ExecForEach

[bitfield]

Equivalent to shell xargs. For example, this use case: https://gist.github.com/Skraelingjar/9aabc58aa26f5b814411e69d67b342fe

[gagneet]

Would like to help out on this.

[bitfield]

Great! Thanks @gagneet. One thing you could do to get the ball rolling is to write a short script program, which assumes the existence of ExecForEach, or whatever we decide to name it, along the lines of the linked use case. Once we're happy with the design, we can then write a test for it.

[mainawycliffe]

I am thinking the func would look roughly something like this:

func (p *Pipe) Xargs(cmd ...string) *Pipe {
	// do something with the output of the previous command
}

or

func (p *Pipe) Xargs(cmd string) *Pipe {
	// do something with the output of the previous command
}

This would take a Pipe and use its output to perform more commands. I am still thinking through, as I look to find more scenarios that the Xargs commands can be used in.

[mainawycliffe]

@bitfield what do you think?

[bitfield]

I think using ExecForEach should be more or less exactly like using Exec(), but with the addition of a placeholder value in the supplied command. In fact, why don't we use Go template syntax, which is even more powerful?

script.ListFiles("*.php").ExecForEach("php {{ . }}").Stdout()