2 //////////////[copy starting here...]//////////////
4 // huffware script: auto-retire, by fred huffhines, version 2.8.
5 // distributed under BSD-like license.
6 // !! keep in mind that this code must be *copied* into another
7 // !! script that you wish to add auto-retirement capability to.
8 // when a script has auto_retire in it, it can be dropped into an
9 // object and the most recent version of the script will destroy
10 // all older versions.
12 // the version numbers are embedded into the script names themselves.
13 // the notation for versions uses a letter 'v', followed by two numbers
14 // in the form "major.minor".
15 // major and minor versions are implicitly considered as a floating point
16 // number that increases with each newer version of the script. thus,
17 // "hazmap v0.1" might be the first script in the "hazmap" script continuum,
18 // and "hazmap v3.2" is a more recent version.
20 // example usage of the auto-retirement script:
23 // auto_retire(); // make sure newest addition is only version of script.
26 // this script is partly based on the self-upgrading scripts from markov brodsky
27 // and jippen faddoul.
30 string self = llGetScriptName(); // the name of this script.
31 list split = compute_basename_and_version(self);
32 if (llGetListLength(split) != 2) return; // nothing to do for this script.
33 string basename = llList2String(split, 0); // script name with no version attached.
34 string version_string = llList2String(split, 1); // the version found.
36 // find any scripts that match the basename. they are variants of this script.
37 for (posn = llGetInventoryNumber(INVENTORY_SCRIPT) - 1; posn >= 0; posn--) {
38 string curr_script = llGetInventoryName(INVENTORY_SCRIPT, posn);
39 if ( (curr_script != self) && (llSubStringIndex(curr_script, basename) == 0) ) {
40 // found a basic match at least.
41 list inv_split = compute_basename_and_version(curr_script);
42 if (llGetListLength(inv_split) == 2) {
43 // see if this script is more ancient.
44 string inv_version_string = llList2String(inv_split, 1); // the version found.
45 // must make sure that the retiring script is completely the identical basename;
46 // just matching in the front doesn't make it a relative.
47 if ( (llList2String(inv_split, 0) == basename)
48 && ((float)inv_version_string < (float)version_string) ) {
49 // remove script with same name from inventory that has inferior version.
50 llRemoveInventory(curr_script);
57 // separates the base script name and version number. used by auto_retire.
58 list compute_basename_and_version(string to_chop_up)
60 // minimum script name is 2 characters plus a version.
62 // find the last useful space and 'v' combo.
63 for (space_v_posn = llStringLength(to_chop_up) - 3;
64 (space_v_posn >= 2) && (llGetSubString(to_chop_up, space_v_posn, space_v_posn + 1) != " v");
66 // look for space and v but do nothing else.
68 if (space_v_posn < 2) return []; // no space found.
69 // now we zoom through the stuff after our beloved v character and find any evil
70 // space characters, which are most likely from SL having found a duplicate item
71 // name and not so helpfully renamed it for us.
73 for (indy = llStringLength(to_chop_up) - 1; indy > space_v_posn; indy--) {
74 if (llGetSubString(to_chop_up, indy, indy) == " ") {
75 // found one; zap it. since we're going backwards we don't need to
76 // adjust the loop at all.
77 to_chop_up = llDeleteSubString(to_chop_up, indy, indy);
80 string full_suffix = llGetSubString(to_chop_up, space_v_posn, -1);
81 // ditch the space character for our numerical check.
82 string chop_suffix = llGetSubString(full_suffix, 1, llStringLength(full_suffix) - 1);
83 // strip out a 'v' if there is one.
84 if (llGetSubString(chop_suffix, 0, 0) == "v")
85 chop_suffix = llGetSubString(chop_suffix, 1, llStringLength(chop_suffix) - 1);
86 // if valid floating point number and greater than zero, that works for our version.
87 string basename = to_chop_up; // script name with no version attached.
88 if ((float)chop_suffix > 0.0) {
89 // this is a big success right here.
90 basename = llGetSubString(to_chop_up, 0, -llStringLength(full_suffix) - 1);
91 return [ basename, chop_suffix ];
93 // seems like we found nothing useful.
98 //////////////[end of area to copy]//////////////
101 // this is how a user of the auto_retire script gets the retirement process
102 // to work. whenever the script goes into its default state, such as when dropped
103 // into an object, this function invocation makes sure that no earlier versions
104 // of our script are left in inventory.