How to Add Multiple Prefix to Multiple Paths-CodePudding

I have two files one has urls like

https://example.com/
https://example2.com/
https://example3.com/

and other file has paths

abc efg xyz

I am looking for output to be like this

https://example.com/abc
https://example.com/efg
https://example.com/xyz
https://example2.com/abc
https://example2.com/efg
https://example2.com/xyz
https://example3.com/abc
https://example3.com/efg
https://example3.com/xyz

I have tried this command, but its only doing for first url only

awk 'NR==FNR{p=$0; next} {print p  $0}' dodo.txt xoxo.txt

sed 'r dodo.txt' xoxo.txt | sed -E 'N;s/(.)/(.)/\2\1/'

How can i do it with bash/sed or awk

CodePudding user response：

You can use awk in the following manner:

[user@host ~]$ awk 'NR==FNR { a[$0]; next } { for (i in a) print i $0 }' dodo.txt xoxo.txt
https://example.com/abc
https://example3.com/abc
https://example2.com/abc
https://example.com/efg
https://example3.com/efg
https://example2.com/efg
https://example.com/xyz
https://example3.com/xyz
https://example2.com/xyz

Which gives a slightly different order, but all the required lines. I personally prefer using join for this task because the syntax is simpler:

[user@host ~]$ join -j 2 dodo.txt xoxo.txt | sed -e "s/\s//g"
https://example.com/abc
https://example.com/efg
https://example.com/xyz
https://example2.com/abc
https://example2.com/efg
https://example2.com/xyz
https://example3.com/abc
https://example3.com/efg
https://example3.com/xyz

Piping into sed to remove all whitespace.

CodePudding user response：

You might use awk and first load the file with the paths to split on the fields separator if the file paths file only has a single line:

awk '
NR==FNR {
  nr = split($0,a,FS)
  next
}
{
  for (i = 1; i <= nr; i  ) {
    print $0 a[i]
  }
}
' paths.txt urls.txt

Output

https://example.com/abc
https://example.com/efg
https://example.com/xyz
https://example2.com/abc
https://example2.com/efg
https://example2.com/xyz
https://example3.com/abc
https://example3.com/efg
https://example3.com/xyz

If the paths file can have multiple lines, you can loop all the columns for all the path lines and add all the field values to an array which you can then loop for every url.

awk '
NR==FNR {
  for(i=1; i<=NF; i  ) {
    arr[  j] = $i
  }  
  next
}
{
  for (x = 1; x <= j; x  ) {
    print $0 arr[x]
  }
}
' paths.txt urls.txt