feat: add showTotalChanges

README.md

@@ -163,6 +163,7 @@ Please check the above setup example to use this action with `pull_request_targe
 | `percent_extra_attention` | `20`                                  | If an out file size has increased more than this percent, display a "‼️" to draw extra attention to the change.  |
 | `show_details`            | `true`                                | If `true`, a collapsed "details" section is rendered. It explains the details of the numbers provided and icons. |
 | `show_no_change`          | `true`                               | If `true`, all bundles are shown in the analysis regardless of size change. If `false`, only bundles with size changes are shown. |
+| `show_total_changes`      | `false`                               | If `true`, the cumulative number of changes in bundle sizes is rendered.                                         |
 | `top_n_largest_paths`     | `20`                                  | The number of largest paths (e.g.) `node_modules/foo`) to be collected. If 0 or lower, skipped.                  |
 
 ## Action outputs

__tests__/no-base.test.ts

@@ -23,6 +23,7 @@ describe("examples w/o base analysis", () => {
 				showDetails: false,
 				showNoChange: true,
 				topNLargestPaths: 10,
+				showTotalChanges: false,
 			};
 
 			beforeEach(() => {

__tests__/with-base.test.ts

@@ -35,6 +35,7 @@ describe("examples w/ base analysis", () => {
 				showDetails: false,
 				showNoChange: isEven,
 				topNLargestPaths: 10,
+				showTotalChanges: isEven,
 			};
 
 			beforeEach(() => {
@@ -60,8 +61,10 @@ describe("examples w/ base analysis", () => {
 				expect(comment).toMatch(/✅ {2}No change/i);
 				if (isEven) {
 					expect(comment).not.toMatch(/\d bundles with no change are hidden./i);
+					expect(comment).toMatch(/\(Total\) \| - \|.+⚠️/i);
 				} else {
 					expect(comment).toMatch(/\d bundles with no change are hidden./i);
+					expect(comment).not.toMatch(/\(Total\) \| - \|.+⚠️/i);
 				}
 				expect(comment).toMatch(/🆕 Added/i);
 				expect(comment).toMatch(/🗑️ Deleted/i);

action.yaml

@@ -49,6 +49,11 @@ inputs:
     description: |
       If an out file size has increased more than this percent, display a "‼️" to draw attention
       to the change.
+  show_total_changes:
+    required: false
+    default: "false"
+    description: |
+      If `true`, the cumulative number of changes in bundle sizes is rendered.
   show_details:
     required: false
     default: "true"

src/compare.ts

@@ -72,6 +72,7 @@ This analysis was generated by [esbuild-bundle-analyzer](https://github.com/exoe
 		output += markdownTable(
 			comparison,
 			input.percentExtraAttention,
+			input.showTotalChanges,
 			input.showNoChange,
 		);
 		output += noChangesTable(comparison, input.showNoChange);
@@ -228,10 +229,33 @@ const shouldShowBundle = (d: CompareResult, showNoChange: boolean) =>
 function markdownTable(
 	data: Array<CompareResult>,
 	redThreshold: number,
+	showTotalChanges: boolean,
 	showNoChange: boolean,
 ): string {
-	const rows = data
-		.filter((d) => shouldShowBundle(d, showNoChange))
+	const totalRow = data.reduce(
+		(acc, d) => {
+			const { bytes, baseBytes, ...rest } = acc;
+			return {
+				...rest,
+				baseBytes: baseBytes + d.baseBytes,
+				bytes: bytes + d.bytes,
+			};
+		},
+		{
+			baseBytes: 0,
+			bytes: 0,
+			metafile: "(Total)",
+			outfile: "-",
+			remark: "added",
+			tree: undefined,
+		},
+	);
+	totalRow.remark =
+		totalRow.bytes > totalRow.baseBytes ? "increased" : "decreased";
+	const totalRows: Array<CompareResult> = showTotalChanges ? [totalRow] : [];
+
+	const individualRows = data.filter((d) => shouldShowBundle(d, showNoChange));
+	const rows = [...totalRows, ...individualRows]
 		.map((d) => {
 			return `${d.metafile} | ${d.outfile} | ${renderSize(d)} | ${renderNote(
 				d,

src/index.ts

@@ -24,6 +24,9 @@ function getInput(): Input {
 		showNoChange: ["true", "True", "TRUE"].includes(
 			getSingleInput("show_no_change") || "true",
 		),
+		showTotalChanges: ["true", "True", "TRUE"].includes(
+			getSingleInput("show_total_changes") || "false",
+		),
 		topNLargestPaths: Number.parseInt(
 			getSingleInput("top_n_largest_paths") || "20",
 			10,

src/types.ts

@@ -23,6 +23,7 @@ export interface Input {
 	percentExtraAttention: number;
 	showDetails: boolean;
 	showNoChange: boolean;
+	showTotalChanges: boolean;
 }
 
 export interface TreeMapNode {