implement MultiarchCross for build-dep and source (Closes: #632221)

6 files changed, 341 insertions, 8 deletions

diff --git a/cmdline/apt-get.cc b/cmdline/apt-get.cc
index b3ce54bb7..8eda29362 100644
--- a/cmdline/apt-get.cc
+++ b/cmdline/apt-get.cc
@@ -2620,12 +2620,17 @@ bool DoSource(CommandLine &CmdL)
 	 // Try to compile it with dpkg-buildpackage
 	 if (_config->FindB("APT::Get::Compile",false) == true)
 	 {
+	    string buildopts = _config->Find("APT::Get::Host-Architecture");
+	    if (buildopts.empty() == false)
+	       buildopts = "-a " + buildopts + " ";
+	    buildopts.append(_config->Find("DPkg::Build-Options","-b -uc"));
+
 	    // Call dpkg-buildpackage
 	    char S[500];
 	    snprintf(S,sizeof(S),"cd %s && %s %s",
 		     Dir.c_str(),
 		     _config->Find("Dir::Bin::dpkg-buildpackage","dpkg-buildpackage").c_str(),
-		     _config->Find("DPkg::Build-Options","-b -uc").c_str());
+		     buildopts.c_str());
 	    
 	    if (system(S) != 0)
 	    {
@@ -2687,8 +2692,19 @@ bool DoBuildDep(CommandLine &CmdL)
    if (Fetcher.Setup(&Stat) == false)
       return false;
 
+   bool StripMultiArch;
+   string hostArch = _config->Find("APT::Get::Host-Architecture");
+   if (hostArch.empty() == false)
+   {
+      std::vector<std::string> archs = APT::Configuration::getArchitectures();
+      if (std::find(archs.begin(), archs.end(), hostArch) == archs.end())
+	 return _error->Error(_("No architecture information available for %s. See apt.conf(5) APT::Architectures for setup"), hostArch.c_str());
+      StripMultiArch = false;
+   }
+   else
+      StripMultiArch = true;
+
    unsigned J = 0;
-   bool const StripMultiArch = APT::Configuration::getArchitectures().size() <= 1;
    for (const char **I = CmdL.FileList + 1; *I != 0; I++, J++)
    {
       string Src;
@@ -2722,7 +2738,7 @@ bool DoBuildDep(CommandLine &CmdL)
 	 ioprintf(c1out,_("%s has no build depends.\n"),Src.c_str());
 	 continue;
       }
-      
+
       // Install the requested packages
       vector <pkgSrcRecords::Parser::BuildDepRec>::iterator D;
       pkgProblemResolver Fix(Cache);
@@ -2773,7 +2789,95 @@ bool DoBuildDep(CommandLine &CmdL)
             if (_config->FindB("Debug::BuildDeps",false) == true)
                  cout << "Looking for " << (*D).Package << "...\n";
 
