Bug#473461: apt-get should also have a --no-triggers option

[Michael Vogt <mvo@debian.org>]

On Wed, May 21, 2008 at 09:10:19PM -0400, Joey Hess wrote:
> When you're implementing this, please add a --no-triggers option (or
> something like that) to apt. This will be useful for things like d-i
> that call apt multiple times. Then triggers can be skipped during the
> multiple apt runs, and run once at the end.

The attached patch should implement supression of triggers with -o
DPkg::NoTriggers=true. It also adds --no-triggers to all but the
latest dpkg run as outlined in the triggers.txt dpkg documentation.

I'm a bit nervos adding it to the debian-sid apt branch right now, I
would like to do some more testing first to see if it does not
break. Feedback is very welcome of course.

Cheers,
 Michael



=== modified file 'apt-pkg/deb/dpkgpm.cc'
--- apt-pkg/deb/dpkgpm.cc	2008-01-31 09:06:00 +0000
+++ apt-pkg/deb/dpkgpm.cc	2008-05-28 12:33:24 +0000
@@ -526,6 +526,11 @@
 
    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
       return false;
+
+   // support subpressing of triggers processing for special
+   // cases like d-i that runs the triggers handling manually
+   if(_config->FindB("DPkg::NoTriggers",false) == false)
+      List.push_back(Item(Item::Triggers,PkgIterator()));
    
    // map the dpkg states to the operations that are performed
    // (this is sorted in the same way as Item::Ops)
@@ -572,6 +577,8 @@
    // and the PackageOpsTranslations (human readable strings)
    for (vector<Item>::iterator I = List.begin(); I != List.end();I++)
    {
+      if((*I).Pkg.end()) 
+	 continue;
       string name = (*I).Pkg.Name();
       PackageOpsDone[name] = 0;
       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL;  i++) 
@@ -649,6 +656,7 @@
 	 
 	 case Item::Configure:
 	 Args[n++] = "--configure";
+	 Args[n++] = "--no-triggers";
 	 Size += strlen(Args[n-1]);
 	 break;
 	 
@@ -658,6 +666,11 @@
 	 Args[n++] = "--auto-deconfigure";
 	 Size += strlen(Args[n-1]);
 	 break;
+
+	 case Item::Triggers:
+	 Args[n++] = "--configure";
+	 Args[n++] = "--pending";
+	 break;
       }
       
       // Write in the file or package names
@@ -675,6 +688,8 @@
       {
 	 for (;I != J && Size < MaxArgBytes; I++)
 	 {
+	    if(I->Pkg.end())
+	       continue;
 	    Args[n++] = I->Pkg.Name();
 	    Size += strlen(Args[n-1]);
 	 }	 

=== modified file 'apt-pkg/deb/dpkgpm.h'
--- apt-pkg/deb/dpkgpm.h	2008-01-04 20:33:09 +0000
+++ apt-pkg/deb/dpkgpm.h	2008-05-28 12:21:50 +0000
@@ -53,7 +53,7 @@
   
    struct Item
    {
-      enum Ops {Install, Configure, Remove, Purge} Op;
+      enum Ops {Install, Configure, Remove, Purge, Triggers} Op;
       string File;
       PkgIterator Pkg;
       Item(Ops Op,PkgIterator Pkg,string File = "") : Op(Op),