dshackle cli tool

dshackle-cli/src/cli.js

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+import {describe} from "./grpc-clent";
+import arg from 'arg';
+import clc from "cli-color";
+import util from "util";
+
+export function cli(args) {
+    let opts = parseArgumentsIntoOptions(args);
+    if (!opts.url) {
+        console.log("Err: URL not specified!")
+        return
+    }
+    describe(opts.url, (error, response) => {
+        if (error) {
+            console.error(clc.red('Connection to ' + opts.url + ' failed! [' + error.message + ']'));
+        } else {
+            console.error(clc.green('Connected to ', opts.url));
+            if (opts.print) {
+                console.log(util.inspect(response, false, null, true /* enable colors */));
+            } else {
+                response.chains.forEach(function (item) {
+                    var state = item.status.availability;
+
+                    switch (state) {
+                        case 'AVAIL_OK':
+                            state = clc.green(state);
+                            break
+                        case 'AVAIL_UNKNOWN':
+                        case 'AVAIL_UNAVAILABLE':
+                            state = clc.red(state);
+                            break
+                        default:
+                            state = clc.yellow(state);
+                    }
+                    console.log(item.status.chain + ' -> ' + clc.bold(state))
+                })
+            }
+        }
+    })
+}
+
+function parseArgumentsIntoOptions(rawArgs) {
+    const args = arg(
+        {
+            '--print': Boolean,
+            '-p': '--print'
+        },
+        {
+            argv: rawArgs.slice(2),
+        }
+    );
+    return {
+        print: args['--print'] || false,
+        url: args._[0]
+    };
+}
+
+

dshackle-cli/src/grpc-clent.js

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+const grpc = require("@grpc/grpc-js");
+const path = require('path')
+const protoLoader = require("@grpc/proto-loader");
+
+const PROTO_PATH = path.join(__dirname, "../proto/blockchain.proto");
+
+const options = {
+    keepCase: true,
+    longs: String,
+    enums: String,
+    defaults: true,
+    oneofs: true,
+};
+
+const packageDefinition = protoLoader.loadSync(PROTO_PATH, options);
+const emerald = grpc.loadPackageDefinition(packageDefinition).emerald
+
+export function describe(url, handler) {
+    const client = new emerald.Blockchain(
+        url,
+        grpc.credentials.createInsecure()
+    );
+    console.log('Connecting to: ' + url + '...')
+    client.Describe({}, handler);
+}