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annotate util/xtemplate.lua @ 14016:1df1782ccdfe

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prosodyctl shell: Improve process exit codes This fixes a bug introduced in 3326c8a29a86 where prosodyctl shell would always exit with non-zero error codes, even on success. Now it will exit with 0 for success, or 1 if any errors were printed. It also updates the other exit codes in the shell command to help distinguish between different error cases. These are based on the sysexits.h codes, although it is not recommended to rely on that interface.
author Matthew Wild <mwild1@gmail.com>
date Fri, 19 Dec 2025 15:32:26 +0000
parents 0f7e7311eebf
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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dc9d63166488 util.xtemplate: Yet another string template library
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1 local s_gsub = string.gsub;
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2 local s_match = string.match;
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3 local s_sub = string.sub;
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4 local t_concat = table.concat;
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5
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6 local st = require("prosody.util.stanza");
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7
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8 local function render(template, root, escape, filters)
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9 escape = escape or st.xml_escape;
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10
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11 return (s_gsub(template, "(%s*)(%b{})(%s*)", function(pre_blank, block, post_blank)
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12 local inner = s_sub(block, 2, -2);
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13 if inner:sub(1, 1) == "-" then
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14 pre_blank = "";
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15 inner = inner:sub(2);
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16 end
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17 if inner:sub(-1, -1) == "-" then
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18 post_blank = "";
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19 inner = inner:sub(1, -2);
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20 end
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21 local path, pipe, pos = s_match(inner, "^([^|]+)(|?)()");
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22 if not (type(path) == "string") then return end
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23 local value
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24 if path == "." then
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25 value = root;
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26 elseif path == "#" then
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27 value = root:get_text();
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28 else
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29 value = root:find(path);
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30 end
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31 local is_escaped = false;
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32
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33 while pipe == "|" do
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34 local func, args, tmpl, p = s_match(inner, "^(%w+)(%b())(%b{})()", pos);
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35 if not func then func, args, p = s_match(inner, "^(%w+)(%b())()", pos); end
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36 if not func then func, tmpl, p = s_match(inner, "^(%w+)(%b{})()", pos); end
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37 if not func then func, p = s_match(inner, "^(%w+)()", pos); end
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38 if not func then break end
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39 if tmpl then tmpl = s_sub(tmpl, 2, -2); end
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40 if args then args = s_sub(args, 2, -2); end
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41
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42 if func == "each" and tmpl then
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43 if not st.is_stanza(value) then return pre_blank .. post_blank end
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44 if not args then value, args = root, path; end
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45 local ns, name = s_match(args, "^(%b{})(.*)$");
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46 if ns then
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47 ns = s_sub(ns, 2, -2);
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48 else
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49 name, ns = args, nil;
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50 end
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51 if ns == "" then ns = nil; end
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52 if name == "" then name = nil; end
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53 local out, i = {}, 1;
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54 for c in (value):childtags(name, ns) do out[i], i = render(tmpl, c, escape, filters), i + 1; end
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55 value = t_concat(out);
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56 is_escaped = true;
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57 elseif func == "and" and tmpl then
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58 local condition = value;
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59 if args then condition = root:find(args); end
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60 if condition then
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61 value = render(tmpl, root, escape, filters);
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62 is_escaped = true;
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63 end
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64 elseif func == "or" and tmpl then
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65 local condition = value;
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66 if args then condition = root:find(args); end
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67 if not condition then
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68 value = render(tmpl, root, escape, filters);
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69 is_escaped = true;
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70 end
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71 elseif filters and filters[func] then
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72 local f = filters[func];
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73 value, is_escaped = f(value, args, tmpl);
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74 else
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75 error("No such filter function: " .. func);
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76 end
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77 pipe, pos = s_match(inner, "^(|?)()", p);
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78 end
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79
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80 if type(value) == "string" then
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81 if not is_escaped then value = escape(value); end
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82 return pre_blank .. value .. post_blank
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83 elseif st.is_stanza(value) then
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84 value = value:get_text();
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85 if value then return pre_blank .. escape(value) .. post_blank end
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86 end
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87 return pre_blank .. post_blank
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88 end))
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89 end
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90
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91 return { render = render }