cpanplus::internals::extract.3

视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.

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.\" ========================================================================
.\"
.IX Title "CPANPLUS::Internals::Extract 3"
.TH CPANPLUS::Internals::Extract 3 "2007-12-18" "perl v5.10.0" "Perl Programmers Reference Guide"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
CPANPLUS::Internals::Extract
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&    ### for source files ###
\&    $self\->_gunzip( file => \*(Aqfoo.gz\*(Aq, output => \*(Aqblah.txt\*(Aq );
\&    
\&    ### for modules/packages ###
\&    $dir = $self\->_extract( module      => $modobj, 
\&                            extractdir  => \*(Aq/some/where\*(Aq );
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
CPANPLUS::Internals::Extract extracts compressed files for \s-1CPANPLUS\s0.
It can do this by either a pure perl solution (preferred) with the 
use of \f(CW\*(C`Archive::Tar\*(C'\fR and \f(CW\*(C`Compress::Zlib\*(C'\fR, or with binaries, like
\&\f(CW\*(C`gzip\*(C'\fR and \f(CW\*(C`tar\*(C'\fR.
.PP
The flow looks like this:
.PP
.Vb 2
\&    $cb\->_extract
\&        Delegate to Archive::Extract
.Ve
.SH "METHODS"
.IX Header "METHODS"
.ie n .Sh "$dir\fP = _extract( module => \f(CW$modobj, [perl => '/path/to/perl', extractdir => '/path/to/extract/to', prefer_bin => \s-1BOOL\s0, verbose => \s-1BOOL\s0, force => \s-1BOOL\s0] )"
.el .Sh "\f(CW$dir\fP = _extract( module => \f(CW$modobj\fP, [perl => '/path/to/perl', extractdir => '/path/to/extract/to', prefer_bin => \s-1BOOL\s0, verbose => \s-1BOOL\s0, force => \s-1BOOL\s0] )"
.IX Subsection "$dir = _extract( module => $modobj, [perl => '/path/to/perl', extractdir => '/path/to/extract/to', prefer_bin => BOOL, verbose => BOOL, force => BOOL] )"
\&\f(CW\*(C`_extract\*(C'\fR will take a module object and extract it to \f(CW\*(C`extractdir\*(C'\fR
if provided, or the default location which is obtained from your 
config.
.PP
The file name is obtained by looking at \f(CW\*(C`$modobj\->status\->fetch\*(C'\fR
and will be parsed to see if it's a tar or zip archive.
.PP
If it's a zip archive, \f(CW\*(C`_\|_unzip\*(C'\fR will be called, otherwise \f(CW\*(C`_\|_untar\*(C'\fR
will be called. In the unlikely event the file is of neither format,
an error will be thrown.
.PP
\&\f(CW\*(C`_extract\*(C'\fR takes the following options:
.IP "module" 4
.IX Item "module"
A \f(CW\*(C`CPANPLUS::Module\*(C'\fR object. This is required.
.IP "extractdir" 4
.IX Item "extractdir"
The directory to extract the archive to. By default this looks 
something like:
    /CPANPLUS_BASE/PERL_VERSION/BUILD/MODULE_NAME
.IP "prefer_bin" 4
.IX Item "prefer_bin"
A flag indicating whether you prefer a pure perl solution, ie
\&\f(CW\*(C`Archive::Tar\*(C'\fR or \f(CW\*(C`Archive::Zip\*(C'\fR respectively, or a binary solution
like \f(CW\*(C`unzip\*(C'\fR and \f(CW\*(C`tar\*(C'\fR.
.IP "perl" 4
.IX Item "perl"
The path to the perl executable to use for any perl calls. Also used
to determine the build version directory for extraction.
.IP "verbose" 4
.IX Item "verbose"
Specifies whether to be verbose or not. Defaults to your corresponding
config entry.
.IP "force" 4
.IX Item "force"
Specifies whether to force the extraction or not. Defaults to your
corresponding config entry.
.PP
All other options are passed on verbatim to \f(CW\*(C`_\|_unzip\*(C'\fR or \f(CW\*(C`_\|_untar\*(C'\fR.
.PP
Returns the directory the file was extracted to on success and false
on failure.