Add --url option to the truffle exec command

packages/core/lib/commands/exec/meta.js

@@ -12,10 +12,15 @@ module.exports = {
     compile: {
       type: "boolean",
       default: false
+    },
+    url: {
+      describe: "Connect to a specified provider given via URL",
+      type: "string"
     }
   },
   help: {
-    usage: "truffle exec <script.js> [--compile]",
+    usage:
+      "truffle exec <script.js> [--compile] [--network <network>|--url <provider_url>]",
     options: [
       {
         option: "<script.js>",
@@ -26,8 +31,18 @@ module.exports = {
       {
         option: "--compile",
         description: "Compile contracts before executing the script."
+      },
+      {
+        option: "--url",
+        description:
+          "Connects to a specified provider given via URL, ignoring networks in config."
+      },
+      {
+        option: "--network",
+        description:
+          "The network to connect to, as specified in the Truffle config."
       }
     ],
-    allowedGlobalOptions: ["network", "config"]
+    allowedGlobalOptions: ["config"]
   }
 };

packages/core/lib/commands/exec/run.js

@@ -1,14 +1,27 @@
 module.exports = async function (options) {
-  const Config = require("@truffle/config");
   const WorkflowCompile = require("@truffle/workflow-compile").default;
   const ConfigurationError = require("../../errors/configurationerror");
   const exec = require("@truffle/require").exec;
   const { Environment } = require("@truffle/environment");
   const path = require("path");
   const OS = require("os");
   const { promisify } = require("util");
+  const loadConfig = require("../../loadConfig");
+  const TruffleError = require("@truffle/error");
 
-  const config = Config.detect(options);
+  if (options.url && options.network) {
+    const message =
+      "" +
+      "Mutually exclusive options, --url and --network detected!" +
+      OS.EOL +
+      "Please use either --url or --network and try again." +
+      OS.EOL +
+      "See: https://trufflesuite.com/docs/truffle/reference/truffle-commands/#exec" +
+      OS.EOL;
+    throw new TruffleError(message);
+  }
+
+  const config = loadConfig(options);
 
   let file = options.file;
 

packages/truffle/test/scenarios/commands/exec.js

@@ -58,4 +58,21 @@ describe("truffle exec [ @standalone ]", function () {
     const output = logger.contents();
     assert(output.includes("5"));
   });
+
+  it("runs script when --url option is passed", async function () {
+    this.timeout(30000);
+    await CommandRunner.run("compile", config);
+    assert(
+      fs.existsSync(
+        path.join(config.contracts_build_directory, "Executable.json")
+      )
+    );
+
+    await CommandRunner.run(
+      "exec script.js --url http://127.0.0.1:8545",
+      config
+    );
+    const output = logger.contents();
+    assert(output.includes("5"));
+  });
 });