[Enhancement proposal] Replacement Strings

[TonioGela]

I think that a feature like GNU parallel's replacement strings would be handy.

I was wondering something like:

foo := "A/B/C.D"

echo {{foo.}}   // A/B/C   (Removes extension)
echo {{foo/}}   // C.D     (Removes the path)
echo {{foo//}}  // A/B     (Keeps the path only)
echo {{foo/.}}  // C       (Removes path and extension)

What do you think @casey?

I'm terribly sorry since I don't know Rust enough to contribute by myself and that's why this is an issue and not a PR. If I'll spot the parser I'll begin to do some test.

[casey]

I definitely think this could be useful. Just already has some built-in functions, so it would be easy to create new ones that performed these operations:

foo := "A/B/C.D"

echo {{without_extension(foo)}} // A/B/C   (Removes extension)
echo {{file_name(foo)}}         // C.D     (Removes the path)
echo {{directory(foo)}}         // A/B     (Keeps the path only)
echo {{file_stem(foo)}}         // C       (Removes path and extension)

Rust has a bunch of path operations in the standard library which could be used in the implementation, so it wouldn't be necessary to write them from scratch.

[TonioGela]

Hmm, sounds interesting, I'll give it a try