From f89dba4b4d7c7b4a7a58b238a37597039a3fb92e Mon Sep 17 00:00:00 2001
From: josch <j.schauer@email.de>
Date: Thu, 26 Jun 2014 13:37:40 +0200
Subject: [PATCH] initial commit

---
 findarchwildcardproblems.pl | 143 ++++++++++++++++++++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100755 findarchwildcardproblems.pl

diff --git a/findarchwildcardproblems.pl b/findarchwildcardproblems.pl
new file mode 100755
index 0000000..22cc743
--- /dev/null
+++ b/findarchwildcardproblems.pl
@@ -0,0 +1,143 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+# print invalid architecture wildcards (doesnt match any existing architecture)
+# and duplicate wildcards (an architecture is matched by more than one
+# wildcard) in build dependencies, conflicts, the architecture field and in
+# binary packages listed in the Package-List field
+
+use Dpkg::Control;
+use Dpkg::Compression::FileHandle;
+use Dpkg::Deps;
+use List::MoreUtils qw{any};
+use List::Util qw{first};
+use Dpkg::Arch qw(debarch_is);
+
+my $desc = $ARGV[0]; # /home/josch/gsoc2012/bootstrap/tests/sid-sources-20140101T000000Z
+if (not defined($desc)) {
+    die "need filename";
+}
+my $fh = Dpkg::Compression::FileHandle->new(filename => $desc);
+
+my @debarches = ("amd64", "armel", "armhf", "hurd-i386", "i386", "kfreebsd-amd64", "kfreebsd-i386", "mips", "mipsel", "powerpc", "s390x", "sparc",
+"alpha", "arm64", "hppa", "m68k", "powerpcspe", "ppc64", "sh4", "sparc64", "x32");
+
+while (1) {
+    my $cdata = Dpkg::Control->new(type => CTRL_INDEX_SRC);
+    last if not $cdata->parse($fh, $desc);
+    my $pkgname = $cdata->{"Package"};
+    next if not defined($pkgname);
+    my @depfields = ('Build-Depends', 'Build-Depends-Indep', 'Build-Depends-Arch',
+        'Build-Conflicts', 'Build-Conflicts-Indep', 'Build-Conflicts-Arch');
+    # search for invalid arches in the dependency and conflict fields
+    foreach my $depfield (@depfields) {
+        my $dep_line = $cdata->{$depfield};
+        next if not defined($dep_line);
+        foreach my $dep_and (split(/\s*,\s*/m, $dep_line)) {
+            my @or_list = ();
+            foreach my $dep_or (split(/\s*\|\s*/m, $dep_and)) {
+                my $dep_simple = Dpkg::Deps::Simple->new($dep_or);
+                my $depname = $dep_simple->{package};
+                next if not defined($depname);
+                my $arches = $dep_simple->{arches};
+                next if not defined($arches);
+                # find wildcards that do not match any existing architecture
+                foreach my $arch (@{$arches}) {
+                    $arch =~ s/^!//;
+                    next if (any {debarch_is($_,$arch)} @debarches);
+                    print "ID: $pkgname $arch $depname\n";
+                }
+                # search for duplicate arches in arch restrictions
+                # set match frequency to zero for all arches
+                my %matchfreq = ();
+                foreach my $arch (@debarches) {
+                    $matchfreq{$arch} = 0;
+                }
+                # find duplicates
+                foreach my $arch (@{$arches}) {
+                    $arch =~ s/^!//;
+                    foreach my $a (@debarches) {
+                        if (debarch_is($a, $arch)) {
+                            $matchfreq{$a} += 1;
+                        }
+                    }
+                }
+                # print duplicate matches
+                foreach my $arch (@debarches) {
+                    if ($matchfreq{$arch} > 1) {
+                        print "DD: $pkgname $arch $depname\n";
+                    }
+                }
+            }
+        }
+    }
+    # search for invalid arches in Architecture field
+    my $architecture = $cdata->{"Architecture"};
+    if (defined($architecture)) {
+        # find wildcards that do not match any existing architecture
+        foreach my $arch (split(/\s+/m, $architecture)) {
+            next if ($arch eq "all");
+            next if (any {debarch_is($_,$arch)} @debarches);
+            print "IA: $pkgname $arch\n";
+        }
+        # search for duplicate arches in Architecture field
+        # set match frequency to zero for all arches
+        my %matchfreq = ();
+        foreach my $arch (@debarches) {
+            $matchfreq{$arch} = 0;
+        }
+        # find duplicates
+        foreach my $arch (split(/\s+/m, $architecture)) {
+            next if ($arch eq "all");
+            foreach my $a (@debarches) {
+                if (debarch_is($a, $arch)) {
+                    $matchfreq{$a} += 1;
+                }
+            }
+        }
+        # print duplicate matches
+        foreach my $arch (@debarches) {
+            if ($matchfreq{$arch} > 1) {
+                print "DA: $pkgname $arch\n";
+            }
+        }
+    }
+    # gather the architectures of the generated binary packages
+    my $packagelist = $cdata->{"Package-List"};
+    if (defined($packagelist)) {
+        foreach my $line (split(/\n/m, $packagelist)) {
+            my $architecture = first { /^arch=/ } split(/\s+/m, $line);
+            next if (not defined($architecture));
+            $architecture =~ s/^arch=//;
+            # find wildcards that do not match any existing architecture
+            foreach my $arch (split(/,/m, $architecture)) {
+                next if ($arch eq "all");
+                next if (any {debarch_is($_,$arch)} @debarches);
+                print "IB: $pkgname $arch\n";
+            }
+            # search for duplicate arches in Architecture field
+            # set match frequency to zero for all arches
+            my %matchfreq = ();
+            foreach my $arch (@debarches) {
+                $matchfreq{$arch} = 0;
+            }
+            # find duplicates
+            foreach my $arch (split(/,/m, $architecture)) {
+                next if ($arch eq "all");
+                foreach my $a (@debarches) {
+                    if (debarch_is($a, $arch)) {
+                        $matchfreq{$a} += 1;
+                    }
+                }
+            }
+            # print duplicate matches
+            foreach my $arch (@debarches) {
+                if ($matchfreq{$arch} > 1) {
+                    print "DB: $pkgname $arch\n";
+                }
+            }
+        }
+    }
+}