util.startup: Check root after detecting platform and reading config (thanks SigmaTel71)
Ensures that startup.detect_platform() runs so know whether to use the
POSIX method of checking the current user or something else. Also after
reading the config so we know whether the root override setting is set.
local s_gsub = string.gsub;
local s_match = string.match;
local s_sub = string.sub;
local t_concat = table.concat;
local st = require("prosody.util.stanza");
local function render(template, root, escape, filters)
escape = escape or st.xml_escape;
return (s_gsub(template, "(%s*)(%b{})(%s*)", function(pre_blank, block, post_blank)
local inner = s_sub(block, 2, -2);
if inner:sub(1, 1) == "-" then
pre_blank = "";
inner = inner:sub(2);
end
if inner:sub(-1, -1) == "-" then
post_blank = "";
inner = inner:sub(1, -2);
end
local path, pipe, pos = s_match(inner, "^([^|]+)(|?)()");
if not (type(path) == "string") then return end
local value
if path == "." then
value = root;
elseif path == "#" then
value = root:get_text();
else
value = root:find(path);
end
local is_escaped = false;
while pipe == "|" do
local func, args, tmpl, p = s_match(inner, "^(%w+)(%b())(%b{})()", pos);
if not func then func, args, p = s_match(inner, "^(%w+)(%b())()", pos); end
if not func then func, tmpl, p = s_match(inner, "^(%w+)(%b{})()", pos); end
if not func then func, p = s_match(inner, "^(%w+)()", pos); end
if not func then break end
if tmpl then tmpl = s_sub(tmpl, 2, -2); end
if args then args = s_sub(args, 2, -2); end
if func == "each" and tmpl and st.is_stanza(value) then
if not args then value, args = root, path; end
local ns, name = s_match(args, "^(%b{})(.*)$");
if ns then
ns = s_sub(ns, 2, -2);
else
name, ns = args, nil;
end
if ns == "" then ns = nil; end
if name == "" then name = nil; end
local out, i = {}, 1;
for c in (value):childtags(name, ns) do out[i], i = render(tmpl, c, escape, filters), i + 1; end
value = t_concat(out);
is_escaped = true;
elseif func == "and" and tmpl then
local condition = value;
if args then condition = root:find(args); end
if condition then
value = render(tmpl, root, escape, filters);
is_escaped = true;
end
elseif func == "or" and tmpl then
local condition = value;
if args then condition = root:find(args); end
if not condition then
value = render(tmpl, root, escape, filters);
is_escaped = true;
end
elseif filters and filters[func] then
local f = filters[func];
if args == nil then
value, is_escaped = f(value, tmpl);
else
value, is_escaped = f(args, value, tmpl);
end
else
error("No such filter function: " .. func);
end
pipe, pos = s_match(inner, "^(|?)()", p);
end
if type(value) == "string" then
if not is_escaped then value = escape(value); end
return pre_blank .. value .. post_blank
elseif st.is_stanza(value) then
value = value:get_text();
if value then return pre_blank .. escape(value) .. post_blank end
end
return pre_blank .. post_blank
end))
end
return { render = render }