I'm trying to write a bash script that takes an input stream and sorts lines containing a keyword to the top.
Starting point:
$ cat file
cat
dog
mouse
bird
cat and mouse
lorem
ipsum
Goal:
$ cat file | sort-by-keyword mouse
mouse
cat and mouse
cat
dog
bird
lorem
ipsum
I've tried to implement this using sort but failed. Is another tool/way I'm not aware of?
Using sed:
script file sort-by-keyword:
#!/bin/bash
input="$(cat)"
echo "$input" | sed "/$1/p;d"
echo "$input" | sed "/$1/!p;d"
Usage:
chmod +x sort-by-keyword
cat file | ./sort-by-keyword mouse
You can not sorting rest of the records. Based on input. please try
awk '{if ($0 ~ /mouse/) {print} else {a[NR]=$0}} END {for (i in a) print a[i]}'
Demo:
$cat file.txt
cat
dog
mouse
bird
cat and mouse
lorem
ipsum
$awk '{if ($0 ~ /mouse/) {print} else {a[NR]=$0}} END {for (i in a) print a[i]}' file.txt
mouse
cat and mouse
bird
lorem
ipsum
cat
dog
$
One dirty way to achieve it:
grep mouse file && grep -v mouse file
