mr show: Display output for approvers and reviewers

Several users have requested that the list of approvers and reviewers be
added to the output of the 'lab mr show' command.  This list is useful for
authors to know who to request reviews from, and to see the eligible list
of approvers.

Add Approvers, Approval Groups, and Reviewers to the output of 'lab mr
show'.

Signed-off-by: Prarit Bhargava <prarit@redhat.com>

Author: prarit

cmd/mr_show.go

@@ -124,13 +124,18 @@ func printMR(mr *gitlab.MergeRequest, project string, renderMarkdown bool) {
 	milestone := "None"
 	labels := "None"
 	approvedByUsers := "None"
+	approvers := "None"
+	approverGroups := "None"
+	reviewers := "None"
 	subscribed := "No"
 	state := map[string]string{
 		"opened": "Open",
 		"closed": "Closed",
 		"merged": "Merged",
 	}[mr.State]
 
+	var _tmpStringArray []string
+
 	if state == "Open" && mr.MergeStatus == "cannot_be_merged" {
 		state = "Open (Needs Rebase)"
 	}
@@ -158,12 +163,47 @@ func printMR(mr *gitlab.MergeRequest, project string, renderMarkdown bool) {
 		log.Fatal(err)
 	}
 
-	approvedBys, err := lab.GetMRApprovedBys(project, mr.IID)
+	approvalConfig, err := lab.GetMRApprovalsConfiguration(project, mr.IID)
 	if err != nil {
 		log.Fatal(err)
 	}
-	if len(approvedBys) > 0 {
-		approvedByUsers = strings.Join(approvedBys, ", ")
+
+	for _, approvedby := range approvalConfig.ApprovedBy {
+		_tmpStringArray = append(_tmpStringArray, approvedby.User.Username)
+	}
+	if len(_tmpStringArray) > 0 {
+		approvedByUsers = strings.Join(_tmpStringArray, ", ")
+		_tmpStringArray = nil
+	}
+
+	// An argument could be made to separate these two fields into their own
+	// entries, however, at a high level they essentially the users that can
+	// approve the MR
+	for _, approvers := range approvalConfig.Approvers {
+		_tmpStringArray = append(_tmpStringArray, approvers.User.Username)
+	}
+	for _, suggestedApprovers := range approvalConfig.SuggestedApprovers {
+		_tmpStringArray = append(_tmpStringArray, suggestedApprovers.Username)
+	}
+	if len(_tmpStringArray) > 0 {
+		approvers = strings.Join(_tmpStringArray, ", ")
+		_tmpStringArray = nil
+	}
+
+	for _, approversGroups := range approvalConfig.ApproverGroups {
+		_tmpStringArray = append(_tmpStringArray, approversGroups.Group.Name)
+	}
+	if len(_tmpStringArray) > 0 {
+		approverGroups = strings.Join(_tmpStringArray, ", ")
+		_tmpStringArray = nil
+	}
+
+	for _, reviewerUsers := range mr.Reviewers {
+		_tmpStringArray = append(_tmpStringArray, reviewerUsers.Name)
+	}
+	if len(_tmpStringArray) > 0 {
+		reviewers = strings.Join(_tmpStringArray, ", ")
+		_tmpStringArray = nil
 	}
 
 	if mr.Subscribed {
@@ -181,15 +221,18 @@ Status: %s
 Assignee: %s
 Author: %s
 Approved By: %s
+Approvers: %s
+Approval Groups: %s
+Reviewers: %s
 Milestone: %s
 Labels: %s
 Issues Closed by this MR: %s
 Subscribed: %s
 WebURL: %s
 `,
 		mr.IID, mr.Title, mr.Description, project, mr.SourceBranch,
-		mr.TargetBranch, state, assignee,
-		mr.Author.Username, approvedByUsers, milestone, labels,
+		mr.TargetBranch, state, assignee, mr.Author.Username,
+		approvedByUsers, approvers, approverGroups, reviewers, milestone, labels,
 		strings.Trim(strings.Replace(fmt.Sprint(closingIssues), " ", ",", -1), "[]"),
 		subscribed, mr.WebURL,
 	)

cmd/mr_show_test.go

@@ -35,6 +35,9 @@ Status: Open
 Assignee: zaquestion
 Author: zaquestion
 Approved By: None
+Approvers: None
+Approval Groups: None
+Reviewers: None
 Milestone: 1.0
 Labels: documentation
 Issues Closed by this MR: 

internal/gitlab/gitlab.go

@@ -1635,24 +1635,18 @@ func MoveIssue(project string, issueNum int, dest string) (string, error) {
 	return fmt.Sprintf("%s/issues/%d", destProject.WebURL, issue.IID), nil
 }
 
-func GetMRApprovedBys(project string, mrNum int) ([]string, error) {
-	var retArray []string
-
+func GetMRApprovalsConfiguration(project string, mrNum int) (*gitlab.MergeRequestApprovals, error) {
 	p, err := FindProject(project)
 	if err != nil {
-		return retArray, err
+		return nil, err
 	}
 
 	configuration, _, err := lab.MergeRequestApprovals.GetConfiguration(p.ID, mrNum)
 	if err != nil {
-		return retArray, err
-	}
-
-	for _, approvedby := range configuration.ApprovedBy {
-		retArray = append(retArray, approvedby.User.Username)
+		return nil, err
 	}
 
-	return retArray, err
+	return configuration, err
 }
 
 func ResolveMRDiscussion(project string, mrNum int, discussionID string, noteID int) (string, error) {