-	    pkgCache::PkgIterator Pkg = Cache->FindPkg((*D).Package);
+	    pkgCache::PkgIterator Pkg;
+
+	    // Cross-Building?
+	    if (StripMultiArch == false)
+	    {
+	       size_t const colon = D->Package.find(":");
+	       if (colon != string::npos &&
+		   (strcmp(D->Package.c_str() + colon, ":any") == 0 || strcmp(D->Package.c_str() + colon, ":native") == 0))
+		  Pkg = Cache->FindPkg(D->Package.substr(0,colon));
+	       else
+		  Pkg = Cache->FindPkg(D->Package);
+
+	       // We need to decide if host or build arch, so find a version we can look at
+	       pkgCache::VerIterator Ver;
+
+	       // a bad version either is invalid or doesn't satify dependency
+	       #define BADVER(Ver) Ver.end() == true || \
+				   (Ver.end() == false && D->Version.empty() == false && \
+				    Cache->VS().CheckDep(Ver.VerStr(),D->Op,D->Version.c_str()) == false)
+
+	       if (Pkg.end() == false)
+	       {
+		  Ver = (*Cache)[Pkg].InstVerIter(*Cache);
+		  if (BADVER(Ver))
+		     Ver = (*Cache)[Pkg].CandidateVerIter(*Cache);
+	       }
+	       if (BADVER(Ver))
+	       {
+		  pkgCache::PkgIterator HostPkg = Cache->FindPkg(D->Package, hostArch);
+		  if (HostPkg.end() == false)
+		  {
+		     Ver = (*Cache)[HostPkg].InstVerIter(*Cache);
+		     if (BADVER(Ver))
+		        Ver = (*Cache)[HostPkg].CandidateVerIter(*Cache);
+		  }
+	       }
+	       if ((BADVER(Ver)) == false)
+	       {
+		  string forbidden;
+		  if (Ver->MultiArch == pkgCache::Version::None || Ver->MultiArch == pkgCache::Version::All);
+		  else if (Ver->MultiArch == pkgCache::Version::Same)
+		  {
+		     if (colon != string::npos)
+			Pkg = Ver.ParentPkg().Group().FindPkg(hostArch);
+		     else if (strcmp(D->Package.c_str() + colon, ":any") == 0)
+			forbidden = "Multi-Arch: same";
+		     // :native gets the buildArch
+		  }
+		  else if (Ver->MultiArch == pkgCache::Version::Foreign || Ver->MultiArch == pkgCache::Version::AllForeign)
+		  {
+		     if (colon != string::npos)
+			forbidden = "Multi-Arch: foreign";
+		  }
+		  else if (Ver->MultiArch == pkgCache::Version::Allowed || Ver->MultiArch == pkgCache::Version::AllAllowed)
+		  {
+		     if (colon == string::npos)
+			Pkg = Ver.ParentPkg().Group().FindPkg(hostArch);
+		     else if (strcmp(D->Package.c_str() + colon, ":any") == 0)
+		     {
+			// prefer any installed over preferred non-installed architectures
+			pkgCache::GrpIterator Grp = Ver.ParentPkg().Group();
+			// we don't check for version here as we are better of with upgrading than remove and install
+			for (Pkg = Grp.PackageList(); Pkg.end() == false; Pkg = Grp.NextPkg(Pkg))
+			   if (Pkg.CurrentVer().end() == false)
+			      break;
+			if (Pkg.end() == true)
+			   Pkg = Grp.FindPreferredPkg(true);
+		     }
+		     // native gets buildArch
+		  }
+		  if (forbidden.empty() == false)
+		  {
+		     if (_config->FindB("Debug::BuildDeps",false) == true)
+			cout << " :any is not allowed from M-A: same package " << (*D).Package << endl;
+		     if (hasAlternatives)
+			continue;
+		     return _error->Error(_("%s dependency for %s can't be satisfied "
+					    "because %s is not allowed on '%s' packages"),
+					  Last->BuildDepType(D->Type), Src.c_str(),
+					  D->Package.c_str(), "Multi-Arch: same");
+		  }
+	       }
+	       else if (_config->FindB("Debug::BuildDeps",false) == true)
+		  cout << " No multiarch info as we have no satisfying installed nor candidate for " << D->Package << " on build or host arch" << endl;
+	       #undef BADVER
+	    }
+	    else
+	       Pkg = Cache->FindPkg(D->Package);
+
 	    if (Pkg.end() == true)
             {
                if (_config->FindB("Debug::BuildDeps",false) == true)
@@ -3241,6 +3345,7 @@ int main(int argc,const char *argv[])					/*{{{*/
       {'m',"ignore-missing","APT::Get::Fix-Missing",0},
       {'t',"target-release","APT::Default-Release",CommandLine::HasArg},
       {'t',"default-release","APT::Default-Release",CommandLine::HasArg},
+      {'a',"host-architecture","APT::Get::Host-Architecture",CommandLine::HasArg},
       {0,"download","APT::Get::Download",0},
       {0,"fix-missing","APT::Get::Fix-Missing",0},
       {0,"ignore-hold","APT::Ignore-Hold",0},      
diff --git a/debian/changelog b/debian/changelog
index fe4b233a4..c32edc4ad 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -19,6 +19,7 @@ apt (0.8.15.3) UNRELEASED; urgency=low
     - restore all important dependencies for garbage packages (LP: #806274)
     - do not require unused partial dirs in 'source' (Closes: #633510)
     - buildconflicts effect all architectures
+    - implement MultiarchCross for build-dep and source (Closes: #632221)
   * apt-pkg/init.cc:
     - use CndSet in pkgInitConfig (Closes: #629617)
   * apt-pkg/depcache.cc:
@@ -39,7 +40,7 @@ apt (0.8.15.3) UNRELEASED; urgency=low
       save to ignore them in non-MultiArch contexts but if the dependency
       is a specific architecture (and not the native) do not strip
 
