEL:MAGIC" to associate the MAGIC regex pattern when found at the start of a file with a LABEL to be used as a filename extension in a --filter="LABEL:command"
4. UTF-8, UTF-16 and UTF-32 input is automatically searched and does not require a filter
5. the Shift-JIS conversion in the example is a special case, option --encoding= supports the arguments binary, ASCII, UTF-8, UTF-16, UTF-16BE, UTF-16LE, UTF-32, UTF-32BE, UTF-32LE, LATIN1, ISO-8859-1, ISO-8859-2, ISO-8859-3, ISO-8859-4, ISO-8859-5, ISO-8859-6, ISO-8859-7, ISO-8859-8, ISO-8859-9, ISO-8859-10, ISO-8859-11, ISO-8859-13, ISO-8859-14, ISO-8859-15, ISO-8859-16, MAC, MACROMAN, EBCDIC, CP437, CP850, CP858, CP1250, CP1251, CP1252, CP1253, CP1254, CP1255, CP1256, CP1257, CP1258, KOI8-R, KOI8-U, KOI8-RU

Colors

The --colors= argument is a colon-separated list of parameters, such as --colors=sl=hy:mt=hyB, where

Multiple SGR codes may be specified for a single parameter when separated by a semicolon, for example --colors="mt=1;31" specifies bright red. For quick and easy color specification, the corresponding single-letter color names may be used in place of numeric SGR codes and semicolons are not required to separate color names, for example --colors=mt=hr specifies bright red. Color letters and numeric codes may be mixed. The following SGR codes have corresponding letter designations:

The default color scheme is cx=33: mt=1;31: fn=1;35: ln=1;32: cn=1;32: bn=1;32: se=36: qp=1;32: qe=1;37;41: qm=1;32: ql=36: qb=1;35  

Custom output formatting

Formatted output and match replacement puts you in full control of the output. In fact, CSV (--csv), JSON (--json) and XML (--xml) are all produced this way. To produce custom output, specify option --format="FORMAT" with text and the following format fields:

1. options -X and -W change the %o and %O fields to output hex and hex/text, respectively.
2. option -o changes the %O and %Q fields to output the match only
3. options -c, -l and -o change the output of %C, %J, %V, %X and %Y accordingly
4. conditional fields such as %B, %F, %K and %N output the separator : after the value, or the separator text assigned with %[...]$
5. numeric fields such as %n are left-padded with spaces when %{width}n is specified for width > 0
6. matching line fields such as %O are cut to width when %{width}O is specified or when %{-width}O is specified to cut from the end of the line
7. character context on a matching line before or after a match is output when %{-width}o or %{+width}o is specified for match fields such as %o, where %{width}o without a +/- sign cuts the match to the specified width

Table of all options that accept format fields:

1. output for --csv is internally produced with

   --format-open='%+'
   --format='%[,]$%H%N%K%B%V%~%u'
   

2. output for --json is internally produced with

   --format-begin='['
   --format-open='%,%~  {%~    %[,%~    ]$%["file": ]H"matches": ['
   --format='%,%~      { %[, ]$%["line": ]N%["column": ]K%["offset": ]B"match": %J }%u'
   --format-close='%~    ]%~  }'
   --format-end='%~]%~'
   

3. output for --xml is internally produced with

   --format-begin='<grep>%~'
   --format-open='  <file%["]$%[ name="]I>%~'
   --format='    <match%["]$%[ line="]N%[ column="]K%[ offset="]B>%X</match>%~%u'
   --format-close='  </file>%~'
   --format-end='</grep>%~'
   

4. to output replaced matches in a file while keeping the rest of the file unchanged, use option --replace="FORMAT" and -y (or --any-line or --passthru)
5. to replace matches with corresponding text substitutions, you can use -P "(PATTERN1)|(PATTERN2)|...|(PATTERNn)" --replace="%[TEXT1|TEXT2|...|TEXTn]g" for example -P -iw "(one)|(two)|(three)" --replace="%[ūnum|duo|tria]g"

Indexing

The ugrep-indexer command indexes a directory tree to accelerate searching slow file systems and file systems that are "cold" i.e. not recently cached in memory. Indexing accelerates recursive searching by performing a quick check on precomputed indexes to only search those files that may match.

Indexed-based search with ugrep is safe and never skips new or updated files that may now match. If any files and directories are added or changed after indexing, then ugrep will search these additions and changes made to the file system by comparing file and directory time stamps to the indexing time stamp. When many files were added or changed, then you may want to re-index to bring the indexes up to date. Re-indexing is incremental, it will not take as much time as the initial indexing process.

Please note that indexing is effective for large file systems on slower storage media or when searching many zip and tarball archives. Indexing won't speed up regular file searching on fast nVME SSDs, for example.

ugrep-indexer -Iz -v

recursively (re-)index the working directory tree, ignore binary files (option -I), index archives and compressed files (option -z), showing verbose output (option -v)

ugrep-indexer -Iz -v PATH

same as above, but (re-)index the specified directory tree PATH

ugrep-indexer -f -0 -Iz -v PATH

force full re-indexing with lowest index match accuracy to minimize index files (option -0 for zero, default is -5 for five)

ugrep-indexer -c PATH

check the directory tree PATH indexes, the default is to check the working directory tree

ugrep-indexer -d PATH

delete the hidden index files from the directory tree PATH, the default is to delete index files from the working directory tree

ug --index -Iz OPTIONS PATTERN

perform an index-based recursive search, ignore binary files (option -I), also search archives and compressed files (option -z)

ug --index -r -Iz OPTIONS PATTERN PATH

same as above, but perform an index-based recursive search on the specified directory tree PATH

ug --index OPTIONS PATTERN FILE

search FILE, but not using an index (only recursive searching is accelerated)

Usage tips:

1. ugrep-indexer reads a .ugrep-indexer configuration file when present in the working directory or in your home directory, which should list the names of long options (without the --) to set your preferences
2. ugrep-indexer option -v reports progress; to create a log, redirect ugrep-indexer -v output to a log file
3. ugrep-indexer option -S follows symlinks to files; indexing never follows symlinks to directories
4. ugrep-indexer option -X or --ignore-files obeys .gitignore rules
5. ugrep-indexer options -z --zmax=2 indexes nested archives and tarballs (two levels)
6. ug option --index works with all other search options, except for options -P, -Z, -v and --filter
7. ug option --stats reports index-based search details, including false positives; false positives are reduced with higher indexing accuracy and/or by using more specific search patterns

Bugs

If you found a bug or an issue, then please report it at https://github.com/Genivia/ugrep/issues  

License

Ugrep is open source BSD-3 licensed:

Ugrep is written by Robert A. van Engelen, Copyright (c) 2024 Robert A. van Engelen, Genivia Inc.

The ugrep author received the 🏆 Google Peer Bonus Award 2022 for developing ugrep

Ugrep project repo: https://github.com/Genivia/ugrep ⭐️ thank you for starring the project!

Ugrep uses the RE/flex regex library: https://github.com/Genivia/RE-flex

Ugrep option -P uses the PCRE2 library: https://www.pcre.org

See also: gnu grep, bsd grep, git grep, pcre grep, agrep, ack, ag, rg, sift

Last updated: Wed Nov 20, 2024