Re: Test suites after build and Build-Depends.

[Charles Plessy <plessy@debian.org>]

Le Fri, Jan 30, 2009 at 09:00:46AM -0800, Russ Allbery a écrit :
> 
> What this is saying is that substvars will be expanded by those three
> programs when generating the *.dsc, the *.changes, and the binary control
> files.  However, while build dependency information is copied into the
> *.dsc file, my understanding is that it's not read from that file for
> package builds.  Build dependency information is read directly from
> debian/control and hence cannot get the benefit of any pre-processing of
> debian/control.  See dpkg-source(1) under the description of the -c
> option.

Hi Russ,

I am not sure I understand. From reading the man page of dpkg-source, it seems
to me that:

 - The 'control' file is used to generate the .dsc file.
 - The location of the 'control' file is debian/control by default, but this
   can be changed with the -c option.

I have not found evidence in the documentation nor in the source that the
building of the .dsc file is a two-step process as you describe.

aqwa『~』$ grep -A1 -B1 dsc /usr/bin/dpkg-source 

    # Write the .dsc
    my $dscname = $srcpkg->get_basename(1) . ".dsc";
    info(_g("building %s in %s"), $sourcepackage, $dscname);
    $substvars->parse($varlistfile) if $varlistfile && -e $varlistfile;
    $srcpkg->write_dsc(filename => $dscname,
		       remove => \%remove,
--
    unless (scalar(@ARGV)) {
	usageerr(_g("-x needs at least one argument, the .dsc"));
    }
--
    }
    my $dsc = shift(@ARGV);
    if (-d $dsc) {
	usageerr(_g("-x needs the .dsc file as first argument, not a directory"));
    }
--
    # Create the object that does everything
    my $srcpkg = Dpkg::Source::Package->new(filename => $dsc,
					    options => \%options);
--
        } else {
            warning(_g("extracting unsigned source package (%s)"), $dsc);
        }
--
Commands:
  -x <filename>.dsc [<output-dir>]
                           extract source package.
--
  -T<varlistfile>          read variables here, not debian/substvars.
  -D<field>=<value>        override or add a .dsc field and value.
  -U<field>                remove a field.


I still do not understand what makes it "nonsense" to use substvars for the
generation of the .dsc and .changes file.

Have a nice day,

-- 
Charles Plessy
Tsurumi, Kanagawa, Japan