From 49425ab994fe49e6932fb513c9204c6dc2b1537d Mon Sep 17 00:00:00 2001
From: Keiichiro Ui <keiichiro.ui@gmail.com>
Date: Fri, 8 Dec 2023 22:54:09 +0900
Subject: [PATCH] Lint changelog

---
 Makefile                    |  1 +
 scripts/lint_changelog.bash | 31 +++++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100755 scripts/lint_changelog.bash

diff --git a/Makefile b/Makefile
index 8595b86..31fee5e 100644
--- a/Makefile
+++ b/Makefile
@@ -58,6 +58,7 @@ lint: node_modules
 	npx prettier . --check
 	npx tsc --project src --noEmit
 	hadolint Dockerfile
+	./scripts/lint_changelog.bash
 
 .PHONY: fix
 fix: node_modules
diff --git a/scripts/lint_changelog.bash b/scripts/lint_changelog.bash
new file mode 100755
index 0000000..d03ed44
--- /dev/null
+++ b/scripts/lint_changelog.bash
@@ -0,0 +1,31 @@
+#!/bin/bash
+
+set -euo pipefail
+
+cd "$(dirname "$0")/.."
+
+main() {
+  has_current_version_chengelog
+  for file in changelog/*.md; do
+    should_start_with_version_header "$file"
+  done
+}
+
+has_current_version_chengelog() {
+  local v="$(node -e 'console.log(require("./package.json").version)')"
+  if ! [[ -f "changelog/$v.md" ]]; then
+    echo "changelog/$v.md does not exist"
+    exit 1
+  fi
+}
+
+should_start_with_version_header() {
+  local file="$1"
+  local v=$(basename "$file" .md)
+  if head -n1 "$file" | grep -vq "^# Version $v$"; then
+    echo "changelog/$v.md does not start with the correct version header"
+    exit 1
+  fi
+}
+
+main