CI: Add new RRC pipeline (#90731)

* CI: Add new RRC pipeline

scripts/drone/events/rrc-patch.star

@@ -0,0 +1,73 @@
+"""
+This module returns all the pipelines used in the event of pushes to an RRC branch.
+"""
+
+load(
+    "scripts/drone/pipelines/integration_tests.star",
+    "integration_tests",
+)
+load(
+    "scripts/drone/pipelines/lint_backend.star",
+    "lint_backend_pipeline",
+)
+load(
+    "scripts/drone/pipelines/lint_frontend.star",
+    "lint_frontend_pipeline",
+)
+load(
+    "scripts/drone/pipelines/test_backend.star",
+    "test_backend",
+)
+load(
+    "scripts/drone/pipelines/test_frontend.star",
+    "test_frontend",
+)
+load(
+    "scripts/drone/steps/lib.star",
+    "enterprise_downstream_step",
+)
+load(
+    "scripts/drone/utils/utils.star",
+    "pipeline",
+)
+
+ver_mode = "rrc"
+trigger = {
+    "ref": {
+        "include": [
+            "refs/tags/rrc*",
+        ],
+    },
+    "branch": [
+        "instant",
+        "fast",
+        "steady",
+        "slow",
+    ],
+}
+
+def rrc_patch_pipelines():
+    pipelines = [
+        test_frontend(trigger, ver_mode),
+        lint_frontend_pipeline(trigger, ver_mode),
+        test_backend(trigger, ver_mode),
+        lint_backend_pipeline(trigger, ver_mode),
+        integration_tests(trigger, prefix = ver_mode, ver_mode = ver_mode),
+        rrc_enterprise_downstream_pipeline(trigger = trigger),
+    ]
+
+    return pipelines
+
+def rrc_enterprise_downstream_pipeline(trigger):
+    # Triggers a downstream pipeline in the grafana-enterprise repository for the rrc branch
+    environment = {"EDITION": "oss"}
+    steps = [
+        enterprise_downstream_step(ver_mode = ver_mode),
+    ]
+    return pipeline(
+        name = "rrc-trigger-downstream",
+        trigger = trigger,
+        steps = steps,
+        depends_on = ["rrc-integration-tests"],
+        environment = environment,
+    )

scripts/drone/steps/lib.star

@@ -172,7 +172,7 @@ def enterprise_downstream_step(ver_mode):
       Drone step.
     """
     repo = "grafana/grafana-enterprise@"
-    if ver_mode == "pr":
+    if ver_mode == "pr" or ver_mode == "rrc":
         repo += "${DRONE_SOURCE_BRANCH}"
     else:
         repo += "main"
@@ -197,6 +197,9 @@ def enterprise_downstream_step(ver_mode):
         step.update({"failure": "ignore"})
         step["settings"]["params"].append("OSS_PULL_REQUEST=${DRONE_PULL_REQUEST}")
 
+    if ver_mode == "rrc":
+        step["settings"]["params"].append("SOURCE_TAG=${DRONE_TAG}")
+
     return step
 
 def validate_modfile_step():