From ec5e9970f26536c7a4bf6cd0dfe4992ad93c0121 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=EB=A3=A8=EB=B0=80LuMir?= <rpfos@naver.com>
Date: Fri, 3 Jan 2025 23:32:16 +0900
Subject: [PATCH] wip

---
 examples/git-clang-format/README.md    | 131 ++++++++++++++++++++++++-
 examples/git-clang-format/package.json |   2 +-
 2 files changed, 130 insertions(+), 3 deletions(-)

diff --git a/examples/git-clang-format/README.md b/examples/git-clang-format/README.md
index 7dd44f2..b985818 100644
--- a/examples/git-clang-format/README.md
+++ b/examples/git-clang-format/README.md
@@ -1,5 +1,132 @@
-# `git-clang-format` Example
+# `examples-git-clang-format`
 
-```bash
+This example demonstrates the features of `git-clang-format` command (same as `git clang-format` command).
+
+Follow the guidelines below to see how `git-clang-format` works.
+
+## Getting Started
+
+Take a look at the `src/main.c` file in the `examples/git-clang-format` directory.
+
+Note that this file is not formatted according to the coding style configured in the `.clang-format` file at the root.
+
+In this scenario, what would happen if I add a space to line 9 of the `src/main.c` file, run `git add src/main.c`, and then execute `npx git-clang-format` (same as running `git clang-format`)?
+
+```c
+/* src/main.c */
+
+#include <stdio.h>
+
+int main(void) {
+  printf("Line 4");
+  printf("Line 5");
+  printf("Line 6");
+      printf("Line 7");
+  printf("Line 8");
+            printf("Line 9");
+  printf("Line 10");
+
+  return 0;
+}
+```
+
+### Step 1
+
+Run the following command to add a space to line 9 of the `src/main.c` file.
+
+#### Run from the Root
+
+```sh
+npm run add-a-space-to-line-9-of-main-c-file -w examples/git-clang-format
+```
+
+#### Navigate to the Directory and Run
+
+```sh
+cd examples/git-clang-format
+
+npm run add-a-space-to-line-9-of-main-c-file
+```
+
+---
+
+Now, you can see that the `src/main.c` file has been modified as shown below.
+
+```diff
+-            printf("Line 9");
++             printf("Line 9");
+```
+
+### Step 2
+
+Run the following command to add the modified `src/main.c` file to the staging area of Git.
+
+#### Run from the Root
+
+```sh
+npm run git-add -w examples/git-clang-format
+```
+
+#### Navigate to the Directory and Run
+
+```sh
+# cd examples/git-clang-format (You are already in the directory.)
+
+npm run git-add
+```
+
+---
+
+Now, you can see that the `src/main.c` file has been added to the staging area of Git.
+
+```txt
+Changes to be committed:
+  (use "git restore --staged <file>..." to unstage)
+        modified:   src/main.c
+```
+
+### Step 3
+
+Run the following command to run `git-clang-format` and check the result.
+
+#### Run from the Root
+
+```sh
 npm run git-clang-format -w examples/git-clang-format
 ```
+
+#### Navigate to the Directory and Run
+
+```sh
+# cd examples/git-clang-format (You are already in the directory.)
+
+npm run git-clang-format
+```
+
+---
+
+If you run the command, it should produce an **error message** like the one below, since the modified `src/main.c` file is not formatted according to the coding style configured in the `.clang-format` file.
+
+```txt
+> examples-git-clang-format@1.2.3 git-clang-format
+> npx git-clang-format
+
+changed files:
+    examples/git-clang-format/src/main.c
+Process exited with code: 1
+```
+
+Check the 'Changes not staged for commit' section in Git using the `git status` command in the CLI and review the `src/main.c` file. The `git-clang-format` command should have fixed the code formatting according to the coding style configured in the `.clang-format` file.
+
+So, it is now properly formatted according to the configured coding style.
+
+```diff
+-             printf("Line 9");
++  printf("Line 9");
+```
+
+## Notable Points
+
+If you run the `npx clang-format src/main.c` command, it will format the entire `src/main.c` file according to the coding style configured in the `.clang-format` file.
+
+However, if you run the `npx clang-format src/main.c` command on a modified file, it will only format the changed lines of code. This is known as **Surgical Formatting**.
diff --git a/examples/git-clang-format/package.json b/examples/git-clang-format/package.json
index 8884eb8..04ec124 100644
--- a/examples/git-clang-format/package.json
+++ b/examples/git-clang-format/package.json
@@ -4,7 +4,7 @@
   "version": "1.2.3",
   "scripts": {
     "add-a-space-to-line-9-of-main-c-file": "cat src/main_overwrite.txt > src/main.c",
-    "git-add": "git add src/main.c",
+    "git-add": "git add src/main.c && git status",
     "git-clang-format": "npx git-clang-format"
   },
   "dependencies": {