Question

I’m trying to do this:

run "echo -n 'foo' > bar.txt"

and the contents of bar.txt ends up being:

-n foo \n

(With \n representing an actual newline)

I use run for other commands like rm -rf and, to my knowledge, it works fine.

Answer 1

I just found this in man echo:

Some shells may provide a builtin echo command which is similar or identical to this utility. Most notably, the builtin echo in sh(1) does not accept the -n option. Consult the builtin(1) manual page.

My version of bash has an echo builtin but seems to be respecting the -n flag. It looks like the shell on your deployment machine doesn’t, in which case using the full path to the echo binary might do what you want here:

run "/bin/echo -n 'foo' > bar.txt"