Install packages from prefered repositories.

* Yyoom tries to install packages from preferred
  repositories and, if packages were not found,
  tries to install them from default ones.
* Preferred repositories are passed to yyoom from
  the dependency handler.

Change-Id: Iede5ad1c58c105c2627ad1012e959f0f93c4a447

anvil/packaging/helpers/yum_helper.py

@@ -38,11 +38,13 @@ def _parse_json(value):
 
 class Helper(object):
 
-    def __init__(self, log_dir):
+    def __init__(self, log_dir, repos):
         # Executables we require to operate
         self.yyoom_executable = sh.which("yyoom", ["tools/"])
         # Executable logs will go into this directory
         self._log_dir = log_dir
+        # Preferred repositories names
+        self._repos = repos
         # Caches of installed and available packages
         self._installed = None
         self._available = None
@@ -136,6 +138,9 @@ class Helper(object):
         for pkg in remove_pkgs:
             cmdline.append('--erase')
             cmdline.append(pkg)
+        for repo in self._repos:
+            cmdline.append('--prefer-repo')
+            cmdline.append(repo)
 
         try:
             cmd_type = 'transaction'

anvil/packaging/yum.py

@@ -94,7 +94,7 @@ class YumDependencyHandler(base.DependencyHandler):
         self.rpmbuild_executable = sh.which("rpmbuild")
         self.specprint_executable = sh.which('specprint', ["tools/"])
         # We inspect yum for packages, this helper allows us to do this.
-        self.helper = yum_helper.Helper(self.log_dir)
+        self.helper = yum_helper.Helper(self.log_dir, self.REPOS)
         # See if we are requested to run at a higher make parallelism level
         self._jobs = self.JOBS
         if 'jobs' in self.opts:

tools/yyoom

@@ -254,19 +254,27 @@ def _run(yum_base, options):
     with _transaction(yum_base,
                       _OutputtingRPMCallback(options.skip_missing)) as cb:
         yum_map = build_yum_map(yum_base)
+        # erase packages
         for pkg_name in options.erase or ():
             matches = _find_packages(yum_map, pkg_name)
             if matches is None:
                 cb.yyoom_on_missing_package(pkg_name)
-            installed_packages = yum_base.rpmdb.returnPackages()
-            for package in matches:
-                if package in installed_packages:
-                    yum_base.remove(package)
+            else:
+                installed_packages = yum_base.rpmdb.returnPackages()
+                for package in matches:
+                    if package in installed_packages:
+                        yum_base.remove(package)
+        # install packages
         for pkg_name in options.install or ():
             matches = _find_packages(yum_map, pkg_name)
             if matches is None:
                 cb.yyoom_on_missing_package(pkg_name)
             else:
+                # try to install package from preferred repositories,
+                # if not found - install from default ones
+                repo_matches = [m for m in matches
+                                if m.repoid in options.prefer_repo]
+                matches = repo_matches if repo_matches else matches
                 yum_base.install(max(matches))
 
 
@@ -353,6 +361,10 @@ def _parse_arguments(args):
     parser_run.add_argument('--skip-missing', action='store_true',
                             default=False,
                             help='do not fail on missing packages')
+    parser_run.add_argument('--prefer-repo', '-r', action='append',
+                            metavar='repository',
+                            default=[],
+                            help='preferred repository name')
     parser_run.set_defaults(func=_run, operation='Transaction')
 
     # Arg: srpm