plugin hooks for repo modification

Fixes: https://pagure.io/koji/issue/2636

builder/kojid

@@ -5458,6 +5458,10 @@ class CreaterepoTask(BaseTaskHandler):
             with open(os.path.join(self.datadir, "EMPTY_REPO"), 'wt') as fo:
                 fo.write("This repo is empty because its tag has no content for this arch\n")
 
+        tag = self.session.getTag(rinfo['tag_id'], event=rinfo['create_event'], strict=True)['name']
+        self.run_callbacks('postCreateRepo', tag=tag, repodir=self.outdir,
+                           repo_id=self.repo_id, arch=arch)
+
         uploadpath = self.getUploadDir()
         files = []
         for f in os.listdir(self.datadir):
@@ -5758,6 +5762,9 @@ class createDistRepoTask(BaseTaskHandler):
                 fp.write("This repo is empty because its tag has no content "
                          "for this arch\n")
 
+        self.run_callbacks('postCreateDistRepo', tag=tag, repodir=self.repodir,
+                           repo_id=repo_id, arch=arch, keys=keys, opts=opts)
+
         # upload repo files
         self.upload_repo()
         self.upload_repo_manifest()

docs/source/writing_a_plugin.rst

@@ -216,6 +216,8 @@ builder:
 
 - preSCMCheckout
 - postSCMCheckout
+- postCreateDistRepo
+- postCreateRepo
 
 .. _plugin-cli-command:
 

koji/plugin.py

@@ -34,6 +34,7 @@ from koji.util import encode_datetime_recurse
 # the available callback hooks and a list
 # of functions to be called for each event
 callbacks = {
+    # hub
     'prePackageListChange': [],
     'postPackageListChange': [],
     'preTaskStateChange': [],
@@ -54,8 +55,11 @@ callbacks = {
     'postRepoDone': [],
     'preCommit': [],
     'postCommit': [],
+    # builder
     'preSCMCheckout': [],
     'postSCMCheckout': [],
+    'postCreateDistRepo': [],
+    'postCreateRepo': [],
 }