Regexs for install

Author: jgg
Date: 1999-10-21 06:35:00 GMT
Regexs for install

cmdline/apt-get.cc

@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description								/*{{{*/
-// $Id: apt-get.cc,v 1.80 1999/10/18 00:37:35 jgg Exp $
+// $Id: apt-get.cc,v 1.81 1999/10/21 06:35:00 jgg Exp $
 /* ######################################################################
    
    apt-get - Cover for dpkg
@@ -52,6 +52,7 @@
 #include <unistd.h>
 #include <stdio.h>
 #include <errno.h>
+#include <regex.h>
 #include <sys/wait.h>
 									/*}}}*/
 
@@ -730,6 +731,105 @@ bool InstallPackages(CacheFile &Cache,bool ShwKept,bool Ask = true,bool Saftey =
    }   
 }
 									/*}}}*/
+// TryToInstall - Try to install a single package			/*{{{*/
+// ---------------------------------------------------------------------
+/* This used to be inlined in DoInstall, but with the advent of regex package
+   name matching it was split out.. */
+bool TryToInstall(pkgCache::PkgIterator Pkg,pkgDepCache &Cache,
+		  pkgProblemResolver &Fix,bool Remove,bool BrokenFix,
+		  unsigned int &ExpectedInst,bool AllowFail = true)
+{
+   /* This is a pure virtual package and there is a single available 
+      provides */
+   if (Cache[Pkg].CandidateVer == 0 && Pkg->ProvidesList != 0 &&
+       Pkg.ProvidesList()->NextProvides == 0)
+   {
+      pkgCache::PkgIterator Tmp = Pkg.ProvidesList().OwnerPkg();
+      c1out << "Note, installing " << Tmp.Name() << " instead of " << Pkg.Name() << endl;
+      Pkg = Tmp;
+   }
+   
+   // Handle the no-upgrade case
+   if (_config->FindB("APT::Get::no-upgrade",false) == true &&
+       Pkg->CurrentVer != 0)
+   {
+      if (AllowFail == true)
+	 c1out << "Skipping " << Pkg.Name() << ", it is already installed and no-upgrade is set." << endl;
+      return true;
+   }
+   
+   // Check if there is something at all to install
+   pkgDepCache::StateCache &State = Cache[Pkg];
+   if (State.CandidateVer == 0)
+   {
+      if (AllowFail == false)
+	 return false;
+      
+      if (Pkg->ProvidesList != 0)
+      {
+	 c1out << "Package " << Pkg.Name() << " is a virtual package provided by:" << endl;
+	 
+	 pkgCache::PrvIterator I = Pkg.ProvidesList();
+	 for (; I.end() == false; I++)
+	 {
+	    pkgCache::PkgIterator Pkg = I.OwnerPkg();
+	    
+	    if (Cache[Pkg].CandidateVerIter(Cache) == I.OwnerVer())
+	    {
+	       if (Cache[Pkg].Install() == true && Cache[Pkg].NewInstall() == false)
+		  c1out << "  " << Pkg.Name() << " " << I.OwnerVer().VerStr() <<
+		  " [Installed]"<< endl;
+	       else
+		  c1out << "  " << Pkg.Name() << " " << I.OwnerVer().VerStr() << endl;
+	    }      
+	 }
+	 c1out << "You should explicitly select one to install." << endl;
+      }
+      else
+      {
+	 c1out << "Package " << Pkg.Name() << " has no available version, but exists in the database." << endl;
+	 c1out << "This typically means that the package was mentioned in a dependency and " << endl;
+	 c1out << "never uploaded, or that it is an obsolete package." << endl;
+	 
+	 string List;
+	 pkgCache::DepIterator Dep = Pkg.RevDependsList();
+	 for (; Dep.end() == false; Dep++)
+	 {
+	    if (Dep->Type != pkgCache::Dep::Replaces)
+	       continue;
+	    List += string(Dep.ParentPkg().Name()) + " ";
+	 }	    
+	 ShowList(c1out,"However the following packages replace it:",List);
+      }
+      
+      _error->Error("Package %s has no installation candidate",Pkg.Name());
+      return false;
+   }
+   
+   Fix.Protect(Pkg);
+   if (Remove == true)
+   {
+      Fix.Remove(Pkg);
+      Cache.MarkDelete(Pkg,_config->FindB("APT::Get::Purge",false));
+      return true;
+   }
+   
+   // Install it
+   Cache.MarkInstall(Pkg,false);
+   if (State.Install() == false)
+   {
+      if (AllowFail == true)
+	 c1out << "Sorry, " << Pkg.Name() << " is already the newest version"  << endl;
+   }   
+   else
+      ExpectedInst++;
+   
+   // Install it with autoinstalling enabled.
+   if (State.InstBroken() == true && BrokenFix == false)
+      Cache.MarkInstall(Pkg,true);
+   return true;
+}
+									/*}}}*/
 
 // DoUpdate - Update the package lists					/*{{{*/
 // ---------------------------------------------------------------------
@@ -874,78 +974,44 @@ bool DoInstall(CommandLine &CmdL)
       pkgCache::PkgIterator Pkg = Cache->FindPkg(S);
       Packages++;
       if (Pkg.end() == true)
-	 return _error->Error("Couldn't find package %s",S);
-      
-      // Handle the no-upgrade case
-      if (_config->FindB("APT::Get::no-upgrade",false) == true &&
-	  Pkg->CurrentVer != 0)
-      {
-	 c1out << "Skipping " << Pkg.Name() << ", it is already installed and no-upgrade is set." << endl;
-	 continue;
-      }
-      
-      // Check if there is something new to install
-      pkgDepCache::StateCache &State = (*Cache)[Pkg];
-      if (State.CandidateVer == 0)
       {
-	 if (Pkg->ProvidesList != 0)
-	 {
-	    c1out << "Package " << S << " is a virtual package provided by:" << endl;
-
-	    pkgCache::PrvIterator I = Pkg.ProvidesList();
-	    for (; I.end() == false; I++)
-	    {
-	       pkgCache::PkgIterator Pkg = I.OwnerPkg();
-	       
-	       if ((*Cache)[Pkg].CandidateVerIter(*Cache) == I.OwnerVer())
-	       {
-		  if ((*Cache)[Pkg].Install() == true && (*Cache)[Pkg].NewInstall() == false)
-		     c1out << "  " << Pkg.Name() << " " << I.OwnerVer().VerStr() <<
-		     " [Installed]"<< endl;
-		  else
-		     c1out << "  " << Pkg.Name() << " " << I.OwnerVer().VerStr() << endl;
-	       }      
-	    }
-	    c1out << "You should explicly select one to install." << endl;
-	 }
-	 else
+	 // Check if the name is a regex
+	 const char *I;
+	 for (I = S; *I != 0; I++)
+	    if (*I == '.' || *I == '?' || *I == '*')
+	       break;
+	 if (*I == 0)
+	    return _error->Error("Couldn't find package %s",S);
+
+	 // Regexs must always be confirmed
+	 ExpectedInst += 1000;
+	 
+	 // Compile the regex pattern
+	 regex_t Pattern;
+	 if (regcomp(&Pattern,S,REG_EXTENDED | REG_ICASE | 
+		     REG_NOSUB) != 0)
+	    return _error->Error("Regex compilation error");
+	 
+	 // Run over the matches
+	 bool Hit = false;
+	 for (Pkg = Cache->PkgBegin(); Pkg.end() == false; Pkg++)
 	 {
-	    c1out << "Package " << S << " has no available version, but exists in the database." << endl;
-	    c1out << "This typically means that the package was mentioned in a dependency and " << endl;
-	    c1out << "never uploaded, or that it is an obsolete package." << endl;
+	    if (regexec(&Pattern,Pkg.Name(),0,0,0) != 0)
+	       continue;
 	    
-	    string List;
-	    pkgCache::DepIterator Dep = Pkg.RevDependsList();
-	    for (; Dep.end() == false; Dep++)
-	    {
-	       if (Dep->Type != pkgCache::Dep::Replaces)
-		  continue;
-	       List += string(Dep.ParentPkg().Name()) + " ";
-	    }	    
-	    ShowList(c1out,"However the following packages replace it:",List);
+	    Hit |= TryToInstall(Pkg,Cache,Fix,Remove,BrokenFix,
+				ExpectedInst,false);
 	 }
+	 regfree(&Pattern);
 	 
-	 return _error->Error("Package %s has no installation candidate",S);
+	 if (Hit == false)
+	    return _error->Error("Couldn't find package %s",S);
       }
-      
-      Fix.Protect(Pkg);
-      if (Remove == true)
-      {
-	 Fix.Remove(Pkg);
-	 Cache->MarkDelete(Pkg,_config->FindB("APT::Get::Purge",false));
-	 continue;
-      }
-      
-      // Install it
-      Cache->MarkInstall(Pkg,false);
-      if (State.Install() == false)
-	 c1out << "Sorry, " << S << " is already the newest version"  << endl;
       else
-	 ExpectedInst++;
-
-      // Install it with autoinstalling enabled.
-      if (State.InstBroken() == true && BrokenFix == false)
-	 Cache->MarkInstall(Pkg,true);
+      {
+	 if (TryToInstall(Pkg,Cache,Fix,Remove,BrokenFix,ExpectedInst) == false)
+	    return false;
+      }      
    }
 
    /* If we are in the Broken fixing mode we do not attempt to fix the

debian/changelog

@@ -20,6 +20,8 @@ apt (0.3.13.1) unstable; urgency=low
   * Checks for the partial directories before doing downloads Closes: #47392
   * no_proxy environment variable (http only!) Closes: #43476
   * apt-cache showsrc Closes: #45799
+  * De-Refs Single Pure virtual packages. Closes: #42437
+  * Regexs for install. Closes: #35304
   
  -- Jason Gunthorpe <jgg@debian.org>  Fri,  3 Sep 1999 09:04:28 -0700
  

doc/apt-get.8.yo

@@ -78,6 +78,11 @@ hyphen is appended to the package name (with no intervening space), the
 identified package will be removed if it is installed. This latter feature 
 may be used to override decisions made by apt-get's conflict resolution system.
 
+If no package matches the given expression and the expression contains one
+of '.', '?' or '*' then it is assumed to be a POSIX regex and it is applied
+to all package names in the database. Any matches are then installed (or
+removed).
+
 dit(bf(remove))
 bf(remove) is identical to bf(install) except that packages are removed
 instead of installed. If a plus sign is appended to the package name (with no