* fix: read package info in remove component

* implement componentwise package ops, just take a look at this beauty:

nebula:pisi$ ./pisi-cli -B -Dtmp it system.base
The following minimal list of packages will be installed
in the respective order to satisfy dependencies:
file
Installing file, version 4.12, release 1, build 2
Extracting files
Storing files.xml,
Storing metadata.xml.
Regenerating /etc/ld.so.cache...
Updating environment...
running /sbin/ldconfig -X -r /home/exa/code/projects/pisi/tmp
Installed file
nebula:pisi$ ./pisi-cli -B -Dtmp rm system.base
The following minimal list of packages will be removed
in the respective order to satisfy dependencies:
file
Removing package file
Not removing non-file, non-link
/home/exa/code/projects/pisi/tmp/usr/share/man/man5
Removed file

TODO

@@ -99,7 +99,7 @@ Legend:
      + query list of packages in a component
      + index: update component database(s)
      + bug fixing
-   - install/remove components
+   + install/remove/upgrade components
    - safety switch: preserve system.base, install system.devel for build, etc. 
  + multiple package repository (eray)
    + decide how to implement

pisi/operations.py

@@ -174,13 +174,22 @@ def check_conflicts(order):
             #raise Error(_("Package %s conflicts installed package %s") % (x, pkg))
             raise Error(_("Conflicts remain"))
 
+def expand_components(A):
+    Ap = set()
+    for x in A:
+        if ctx.componentdb.has_component(x):
+            Ap = Ap.union(ctx.componentdb.get_component(x).packages)
+        else:
+            Ap.append(x)
+    return Ap
+
 def install_pkg_names(A):
     """This is the real thing. It installs packages from
     the repository, trying to perform a minimum number of
     installs"""
 
-    A_0 = A = set(A) # A was a list, remove duplicates
-
+    # A was a list, remove duplicates and expand components
+    A_0 = A = expand_components(set(A))
     ctx.ui.debug('A = %s' % str(A))
 
     if len(A)==0:
@@ -245,7 +254,7 @@ def upgrade_pkg_names(A = []):
         A = ctx.installdb.list_installed()
 
     # filter packages that are not upgradable
-    A_0 = A = set(A)
+    A_0 = A = expand_components(set(A))
     Ap = []
     for x in A:
         if x.endswith('.pisi'):
@@ -369,7 +378,7 @@ def remove(A):
     """remove set A of packages from system (A is a list of package names)"""
     
     # filter packages that are not installed
-    A_0 = A = set(A)
+    A_0 = A = expand_components(set(A))
     Ap = []
     for x in A:
         if ctx.installdb.is_installed(x):

pisi/packagedb.py

@@ -86,6 +86,7 @@ class PackageDB(object):
 
     def remove_package(self, name):
         name = str(name)
+        package_info = self.d[name]
         del self.d[name]
         #FIXME: what's happening to dr?
         ctx.componentdb.remove_package(package_info.partOf, package_info.name)