Fetching and building dependencies automatically

[Brian Candler]

On Tue, Mar 06, 2007 at 04:10:21PM +0100, Matthias Saou wrote:
> Brian Candler wrote :
> 
> > Any pointers gratefully received.
> 
> You seem to be looking for mach :-)
> 
> If you're running any recent Fedora release, just "yum install mach",
> otherwise you can find more information here :
> http://thomas.apestaart.org/projects/mach/
> 
> Once set up, just "mach build foo.spec" and it'll download all sources
> for you and rebuild foo inside a chroot where it'll use yum to populate
> it with all build requirements.
> Then for "bar" which build requires "foo", "mach build bar.spec" will
> just work, installing the freshly built "foo" package.

I've just tried mach on a centos 4.4 box, but am having problems.

I built it using rpmbuild -tb mach-0.9.1.tar.bz2, then installed it using
rpm -Uvh (I first had to yum install createrepo as a dependency). My
~/.machrc is given below.

"mach setup build" worked fine, and "mach chroot" lets me go in there and
browse around (rpm -qa)

However, then I took a .spec file downloaded from freshrpms.net:

$ mach build /v/downloads/perl-SOAP-Lite.spec
Building .src.rpm from perl-SOAP-Lite.spec
Getting http://www.cpan.org/modules/by-module/SOAP/SOAP-Lite-0.69.tar.gz ...
Using /var/tmp/mach/tmp/centos-4-i386-extras/perl-SOAP-Lite-0.69-1/SOAP-Lite-0.69.tar.gz
Creating .src.rpm ....
Traceback (most recent call last):
  File "/usr/bin/mach", line 2444, in ?
    main (config, sys.argv[1:])
  File "/usr/bin/mach", line 2413, in main
    output = Root.__dict__[command] (root, args[1:])
  File "/usr/bin/mach", line 951, in build
    os.unlink (srpmfile)
OSError: [Errno 13] Permission denied: '/var/lib/mach/roots/centos-4-i386-extras/usr/src/rpm/SRPMS/perl-SOAP-Lite-0.69-1.src.rpm'

Retrying doesn't help:

$ mach unlock
$ mach clean
Cleaning out root ..........
$ mach build /v/downloads/perl-SOAP-Lite.spec
Preparing root
Installing package set 'minimal' .........
Installing package set 'base' ............
Installing package set 'build' ..........
Making snapshot ...
Building .src.rpm from perl-SOAP-Lite.spec
Using /var/tmp/mach/tmp/centos-4-i386-extras/perl-SOAP-Lite-0.69-1/SOAP-Lite-0.69.tar.gz
Creating .src.rpm ....
Traceback (most recent call last):
  File "/usr/bin/mach", line 2444, in ?
    main (config, sys.argv[1:])
  File "/usr/bin/mach", line 2413, in main
    output = Root.__dict__[command] (root, args[1:])
  File "/usr/bin/mach", line 951, in build
    os.unlink (srpmfile)
OSError: [Errno 13] Permission denied: '/var/lib/mach/roots/centos-4-i386-extras/usr/src/rpm/SRPMS/perl-SOAP-Lite-0.69-1.src.rpm'

So I commented out line 951 (os.unlink) - perhaps mach had forgotten to gain
privileges at this point. But then it fails with another permission problem:

$ mach unlock
$ mach build /v/downloads/perl-SOAP-Lite.spec
Building .src.rpm from perl-SOAP-Lite.spec
Using /var/tmp/mach/tmp/centos-4-i386-extras/perl-SOAP-Lite-0.69-1/SOAP-Lite-0.69.tar.gz
Creating .src.rpm ....
Rebuilding generated .src.rpm's:
- /var/tmp/mach/tmp/centos-4-i386-extras/perl-SOAP-Lite-0.69-1/perl-SOAP-Lite-0.69-1.src.rpm
Getting /var/tmp/mach/tmp/centos-4-i386-extras/perl-SOAP-Lite-0.69-1/perl-SOAP-Lite-0.69-1.src.rpm ...
Building source rpm perl-SOAP-Lite-0.69-1.src.rpm
ERROR: createrepo /var/lib/mach/roots/centos-4-i386-extras/usr/src/rpm/RPMS.mach-local failed
Traceback (most recent call last):
  File "/usr/bin/mach", line 2444, in ?
    main (config, sys.argv[1:])
  File "/usr/bin/mach", line 2413, in main
    output = Root.__dict__[command] (root, args[1:])
  File "/usr/bin/mach", line 956, in build
    self.rebuild (options + srpms)
  File "/usr/bin/mach", line 1229, in rebuild
    self.update_local_repo ()
  File "/usr/bin/mach", line 1026, in update_local_repo
    create_sources_list (self.config, srcs)
  File "/usr/bin/mach", line 2156, in create_sources_list
    raise Exception, "Could not update local yum repository"
Exception: Could not update local yum repository

So clearly something fundamental is wrong.

mach-helper appears to be correctly set up:

$ groups
ibn wheel mach
$ ls -l /usr/sbin/mach-helper
-rwsr-x---  1 root mach 8476 Mar  8 09:39 /usr/sbin/mach-helper
$

Any clues?

Thanks,

Brian.

--------- 8< ---------------------------------------------------------------
config['installer'] = 'yum'

config['files'] = {
  '/etc/hosts': '''
127.0.0.1 candlerb.london.example.com candlerb
localhost
''',
  '/etc/resolv.conf': '''
nameserver 10.1.1.50
nameserver 10.1.1.51
search maint.example.com
'''
}

config['defaultroot'] = 'centos-4-i386-extras'

config['macros'] = {
    'vendor':   'Example Company',
}