text: add sorting

Signed-off-by: Nick Van Wiggeren <[email protected]>

Author: nickvanw

go/cmd/vtctldclient/command/vreplication/vdiff/vdiff.go

@@ -439,7 +439,7 @@ HasMismatch:  {{.HasMismatch}}
 StartedAt:    {{.StartedAt}}
 {{if (eq .State "started")}}Progress:     {{printf "%.2f" .Progress.Percentage}}%{{if .Progress.ETA}}, ETA: {{.Progress.ETA}}{{end}}{{end}}
 {{if .CompletedAt}}CompletedAt:  {{.CompletedAt}}{{end}}
-{{range $table := .TableSummaryMap}} 
+{{range $table := .SortedTableSummaries}}
 Table {{$table.TableName}}:
 	State:            {{$table.State}}
 	ProcessedRows:    {{$table.RowsCompared}}

go/vt/vtctl/workflow/vdiff.go

@@ -69,6 +69,22 @@ type Summary struct {
 	Progress *vdiff.ProgressReport `json:"Progress,omitempty"`
 }
 
+// SortedTableSummaries returns the table summaries sorted alphabetically by table name.
+// This is used by text templates to display tables in a consistent order.
+func (s *Summary) SortedTableSummaries() []TableSummary {
+	names := make([]string, 0, len(s.TableSummaryMap))
+	for name := range s.TableSummaryMap {
+		names = append(names, name)
+	}
+	sort.Strings(names)
+
+	result := make([]TableSummary, 0, len(names))
+	for _, name := range names {
+		result = append(result, s.TableSummaryMap[name])
+	}
+	return result
+}
+
 // BuildSummary generates a summary from a vdiff show response.
 func BuildSummary(keyspace, workflow, uuid string, resp *vtctldatapb.VDiffShowResponse, verbose bool) (*Summary, error) {
 	summary := &Summary{