Have List suggest -W for duplicate jobs (#691)

Co-authored-by: Josh Soref <jsoref@users.noreply.github.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

cmd/list.go

@@ -21,17 +21,26 @@ func printList(plan *model.Plan) error {
 		name:  "Name",
 	}
 
+	jobs := map[string]bool{}
+	duplicateJobIDs := false
+
 	idMaxWidth := len(header.id)
 	stageMaxWidth := len(header.stage)
 	nameMaxWidth := len(header.name)
 
 	for i, stage := range plan.Stages {
 		for _, r := range stage.Runs {
+			jobID := r.JobID
 			line := lineInfoDef{
-				id:    r.JobID,
+				id:    jobID,
 				stage: strconv.Itoa(i),
 				name:  r.String(),
 			}
+			if _, ok := jobs[jobID]; ok {
+				duplicateJobIDs = true
+			} else {
+				jobs[jobID] = true
+			}
 			lineInfos = append(lineInfos, line)
 			if idMaxWidth < len(line.id) {
 				idMaxWidth = len(line.id)
@@ -53,5 +62,8 @@ func printList(plan *model.Plan) error {
 	for _, line := range lineInfos {
 		fmt.Printf("%*s%*s%*s\n", -idMaxWidth, line.id, -stageMaxWidth, line.stage, -nameMaxWidth, line.name)
 	}
+	if duplicateJobIDs {
+		fmt.Print("\nDetected multiple jobs with the same job name, use `-W` to specify the path to the specific workflow.\n")
+	}
 	return nil
 }