Tool to determine what files require what

[Orion Poplawski]

I'm packaging some software that provides interfaces for lots of 
different libraries and languages.  I'd like to split it up into 
sub-packages for the different components.  It would be useful to have a 
tool that would report a "requires" for each file in the package in 
order to "sort" them into the different sub-packages.

Any suggestions?

[Ian Pilcher]

Orion Poplawski wrote:
> I'm packaging some software that provides interfaces for lots of 
> different libraries and languages.  I'd like to split it up into 
> sub-packages for the different components.  It would be useful to have a 
> tool that would report a "requires" for each file in the package in 
> order to "sort" them into the different sub-packages.

If the files in question are binary executables or libraries, ldd should
do what you want.

[Orion Poplawski]

Ian Pilcher wrote:
> If the files in question are binary executables or libraries, ldd should
> do what you want.

Yeah, I was hoping for something a little more ready to go.  Does anyone 
know what script/process is run during the rpmbuild that generates the 
rpm dependecies, perhaps I can use/modify that...

[Panu Matilainen]

On Mon, 2005-08-08 at 10:14 -0600, Orion Poplawski wrote:
> Ian Pilcher wrote:
> > If the files in question are binary executables or libraries, ldd should
> > do what you want.
>
> Yeah, I was hoping for something a little more ready to go.  Does anyone 
> know what script/process is run during the rpmbuild that generates the 
> rpm dependecies, perhaps I can use/modify that...

That'd be /usr/lib/rpm/find-requires, it takes a list of filenames in
stdin and outputs the dependencies, eg
[pmatilai@weasel ~]$ echo /usr/bin/telnet | /usr/lib/rpm/find-requires
libc.so.6()(64bit)
libc.so.6(GLIBC_2.2.5)(64bit)
libc.so.6(GLIBC_2.3.4)(64bit)
libc.so.6(GLIBC_2.3)(64bit)
libncurses.so.5()(64bit)
libutil.so.1()(64bit)

..and then you can further process that if you want, with rpmquery or
repoquery where appropriate:
[pmatilai@weasel ~]$ echo /usr/bin/telnet | /usr/lib/rpm/find-requires|
xargs rpm -q --whatprovides|sort -u
glibc-2.3.5-10
ncurses-5.4-17

- Panu -

[Orion Poplawski]

Orion Poplawski wrote:
> Yeah, I was hoping for something a little more ready to go.  Does anyone 
> know what script/process is run during the rpmbuild that generates the 
> rpm dependecies, perhaps I can use/modify that...

Well, to answer my question, this basically does what I want:

#Requires
find $RPM_BUILD_ROOT -type f | while read file
do
    deps=`/usr/lib/rpm/rpmdeps -R $file`
    if [ -n "$deps" ]
    then
       echo -n "$file: " | sed s,$RPM_BUILD_ROOT,, >> ../requires
       echo $deps >> ../requires
    fi
done

Then with a simple perl script I can invert the list to files show per 
requirement.