add lock to prevent multiple workers from accessing repo db

master.py

@@ -11,7 +11,7 @@ import signal
 import subprocess
 import sys
 import time
-from multiprocessing import Pool, Queue, current_process
+from multiprocessing import Pool, Queue, current_process, Lock
 
 import yaml
 from packaging import version
@@ -22,6 +22,7 @@ regex_march = re.compile(r"(-march=)(.+?) ", re.MULTILINE)
 regex_validkeys = re.compile(r"^validpgpkeys\+?=\((.*?)\)", re.MULTILINE | re.DOTALL)
 fp = None
 update_last = time.time()
+repo_lock = Lock()
 
 
 def build(pkgbuild, repo):
@@ -81,6 +82,7 @@ def build(pkgbuild, repo):
         shutil.copy2(pkg, os.path.join(config["basedir"]["repo"], repo, "os", config["arch"] + "/"))
 
     # repo
+    repo_lock.acquire()
     r_res = subprocess.run(["repo-add", "-s", "-v",
                             os.path.join(config["basedir"]["repo"], repo, "os", config["arch"],
                                          repo + ".db.tar.xz"),
@@ -88,6 +90,7 @@ def build(pkgbuild, repo):
     logging.debug("[REPO-ADD] %s", r_res.stdout.decode())
     if r_res.returncode:
         logging.error("[%s/%s] Repo action failed: %s", repo, name, r_res.stdout.decode())
+        repo_lock.release()
         build_cleanup()
         return
 
@@ -95,6 +98,7 @@ def build(pkgbuild, repo):
         ["paccache", "-rc", os.path.join(config["basedir"]["repo"], repo, "os", config["arch"]), "-k", "1"],
         stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
     logging.debug("[PACCACHE] %s", p_res.stdout.decode())
+    repo_lock.release()
     if p_res.returncode:
         logging.error("[%s/%s] Repo cleanup failed: %s", repo, name, p_res.stdout.decode())
         build_cleanup()
@@ -102,7 +106,7 @@ def build(pkgbuild, repo):
 
     # cleanup
     build_cleanup()
-    logging.info("[%s/%s] Build successful (%s)", repo, name, int(time.time() - start_time))
+    logging.info("[%s/%s] Build successful (%ss)", repo, name, int(time.time() - start_time))
 
 
 def run_worker() -> None: