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1 | NAME |
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2 | Urlader - installer-less single-file independent executables |
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3 | |
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4 | SYNOPSIS |
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5 | use Urlader; |
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6 | |
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7 | DESCRIPTION |
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8 | Urlader (that's german for "bootloader" btw.) was created out of |
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9 | frustration over PAR again not working, again not being flexible enough |
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10 | for simple things, and again causing mysterious missing files issues on |
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11 | various platforms. |
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12 | |
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13 | That doesn't mean this module replaces PAR, in fact, you should stay |
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14 | with it for many reasons, user-friendlyness is one of them. |
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15 | |
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16 | However, if you want to make single-file distributions out of your perl |
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17 | programs (or python, or C or whatever), and you are prepared to fiddle a |
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18 | LOT, this module might provide a tiny step towards your goal. Well, if |
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19 | it ever gets finished. |
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20 | |
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21 | Also, *nothing in this module is considered very stable yet*, and it's |
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22 | far from feature-complete. |
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23 | |
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24 | Having said all that, Urlader basically provides three services: |
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25 | |
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26 | A simple archiver that packs a directory tree into a single file. |
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27 | A small C program that works on windows and unix, which unpacks an |
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28 | attached archive and runs a program. |
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29 | A perl module support module (*this one*), that can be used to query the |
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30 | runtime environment, find out where to install updates and so on. |
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31 | |
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32 | EXAMPLE |
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33 | How can it be used to provide single-file executables? |
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34 | |
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35 | So simple, create a directory with everything that's needed, e.g.: |
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36 | |
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37 | # find bintree |
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38 | bintree/perl |
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39 | bintree/libperl.so.5.10 |
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40 | bintree/run |
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41 | bintree/pm/Guard.pm |
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42 | bintree/pm/auto/Guard/Guard.so |
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43 | |
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44 | # cat bintree/run |
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45 | @INC = ("pm", "."); # "." works around buggy AutoLoader |
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46 | use Guard; |
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47 | guard { warn "hello, world!\n" }; # just to show off |
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48 | exit 0; # tell the urlader that everything was fine |
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49 | |
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50 | Then pack it: |
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51 | |
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52 | # wget http://urlader.schmorp.de/prebuilt/1.0/linux-x86 |
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53 | # urlader-util --urlader linux-x86 --pack myprog ver1_000 bintree \ |
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54 | LD_LIBRARY_PATH=. ./perl run \ |
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55 | >myprog |
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56 | # chmod 755 myprog |
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57 | |
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58 | CONCEPTS |
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59 | urlader |
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60 | A small (hopefully) and relatively portable (hopefully) binary that |
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61 | is prepended to a pack file to make it executable. |
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62 | |
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63 | You can build it yourself from sources (see prebuilt/Makefile in the |
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64 | distribution) or use one of the precompiled ones at: |
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65 | |
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66 | http://urlader.schmorp.de/prebuilt/1.0/ |
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67 | |
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68 | The README there has further information on the binaries provided. |
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69 | |
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70 | exe_id |
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71 | A string that uniquely identifies your program - all branches of it. |
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72 | It must consist of the characters "A-Za-z0-9_-" only and should be a |
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73 | valid directory name on all systems you want to deploy on. |
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74 | |
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75 | exe_ver |
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76 | A string the uniquely identifies the contents of the archive, i.e. |
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77 | the version. It has the same restrictions as the "exe_id", and |
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78 | should be fixed-length, as Urlader assumes lexicographically higher |
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79 | versions are newer, and thus preferable. |
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80 | |
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81 | pack file (archive) |
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82 | This contains the "exe_id", the "exe_ver", a number of environment |
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83 | variable assignments, the program name to execute, the initial |
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84 | arguments it receives, and finally, a list of files (with contents |
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85 | :) and directories. |
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86 | |
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87 | override |
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88 | |
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89 | FUNCTIONS AND VARIABLES IN THIS MODULE |
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90 | AUTHOR |
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91 | Marc Lehmann <schmorp@schmorp.de> |
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92 | http://home.schmorp.de/ |
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93 | |
