I have a golang program that makes a simple repl for jq. I'd like to be able to read input from stdin at program start into a temporary file, so I can use the repl with piped input.
cat file.json | jqrepl
However, when I read from stdin, either using a scanner or a reader, I reach the EOF for stdin, and then I can no longer accept input from stdin for the main repl loop. Readline fails immediately because it's at EOF.
I've tried deferring a Reader.UnreadByte, Closing the scanner, and a multitude of "seek(0)", and other raw operations on stdin.
Is there a way to reset the stdin so that it can be read from again? Ideally I would read until EOF, save that to a temporary file, and then enter the repl mode.
Thanks!