#!/usr/bin/awk

function which(c,path) {
	cmd = "test -x " c;

	if (system(cmd)==0) {
		return c;
	} 

	sub(/\/.*\//,"",c);
  for (dir in path) {
			cmd = "test -x " path[dir] "/" c;
			if (system(cmd)==0) {
					return path[dir] "/" c;
			} 
	}


	return c;
}

# used to replace "use lib utils.pm" with "use lib @libexecdir"
#
function led() {
	led1 = "@libexecdir@";
	led2 = "@exec_prefix@";
	led3 = "@prefix@";
	if ( match(led1, /^\$\{exec_prefix\}/ ) != 0 ) {
		return "\"" led3 "/libexec\" " ;
	
	}
	return "\"" led1 "\"" ;
}

BEGIN {
	split(ENVIRON["PATH"] ":/sbin:/usr/sbin",path,/:/);

}

# scripting language (first line)

/^#! ?\/.*\/python/ {sub(/^#! ?\/.*\/python/,"#! @PYTHON@");}
/^#! ?\/.*\/perl/ {sub(/^#! ?\/.*\/perl/,"#! @PERL@");}
/^#! ?\/.*\/[a-z]{0,2}awk/ {sub(/^#! ?\/.*\/[a-z]{0,2}awk/,"#! @AWK@");}
/^#! ?\/.*\/sh/ {sub(/^#! ?\/.*\/sh/,"#! @SHELL@");}

# add to libexecdir to INC for perl utils.pm
/^use/ { if (/lib/) { if (/utils.pm|"."/ ) {sub(/utils.pm|"."/,led() )} } }


# Replace the placeholders with the values from configure
/#PERL#/ {sub(/#PERL#/,"@PERL@");}
/#STATEFILES_DIR#/ {sub(/#STATEFILES_DIR#/,"@STATEFILES_DIR@");}
/#PACKAGE_VERSION#/ {sub(/#PACKAGE_VERSION#/,"@PACKAGE_VERSION@");}
/#STANDALONE#/ {sub(/#STANDALONE#/,"@STANDALONE@");}

{
	print;
}