Fix issue with similarly named packages matching the wrong package in the generated changelog.

src/changelog.spec.ts

@@ -54,6 +54,31 @@ describe("Changelog", () => {
     }
   });
 
+  describe("packageFromPath with similarly named packages", () => {
+    const MockedChangelog = require("./changelog").default;
+
+    const TESTS = [
+      ["", ""],
+      ["/ember-fastboot/package.json", "ember-fastboot"],
+      ["/ember-fastboot-2-fast-2-furious/package.json", "ember-fastboot-2-fast-2-furious"],
+      ["/ember-fastboot-tokyo-drift/package.json", "ember-fastboot-tokyo-drift"],
+    ];
+
+    for (let [input, expected] of TESTS) {
+      it(`${input} -> ${expected}`, () => {
+        const changelog = new MockedChangelog({
+          rootPath: "/",
+          packages: [
+            { name: "ember-fastboot", path: "/ember-fastboot" },
+            { name: "ember-fastboot-2-fast-2-furious", path: "/ember-fastboot-2-fast-2-furious" },
+            { name: "ember-fastboot-tokyo-drift", path: "/ember-fastboot-tokyo-drift" },
+          ],
+        });
+        expect(changelog.packageFromPath(input)).toEqual(expected);
+      });
+    }
+  });
+
   describe("getCommitInfos", () => {
     beforeEach(() => {
       require("./fetch").__resetMockResponses();

src/changelog.ts

@@ -1,5 +1,5 @@
 const pMap = require("p-map");
-const { resolve } = require("path");
+const { resolve, sep } = require("path");
 
 import progressBar from "./progress-bar";
 import { Configuration } from "./configuration";
@@ -73,7 +73,9 @@ export default class Changelog {
   }
 
   private async getListOfUniquePackages(sha: string): Promise<string[]> {
-    return (await Git.changedPaths(sha))
+    let changedPaths = await Git.changedPaths(sha);
+
+    return changedPaths
       .map(path => this.packageFromPath(path))
       .filter(Boolean)
       .filter(onlyUnique);
@@ -84,7 +86,14 @@ export default class Changelog {
       // use the discovered packages
       const absolutePath = resolve(this.config.rootPath, path);
 
-      const foundPackage = this.config.packages.find(p => absolutePath.startsWith(p.path));
+      // Sometimes multiple packages may exist with the same prefix:
+      // ember-fastboot
+      // ember-fastboot-2-fast-2-furious
+      const foundPackage = this.config.packages.find(p => {
+        let withSlash = p.path.endsWith(sep) ? p.path : `${p.path}${sep}`;
+
+        return absolutePath.startsWith(withSlash);
+      });
 
       if (foundPackage) {
         return foundPackage.name;