How can I easily find all files necessary to run grub-install?

I need to merge grub-install(GRUB2) into a very stripped down and specialized copy of Linux we use at work.
grub-install is a script which calls a number of other things. Is there any way to monitor the run-process and log every file that gets touched?
jasonzxAsked:
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wesly_chenCommented:
It's a shell script.
run in verbose mode
# sh -x grub-install <option>  | grep "^+" > /tmp/gi.log
And go through /tmp/gi.log to see what command/log files it uses.

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jasonzxAuthor Commented:
That almost works but It outputs to the screen and the log file is empty :/
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wesly_chenCommented:
Woo, sh -x goes to STDERR
sh -x grub-install <option>  2>  /tmp/gi.log
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