fix: account for multiple existing equivalent labels (#768)

## PR Checklist

- [x] Addresses an existing open issue: fixes #767
- [x] That issue was marked as [`status: accepting
prs`](https://github.com/JoshuaKGoldberg/create-typescript-app/issues?q=is%3Aopen+is%3Aissue+label%3A%22status%3A+accepting+prs%22)
- [x] Steps in
[CONTRIBUTING.md](https://github.com/JoshuaKGoldberg/create-typescript-app/blob/main/.github/CONTRIBUTING.md)
were taken

## Overview

Changes `getExistingEquivalentLabel` (singular) to
`getExistingEquivalentLabels` (plural).

Author: JoshuaKGoldberg

src/steps/initializeGitHubRepository/labels/getExistingEquivalentLabel.test.ts

@@ -0,0 +1,76 @@
+import { describe, expect, it } from "vitest";
+
+import { getExistingEquivalentLabels } from "./getExistingEquivalentLabels.js";
+
+const createLabel = (name: string) => ({
+	color: "#000000",
+	description: "A good label.",
+	name,
+});
+
+describe("getExistingEquivalentLabels", () => {
+	it("returns no labels when there are no existing labels", () => {
+		const actual = getExistingEquivalentLabels([], "abc");
+
+		expect(actual).toEqual([]);
+	});
+
+	it("returns no labels when no existing label matches", () => {
+		const actual = getExistingEquivalentLabels([createLabel("abc")], "def");
+
+		expect(actual).toEqual([]);
+	});
+
+	it("returns an existing un-prefixed label when it matches by name", () => {
+		const abcLabel = createLabel("abc");
+		const actual = getExistingEquivalentLabels(
+			[createLabel("def"), abcLabel, createLabel("ghi")],
+			"abc",
+		);
+
+		expect(actual).toEqual([abcLabel]);
+	});
+
+	it("returns an existing prefixed label when it matches by name", () => {
+		const abcDefLabel = createLabel("abc: def");
+		const actual = getExistingEquivalentLabels([abcDefLabel], "abc: def");
+
+		expect(actual).toEqual([abcDefLabel]);
+	});
+
+	it("returns the existing label when it matches excluding prefix", () => {
+		const abcLabel = createLabel("abc");
+		const actual = getExistingEquivalentLabels(
+			[createLabel("abc: def"), abcLabel, createLabel("ghi")],
+			"type: abc",
+		);
+
+		expect(actual).toEqual([abcLabel]);
+	});
+
+	it("returns the existing label when it matches an alias", () => {
+		const enhancementLabel = createLabel("enhancement");
+		const actual = getExistingEquivalentLabels(
+			[createLabel("abc: def"), enhancementLabel, createLabel("ghi")],
+			"type: feature",
+		);
+
+		expect(actual).toEqual([enhancementLabel]);
+	});
+
+	it("returns both existing labels when one matches on name and another matches an alias", () => {
+		const enhancementLabel = createLabel("enhancement");
+		const typeFeatureLabel = createLabel("type: feature");
+		const actual = getExistingEquivalentLabels(
+			[
+				createLabel("abc: def"),
+				enhancementLabel,
+				createLabel("ghi"),
+				typeFeatureLabel,
+			],
+			"type: feature",
+		);
+
+		expect(actual).toEqual([enhancementLabel, typeFeatureLabel]);
+	});
+});

src/steps/initializeGitHubRepository/labels/getExistingEquivalentLabel.ts

@@ -0,0 +1,26 @@
+const aliases = new Map([
+	["enhancement", "type: feature"],
+	["help wanted", "status: accepting prs"],
+]);
+
+export interface GhLabelData {
+	color: string;
+	description: string;
+	name: string;
+}
+
+export function getExistingEquivalentLabels(
+	existingLabels: GhLabelData[],
+	outcomeLabelName: string,
+) {
+	const outcomeTrimmed = outcomeLabelName.replace(/\w+: (\w+)/, "$1");
+
+	return existingLabels.filter(({ name: existingName }) => {
+		return (
+			existingName === outcomeLabelName ||
+			existingName === outcomeTrimmed ||
+			aliases.get(existingName) === outcomeLabelName ||
+			existingName.replace(/\w+: (\w+)/, "$1") === outcomeLabelName
+		);
+	});
+}

src/steps/initializeGitHubRepository/labels/getExistingEquivalentLabels.test.ts

@@ -13,7 +13,7 @@ vi.mock("execa", () => ({
 const mockOutcomeLabel = {
 	color: "000000",
 	description: "def ghi",
-	name: "abc",
+	name: "area: abc",
 };
 
 vi.mock("./outcomeLabels.js", () => ({
@@ -23,7 +23,7 @@ vi.mock("./outcomeLabels.js", () => ({
 }));
 
 describe("migrateRepositoryLabels", () => {
-	it("creates a outcome label when labels stdout is returned", async () => {
+	it("creates an outcome label when labels stdout is empty", async () => {
 		mock$.mockResolvedValue({
 			stdout: "",
 		});
@@ -44,15 +44,15 @@ describe("migrateRepositoryLabels", () => {
 			      " --description ",
 			      "",
 			    ],
-			    "abc",
+			    "area: abc",
 			    "000000",
 			    "def ghi",
 			  ],
 			]
 		`);
 	});
 
