From 98d63e0a85506175e219b93478a814f8588c52d3 Mon Sep 17 00:00:00 2001
From: Alexander Chaschin <achasch@gmail.com>
Date: Tue, 20 Sep 2022 11:47:56 +0300
Subject: [PATCH] Add a new line at the end of the default config file
 generated when invoking `changeset init` (#953)
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* test: add newline at the end case

* feat: add newline at the end of the config file

* chore: add changeset

* Update .changeset/hungry-spiders-check.md

* Update .changeset/hungry-spiders-check.md

Co-authored-by: Mateusz Burzyński <mateuszburzynski@gmail.com>
---
 .changeset/hungry-spiders-check.md                  |  5 +++++
 packages/cli/src/commands/init/__tests__/command.ts | 12 ++++++++++++
 packages/cli/src/commands/init/index.ts             |  4 ++--
 3 files changed, 19 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/hungry-spiders-check.md

diff --git a/.changeset/hungry-spiders-check.md b/.changeset/hungry-spiders-check.md
new file mode 100644
index 000000000..d39a7e95a
--- /dev/null
+++ b/.changeset/hungry-spiders-check.md
@@ -0,0 +1,5 @@
+---
+"@changesets/cli": patch
+---
+
+Add a new line at the end of the default config file generated when invoking `changeset init`.
diff --git a/packages/cli/src/commands/init/__tests__/command.ts b/packages/cli/src/commands/init/__tests__/command.ts
index 65f460255..57dca15e5 100644
--- a/packages/cli/src/commands/init/__tests__/command.ts
+++ b/packages/cli/src/commands/init/__tests__/command.ts
@@ -37,6 +37,18 @@ describe("init", () => {
       { ...defaultWrittenConfig, baseBranch: "main" }
     );
   });
+  it("should add newline at the end of config", async () => {
+    const cwd = await f.copy("simple-project");
+    await fs.remove(path.join(cwd, ".changeset/config.json"));
+
+    await initializeCommand(cwd);
+
+    const configPath = path.join(cwd, ".changeset/config.json");
+    const config = (await fs.promises.readFile(configPath)).toString();
+    const lastCharacter = config.slice(-1);
+
+    expect(lastCharacter).toBe("\n");
+  });
   it("shouldn't overwrite a config if it does exist", async () => {
     const cwd = await f.copy("simple-project");
     await fs.writeJson(path.join(cwd, ".changeset/config.json"), {
diff --git a/packages/cli/src/commands/init/index.ts b/packages/cli/src/commands/init/index.ts
index 5e5757fc3..b29e61134 100644
--- a/packages/cli/src/commands/init/index.ts
+++ b/packages/cli/src/commands/init/index.ts
@@ -9,11 +9,11 @@ const pkgPath = path.dirname(require.resolve("@changesets/cli/package.json"));
 
 // Modify base branch to "main" without changing defaultWrittenConfig since it also serves as a fallback
 // for config files that don't specify a base branch. Changing that to main would be a breaking change.
-const defaultConfig = JSON.stringify(
+const defaultConfig = `${JSON.stringify(
   { ...defaultWrittenConfig, baseBranch: "main" },
   null,
   2
-);
+)}\n`;
 
 export default async function init(cwd: string) {
   const changesetBase = path.resolve(cwd, ".changeset");