GitHub - noborus/guesswidth: Guess the width (fwf) output without delimiters in commands that output to the terminal.

Overview

guesswidth guesses the column position for fixed-width formats(fwf).

The output of the ps command has no delimiters, making the values difficult to machine-readable. guesswidth guesses smarter than just space delimiters.

guesswidth is guessed based on the position of characters in the header. So having a header will give you better results.

Install command

There is also a guesswidth command.

go install github.com/noborus/guesswidth/cmd/guesswidth@latest

Guess the width output with no delimiters in the command.

$ ps
    PID TTY          TIME CMD
 302965 pts/3    00:00:12 zsh
 733211 pts/3    00:00:00 ps
 733212 pts/3    00:00:00 tee
 733213 pts/3    00:00:00 guesswidth

Split the output like this:

$ ps | guesswidth
    PID| TTY     |     TIME|CMD
 302965| pts/3   | 00:00:08|zsh
 539529| pts/3   | 00:00:00|ps
 539530| pts/3   | 00:00:00|guesswidth

It can be converted to csv.

$ ps | guesswidth csv
PID,TTY,TIME,CMD
302965,pts/3,00:00:12,zsh
733211,pts/3,00:00:00,ps
733212,pts/3,00:00:00,tee
733213,pts/3,00:00:00,guesswidth

ps | guesswidth --align
   PID|TTY  |    TIME|CMD
302965|pts/3|00:00:12|zsh
733211|pts/3|00:00:00|ps
733212|pts/3|00:00:00|tee
733213|pts/3|00:00:00|guesswidth

Usage

$ guesswidth -h         [~/dev/src/github.com/noborus/guesswidth]
Guess the width of the columns from the header and body,
split them, insert fences and output.

Usage:
  guesswidth [flags]
  guesswidth [command]

Available Commands:
  completion  Generate the autocompletion script for the specified shell
  csv         Output in csv format
  help        Help about any command

Flags:
  -a, --align          align the output
      --fence string   fence (default "|")
      --header int     header line number (default 1)
  -h, --help           help for guesswidth
      --scannum int    number of line to scan (default 100)
      --split int      maximum number of splits (default -1)
  -v, --version        version for guesswidth

Use "guesswidth [command] --help" for more information about a command.

Examples

guesswidth inserts a delimiter (| by default) (Colors are changed here for clarity).

Even if there are spaces in the header or body, they will be separated correctly.

Overview

Install command

Usage

Examples

ps

docker ps

docker node