Add a run task separate from the build task

build-task.sh

@@ -4,5 +4,5 @@ curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain none -y
 export PATH="$HOME/.cargo/bin:$PATH"
 
 cd something-rust
-cargo run --release
+cargo build --release
 gzip -c target/release/something-rust > something-rust.gz

decision-task/curl-artifact.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+curl \
+    --retry 5 \
+    --connect-timeout 10 \
+    --location
+    https://queue.taskcluster.net/v1/task/$1/artifacts/$2

decision-task/run.py

@@ -11,17 +11,27 @@ import taskcluster
 event = json.loads(os.environ["GITHUB_EVENT"])
 print("GitHub event:\n%s\n" % json.dumps(event, sort_keys=True, indent=4, separators=(',', ': ')))
 
+# https://docs.taskcluster.net/docs/reference/workers/docker-worker/docs/features#feature-taskclusterproxy
+queue = taskcluster.Queue(options={"baseUrl": "http://taskcluster/queue/v1/"})
+
+command_prefix = """
+    git clone {event[repository][clone_url]} repo &&
+    cd repo &&
+    git checkout {event[after]} &&
+    """.format(event=event)
+
+def create_task(name, command, artifacts=None, dependencies=None):
     task_id = taskcluster.slugId()
     payload = {
         "taskGroupId": os.environ["DECISION_TASK_ID"],
-    "dependencies": [os.environ["DECISION_TASK_ID"]],
-    "schedulerId": "taskcluster-github",  # FIXME: can we avoid hard-coding this?
+        "dependencies": [os.environ["DECISION_TASK_ID"]] + (dependencies or []),
+        "schedulerId": "taskcluster-github",
         "provisionerId": "aws-provisioner-v1",
         "workerType": "github-worker",
         "created": taskcluster.fromNowJSON(""),
         "deadline": taskcluster.fromNowJSON("1 hour"),
         "metadata": {
-        "name": "Taskcluster experiments for Servo: Child task",
+            "name": "Taskcluster experiments for Servo: " + name,
             "description": "",
             "owner": event["pusher"]["name"] + "@users.noreply.github.com",
             "source": event["compare"],
@@ -33,23 +43,29 @@ payload = {
                 "/bin/bash",
                 "--login",
                 "-c",
-            """
-                git clone {event[repository][clone_url]} repo &&
-                cd repo &&
-                git checkout {event[after]} &&
-                ./child-task.sh
-            """.format(event=event),
+                command_prefix + command
             ],
             "artifacts": {
-            "public/executable.gz": {
+                "public/" + artifact_name: {
                     "type": "file",
-                "path": "/repo/something-rust/something-rust.gz",
+                    "path": path,
                     "expires": taskcluster.fromNowJSON("1 week"),
-            },
+                }
+                for artifact_name, path in artifacts or []
             },
         },
     }
-# https://docs.taskcluster.net/docs/reference/workers/docker-worker/docs/features#feature-taskclusterproxy
-queue = taskcluster.Queue(options={"baseUrl": "http://taskcluster/queue/v1/"})
     queue.createTask(task_id, payload)
-print("new task scheduled: " + task_id)
+    print("Scheduled %s: %s" % (name, task_id))
+    return task_id
+
+build_task = create_task(
+    "build task",
+    "./build-task.sh",
+    artifacts=[("executable.gz", "/repo/something-rust/something-rust.gz")],
+)
+create_task(
+    "run task",
+    "./run-task.sh",
+    dependencies=[build_task],
+)

run-task.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+./curl-artifact.sh $BUILD_TASK_ID public/executable.gz -o executable.gz
+gunzip executable.gz
+./executable