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=head1 NAME |
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Urlader - installer-less single-file independent executables |
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=head1 SYNOPSIS |
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use Urlader; |
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=head1 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 with |
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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 it |
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ever gets finished. |
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Also, I<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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=over 4 |
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=item A simple archiver that packs a directory tree into a single file. |
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=item A small C program that works on windows and unix, which unpacks an attached |
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archive and runs a program. |
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=item A perl module support module (I<this one>), that can be used to query |
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the runtime environment, find out where to install updates and so on. |
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=back |
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=head1 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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=head1 CONCEPTS |
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=over 4 |
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=item urlader |
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A small (hopefully) and relatively portable (hopefully) binary that is |
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prepended to a pack file to make it executable. |
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You can build it yourself from sources (see F<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 F<README> there has further information on the binaries provided. |
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=item exe_id |
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A string that uniquely identifies your program - all branches of it. It |
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must consist of the characters C<A-Za-z0-9_-> only and should be a valid |
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directory name on all systems you want to deploy on. |
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=item exe_ver |
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A string the uniquely identifies the contents of the archive, i.e. the |
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version. It has the same restrictions as the C<exe_id>, and should be |
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fixed-length, as Urlader assumes lexicographically higher versions are |
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newer, and thus preferable. |
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=item pack file (archive) |
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This contains the C<exe_id>, the C<exe_ver>, a number of environment |
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variable assignments, the program name to execute, the initial arguments |
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it receives, and finally, a list of files (with contents :) and |
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directories. |
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=item override |
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=back |
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=head1 FUNCTIONS AND VARIABLES IN THIS MODULE |
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root |
1.1 |
=over 4 |
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=cut |
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package Urlader; |
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use common::sense; |
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BEGIN { |
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our $VERSION = '0.2'; |
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use XSLoader; |
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XSLoader::load __PACKAGE__, $VERSION; |
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} |
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our $URLADER_VERSION; # only ste when running under urlader |
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our $DATADIR; |
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our $EXE_ID; |
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our $EXE_VER; |
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our $EXE_DIR; # %AppData%/urlader/EXE_ID |
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our $EXECDIR; # %AppData%/urlader/EXE_ID/i-EXE_VER |
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sub _get_env { |
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$URLADER_VERSION = getenv "URLADER_VERSION"; |
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$DATADIR = getenv "URLADER_DATADIR"; |
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$EXE_ID = getenv "URLADER_EXE_ID"; |
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$EXE_VER = getenv "URLADER_EXE_VER"; |
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$EXE_DIR = getenv "URLADER_EXE_DIR"; # %AppData%/urlader/EXE_ID |
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$EXECDIR = getenv "URLADER_EXECDIR"; # %AppData%/urlader/EXE_ID/i-EXE_VER |
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} |
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_get_env; |
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sub set_exe_info($$) { |
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_set_datadir unless defined getenv "URLADER_DATADIR"; |
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&_set_exe_info; |
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_get_env; |
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} |
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1; |
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=back |
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=head1 AUTHOR |
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Marc Lehmann <schmorp@schmorp.de> |
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http://home.schmorp.de/ |
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=cut |
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