sak

README

sak - my Swiss Army Knife

This is a multi-tool in one fat binary. Should have no dependencies.

sak can execute sub-commands, with arguments, described below. Example:

printf 'a\tb\tc\n1\t2\t3\n' | sak tsv2csv
a,b,c
1,2,3

If the tool is linked to the name of a sub-command, it'll function as if that sub-command were invoked from the main script, i.e.

ln -s sak tsv2csv
printf 'a\tb\tc\n1\t2\t3\n' | ./tsv2csv
a,b,c
1,2,3

Tools might get added over time as I get around to it. Starting small for the moment, slowly adding ones I had lying around on a webapp somewhere so I can have them also available at the command line on most systems I have/use.

How to install

You can download a pre-packaged binary from the releases page, or use a tool such as ubi to fetch it and install it to your local $HOME/bin (assuming it's in your $PATH, it'll Just Work®).

$ ubi --project mfontani/sak --in "$HOME/bin"
$ sak --version
sak version v0.0.9

Subcommands

args - Shows arguments given

Synopsis: args [ARGUMENTS]

Prints the number of arguments on STDERR, followed by a possibly colored "dump" of each given argument on STDOUT. It highlights escape, backslash, space, tab, newline and return carriage.

If an argument contains non-basic runes (outside of 0x20-0x7e, 0x09, 0x0a, 0x0d and 0x1b, which are highlighted), it spits out one line per rune that comprises the full string argument, and "describes" them, showing its decimal and hex values, its name, and its properties.

Accepts no options other than --help.

csv2md - Converts a CSV to MarkDown

Synopsis: csv2md [INPUT_FILE|-] [OUTPUT_FILE|-]

Converts a CSV file into a MarkDown file. Defaults to getting input from STDIN and giving output to STDOUT. You can specify - for either INPUT_FILE or

OUTPUT_FILE to mean STDIN and STDOUT, respectively.

Accepts no options other than --help.

csv2tsv - Converts a CSV into a TSV

Synopsis: csv2tsv [INPUT_FILE|-] [OUTPUT_FILE|-]

Converts a CSV file into a TSV file. Defaults to getting input from STDIN and giving output to STDOUT. You can specify - for either INPUT_FILE or

OUTPUT_FILE to mean STDIN and STDOUT, respectively.

Accepts no options other than --help.

httpdumper - Sets up a HTTP dumper

Synopsis: httpdumper LISTEN_HOST LISTEN_PORT

Sets up a HTTP server on LISTEN_PORT, returning a text/plain response on every request, containing the request's details. Logs incoming requests' details to

STDOUT.

Accepts no options other than --help.

httproxy - Sets up a HTTP proxy

Synopsis: httproxy LISTEN_HOST LISTEN_PORT FWD_HOST FWD_PORT

Sets up a HTTP proxy on LISTEN_PORT, forwarding incoming HTTP requests to http://FWD_HOST:FWD_PORT. Logs and dumps incoming requests' details to STDOUT.

Accepts no options other than --help.

rune - Shows runes matching the arguments

Synopsis: rune [OPTIONS] ARGUMENT [ARGUMENT+]

Prints/describes the Unicode runes matching ARGUMENT. Optionally shows them.

Uses the "fixed" rune descriptions for control characters, and support font awesome runes as well.

ARGUMENT can be one of:

• a string, or a string starting with +, is used to restrict runes to the ones which contain ARGUMENT in their description, case insensitively
• a string starting with -, excludes runes whose description matches, case insensitively, ARGUMENT
• a string starting with / or with +/, the ARGUMENT is taken as a case insensitive regular expression and runes are output if they match it
• a string starting with -/, the ARGUMENT is taken as a case insensitive regular expression, and runes are excluded if they match it
• If only one ARGUMENT is given, and it matches a decimal number, then it displays information about the rune identified by that decimal number.
• If only one ARGUMENT is given, and it matches a hexadecimal number (starting with the string 0x), then it displays information about the rune identified by that hexadecimal number.

Options:

--help    Shows this help page
--show    Shows the rune character as well as its description

runes - Shows runes contained in the string arguments

Synopsis: runes ARGUMENT [ARGUMENT+]

Prints/describes the Unicode runes contained in each ARGUMENT.

Uses the "fixed" rune descriptions for control characters, and supports font awesome runes as well. Useful to identify presence of combining characters.

Accepts no options other than --help.

since - Shows days, months etc between dates

Synopsis: since START_DATE [END_DATE|TODAY]

Prints the amount of days, weeks, months years between START_DATE and END_DATE.

END_DATE defaults to today's date. Dates need to be given in YYYY-MM-DD format.

DWIMs if END_DATE is <= START_DATE.

Accepts no options other than --help.

stripansi - strips ansi from input

Synopsis: stripansi [INPUT_FILE|-] [OUTPUT_FILE|-]

Strips ANSI strings (i.e. \x1b[...m) from INPUT_FILE, and writes to OUTPUT_FILE.

Defaults to getting input from STDIN and giving output to STDOUT.

You can specify - for either INPUT_FILE or OUTPUT_FILE to mean STDIN and STDOUT, respectively.

Accepts no options other than --help.

tsv2csv - Converts a TSV into a CSV

Synopsis: tsv2csv [INPUT_FILE|-] [OUTPUT_FILE|-]

Converts a TSV file into a CSV file. Defaults to getting input from STDIN and giving output to STDOUT. You can specify - for either INPUT_FILE or

OUTPUT_FILE to mean STDIN and STDOUT, respectively.

Accepts no options other than --help.

tsv2md - Converts a TSV to MarkDown

Synopsis: tsv2md [INPUT_FILE|-] [OUTPUT_FILE|-]

Converts a TSV file into a MarkDown file. Defaults to getting input from STDIN and giving output to STDOUT. You can specify - for either INPUT_FILE or

OUTPUT_FILE to mean STDIN and STDOUT, respectively.

Accepts no options other than --help.

xsv2md - Converts a xSV to MarkDown

Synopsis: xsv2md SEPARATOR [INPUT_FILE|-] [OUTPUT_FILE|-]

Converts a xSV file into a MarkDown file. Requires a SEPARATOR to be given.

The SEPARATOR should be one-character, like $'\t' or ','.

Defaults to getting input from STDIN and giving output to STDOUT.

You can specify - for either INPUT_FILE or OUTPUT_FILE to mean STDIN and STDOUT, respectively.

Accepts no options other than --help.

yaml2json - Converts YAML to JSON

Synopsis: yaml2json [INPUT_FILE|-] [OUTPUT_FILE|-]

Converts YAML to JSON.

Defaults to getting input from STDIN and giving output to STDOUT. You can specify - for either INPUT_FILE or OUTPUT_FILE to mean STDIN and STDOUT, respectively.

Accepts no options other than --help.

yamlpretty - Pretty-prints YAML

Synopsis: yamlpretty [INPUT_FILE|-] [OUTPUT_FILE|-]

Pretty-prints YAML.

Defaults to getting input from STDIN and giving output to STDOUT. You can specify - for either INPUT_FILE or OUTPUT_FILE to mean STDIN and STDOUT, respectively.

Accepts no options other than --help.

LICENSE

Copyright 2023 Marco Fontani MFONTANI@cpan.org

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.