ci: fix auto relase description

appveyor.yml

@@ -6,9 +6,15 @@ build_script:
   - make build
 after_build:
   - 7z a -tzip -xr!.* -xr0!build build\\WuLiFang-Nuke-%APPVEYOR_REPO_TAG_NAME%-win.zip
+  - ps: |
+      ${env:APPVEYOR_RELEASE_DESCRIPTION} = ./scripts/get_changelog.ps1 -Version v2021.0.1
+      Write-Host ${env:APPVEYOR_RELEASE_DESCRIPTION}
 artifacts:
   - path: build\WuLiFang-Nuke-*.zip
     name: Built package
+before_deploy:
+  - ps: |
+      ${env:APPVEYOR_RELEASE_DESCRIPTION} = ./scripts/get_changelog.ps1 -Version $env:APPVEYOR_REPO_TAG_NAME
 deploy:
   tag: $(APPVEYOR_REPO_TAG_NAME)
   release: $(APPVEYOR_REPO_TAG_NAME)

scripts/get_changelog.ps1

@@ -0,0 +1,30 @@
+param (
+    [Parameter()]
+    [String]
+    $Version
+)
+
+$ret = @()
+$isMatch = $false
+foreach ($line in Get-Content -Encoding utf8 docs/changelog.md) {
+    if ($line -match "## \[(?<version>.+)]") {
+        if ($Matches.version -eq ($Version -replace "^v", "")) {
+            $isMatch = $true
+        }
+        elseif ($isMatch) {
+            break
+        }
+        continue
+    }
+
+    if ($isMatch) {
+        $ret += $line
+    }
+}
+
+if ($ret.Length -eq 0) {
+    throw "Version not found: $Version"
+}
+
+
+return $ret -join "`n"