Regarding to the R-bundle command 'Command Usage':

I find this idea very good, but it supposes that on every Mac 'texscan' is installed.

So here's my suggestion for it:

1)

I don't use Ruby, only Bash with a tiny Perl snippet. It is a bit faster.

2)

I'm looking for HTML files, not for tex files.

3)

It could happen that the structure of a help file is inconsistent, i.e. no 'Usage' header. If so, now it outputs the first 1100 character of the help as plain text. Maybe you find what do you are looking for.

4)

I suppressed the error messages coming from the 'find' command mentioning that there is no permission to do something.

Here the code:

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COM=`tail`

FILES=`find "${R_HOME:-/Library/Frameworks/R.framework/Resources}"/library -name $COM.html -print 2>/dev/null`

if [ ${#FILES} -eq 0 ]; then

echo "Nothing found for '$COM'"

exit_show_tool_tip

fi

for F in $FILES

do

cat "$F" | perl -e '$a="";while(<>){$a.=$_};$a=~m/<h3>Usage<\/h3\>[.|\n]+<pre>(.*?)<\/pre>/sim;if($1){print "Usage:\n".$1;}else{$a=~s/<.*?>//gms;$a=~s/\n{3,}/\n\n/gms;print substr($a,0,1100)."\n[...]"}'

done

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Any comments?