Add lots of linting

packages/core/src/command.ts

@@ -2,6 +2,10 @@ import * as os from 'os'
 
 // For internal use, subject to change.
 
+interface CommandProperties {
+  [key: string]: string
+}
+
 /**
  * Commands
  *
@@ -14,25 +18,25 @@ import * as os from 'os'
  */
 export function issueCommand(
   command: string,
-  properties: any,
+  properties: CommandProperties,
   message: string
-) {
+): void {
   const cmd = new Command(command, properties, message)
   process.stdout.write(cmd.toString() + os.EOL)
 }
 
-export function issue(name: string, message: string) {
+export function issue(name: string, message: string): void {
   issueCommand(name, {}, message)
 }
 
 const CMD_PREFIX = '##['
 
 class Command {
-  constructor(
-    command: string,
-    properties: {[key: string]: string},
-    message: string
-  ) {
+  private readonly command: string
+  private readonly message: string
+  private readonly properties: CommandProperties
+
+  constructor(command: string, properties: CommandProperties, message: string) {
     if (!command) {
       command = 'missing.command'
     }
@@ -42,11 +46,7 @@ class Command {
     this.message = message
   }
 
-  command: string
-  message: string
-  properties: {[key: string]: string}
-
-  toString() {
+  toString(): string {
     let cmdStr = CMD_PREFIX + this.command
 
     if (this.properties && Object.keys(this.properties).length > 0) {
@@ -67,7 +67,7 @@ class Command {
 
     // safely append the message - avoid blowing up when attempting to
     // call .replace() if message is not a string for some reason
-    const message: string = `${this.message || ''}`
+    const message = `${this.message || ''}`
     cmdStr += escapeData(message)
 
     return cmdStr