[ABI break] support '#' in apt.conf and /etc/apt/preferences

(closes: #189866)

6 files changed, 39 insertions, 11 deletions

diff --git a/apt-pkg/contrib/configuration.cc b/apt-pkg/contrib/configuration.cc
index a82311a3f..80584d3ea 100644
--- a/apt-pkg/contrib/configuration.cc
+++ b/apt-pkg/contrib/configuration.cc
@@ -582,7 +582,7 @@ bool ReadConfigFile(Configuration &Conf,const string &FName,bool AsSectional,
 	 if (InQuote == true)
 	    continue;
 	 
-	 if (*I == '/' && I + 1 != End && I[1] == '/')
+	 if ((*I == '/' && I + 1 != End && I[1] == '/') || *I == '#')
          {
 	    End = I;
 	    break;
diff --git a/apt-pkg/init.h b/apt-pkg/init.h
index 6d8693be9..165299253 100644
--- a/apt-pkg/init.h
+++ b/apt-pkg/init.h
@@ -18,7 +18,7 @@
 
 // See the makefile
 #define APT_PKG_MAJOR 4
-#define APT_PKG_MINOR 6
+#define APT_PKG_MINOR 8
 #define APT_PKG_RELEASE 0
     
 extern const char *pkgVersion;
diff --git a/apt-pkg/makefile b/apt-pkg/makefile
index 087f17740..059f8532b 100644
--- a/apt-pkg/makefile
+++ b/apt-pkg/makefile
@@ -13,7 +13,7 @@ include ../buildlib/defaults.mak
 # methods/makefile - FIXME
 LIBRARY=apt-pkg
 LIBEXT=$(GLIBC_VER)$(LIBSTDCPP_VER)
-MAJOR=4.7
+MAJOR=4.8
 MINOR=0
 SLIBS=$(PTHREADLIB) $(INTLLIBS) -lutil
 APT_DOMAIN:=libapt-pkg$(MAJOR)
diff --git a/apt-pkg/policy.cc b/apt-pkg/policy.cc
index 8b083fd44..98576fc91 100644
--- a/apt-pkg/policy.cc
+++ b/apt-pkg/policy.cc
@@ -239,7 +239,21 @@ signed short pkgPolicy::GetPriority(pkgCache::PkgIterator const &Pkg)
    return 0;
 }
 									/*}}}*/
-
+// PreferenceSection class - Overriding the default TrimRecord method	/*{{{*/
+// ---------------------------------------------------------------------
+/* The preference file is a user generated file so the parser should
+   therefore be a bit more friendly by allowing comments and new lines
+   all over the place rather than forcing a special format */
+class PreferenceSection : public pkgTagSection
+{
+   void TrimRecord(bool BeforeRecord, const char* &End)
+   {
+      for (; Stop < End && (Stop[0] == '\n' || Stop[0] == '\r' || Stop[0] == '#'); Stop++)
+	 if (Stop[0] == '#')
+	    Stop = (const char*) memchr(Stop,'\n',End-Stop);
+   }
+};
+									/*}}}*/
 // ReadPinFile - Load the pin file into a Policy			/*{{{*/
 // ---------------------------------------------------------------------
 /* I'd like to see the preferences file store more than just pin information
@@ -259,7 +273,7 @@ bool ReadPinFile(pkgPolicy &Plcy,string File)
    if (_error->PendingError() == true)
       return false;
    
-   pkgTagSection Tags;
+   PreferenceSection Tags;
    while (TF.Step(Tags) == true)
    {
       string Name = Tags.FindS("Package");
diff --git a/apt-pkg/tagfile.cc b/apt-pkg/tagfile.cc
index 893cb8ee7..7c5d15a58 100644
--- a/apt-pkg/tagfile.cc
+++ b/apt-pkg/tagfile.cc
@@ -81,7 +81,7 @@ bool pkgTagFile::Resize()
    End = Start + EndSize;
    return true;
 }
-
+									/*}}}*/
 // TagFile::Step - Advance to the next section				/*{{{*/
 // ---------------------------------------------------------------------
 /* If the Section Scanner fails we refill the buffer and try again. 
@@ -212,10 +212,12 @@ bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength)
 
    if (Stop == 0)
       return false;
-   
+
    TagCount = 0;
    while (TagCount+1 < sizeof(Indexes)/sizeof(Indexes[0]) && Stop < End)
    {
+       TrimRecord(true,End);
+
       // Start a new index and add it to the hash
       if (isspace(Stop[0]) == 0)
       {
@@ -227,14 +229,14 @@ bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength)
       
       if (Stop == 0)
 	 return false;
-      
+
       for (; Stop+1 < End && Stop[1] == '\r'; Stop++);
 
       // Double newline marks the end of the record
       if (Stop+1 < End && Stop[1] == '\n')
       {
 	 Indexes[TagCount] = Stop - Section;
-	 for (; Stop < End && (Stop[0] == '\n' || Stop[0] == '\r'); Stop++);
+	 TrimRecord(false,End);
 	 return true;
       }
       
@@ -244,6 +246,16 @@ bool pkgTagSection::Scan(const char *Start,unsigned long MaxLength)
    return false;
 }
 									/*}}}*/
+// TagSection::TrimRecord - Trim off any garbage before/after a record	/*{{{*/
+// ---------------------------------------------------------------------
+/* There should be exactly 2 newline at the end of the record, no more. */
+void pkgTagSection::TrimRecord(bool BeforeRecord, const char*& End)
+{
+   if (BeforeRecord == true)
+      return;
+   for (; Stop < End && (Stop[0] == '\n' || Stop[0] == '\r'); Stop++);
+}
+									/*}}}*/
 // TagSection::Trim - Trim off any trailing garbage			/*{{{*/
 // ---------------------------------------------------------------------
 /* There should be exactly 1 newline at the end of the buffer, no more. */
@@ -390,7 +402,6 @@ bool pkgTagSection::FindFlag(const char *Tag,unsigned long &Flags,
    return true;
 }
 									/*}}}*/
-
 // TFRewrite - Rewrite a control record					/*{{{*/
 // ---------------------------------------------------------------------
 /* This writes the control record to stdout rewriting it as necessary. The
diff --git a/apt-pkg/tagfile.h b/apt-pkg/tagfile.h
index 6536932dd..321329a23 100644
--- a/apt-pkg/tagfile.h
+++ b/apt-pkg/tagfile.h
@@ -27,7 +27,6 @@
 class pkgTagSection
 {
    const char *Section;
-   const char *Stop;
    
    // We have a limit of 256 tags per section.
    unsigned int Indexes[256];
@@ -35,6 +34,9 @@ class pkgTagSection
    
    unsigned int TagCount;
      
+   protected:
+   const char *Stop;
+
    public:
    
    inline bool operator ==(const pkgTagSection &rhs) {return Section == rhs.Section;};
@@ -49,6 +51,7 @@ class pkgTagSection
    bool Scan(const char *Start,unsigned long MaxLength);
    inline unsigned long size() const {return Stop - Section;};
    void Trim();
+   virtual void TrimRecord(bool BeforeRecord, const char* &End);
    
    inline unsigned int Count() const {return TagCount;};
    inline void Get(const char *&Start,const char *&Stop,unsigned int I) const