feat: pull request backporting

feat: backport still open pull requests

src/service/args/cli/cli-args-parser.ts

@@ -0,0 +1,34 @@
+import ArgsParser from "@bp/service/args/args-parser";
+import { Args } from "@bp/service/args/args.types";
+import { Command } from "commander";
+import { name, version, description } from "@bp/../package.json";
+
+
+export default class CLIArgsParser implements ArgsParser {
+
+  private getCommand(): Command {
+    return new Command(name)
+      .version(version)
+      .description(description)
+      .requiredOption("-tb, --target-branch <branch>", "branch where changes must be backported to.")
+      .requiredOption("-pr, --pull-request <pr url>", "pull request url, e.g., https://github.com/lampajr/backporting/pull/1.")
+      .option("-d, --dry-run", "if enabled the tool does not create any pull request nor push anything remotely", false)
+      .option("-a, --auth <auth>", "git service authentication string, e.g., github token.", "")
+      .option("-f, --folder <folder>", "local folder where the repo will be checked out, e.g., /tmp/folder.", undefined);
+  }
+
+  parse(): Args {
+    const opts = this.getCommand()
+      .parse()
+      .opts();
+    
+    return {
+      dryRun: opts.dryRun,
+      auth: opts.auth,
+      pullRequest: opts.pullRequest,
+      targetBranch: opts.targetBranch,
+      folder: opts.folder
+    };
+  }
+
+}