Re: Relative Path

[Yermat <loic invalid fejoz net>]

Yermat wrote:
> Hi all,
>
> I want to create an rpm for a java program that is not from me because 
> one of my program depend on it.
>
> The problem I have is that I want to create an executable that call java 
> with the right classpath. Bascially I want :
> java -classpath  %{_javadir}/%{jarfile} -DLibrary-Path=\${TLAPATH} 
> tlc.TLC \$@
>
> The problem is that I want my package to be relocatable. I create the 
> executable in the %install section with a cat command. The best way 
> might be to find the relative path from %{_bindir}/tlc to 
> %{_javadir}/%{jarfile} but how can I do this ?

So I found a solution maybe you can comment on...
In the install section I just create empty file in order the package to 
register it.

%install
[...]
touch $RPM_BUILD_ROOT%{_bindir}/tlc
chmod a+x $RPM_BUILD_ROOT%{_bindir}/tlc

Then in the post section, I really create the content of the file by 
using the RPM_INSTALL_PREFIX variable.

%post
[...]
cat > ${RPM_INSTALL_PREFIX}/bin/tlc <<EOD
#!/bin/sh
if (! \$?TLAPATH) then
    export TLAPATH= ${RPM_INSTALL_PREFIX}/share/%{name}/StandardModules
endif
java -classpath ${RPM_INSTALL_PREFIX}/share/java/%{jarfile} 
-DLibrary-Path=\${TLAPATH} tlc.TLC \$@
EOD

I can see two problem with that.
The first one is that I need to rely on the definition of my macro 
%{bindir} to be %{_exec_prefix}/bin and %_exec_prefix  to be %{_prefix}.
Or have I an automatic solution to known the relation between %{bindir} 
and %{_prefix} (same for %{_datadir} and %{_javadir})?

The second one might happen if I want to sign the package. Wouldn't it 
say that the file has been modified by puting such things in the post 
section?

--
Yermat