'^' matches newline at EOF

[pbsds]

The trailing newline is a posix standard, which the normal posix tools rightfully ignores. sd however seems not to.

pbsds@bjarte ~$ echo -e "1\n2\n3"  | sed -e 's/^/prefix-/'
prefix-1
prefix-2
prefix-3
pbsds@bjarte ~$ echo -e "1\n2\n3"  | sd '^' prefix-
prefix-1
prefix-2
prefix-3
prefix-

Version: sd 0.7.6

[xosxos]

The same goes for $. Also, it appears that sd cannot handle - as the first char of a string and it cannot be conveniently escaped either.

echo -e "1\n2\n3" | sd "$" "-suffix"

error: Found argument '-u' which wasn't expected, or isn't valid in this context

USAGE:
    sd <find> <replace-with> --string-mode

For more information try --help

Promising stuff with the benchmarks against sed, but it seems like the project is archived.

[pbsds]

The - is kind of expected, although a bit unintuitive. The common way for unix cli tools to escape positional arguments that happen to start with a - is to stop parsing flags altogether after --. This is likely a GNU invention.

$ echo -e "1\n2\n3" | sd -- "$" "-suffix"
1-suffix
2-suffix
3-suffix
-suffix