tuc (when cut doesn't cut it)

You want to cut on more than just a character, perhaps using negative indexes or format the selected fields as you want... Maybe you want to cut on lines (ever needed to drop first and last line?)... That's where tuc can help.

Install

Download one of the prebuilt binaries

or run

cargo install tuc

Help

``` tuc 0.11.0 [UNRELEASED] Cut text (or bytes) where a delimiter matches, then keep the desired parts.

The data is read from standard input.

USAGE: tuc [FLAGS] [OPTIONS]

FLAGS: -g, --greedy-delimiter Match consecutive delmiters as if it was one -p, --compress-delimiter Print only the first delimiter of a sequence -s, --only-delimited Print only lines containing the delimiter -V, --version Print version information -z, --zero-terminated Line delimiter is NUL (\0), not LF (\n) -h, --help Print this help and exit -m, --complement Invert fields (e.g. '2' becomes '1,3:') -j, --(no-)join Print selected parts with delimiter inbetween

OPTIONS: -f, --fields Fields to keep, 1-indexed, comma separated. Use colon to include everything in a range. Fields can be negative (-1 is the last field). [default 1:]

                              e.g. cutting on '-' the string 'a-b-c-d'
                                1     => a
                                1:    => a-b-c-d
                                1:3   => a-b-c
                                3,2   => cb
                                3,1:2 => ca-b
                                -3:-2 => b-c

                              To re-apply the delimiter add -j, to replace
                              it add -r (followed by the new delimiter).

                              You can also format the output using {} syntax
                              e.g.
                              '["{1}", "{2}"]' => ["a", "b"]

                              You can escape { and } using {{ and }}.

-b, --bytes <bounds>          Same as --fields, but it keeps bytes
-c, --characters <bounds>     Same as --fields, but it keeps characters
-l, --lines <bounds>          Same as --fields, but it keeps lines
                              Implies --join. To merge lines, use --no-join
-d, --delimiter <delimiter>   Delimiter used by --fields to cut the text
                              [default: \t]
-e, --regex                   Use a regular expression as delimiter
-r, --replace-delimiter <new> Replace the delimiter with the provided text
-t, --trim <type>             Trim the delimiter (greedy). Valid values are
                              (l|L)eft, (r|R)ight, (b|B)oth

Options precedence: --trim and --compress-delimiter are applied before --fields or similar

Memory consumption: --characters and --fields read and allocate memory one line at a time

--lines allocate memory one line at a time as long as the requested fields
are ordered and non-negative (e.g. -l 1,3:4,4,7), otherwise it allocates
the whole input in memory (it also happens when -p or -m are being used)

--bytes allocate the whole input in memory

```

Examples

```sh

Cut and rearrange fields...

❯ echo "foo bar baz" | tuc -d ' ' -f 3,2,1 bazbarfoo ```

```sh

...and apply back the delimiter...

❯ echo "foo bar baz" | tuc -j -d ' ' -f 3,2,1 baz bar foo ```

```sh

...or replace it

❯ echo "foo bar baz" | tuc -j -r ' ➡ ' -d ' ' -f 3,2,1 baz ➡ bar ➡ foo ```

```sh

Keep ranges

❯ echo "foo bar baz" | tuc -d ' ' -f 2: bar baz ```

```sh

Cut using a greedy delimiter

❯ echo "foo bar" | tuc -g -d ' ' -f 1,2 foobar ```

```sh

Format output

❯ echo "foo bar baz" | tuc -d ' ' -f '{1}, {2} and lastly {3}' foo, bar and lastly baz

Support \n

❯ echo "100Kb README.txt 2049-02-01" | tuc -d ' ' -f '{2}\n├── {1}\n└── {3}' README.txt ├── 100Kb └── 2049-02-01 ```

```sh

Cut lines (e.g. drop first and last line)

❯ printf "a\nb\nc\nd\ne" | tuc -l 2:-2 b c d ```

```sh

Concatenate lines

❯ printf "a\nb\nc\nd\ne" | tuc -l 1,2 --no-join ab ```

```sh

Compress delimiters after cut

❯ echo "foo bar baz" | tuc -d ' ' -f 2: -p bar baz ```

```sh

Replace remaining delimiters with something else

❯ echo "foo bar baz" | tuc -d ' ' -f 2: -p -r ' -> ' bar -> baz ```

```sh

Indexes can be negative and rearranged

❯ echo "a b c" | tuc -d ' ' -f -1,-2,-3 cba ```

```sh

Cut using regular expressions (requires a release with regex features enabled)

❯ echo "a,b, c" | tuc -e '[, ]+' -f 1,3 ac ```

```sh

Delimiters can be any number of characters long

❯ echo "abc" | tuc -d '' -f 1,3 ac ```

```sh

Cut characters (expects UTF-8 input)

❯ echo "😁🤩😝😎" | tuc -c 4,3,2,1 😎😝🤩😁 ```

```sh

Cut bytes (the following emoji are 4 bytes each)

❯ echo "😁🤩😝😎" | tuc -b 5:8 🤩 ```

```sh

Keep non-matching fields

❯ echo "a b c" | tuc --complement -d ' ' -f 2 ac ```

LICENSE

Tuc is distributed under the GNU GPL license (version 3 or any later version).

See LICENSE file for details.