implement BuildProfileSpec support as dpkg has in 1.17.2

Build-dependencies are now able to include a <profile.foo …>
specification limiting usage similar to already supported [arch …].
More details: https://wiki.debian.org/BuildProfileSpec

Closes: 661537

3 files changed, 101 insertions, 9 deletions

diff --git a/apt-pkg/deb/deblistparser.cc b/apt-pkg/deb/deblistparser.cc
index acdcc4554..a4795f15d 100644
--- a/apt-pkg/deb/deblistparser.cc
+++ b/apt-pkg/deb/deblistparser.cc
@@ -475,17 +475,30 @@ const char *debListParser::ConvertRelation(const char *I,unsigned int &Op)
 /* This parses the dependency elements out of a standard string in place,
    bit by bit. */
 const char *debListParser::ParseDepends(const char *Start,const char *Stop,
+               std::string &Package,std::string &Ver,unsigned int &Op)
+   { return ParseDepends(Start, Stop, Package, Ver, Op, false, true, false); }
+const char *debListParser::ParseDepends(const char *Start,const char *Stop,
+               std::string &Package,std::string &Ver,unsigned int &Op,
+               bool const &ParseArchFlags)
+   { return ParseDepends(Start, Stop, Package, Ver, Op, ParseArchFlags, true, false); }
+const char *debListParser::ParseDepends(const char *Start,const char *Stop,
+               std::string &Package,std::string &Ver,unsigned int &Op,
+               bool const &ParseArchFlags, bool const &StripMultiArch)
+   { return ParseDepends(Start, Stop, Package, Ver, Op, ParseArchFlags, StripMultiArch, false); }
+const char *debListParser::ParseDepends(const char *Start,const char *Stop,
 					string &Package,string &Ver,
 					unsigned int &Op, bool const &ParseArchFlags,
-					bool const &StripMultiArch)
+					bool const &StripMultiArch,
+					bool const &ParseRestrictionsList)
 {
    // Strip off leading space
-   for (;Start != Stop && isspace(*Start) != 0; Start++);
+   for (;Start != Stop && isspace(*Start) != 0; ++Start);
    
    // Parse off the package name
    const char *I = Start;
    for (;I != Stop && isspace(*I) == 0 && *I != '(' && *I != ')' &&
-	*I != ',' && *I != '|' && *I != '[' && *I != ']'; I++);
+	*I != ',' && *I != '|' && *I != '[' && *I != ']' &&
+	*I != '<' && *I != '>'; ++I);
    
    // Malformed, no '('
    if (I != Stop && *I == ')')
@@ -602,6 +615,76 @@ const char *debListParser::ParseDepends(const char *Start,const char *Stop,
       for (;I != Stop && isspace(*I) != 0; I++);
    }
 
+   if (ParseRestrictionsList == true)
+   {
+      // Parse a restrictions list
+      if (I != Stop && *I == '<')
+      {
+	 ++I;
+	 // malformed
+	 if (unlikely(I == Stop))
+	    return 0;
+
+	 std::vector<string> const profiles = _config->FindVector("APT::Build-Profiles");
+
+	 const char *End = I;
+	 bool Found = false;
+	 bool NegRestriction = false;
+	 while (I != Stop)
+	 {
+	    // look for whitespace or ending '>'
+	    for (;End != Stop && !isspace(*End) && *End != '>'; ++End);
+
+	    if (unlikely(End == Stop))
+	       return 0;
+
+	    if (*I == '!')
+	    {
+	       NegRestriction = true;
+	       ++I;
+	    }
+
+	    std::string restriction(I, End);
+
+	    std::string prefix = "profile.";
+	    // only support for "profile" prefix, ignore others
+	    if (restriction.size() > prefix.size() &&
+		  restriction.substr(0, prefix.size()) == prefix)
+	    {
+	       // get the name of the profile
+	       restriction = restriction.substr(prefix.size());
+
+	       if (restriction.empty() == false && profiles.empty() == false &&
+		     std::find(profiles.begin(), profiles.end(), restriction) != profiles.end())
+	       {
+		  Found = true;
+		  if (I[-1] != '!')
+		     NegRestriction = false;
+		  // we found a match, so fast-forward to the end of the wildcards
+		  for (; End != Stop && *End != '>'; ++End);
+	       }
+	    }
+
+	    if (*End++ == '>') {
+	       I = End;
+	       break;
+	    }
+
+	    I = End;
+	    for (;I != Stop && isspace(*I) != 0; I++);
+	 }
+
+	 if (NegRestriction == true)
+	    Found = !Found;
+
+	 if (Found == false)
+	    Package = ""; /* not for this restriction */
+      }
+
+      // Skip whitespace
+      for (;I != Stop && isspace(*I) != 0; I++);
+   }
+
    if (I != Stop && *I == '|')
       Op |= pkgCache::Dep::Or;
    
