Always generate rpms.json file

Even if gather phase is skipped, it will still generate a rpms.json
metadata file. It will have no payload, but the header structure is
there.

Createrepo phase had to be updated to ignore variants that have no RPMs
listed in metadata.

There is one more fix for writing treeinfo files: if repomd.xml files
are not generated, it will no longer crash.

Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>

pungi/metadata.py

@@ -244,6 +244,7 @@ def write_tree_info(compose, arch, variant, timestamp=None):
     ti.variants.add(var)
 
     repomd_path = os.path.join(var.repository, "repodata", "repomd.xml")
+    if os.path.isfile(repomd_path):
         ti.checksums.add(repomd_path, "sha256", root_dir=os_tree)
 
     for i in variant.get_variants(types=["addon"], arch=arch):
@@ -259,6 +260,7 @@ def write_tree_info(compose, arch, variant, timestamp=None):
         var.add(addon)
 
         repomd_path = os.path.join(addon.repository, "repodata", "repomd.xml")
+        if os.path.isfile(repomd_path):
             ti.checksums.add(repomd_path, "sha256", root_dir=os_tree)
 
     class LoraxProduct(productmd.treeinfo.Release):

pungi/phases/createrepo.py

@@ -155,7 +155,7 @@ def create_variant_repo(compose, arch, variant, pkg_type):
     manifest = productmd.rpms.Rpms()
     manifest.load(manifest_file)
 
-    for rpms_arch, data in manifest.rpms[variant.uid].iteritems():
+    for rpms_arch, data in manifest.rpms.get(variant.uid, {}).iteritems():
         if arch is not None and arch != rpms_arch:
             continue
         for srpm_data in data.itervalues():

pungi/phases/gather/__init__.py

@@ -114,6 +114,13 @@ class GatherPhase(PhaseBase):
         PhaseBase.__init__(self, compose)
         # pkgset_phase provides package_sets and path_prefix
         self.pkgset_phase = pkgset_phase
+        # Prepare empty manifest
+        self.manifest_file = self.compose.paths.compose.metadata("rpms.json")
+        self.manifest = Rpms()
+        self.manifest.compose.id = self.compose.compose_id
+        self.manifest.compose.type = self.compose.compose_type
+        self.manifest.compose.date = self.compose.compose_date
+        self.manifest.compose.respin = self.compose.compose_respin
 
     @staticmethod
     def check_deps():
@@ -124,22 +131,24 @@ class GatherPhase(PhaseBase):
         for i in ["release_name", "release_short", "release_version"]:
             errors.append(self.conf_assert_str(i))
 
-    def run(self):
+    def _write_manifest(self):
-        pkg_map = gather_wrapper(self.compose, self.pkgset_phase.package_sets, self.pkgset_phase.path_prefix)
+        self.compose.log_info("Writing RPM manifest: %s" % self.manifest_file)
+        self.manifest.dump(self.manifest_file)
 
-        manifest_file = self.compose.paths.compose.metadata("rpms.json")
+    def run(self):
-        manifest = Rpms()
+        pkg_map = gather_wrapper(self.compose, self.pkgset_phase.package_sets,
-        manifest.compose.id = self.compose.compose_id
+                                 self.pkgset_phase.path_prefix)
-        manifest.compose.type = self.compose.compose_type
-        manifest.compose.date = self.compose.compose_date
-        manifest.compose.respin = self.compose.compose_respin
 
         for arch in self.compose.get_arches():
             for variant in self.compose.get_variants(arch=arch):
-                link_files(self.compose, arch, variant, pkg_map[arch][variant.uid], self.pkgset_phase.package_sets, manifest=manifest)
+                link_files(self.compose, arch, variant,
+                           pkg_map[arch][variant.uid],
+                           self.pkgset_phase.package_sets,
+                           manifest=self.manifest)
 
-        self.compose.log_info("Writing RPM manifest: %s" % manifest_file)
+    def stop(self):
-        manifest.dump(manifest_file)
+        self._write_manifest()
+        super(GatherPhase, self).stop()
 
 
 def get_parent_pkgs(arch, variant, result_dict):