Re: Re: nested package dependencies

On Mon, 07 Feb 2005 12:42:47 -0500, Greg Beaver <cellog@php.net> wrote: > Andrew Nagy wrote: > > Hello all, I was wondering about the ability to have nested package > > dependencies? > > > > For example, the Structures_DataGrid package offers HTML output with the > > usage of the HTML_Table package in conjunction with output from Pager. > > However, If the user opts to not use the HTML output (for example they > > want to output the grid in excel), they do not need these 2 packages and > > are therefor listed as optional in the package.xml file. However, if I > > do use the HTML output, I MUST have Pager installed. > > > > So instead of having this: > > <dep type="pkg" rel="ge" version="1.2" > > optional="no">PEAR</dep> > > <dep type="pkg" rel="ge" version="1.5" > > optional="yes">HTML_Table</dep> > > <dep type="pkg" rel="ge" version="2.2.5" > > optional="yes">Pager</dep> > > > > I would like to be able to do something like this: > > > > <dep type="pkg" rel="ge" version="1.2" > > optional="no">PEAR</dep> > > <dep type="pkg" rel="ge" version="1.5" > > optional="yes">HTML_Table > > <dep type="pkg" rel="ge" version="2.2.5" > > optional="no">Pager</dep> > > </dep> > > > > If their is no current way to do this, could we implement a new version > > of the package XML to support this syntax, or a cleaner syntax might be: > > > > <dep type="pkg" rel="ge" version="1.2" > > optional="no" title="PEAR" /> > > <dep type="pkg" rel="ge" version="1.5" > > optional="yes" title="HTML_Table"> > > <dep type="pkg" rel="ge" version="2.2.5" > > optional="no" title="Pager" /> > > </dep> > > It's funny you should ask about this as PEAR 1.4.0a1 nears readiness :) > > I realized that this exact situation would be necessary sooner rather > than later, and this is the reason I implemented dependency groups in > package.xml 2.0. > > Dependencies in package.xml 2.0 are grouped slightly differently. There > are 3 kinds of dependencies. Required, optional, and optional groups. > The optional groups stick several dependencies together as if they were > a single dependency, so that you can install a single feature, such as > the HTML_Table/Pager feature. All packages have to list a minimum AND > mamximum required php version (use 6.0.0 if you're sure it works with > 5.x) and minimum required PEAR installer version (this one is so that > people can depend on a newer version of the installer without having to > have a package dependency on PEAR). > > <dependencies> > <required> > <php> > <min>4.2.0</min> > <max>6.0.0</max> > </php> > <pearinstaller> > <min>1.4.0a1</min> > </pearinstaller> > </required> > <group name="htmltable" hint="Paged output using HTML_Table"> > <package> > <name>HTML_Table</name> > <min>1.5</min> > </package> > <package> > <name>Pager</name> > <min>2.2.5</min> > </package> > </group> > </dependencies> > > To install, the user simply goes: > > $ pear install Structures_DataGrid#htmltable > > and even better, to uninstall both packages in this optional feature: > > $ pear uninstall Structures_DataGrid#htmltable > :-) I forgot about those features. I have to hand it to you. You've done a great job expanding and improving (and bugfixing :-)) the PEAR installer. My hat's off to you. -- Justin Patrin