- -- David Kalnischkies <kalnischkies@gmail.com>  Mon, 25 Jul 2011 12:46:19 +0200
+ -- David Kalnischkies <kalnischkies@gmail.com>  Mon, 25 Jul 2011 14:40:00 +0200
 
 apt (0.8.15.2) unstable; urgency=high
 
diff --git a/doc/apt-get.8.xml b/doc/apt-get.8.xml
index 11b53e5e7..9d901b492 100644
--- a/doc/apt-get.8.xml
+++ b/doc/apt-get.8.xml
@@ -54,6 +54,13 @@
 			<replaceable>target_release</replaceable>
 		</arg>
       </arg>
+      <arg>
+		<option>-a=</option>
+		<arg choice='plain'>
+			<replaceable>default_architecture</replaceable>
+		</arg>
+      </arg>
+
 
       <group choice="req">
          <arg choice='plain'>update</arg>
@@ -254,8 +261,10 @@
 
      <para>If the <option>--compile</option> option is specified
      then the package will be compiled to a binary .deb using
-     <command>dpkg-buildpackage</command>, if <option>--download-only</option>
-     is specified then the source package will not be unpacked.</para>
+     <command>dpkg-buildpackage</command> for the architecture as
+     defined by the <command>--host-architecture</command> option.
+     If <option>--download-only</option> is specified then the source package
+     will not be unpacked.</para>
 
      <para>A specific source version can be retrieved by postfixing the source name
      with an equals and then the version to fetch, similar to the mechanism
@@ -270,7 +279,9 @@
 
      <varlistentry><term>build-dep</term>
      <listitem><para><literal>build-dep</literal> causes apt-get to install/remove packages in an 
-     attempt to satisfy the build dependencies for a source package.</para></listitem>
+     attempt to satisfy the build dependencies for a source package. By default the dependencies are
+     satisfied to build the package nativly. If desired a host-architecture can be specified
+     with the <option>--host-architecture</option> option instead.</para></listitem>
      </varlistentry>
 
      <varlistentry><term>check</term>
@@ -433,6 +444,16 @@
      Configuration Item: <literal>APT::Get::Show-Versions</literal>.</para></listitem>
      </varlistentry>
 
+     <varlistentry><term><option>-a</option></term>
+                   <term><option>--host-architecture</option></term>
+     <listitem><para>This option controls the architecture packages are built for
+     by <command>apt-get source --compile</command> and how cross-builddependencies
+     are satisfied. By default is not set which means that the host architecture
+     is the same as the build architecture (which is defined by <literal>APT::Architecture</literal>)
+     Configuration Item: <literal>APT::Get::Host-Architecture</literal>
+     </para></listitem>
+     </varlistentry>
+
      <varlistentry><term><option>-b</option></term><term><option>--compile</option></term>
                    <term><option>--build</option></term>
      <listitem><para>Compile source packages after downloading them.
diff --git a/doc/examples/configure-index b/doc/examples/configure-index
index 27232d40b..49e803f91 100644
--- a/doc/examples/configure-index
+++ b/doc/examples/configure-index
@@ -32,6 +32,7 @@ APT
   // Options for apt-get
   Get 
   {
+     Host-Architecture "armel";
      Arch-Only "false";
      AllowUnauthenticated "false";
      AutomaticRemove "false";       
diff --git a/test/integration/framework b/test/integration/framework
index 702e352a3..fa451cf4f 100644
--- a/test/integration/framework
+++ b/test/integration/framework
@@ -151,6 +151,7 @@ setupenvironment() {
 
