Re: Warp: RSS Package Manager

2008/5/31 Isak Savo <[email protected]>:

> On Fri, May 30, 2008 at 3:12 PM, Neil Munro <[email protected]> wrote:
> > 2008/5/30 Isak Savo <[email protected]>:
> >>
> >> On Wed, May 28, 2008 at 2:22 PM, Neil Munro <[email protected]>
> wrote:
> >> >
> >> > 2008/5/28 Isak Savo <[email protected]>:
> >> >>
> >> In your case, you'd need to check that mono  exists and that its the
> >> correct version. We currently don't support this, but work has at
> >> least started ( http://trac.autopackage.org/wiki/PackagingMonoApps ).
> >
> > Looking at the quick start guide and I get to the binreloc stage is there
> a
> > C# mode for binreloc? I don't have any hard coded paths at the moment,
> > everything is all contained in a relative directory so I do even need to
> use
> > binreloc at this point?
>
> Yes, you need binreloc. As long as you rely on getting external files
> from the hard drive you'll need binreloc.
>
> I did actually write a C# version of binreloc a year ago or so, It's
> available here:
> http://isak.livejournal.com/11225.html
>
> Just grab the BinReloc.cs and include it in your project.
>
> The blog post contains a short example on how to use it.


Ok, I shall try this then :)

I imagine I'm going to get stuck further down the line though, so expect
more questions.


>
>
> >> Ok, I understand.
> >
> > Is that practice frowned upon? I'm learning to program all by myself
> without
> > any one really showing me better ways of doing things and best practice
> > methods and I would prefer to get things efficient and right if I can. So
> if
> > my work around is a bit nasty and hacky I'll move back to bitwise
> > operations. Can probably fix the dependency by checking if the system is
> a
> > unix one only then use Mono.Native.Unix.UnixFileProcess that works around
> > the dependency issue on windows.
>
> In C, you typically solve this using some abstraction layer, then
> using #ifdef and/or separate source files depending on platform your
> compiling on.
>
> So you'd perhaps have:
>
> bool change_permission(string file, string permission)
> {
> #ifdef UNIX
>   chmod(file, permission)
> #else if WINDOWS
>   ChangePermission(file, permission);
> #endif
> }


The code is used was this:
if ( Environment.OSVersion.ToString( ).ToLower( ).Contains( "unix" ) )
{
     string sArgs = "+x " + sFileName;

     Process pSetPermissions = new Process( );
     pSetPermissions.StartInfo.FileName = "chmod";
     pSetPermissions.StartInfo.Arguments = sArgs;

     pSetPermissions.Start( );
     pSetPermissions.WaitForExit( );
}

And I don't quite know how often yet it could be called.


>
>
> This can be done similarily in C# too, but then you'd need to compile
> once for each platform. Don't know if that's ok with you.
>
> It all depends on how frequently you need to do this kind of stuff in
> your code. If it was just one or a few places, I'd probably just do
> like you did and call an external program:
>
> System.Diagnostics.Process.Start("chmod", myFile + " " + myPermission);
>
> If it was a lot of things and used at many places in the code, I'd
> write an abstraction layer that took care of the platform specific
> details
>
> -Isak
>
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