table: custom alignment on merged cells; addresses #207

Makefile

@@ -5,7 +5,7 @@ default: test
 all: test bench
 
 tools:
-	go get github.com/fzipp/gocyclo
+	go install github.com/fzipp/gocyclo/cmd/gocyclo@v0.5.1
 
 bench:
 	go test -bench=. -benchmem

table/config.go

@@ -85,8 +85,19 @@ func (c ColumnConfig) getWidthMaxEnforcer() WidthEnforcer {
 type RowConfig struct {
 	// AutoMerge merges cells with similar values and prevents separators from
 	// being drawn. Caveats:
-	// * Align is overridden to text.AlignCenter on the merged cell
+	// * Align is overridden to text.AlignCenter on the merged cell (unless set
+	//   by AutoMergeAlign value below)
 	// * Does not work in CSV/HTML/Markdown render modes
 	// * Does not work well with vertical auto-merge (ColumnConfig.AutoMerge)
 	AutoMerge bool
+
+	// Alignment to use on a merge (defaults to text.AlignCenter)
+	AutoMergeAlign text.Align
+}
+
+func (rc RowConfig) getAutoMergeAlign() text.Align {
+	if rc.AutoMergeAlign == text.AlignDefault {
+		return text.AlignCenter
+	}
+	return rc.AutoMergeAlign
 }

table/render.go

@@ -78,12 +78,13 @@ func (t *Table) renderColumn(out *strings.Builder, row rowStr, colIdx int, maxCo
 	// if horizontal cell merges are enabled, look ahead and see how many cells
 	// have the same content and merge them all until a cell with a different
 	// content is found; override alignment to Center in this case
-	if t.getRowConfig(hint).AutoMerge && !hint.isSeparatorRow {
+	rowConfig := t.getRowConfig(hint)
+	if rowConfig.AutoMerge && !hint.isSeparatorRow {
 		for idx := colIdx + 1; idx < len(row); idx++ {
 			if row[colIdx] != row[idx] {
 				break
 			}
-			align = text.AlignCenter
+			align = rowConfig.getAutoMergeAlign()
 			maxColumnLength += t.getMaxColumnLengthForMerging(idx)
 			numColumnsRendered++
 		}

table/render_test.go

@@ -318,7 +318,7 @@ func TestTable_Render_AutoMerge_RowsOnly(t *testing.T) {
 	tw.AppendRow(Row{"1.1.1.1", "Pod 1B", "NS 2", "C 4", "N", "N"}, RowConfig{AutoMerge: true})
 	tw.AppendRow(Row{"1.1.1.1", "Pod 1B", "NS 2", "C 5", "Y", "N"})
 	tw.AppendRow(Row{"2.2.2.2", "Pod 2", "NS 3", "C 6", "Y", "Y"}, RowConfig{AutoMerge: true})
-	tw.AppendRow(Row{"2.2.2.2", "Pod 2", "NS 3", "C 7", "Y", "Y"}, RowConfig{AutoMerge: true})
+	tw.AppendRow(Row{"2.2.2.2", "Pod 2", "NS 3", "C 7", "Y", "Y"}, RowConfig{AutoMerge: true, AutoMergeAlign: text.AlignRight})
 	tw.AppendFooter(Row{"", "", "", 7, 5, 3})
 	tw.SetAutoIndex(true)
 	tw.SetColumnConfigs([]ColumnConfig{
@@ -345,7 +345,7 @@ func TestTable_Render_AutoMerge_RowsOnly(t *testing.T) {
 ├───┼─────────┼────────┼───────────┼───────────┼─────┴─────┤
 │ 6 │ 2.2.2.2 │ Pod 2  │ NS 3      │ C 6       │     Y     │
 ├───┼─────────┼────────┼───────────┼───────────┼───────────┤
-│ 7 │ 2.2.2.2 │ Pod 2  │ NS 3      │ C 7       │     Y     │
+│ 7 │ 2.2.2.2 │ Pod 2  │ NS 3      │ C 7       │         Y │
 ├───┼─────────┼────────┼───────────┼───────────┼─────┬─────┤
 │   │         │        │           │ 7         │  5  │  3  │
 └───┴─────────┴────────┴───────────┴───────────┴─────┴─────┘`