Embed build information into server binaries.

Jenkinsfile

@@ -10,6 +10,11 @@ pipeline {
         stage('Build') {
             steps {
                 sh 'Tools/package_release_build.py -p windows mac linux'
+            }
+        }
+        stage('Update build info') {
+            steps {
+                sh 'Tools/gen_build_info.py'
                 archiveArtifacts artifacts: 'release/*.zip'
             }
         }

Tools/gen_build_info.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python3
+
+# Generates build info and injects it into the server zip files.
+
+import hashlib
+import json
+import os
+from zipfile import ZipFile, ZIP_DEFLATED
+
+FILES = {
+    "linux": "SS14.Client_Linux_x64.zip",
+    "windows": "SS14.Client_Windows_x64.zip",
+    "macos": "SS14.Client_macOS_x64.zip"
+}
+
+SERVER_FILES = [
+    "SS14.Server_Linux_x64.zip",
+    "SS14.Server_Windows_x64.zip",
+    "SS14.Server_macOS_x64.zip"
+]
+
+FORK_ID = "wizards"
+
+
+def main() -> None:
+    manifest = generate_manifest("release")
+
+    for server in SERVER_FILES:
+        inject_manifest(os.path.join("release", server), manifest)
+
+
+def inject_manifest(zip_path: str, manifest: str) -> None:
+    with ZipFile(zip_path, "a", compression=ZIP_DEFLATED) as z:
+        z.writestr("build.json", manifest)
+
+
+def generate_manifest(dir: str) -> str:
+    # Env variables set by Jenkins.
+
+    jenkins_base = f"{os.environ['BUILD_URL']}artifact/release/"
+
+    version = os.environ["BUILD_NUMBER"]
+    downloads = {}
+    hashes = {}
+
+    for platform, filename in FILES.items():
+        downloads[platform] = f"{jenkins_base}{filename}"
+        hashes[platform] = sha256_file(os.path.join(dir, filename))
+
+    return json.dumps({"downloads": downloads, "hashes": hashes, "version": version, "fork_id": FORK_ID})
+
+
+def sha256_file(path: str) -> str:
+    with open(path, "rb") as f:
+        h = hashlib.sha256()
+        for b in iter(lambda: f.read(4096), b""):
+            h.update(b)
+
+        return h.hexdigest()
+
+
+if __name__ == '__main__':
+    main()