fix: 🐛 update relayer's docker run logic to allow local images (#96)

This PR adds a quick check to see if the image to use for the relayer is
a locally-built one (by checking that it ends with `:local`) and avoids
pulling from Docker Hub if so. This fixes the issue in which we were
unable to run the CLI with a local relayer image since it was always
trying to pull from the corresponding repository which of course didn't
exist for local images.

test/.papi/descriptors/package.json

@@ -1,5 +1,5 @@
 {
-  "version": "0.1.0-autogenerated.14950524012264222870",
+  "version": "0.1.0-autogenerated.4891319136699380765",
   "name": "@polkadot-api/descriptors",
   "files": [
     "dist"

test/cli/handlers/common/relayer.ts

@@ -240,6 +240,9 @@ export const initEthClientPallet = async (
   const addHostParam =
     process.platform === "linux" ? "--add-host host.docker.internal:host-gateway" : "";
 
+  // Opportunistic pull - pull the image from Docker Hub only if it's not a local image
+  const isLocal = relayerImageTag.endsWith(":local");
+
   logger.debug("Generating beacon checkpoint");
   const datastoreHostPath = path.resolve(datastorePath);
   const command = `docker run \
@@ -248,10 +251,10 @@ export const initEthClientPallet = async (
       -v ${datastoreHostPath}:/data \
       --name generate-beacon-checkpoint \
       --platform linux/amd64 \
-      --pull always \
       --workdir /app \
       ${addHostParam} \
       ${launchedNetwork.networkName ? `--network ${launchedNetwork.networkName}` : ""} \
+      ${isLocal ? "" : "--pull always"} \
       ${relayerImageTag} \
       generate-beacon-checkpoint --config beacon-relay.json --export-json`;
   logger.debug(`Running command: ${command}`);

test/cli/handlers/launch/relayer.ts

@@ -191,6 +191,9 @@ export const launchRelayers = async (options: LaunchOptions, launchedNetwork: La
     launchedNetwork
   );
 
+  // Opportunistic pull - pull the image from Docker Hub only if it's not a local image
+  const isLocal = options.relayerImageTag.endsWith(":local");
+
   for (const { configFilePath, name, config, pk } of relayersToStart) {
     try {
       const containerName = `snowbridge-${config.type}-relay`;
@@ -205,8 +208,6 @@ export const launchRelayers = async (options: LaunchOptions, launchedNetwork: La
         "docker",
         "run",
         "-d",
-        "--pull",
-        "always",
         "--platform",
         "linux/amd64",
         "--add-host",
@@ -214,7 +215,8 @@ export const launchRelayers = async (options: LaunchOptions, launchedNetwork: La
         "--name",
         containerName,
         "--network",
-        networkName
+        networkName,
+        ...(isLocal ? [] : ["--pull", "always"])
       ];
 
       const volumeMounts: string[] = ["-v", `${hostConfigFilePath}:${containerConfigFilePath}`];