[IMP] runbot: custom triger without branch changes

This allows to configure a custom trigger to use the base commits.
This can be usefull to test a config on a branch that has some changes
to ensure it works proprely.

runbot/models/batch.py

@@ -358,6 +358,7 @@ class Batch(models.Model):
             for commit_link in self.commit_link_ids:
                 commit_link.commit_id = commit_link.commit_id._rebase_on(commit_link.base_commit_id)
         commit_link_by_repos = {commit_link.commit_id.repo_id.id: commit_link for commit_link in self.commit_link_ids}
+        base_commit_link_by_repos = {commit_link.commit_id.repo_id.id: commit_link for commit_link in self.base_reference_batch_id.commit_link_ids}
         version_id = self.bundle_id.version_id.id
         project_id = self.bundle_id.project_id.id
         trigger_customs = {}
@@ -373,6 +374,10 @@ class Batch(models.Model):
             config = trigger_custom.config_id or trigger.config_id
             extra_params = trigger_custom.extra_params or ''
             config_data = dict(trigger.config_data or {}) | dict(trigger_custom.config_data or {})
+            trigger_commit_link_by_repos = commit_link_by_repos
+            if trigger_custom.use_base_commits and self.base_reference_batch_id:
+                trigger_commit_link_by_repos = base_commit_link_by_repos
+            commits_links = [trigger_commit_link_by_repos[repo.id].id for repo in trigger_repos]
             params_value = {
                 'version_id':  version_id,
                 'extra_params': extra_params,
@@ -380,7 +385,7 @@ class Batch(models.Model):
                 'project_id': project_id,
                 'trigger_id': trigger.id,  # for future reference and access rights
                 'config_data': config_data,
-                'commit_link_ids': [(6, 0, [commit_link_by_repos[repo.id].id for repo in trigger_repos])],
+                'commit_link_ids': [(6, 0, commits_links)],
                 'modules': bundle.modules,
                 'dockerfile_id': dockerfile_id,
                 'create_batch_id': self.id,

runbot/models/custom_trigger.py

@@ -9,6 +9,7 @@ class BundleTriggerCustomization(models.Model):
 
     trigger_id = fields.Many2one('runbot.trigger')
     start_mode = fields.Selection([('disabled', 'Disabled'), ('auto', 'Auto'), ('force', 'Force')], required=True, default='auto')
+    use_base_commits = fields.Boolean("Use base commits",  help="Allow to test a trigger without the branch changes", default=False)
     bundle_id = fields.Many2one('runbot.bundle')
     config_id = fields.Many2one('runbot.build.config')
     extra_params = fields.Char("Custom parameters")

runbot/views/bundle_views.xml

@@ -77,6 +77,7 @@
                             <field name="trigger_custom_ids" nolabel="1">
                                 <list editable="bottom">
                                     <field name="start_mode"/>
+                                    <field name="use_base_commits"/>
                                     <field name="trigger_id" domain="[('project_id', '=', parent.project_id)]"/>
                                     <field name="config_id"/>
                                     <field name="extra_params"/>