@@ -635,7 +718,7 @@ bool debListParser::ParseDepends(pkgCache::VerIterator &Ver,
       string Version;
       unsigned int Op;
 
-      Start = ParseDepends(Start, Stop, Package, Version, Op, false, false);
+      Start = ParseDepends(Start, Stop, Package, Version, Op, false, false, false);
       if (Start == 0)
 	 return _error->Error("Problem parsing dependency %s",Tag);
       size_t const found = Package.rfind(':');
diff --git a/apt-pkg/deb/deblistparser.h b/apt-pkg/deb/deblistparser.h
index 386d291a2..0531b20f3 100644
--- a/apt-pkg/deb/deblistparser.h
+++ b/apt-pkg/deb/deblistparser.h
@@ -72,11 +72,20 @@ class debListParser : public pkgCacheGenerator::ListParser
    
    bool LoadReleaseInfo(pkgCache::PkgFileIterator &FileI,FileFd &File,
 			std::string section);
-   
+
+   static const char *ParseDepends(const char *Start,const char *Stop,
+	 std::string &Package,std::string &Ver,unsigned int &Op);
    static const char *ParseDepends(const char *Start,const char *Stop,
-			    std::string &Package,std::string &Ver,unsigned int &Op,
-			    bool const &ParseArchFlags = false,
-			    bool const &StripMultiArch = true);
+	 std::string &Package,std::string &Ver,unsigned int &Op,
+	 bool const &ParseArchFlags);
+   static const char *ParseDepends(const char *Start,const char *Stop,
+	 std::string &Package,std::string &Ver,unsigned int &Op,
+	 bool const &ParseArchFlags, bool const &StripMultiArch);
+   static const char *ParseDepends(const char *Start,const char *Stop,
+	 std::string &Package,std::string &Ver,unsigned int &Op,
+	 bool const &ParseArchFlags, bool const &StripMultiArch,
+	 bool const &ParseRestrictionsList);
+
    static const char *ConvertRelation(const char *I,unsigned int &Op);
 
    debListParser(FileFd *File, std::string const &Arch = "");
diff --git a/apt-pkg/deb/debsrcrecords.cc b/apt-pkg/deb/debsrcrecords.cc
index ce55ccd1f..90182b4a4 100644
--- a/apt-pkg/deb/debsrcrecords.cc
+++ b/apt-pkg/deb/debsrcrecords.cc
@@ -90,7 +90,7 @@ bool debSrcRecordParser::BuildDepends(std::vector<pkgSrcRecords::Parser::BuildDe
       while (1)
       {
          Start = debListParser::ParseDepends(Start, Stop, 
-		     rec.Package,rec.Version,rec.Op,true, StripMultiArch);
+		     rec.Package,rec.Version,rec.Op,true,StripMultiArch,true);
 	 
          if (Start == 0) 
             return _error->Error("Problem parsing dependency: %s", fields[I]);