 configarchitecture() {
 	local CONFFILE=rootdir/etc/apt/apt.conf.d/01multiarch.conf
+	rm -f $CONFFILE
 	echo "APT::Architecture \"$1\";" > $CONFFILE
 	shift
 	while [ -n "$1" ]; do
@@ -429,6 +430,27 @@ Filename: pool/main/${NAME}/${NAME}_${VERSION}_${arch}.deb" >> $FILE
 	done
 }
 
+insertsource() {
+	local RELEASE="$1"
+	local NAME="$2"
+	local ARCH="$3"
+	local VERSION="$4"
+	local DEPENDENCIES="$5"
+	local ARCHS=""
+	local SPATH="aptarchive/dists/${RELEASE}/main/source"
+	mkdir -p $SPATH
+	local FILE="${SPATH}/Sources"
+	echo "Package: $NAME
+Binary: $NAME
+Version: $VERSION
+Maintainer: Joe Sixpack <joe@example.org>
+Architecture: $ARCH" >> $FILE
+	test -z "$DEPENDENCIES" || echo "$DEPENDENCIES" >> $FILE
+	echo "Files:
+ d41d8cd98f00b204e9800998ecf8427e 0 ${NAME}_${VERSION}.dsc
+ d41d8cd98f00b204e9800998ecf8427e 0 ${NAME}_${VERSION}.tar.gz" >> $FILE
+}
+
 insertinstalledpackage() {
 	local NAME="$1"
 	local ARCH="$2"
diff --git a/test/integration/test-bug-632221-cross-dependency-satisfaction b/test/integration/test-bug-632221-cross-dependency-satisfaction
new file mode 100755
index 000000000..58de44843
--- /dev/null
+++ b/test/integration/test-bug-632221-cross-dependency-satisfaction
@@ -0,0 +1,183 @@
+#!/bin/sh
+set -e
+
+TESTDIR=$(readlink -f $(dirname $0))
+. $TESTDIR/framework
+setupenvironment
+configarchitecture 'amd64' 'armel'
+
+insertinstalledpackage 'build-essential' 'all' '11.5'
+
+insertpackage 'unstable' 'doxygen' 'amd64,armel' '1.0'
+insertpackage 'unstable' 'libc6' 'amd64,armel' '1.0' 'Multi-Arch: same'
+insertpackage 'unstable' 'libc6-dev' 'amd64,armel' '1.0' 'Depends: libc6
+Multi-Arch: same'
+insertpackage 'unstable' 'cool' 'amd64,armel' '1.0' 'Multi-Arch: allowed'
+insertpackage 'unstable' 'amdboot' 'amd64' '1.0'
+insertpackage 'unstable' 'foreigner' 'amd64,armel' '1.0' 'Multi-Arch: foreign'
+
+insertsource 'unstable' 'apt' 'any' '0.8.15' 'Build-Depends: doxygen, libc6-dev, libc6-dev:native, cool:any, amdboot:amd64, foreigner'
+
+setupaptarchive
+
+testequal 'Reading package lists...
+Building dependency tree...
+The following NEW packages will be installed:
+  amdboot cool doxygen foreigner libc6 libc6-dev
+0 upgraded, 6 newly installed, 0 to remove and 0 not upgraded.
+Inst amdboot (1.0 unstable [amd64])
+Inst cool (1.0 unstable [amd64])
+Inst doxygen (1.0 unstable [amd64])
+Inst foreigner (1.0 unstable [amd64])
+Inst libc6 (1.0 unstable [amd64])
+Inst libc6-dev (1.0 unstable [amd64])
+Conf amdboot (1.0 unstable [amd64])
+Conf cool (1.0 unstable [amd64])
+Conf doxygen (1.0 unstable [amd64])
+Conf foreigner (1.0 unstable [amd64])
+Conf libc6 (1.0 unstable [amd64])
+Conf libc6-dev (1.0 unstable [amd64])' aptget build-dep apt -s
+
+testequal 'Reading package lists...
+Building dependency tree...
