added GRM discard action

src/tasks/gitreleasemanager/discard.ts

@@ -0,0 +1,4 @@
+import "reflect-metadata";
+import { discard } from "./main";
+
+discard();

src/tasks/gitreleasemanager/main.ts

@@ -38,4 +38,19 @@ export async function create() {
     } catch (error) {
         buildAgent.setFailed(error.message, true);
     }
+}
+
+export async function discard() {
+    try {
+
+        gitReleaseManagerTool.disableTelemetry();
+
+        const settings = Settings.getDiscardSettings(buildAgent);
+
+        await gitReleaseManagerTool.discard(settings);
+
+        buildAgent.setSucceeded("GitVersionManager discarded release successfully", true);
+    } catch (error) {
+        buildAgent.setFailed(error.message, true);
+    }
 }

src/tools/gitreleasemanager/gitreleasemanager-tool.ts

@@ -3,12 +3,18 @@ import path = require("path");
 import { TYPES, IBuildAgent, IExecResult } from "../../core/models";
 import { injectable, inject } from "inversify";
 import { DotnetTool, IDotnetTool } from "../../core/dotnet-tool";
-import { GitReleaseManagerCreateSettings, GitReleaseManagerSettings, CreateFields, CommonFields } from "./models";
 import { IVersionManager } from "../../core/versionManager";
 
+import {
+    GitReleaseManagerSettings,
+    GitReleaseManagerCreateSettings,
+    GitReleaseManagerDiscardSettings
+} from "./models";
+
 export interface IGitReleaseManagerTool extends IDotnetTool {
     install(versionSpec: string, includePrerelease: boolean): Promise<void>;
     create(settings: GitReleaseManagerCreateSettings): Promise<IExecResult>;
+    discard(settings: GitReleaseManagerDiscardSettings): Promise<IExecResult>;
 }
 
 @injectable()
@@ -31,6 +37,12 @@ export class GitReleaseManagerTool extends DotnetTool implements IGitReleaseMana
         return this.execute("dotnet-gitreleasemanager", args);
     }
 
+    public discard(settings: GitReleaseManagerDiscardSettings): Promise<IExecResult> {
+        const args = this.getDiscardArguments(settings);
+
+        return this.execute("dotnet-gitreleasemanager", args);
+    }
+
     getCommonArguments(settings: GitReleaseManagerSettings): string[] {
         const args: string[] = [];
 
@@ -41,6 +53,19 @@ export class GitReleaseManagerTool extends DotnetTool implements IGitReleaseMana
         return args;
     }
 
+    getDiscardArguments(settings: GitReleaseManagerDiscardSettings): string[] {
+        const args: string[] = ['discard', ...this.getCommonArguments(settings)];
+
+        if (settings.milestone) {
+            args.push("--milestone", settings.milestone);
+        }
+        if (settings.targetDirectory) {
+            args.push("--targetDirectory", settings.targetDirectory);
+        }
+
+        return args;
+    }
+
     getCreateArguments(settings: GitReleaseManagerCreateSettings): string[] {
         const args: string[] = ['create', ...this.getCommonArguments(settings)];
 

src/tools/gitreleasemanager/models.ts

@@ -14,6 +14,11 @@ export enum CreateFields {
     assets = "assets",
 }
 
+export enum DiscardFields {
+    milestone = "milestone",
+    targetDirectory = "targetDirectory",
+}
+
 export interface GitReleaseManagerSettings {
     [CommonFields.repository]: string;
     [CommonFields.owner]: string;
@@ -28,4 +33,9 @@ export interface GitReleaseManagerCreateSettings extends GitReleaseManagerSettin
     [CreateFields.commit]: string;
     [CreateFields.targetDirectory]: string;
     [CreateFields.assets]?: string[];
+}
+
+export interface GitReleaseManagerDiscardSettings extends GitReleaseManagerSettings {
+    [DiscardFields.milestone]: string;
+    [DiscardFields.targetDirectory]: string;
 }

src/tools/gitreleasemanager/settings.ts

@@ -1,5 +1,5 @@
 import { IBuildAgent } from "../../core/models";
-import { GitReleaseManagerSettings, CommonFields, CreateFields, GitReleaseManagerCreateSettings } from "./models";
+import { GitReleaseManagerSettings, CommonFields, CreateFields, GitReleaseManagerCreateSettings, DiscardFields, GitReleaseManagerDiscardSettings } from "./models";
 
 export class Settings {
 
@@ -25,6 +25,18 @@ export class Settings {
         }
     }
 
+    public static getDiscardSettings(buildAgent: IBuildAgent) : GitReleaseManagerDiscardSettings {
+        const milestone = buildAgent.getInput(DiscardFields.milestone);
+        const targetDirectory = buildAgent.getInput(CreateFields.targetDirectory);
+
+        const commonSettings = Settings.getCommonSettings(buildAgent);
+        return {
+            ...commonSettings,
+            milestone,
+            targetDirectory,
+        }
+    }
+
     private static getCommonSettings(buildAgent: IBuildAgent): GitReleaseManagerSettings {
         const owner = buildAgent.getInput(CommonFields.owner, true);
         const repository = buildAgent.getInput(CommonFields.repository, true);