in reply to Re: Re: Re: Re: Re: simulating bash
in thread simulating bash

I think I've found the issue. The input contains:

SRC_URI="${SRC_PATH}/X${MY_SV}src-1.tgz
    ${SRC_PATH}/X${MY_SV}src-2.tgz
    ${SRC_PATH}/X${MY_SV}src-3.tgz
    ${SRC_PATH}/X${MY_SV}src-4.tgz
    ${SRC_PATH}/X${MY_SV}src-5.tgz
    doc? ( ${SRC_PATH}/X${MY_SV}src-6.tgz
        ${SRC_PATH}/X${MY_SV}src-7.tgz )"

SRC_URI="${SRC_URI}
    ${X_PATCHES}
    ${X_DRIVERS}
    nls? ( mirror://gentoo/gemini-koi8-u.tar.bz2 )
    mirror://gentoo/eurofonts-X11.tar.bz2
    mirror://gentoo/xfsft-encodings.tar.bz2
    mirror://gentoo/XFree86-compose.dir-0.1.bz2
    mirror://gentoo/XFree86-en_US.UTF-8.old.bz2
    mirror://gentoo/XFree86-locale.alias.bz2
    mirror://gentoo/XFree86-locale.dir.bz2
    mirror://gentoo/gentoo-cursors-tad-${XCUR_VER}.tar.bz2
    truetype? ( !bindist? ( ${MS_FONT_URLS} ) )"

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The code doesn't handle stuff like this. I had another idea, though. I could process each variable as I read it from the file. In bash, a variable has to be defined first to be interpolated into one occuring later. I can interpolate each variable as I read it in, so there is no need for a deptree and recursive functions.

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Re: Re: Re: Re: Re: Re: Re: simulating bash
by japhy (Canon) on May 13, 2004 at 20:37 UTC
    Oh. That's convenient and good. Ok.
    _____________________________________________________
    Jeff[japhy]Pinyan: Perl, regex, and perl hacker, who'd like a job (NYC-area)
    s++=END;++y(;-P)}y js++=;shajsj<++y(p-q)}?print:??;
[reply]
      My code ended up being the following, which works perfectly.

      sub get_depend {
  my $ebuildfname = shift;
  my $ebuildcontents;
  my %ebuildvars;
  my $pkgname = $ebuildfname;

  $pkgname =~ s|/usr/portage/||;
  $pkgname =~ s|(.+)/.+/(.+).ebuild|$1/$2|;
  my $pkg = parse_package_name($pkgname);
  $pkg->{version} =~ s/^-//;
  $ebuildvars{PV} = "$pkg->{version}$pkg->{suffix}";

  open EBUILD, "< $ebuildfname" or die "Couldn't open '$ebuildfname' t
+o get DEPEND\n";
  while(<EBUILD>) {
    if(/^\s*if\s*/ || /^\s*#/) {
      next;
    }
    if(/^\s*\w+\(\)\s*{\s*$/) {
      last;
    }
    $ebuildcontents .= $_;
  }
  close EBUILD;

  while($ebuildcontents =~ /\b([-A-Z0-9_]+)\s*=\s*\"(.*?)\"/sgc) {
    my ($varname, $varvalue) = ($1, $2);
    $varvalue =~ s/\$\{?(\w+)\}?/$ebuildvars{$1}/gs;
    $ebuildvars{$varname} = $varvalue;
  }

  my $depend = $ebuildvars{'DEPEND'} || '';
  $depend .= " $ebuildvars{'RDEPEND'}" if(defined $ebuildvars{'RDEPEND
+'});
  $depend =~ s/(\s+|\n+)/ /gs;

  return $depend;
}

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