+The following NEW packages will be installed:
+  amdboot cool doxygen foreigner libc6 libc6:armel libc6-dev libc6-dev:armel
+0 upgraded, 8 newly installed, 0 to remove and 0 not upgraded.
+Inst amdboot (1.0 unstable [amd64])
+Inst cool (1.0 unstable [amd64])
+Inst doxygen (1.0 unstable [amd64])
+Inst foreigner (1.0 unstable [amd64])
+Inst libc6:armel (1.0 unstable [armel])
+Inst libc6 (1.0 unstable [amd64])
+Inst libc6-dev:armel (1.0 unstable [armel])
+Inst libc6-dev (1.0 unstable [amd64])
+Conf amdboot (1.0 unstable [amd64])
+Conf cool (1.0 unstable [amd64])
+Conf doxygen (1.0 unstable [amd64])
+Conf foreigner (1.0 unstable [amd64])
+Conf libc6 (1.0 unstable [amd64])
+Conf libc6:armel (1.0 unstable [armel])
+Conf libc6-dev (1.0 unstable [amd64])
+Conf libc6-dev:armel (1.0 unstable [armel])' aptget build-dep apt -s -a armel
+
+configarchitecture 'armel' 'amd64'
+
+testequal 'Reading package lists...
+Building dependency tree...
+The following NEW packages will be installed:
+  amdboot:amd64 cool doxygen foreigner libc6 libc6-dev
+0 upgraded, 6 newly installed, 0 to remove and 0 not upgraded.
+Inst amdboot:amd64 (1.0 unstable [amd64])
+Inst cool (1.0 unstable [armel])
+Inst doxygen (1.0 unstable [armel])
+Inst foreigner (1.0 unstable [armel])
+Inst libc6 (1.0 unstable [armel])
+Inst libc6-dev (1.0 unstable [armel])
+Conf amdboot:amd64 (1.0 unstable [amd64])
+Conf cool (1.0 unstable [armel])
+Conf doxygen (1.0 unstable [armel])
+Conf foreigner (1.0 unstable [armel])
+Conf libc6 (1.0 unstable [armel])
+Conf libc6-dev (1.0 unstable [armel])' aptget build-dep apt -s
+
+testequal 'Reading package lists...
+Building dependency tree...
+The following NEW packages will be installed:
+  amdboot:amd64 cool doxygen foreigner libc6:amd64 libc6 libc6-dev:amd64
+  libc6-dev
+0 upgraded, 8 newly installed, 0 to remove and 0 not upgraded.
+Inst amdboot:amd64 (1.0 unstable [amd64])
+Inst cool (1.0 unstable [armel])
+Inst doxygen (1.0 unstable [armel])
+Inst foreigner (1.0 unstable [armel])
+Inst libc6 (1.0 unstable [armel])
+Inst libc6:amd64 (1.0 unstable [amd64])
+Inst libc6-dev (1.0 unstable [armel])
+Inst libc6-dev:amd64 (1.0 unstable [amd64])
+Conf amdboot:amd64 (1.0 unstable [amd64])
+Conf cool (1.0 unstable [armel])
+Conf doxygen (1.0 unstable [armel])
+Conf foreigner (1.0 unstable [armel])
+Conf libc6:amd64 (1.0 unstable [amd64])
+Conf libc6 (1.0 unstable [armel])
+Conf libc6-dev:amd64 (1.0 unstable [amd64])
+Conf libc6-dev (1.0 unstable [armel])' aptget build-dep apt -s -a amd64
+
+configarchitecture 'amd64' 'armel'
+
+insertinstalledpackage 'cool' 'amd64' '0.5'
+insertinstalledpackage 'foreigner' 'armel' '0.5'
+
+testequal 'Reading package lists...
+Building dependency tree...
