code: plan9front

ref: df04ea8d6c2e1e75307a77f2b086a836f480ab72
dir: /rc/bin/blogcom/

View raw version 
#!/bin/rc
if(~ $#1 0)
	file=/lib/blogcom
if not
	file=$1
awk ' BEGIN { w = 0; s = ""; nss = 0; srand() }
function ends() {
	ss[nss++] = s;
	s = "";
}
{
	split($0, a, "")
	for(i = 1; i <= length($0); i++){
		if(a[i] == "{"){
			w = 1;
			delete ws;
			nws = 0;
			ws[nws] = "";
		}
		else if(a[i] == "}"){
			nws++;
			s = s ws[int(rand()*nws)]
			w = 0;
		}
		else if(a[i] == "|"){
			if(w)
				ws[++nws] = "";
			else
				ends();
		}
		else if(w)
			ws[nws] = ws[nws] a[i];
		else{
			s = s a[i];
		}
	}
}
/[^|]$/ { if(w) ws[nws] = ws[nws] " "; else s = s " "; }
END { ends(); print ss[int(rand()*nss)] } ' $file | fmt