-	it("creates a outcome label when it doesn't already exist", async () => {
+	it("creates an outcome label when it doesn't already exist", async () => {
 		mock$.mockResolvedValue({
 			stdout: JSON.stringify([
 				{
@@ -79,7 +79,7 @@ describe("migrateRepositoryLabels", () => {
 			      " --description ",
 			      "",
 			    ],
-			    "abc",
+			    "area: abc",
 			    "000000",
 			    "def ghi",
 			  ],
@@ -105,7 +105,7 @@ describe("migrateRepositoryLabels", () => {
 		`);
 	});
 
-	it("edits a outcome label when it already exists with different color", async () => {
+	it("edits the outcome label when it already exists with different color", async () => {
 		mock$.mockResolvedValue({
 			stdout: JSON.stringify([
 				{
@@ -130,18 +130,18 @@ describe("migrateRepositoryLabels", () => {
 			      " --color ",
 			      " --description ",
 			      " --name ",
-			      "",
+			      " --yes",
 			    ],
-			    "abc",
+			    "area: abc",
 			    "000000",
 			    "def ghi",
-			    "abc",
+			    "area: abc",
 			  ],
 			]
 		`);
 	});
 
-	it("edits a outcome label when it already exists with different description", async () => {
+	it("edits the outcome label when it already exists with a different description", async () => {
 		mock$.mockResolvedValue({
 			stdout: JSON.stringify([
 				{
@@ -166,12 +166,12 @@ describe("migrateRepositoryLabels", () => {
 			      " --color ",
 			      " --description ",
 			      " --name ",
-			      "",
+			      " --yes",
 			    ],
-			    "abc",
+			    "area: abc",
 			    "000000",
 			    "def ghi",
-			    "abc",
+			    "area: abc",
 			  ],
 			]
 		`);
@@ -183,7 +183,7 @@ describe("migrateRepositoryLabels", () => {
 				{
 					color: "000000",
 					description: "def ghi",
-					name: "abc",
+					name: "area: abc",
 				},
 				{
 					color: "000000",
@@ -233,9 +233,94 @@ describe("migrateRepositoryLabels", () => {
 			      " --description ",
 			      "",
 			    ],
+			    "area: abc",
+			    "000000",
+			    "def ghi",
+			  ],
+			]
+		`);
+	});
+
+	it("deletes the existing duplicate outcome label and edits the label with the outcome name and different color when both exist", async () => {
+		mock$.mockResolvedValue({
+			stdout: JSON.stringify([
+				{
+					color: "000000",
+					description: "def ghi",
+					name: "abc",
+				},
+				{
+					color: "111111",
+					description: "def ghi",
+					name: "area: abc",
+				},
+			]),
+		});
+
+		await initializeRepositoryLabels();
+
+		expect(mock$.mock.calls).toMatchInlineSnapshot(`
+			[
+			  [
+			    [
+			      "gh label list --json color,description,name",
+			    ],
+			  ],
+			  [
+			    [
+			      "gh label delete ",
+			      " --yes",
+			    ],
 			    "abc",
+			  ],
+			  [
+			    [
+			      "gh label edit ",
+			      " --color ",
+			      " --description ",
+			      " --name ",
+			      " --yes",
+			    ],
+			    "area: abc",
 			    "000000",
 			    "def ghi",
+			    "area: abc",
+			  ],
+			]
+		`);
+	});
+
+	it("deletes the existing duplicate outcome label and does not edit the label with the outcome name and same information when both exist", async () => {
+		mock$.mockResolvedValue({
+			stdout: JSON.stringify([
+				{
+					color: "000000",
+					description: "def ghi",
+					name: "abc",
+				},
+				{
+					color: "000000",
+					description: "def ghi",
+					name: "area: abc",
+				},
+			]),
+		});
+
+		await initializeRepositoryLabels();
+
+		expect(mock$.mock.calls).toMatchInlineSnapshot(`
+			[
+			  [
+			    [
+			      "gh label list --json color,description,name",
+			    ],
+			  ],
+			  [
+			    [
+			      "gh label delete ",
+			      " --yes",
+			    ],
+			    "abc",
 			  ],
 			]
 		`);
@@ -268,7 +353,7 @@ describe("migrateRepositoryLabels", () => {
 			      " --description ",
 			      "",
 			    ],
-			    "abc",
+			    "area: abc",
 			    "000000",
 			    "def ghi",
 			  ],