+The following NEW packages will be installed:
+  amdboot doxygen libc6 libc6-dev
+0 upgraded, 4 newly installed, 0 to remove and 2 not upgraded.
+Inst amdboot (1.0 unstable [amd64])
+Inst doxygen (1.0 unstable [amd64])
+Inst libc6 (1.0 unstable [amd64])
+Inst libc6-dev (1.0 unstable [amd64])
+Conf amdboot (1.0 unstable [amd64])
+Conf doxygen (1.0 unstable [amd64])
+Conf libc6 (1.0 unstable [amd64])
+Conf libc6-dev (1.0 unstable [amd64])' aptget build-dep apt -s
+
+testequal 'Reading package lists...
+Building dependency tree...
+The following NEW packages will be installed:
+  amdboot doxygen libc6 libc6:armel libc6-dev libc6-dev:armel
+0 upgraded, 6 newly installed, 0 to remove and 2 not upgraded.
+Inst amdboot (1.0 unstable [amd64])
+Inst doxygen (1.0 unstable [amd64])
+Inst libc6:armel (1.0 unstable [armel])
+Inst libc6 (1.0 unstable [amd64])
+Inst libc6-dev:armel (1.0 unstable [armel])
+Inst libc6-dev (1.0 unstable [amd64])
+Conf amdboot (1.0 unstable [amd64])
+Conf doxygen (1.0 unstable [amd64])
+Conf libc6 (1.0 unstable [amd64])
+Conf libc6:armel (1.0 unstable [armel])
+Conf libc6-dev (1.0 unstable [amd64])
+Conf libc6-dev:armel (1.0 unstable [armel])' aptget build-dep apt -s -a armel
+
+configarchitecture 'armel' 'amd64'
+
+# cool 0.5 is not M-A: allowed, so amd64 is not acceptable
+testequal 'Reading package lists...
+Building dependency tree...
+The following packages will be REMOVED:
+  cool:amd64
+The following NEW packages will be installed:
+  amdboot:amd64 cool doxygen libc6 libc6-dev
+0 upgraded, 5 newly installed, 1 to remove and 1 not upgraded.
+Remv cool:amd64 [0.5]
+Inst amdboot:amd64 (1.0 unstable [amd64])
+Inst cool (1.0 unstable [armel])
+Inst doxygen (1.0 unstable [armel])
+Inst libc6 (1.0 unstable [armel])
+Inst libc6-dev (1.0 unstable [armel])
+Conf amdboot:amd64 (1.0 unstable [amd64])
+Conf cool (1.0 unstable [armel])
+Conf doxygen (1.0 unstable [armel])
+Conf libc6 (1.0 unstable [armel])
+Conf libc6-dev (1.0 unstable [armel])' aptget build-dep apt -s
+
+testequal 'Reading package lists...
+Building dependency tree...
+The following NEW packages will be installed:
+  amdboot:amd64 doxygen libc6:amd64 libc6 libc6-dev:amd64 libc6-dev
+0 upgraded, 6 newly installed, 0 to remove and 2 not upgraded.
+Inst amdboot:amd64 (1.0 unstable [amd64])
+Inst doxygen (1.0 unstable [armel])
+Inst libc6 (1.0 unstable [armel])
+Inst libc6:amd64 (1.0 unstable [amd64])
+Inst libc6-dev (1.0 unstable [armel])
+Inst libc6-dev:amd64 (1.0 unstable [amd64])
+Conf amdboot:amd64 (1.0 unstable [amd64])
+Conf doxygen (1.0 unstable [armel])
+Conf libc6:amd64 (1.0 unstable [amd64])
+Conf libc6 (1.0 unstable [armel])
+Conf libc6-dev:amd64 (1.0 unstable [amd64])
+Conf libc6-dev (1.0 unstable [armel])' aptget build-dep apt -s -a amd64
+
+