Find/Replace special characters in text file using Bash script

debugcn Published at Dev

zotteken

I'm looking for some guidance on creating a script to find and replace special characters inside a text file.

I've come up with this piece of pseudo code but filling in the blanks is a bit harder:

Find newline & replace by space.
Find CP & replace by newline.
Find Mr. Mime (with space) & replace by Mr.Mime (without space)
Find tab & replace by space
Find double space & replace by single space
Find % & replace with nothing (aka just leave it out)
Find " ATK DEF STA IV " & replace by space

"Find" stands for "Find All Instances".

I've been looking into sed, but I can't seem to find how I'd handle these special characters. Any ideas much appreciated.

EDIT: As asked hereby an little snippet of the input:

CP 1593
SSS
Sudowoodo♀
ATK     DEF     STA     IV
15  15  15  100.0%
counter
rock slide
CP 1262
SSS
Tangrowth♀4
ATK     DEF     STA     IV
15  15  15  100.0%
vine whip
grass knot
CP 1077
SSS
Mr. Mime♀
ATK     DEF     STA     IV
15  15  15  100.0%
confusion
psychic

And the expected output:

1593 SSS Sudowoodo♀ 15 15 15 100.0 counter rock slide
1262 SSS Tangrowth♀4 15 15 15 100.0 vine whip grass knot
1077 SSS Mr.Mime♀ 15 15 15 100.0 confusion psychic

glenn jackman

sed text process is strictly line oriented, so it's pretty difficult to replace newlines with sed.
Untested:

cat file |
  tr '\n\t' '  ' |
  sed -e 's/ CP /\n/g' \
      -e 's/Mr[.] Mime/Mr.Mime/g' \
      -e 's/   */ /g' \
      -e 's/%//g'

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edited at2021-07-22

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