feat(issue-41): set and inherit labels (#48)

fix https://github.com/kiegroup/git-backporting/issues/41

src/service/git/git.types.ts

@@ -10,6 +10,7 @@ export interface GitPullRequest {
   body: string,
   reviewers: string[],
   assignees: string[],
+  labels: string[],
   targetRepo: GitRepository,
   sourceRepo: GitRepository,
   nCommits?: number, // number of commits in the pr
@@ -32,6 +33,7 @@ export interface BackportPullRequest {
   body: string, // pr body
   reviewers: string[], // pr list of reviewers
   assignees: string[], // pr list of assignees
+  labels: string[], // pr list of assigned labels
   branchName?: string,
 }
 

src/service/git/github/github-client.ts

@@ -59,13 +59,26 @@ export default class GitHubClient implements GitClient {
       head: backport.head,
       base: backport.base,
       title: backport.title,
-      body: backport.body
+      body: backport.body,
     });
 
     if (!data) {
       throw new Error("Pull request creation failed");
     }
 
+    if (backport.labels.length > 0) {
+      try {
+        await this.octokit.issues.addLabels({
+          owner: backport.owner,
+          repo: backport.repo,
+          issue_number: (data as PullRequest).number,
+          labels: backport.labels,
+        });
+      } catch (error) {
+        this.logger.error(`Error setting labels: ${error}`);
+      }
+    }
+
     if (backport.reviewers.length > 0) {
       try {
         await this.octokit.pulls.requestReviewers({

src/service/git/github/github-mapper.ts

@@ -26,6 +26,7 @@ export default class GitHubMapper implements GitResponseMapper<PullRequest, "ope
       mergedBy: pr.merged_by?.login,
       reviewers: pr.requested_reviewers.filter(r => "login" in r).map((r => (r as User)?.login)),
       assignees: pr.assignees.filter(r => "login" in r).map(r => r.login),
+      labels: pr.labels.map(l => l.name),
       sourceRepo: await this.mapSourceRepo(pr),
       targetRepo: await this.mapTargetRepo(pr),
       nCommits: pr.commits,

src/service/git/gitlab/gitlab-client.ts

@@ -72,6 +72,18 @@ export default class GitLabClient implements GitClient {
     
     const mr = data as MergeRequestSchema;
 
+    // labels
+    if (backport.labels.length > 0) {
+      try {
+        this.logger.info("Setting labels: " + backport.labels);
+        await this.client.put(`/projects/${projectId}/merge_requests/${mr.iid}`, {
+          labels: backport.labels.join(","),
+        });
+      } catch(error) {
+        this.logger.warn("Failure trying to update labels. " + error);
+      }
+    }
+
     // reviewers
     const reviewerIds: number[] = [];
     for(const r of backport.reviewers) {

src/service/git/gitlab/gitlab-mapper.ts

@@ -25,7 +25,6 @@ export default class GitLabMapper implements GitResponseMapper<MergeRequestSchem
   }
   
   async mapPullRequest(mr: MergeRequestSchema): Promise<GitPullRequest> {
-    // throw new Error("Method not implemented.");
     return {
       number: mr.iid,
       author: mr.author.username,
@@ -38,6 +37,7 @@ export default class GitLabMapper implements GitResponseMapper<MergeRequestSchem
       mergedBy: mr.merged_by?.username,
       reviewers: mr.reviewers?.map((r => r.username)) ?? [],
       assignees: mr.assignees?.map((r => r.username)) ?? [],
+      labels: mr.labels ?? [],
       sourceRepo: await this.mapSourceRepo(mr),
       targetRepo: await this.mapTargetRepo(mr),
       nCommits: 1, // info not present on mr