Add similar rollup creation link to PR

Author: oliviacrain

cfg.production.toml

@@ -18,6 +18,7 @@ ${HOMU_SSH_KEY}
 host = '0.0.0.0'
 port = 80
 
+base_url = "https://bors.rust-lang.org"
 canonical_url = "https://bors.rust-lang.org"
 remove_path_prefixes = ["homu"]
 

cfg.sample.toml

@@ -51,6 +51,12 @@ port = 54856
 # all open PRs.
 sync_on_start = true
 
+# The base url used for links pointing to this homu instance.
+# If base_url is not present, links will use canonical_url as a fallback.
+# If neither base_url nor canonical_url are present, no links to this homu
+# instance will be generated.
+#base_url = "https://bors.example.com"
+
 # The canonical URL of this homu instance. If a user reaches the instance
 # through a different path they will be redirected. If this is not present in
 # the configuration homu will still work, but no redirect will be performed.

homu/html/queue.html

@@ -187,9 +187,14 @@ <h1>Homu queue - {% if repo_url %}<a href="{{repo_url}}" target="_blank">{{repo_
 
             <tbody>
                 {% for state in states %}
+                {% set checkbox_state =
+                    ('checked' if state.prechecked else '') if
+                        ((state.status == 'approved' or (state.status == 'pending' and not state.try_)) and state.rollup != 'never')
+                    else 'disabled'
+                %}
                 <tr class="{{state.greyed}}">
                     <td class="hide">{{loop.index}}</td>
-                    <td><input type="checkbox" data-num="{{state.num}}" {{ '' if ((state.status == 'approved' or (state.status == 'pending' and not state.try_)) and state.rollup != 'never') else 'disabled' }}></td>
+                    <td><input type="checkbox" data-num="{{state.num}}" {{checkbox_state}}></td>
                     {% if multiple %}
                     <td><a href="{{state.repo_url}}">{{state.repo_label}}</a></td>
                     {% endif %}

homu/server.py

@@ -139,6 +139,10 @@ def queue(repo_label):
         except KeyError:
             abort(404, 'No such repository: {}'.format(label))
 
+    prechecked_prs = set()
+    if request.query.get('prs'):
+        prechecked_prs = set(request.query.get('prs').split(','))
+
     pull_states = sorted(states)
     rows = []
     for state in pull_states:
@@ -154,6 +158,7 @@ def queue(repo_label):
             'status_ext': status_ext,
             'priority': state.priority,
             'rollup': ROLLUP_STR.get(state.rollup, ''),
+            'prechecked': str(state.num) in prechecked_prs,
             'url': 'https://github.com/{}/{}/pull/{}'.format(state.owner,
                                                              state.name,
                                                              state.num),
@@ -329,6 +334,16 @@ def rollup(user_gh, state, repo_label, repo_cfg, repo):
         body += ' - #{} ({})\n'.format(x.num, x.title)
     body += '\nr? @ghost'
 
+    # Set web.base_url in cfg to enable
+    base_url = g.cfg['web'].get('base_url')
+    if not base_url:
+        # If web.base_url is not present, fall back to using web.canonical_url
+        base_url = g.cfg['web'].get('canonical_url')
+
+    if base_url:
+        pr_list = ','.join(x.num for x in successes)
+        body += '\n\n[Create a similar rollup]({}/queue/{}?prs={})'.format(base_url, repo_label, pr_list)
+
     try:
         pull = base_repo.create_pull(
             title,