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NAME |
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Urlader - installer-less single-file independent executables |
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SYNOPSIS |
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use Urlader; |
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DESCRIPTION |
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Urlader (that's german for "bootloader" btw.) was created out of |
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frustration over PAR again not working, again not being flexible enough |
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for simple things, and again causing mysterious missing files issues on |
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various platforms. |
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That doesn't mean this module replaces PAR, in fact, you should stay |
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with it for many reasons, user-friendlyness is one of them. |
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However, if you want to make single-file distributions out of your perl |
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programs (or python, or C or whatever), and you are prepared to fiddle a |
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LOT, this module might provide a tiny step towards your goal. Well, if |
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it ever gets finished. |
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Also, *nothing in this module is considered very stable yet*, and it's |
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far from feature-complete. |
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Having said all that, Urlader basically provides three services: |
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A simple archiver that packs a directory tree into a single file. |
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A small C program that works on windows and unix, which unpacks an |
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attached archive and runs a program. |
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A perl module support module (*this one*), that can be used to query the |
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runtime environment, find out where to install updates and so on. |
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EXAMPLE |
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How can it be used to provide single-file executables? |
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So simple, create a directory with everything that's needed, e.g.: |
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# find bintree |
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bintree/perl |
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bintree/libperl.so.5.10 |
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bintree/run |
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bintree/pm/Guard.pm |
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bintree/pm/auto/Guard/Guard.so |
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# cat bintree/run |
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@INC = ("pm", "."); # "." works around buggy AutoLoader |
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use Guard; |
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guard { warn "hello, world!\n" }; # just to show off |
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exit 0; # tell the urlader that everything was fine |
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Then pack it: |
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# wget http://urlader.schmorp.de/prebuilt/1.0/linux-x86 |
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# urlader-util --urlader linux-x86 --pack myprog ver1_000 bintree \ |
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LD_LIBRARY_PATH=. ./perl run \ |
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>myprog |
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# chmod 755 myprog |
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CONCEPTS |
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urlader |
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A small (hopefully) and relatively portable (hopefully) binary that |
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is prepended to a pack file to make it executable. |
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You can build it yourself from sources (see prebuilt/Makefile in the |
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distribution) or use one of the precompiled ones at: |
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http://urlader.schmorp.de/prebuilt/1.0/ |
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The README there has further information on the binaries provided. |
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exe_id |
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A string that uniquely identifies your program - all branches of it. |
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It must consist of the characters "A-Za-z0-9_-" only and should be a |
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valid directory name on all systems you want to deploy on. |
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exe_ver |
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A string the uniquely identifies the contents of the archive, i.e. |
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the version. It has the same restrictions as the "exe_id", and |
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should be fixed-length, as Urlader assumes lexicographically higher |
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versions are newer, and thus preferable. |
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pack file (archive) |
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This contains the "exe_id", the "exe_ver", a number of environment |
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variable assignments, the program name to execute, the initial |
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arguments it receives, and finally, a list of files (with contents |
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:) and directories. |
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override |
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FUNCTIONS AND VARIABLES IN THIS MODULE |
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AUTHOR |
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Marc Lehmann <schmorp@schmorp.de> |
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http://home.schmorp.de/ |
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