Wait for the Docker daemon to be ready before starting act runner (#620)

Follow #619.

Wait for the Docker daemon to be ready before starting act runner.

Reviewed-on: https://gitea.com/gitea/act_runner/pulls/620
Co-authored-by: Jason Song <[email protected]>
Co-committed-by: Jason Song <[email protected]>

scripts/s6/act_runner/finish

@@ -1,4 +1,3 @@
 #!/usr/bin/env bash
 
 exec s6-svscanctl -t /etc/s6
-

scripts/s6/act_runner/run

@@ -1,3 +1,5 @@
 #!/usr/bin/env bash
 
+s6-svwait -U /etc/s6/docker
+
 exec run.sh

scripts/s6/docker/data/check

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+if ! docker info &> /dev/null; then
+  echo "Waiting for Docker daemon to start..."
+  exit 1
+fi

scripts/s6/docker/notification-fd

@@ -0,0 +1 @@
+3

scripts/s6/docker/run

@@ -1,3 +1,3 @@
 #!/usr/bin/env bash
 
-exec dockerd-entrypoint.sh
+exec s6-notifyoncheck dockerd-entrypoint.sh