sd - s[earch] & d[isplace]

sd is a simple, user-friendly find & replace command line tool.

Features

Painless regular expressions

Use regex syntax that you already know from JavaScript, Python, and Rust. No need to learn special syntax or eccentrisms of sed or awk. Easily access your captured groups with $1, $2.

String-literal mode

In string-literal mode, you don't need to escape any special characters - its simply unnecessary.

Easy to read, easy to write

Find & replace expressions are split up and in most cases unescaped, which contributes to readability and makes it easier to spot errors in your regexes.

Comparison to sed

While sed is frighteningly powerful, sd focuses on doing just one thing and doing it well.

Some cherry-picked examples, where sd shines:

• Replace newlines with commas:
  • sed: sed ':a;N;$!ba;s/\r/,/g' vs
  • sd: sd -r '\r' ','
• Extracting stuff out of strings with special characters
  • sd: echo "{((sample with /path/))}" | sd -r '\{\(\(.*(/.*/)\)\)\}' '$1'
  • sed
    • incorrect, but closest I could get after 15 minutes of struggle
    • echo "{((sample string also contains /path/))}" | sed 's/{((\.\*\(\/.*\/\)))}/\1/g'

Note: although sed has a nicer regex syntax with -r, it is not portable and doesn't work on, say, MacOS or Solaris.