Check For An Executable
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Sometimes Vim needs to reach outside of itself to use an existing program. For example, wiring up requires Vim to call out to the binary.
We want our .vimrc
files and plugins to, generally, be as portable as possible. What happens if you haven't yet installed a particular program? Vim will likely experience a runtime exception. One way to get around this is to check for the presence of that program on the path. If it isn't there, don't do the thing. We can use the executable()
function for this.
It will return 1
(true) if prettier
is an executable on the path, otherwise it will return 0
(false).
See :help executable()
for more details.