From 879c383cfeb56c5e57e960d5260e19d117a3e65a Mon Sep 17 00:00:00 2001
From: Scott Worley <scottworley@scottworley.com>
Date: Wed, 1 Jul 2020 12:44:08 -0700
Subject: [PATCH 1/1] Show what nix-daemon is currently building

---
 README.md                 |  1 +
 default.nix               |  7 +++++++
 nix_currently_building.py | 28 ++++++++++++++++++++++++++++
 setup.py                  | 11 +++++++++++
 4 files changed, 47 insertions(+)
 create mode 100644 README.md
 create mode 100644 default.nix
 create mode 100755 nix_currently_building.py
 create mode 100644 setup.py

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..9c1ce17
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+A crummy workaround for https://github.com/NixOS/nix/issues/3200
diff --git a/default.nix b/default.nix
new file mode 100644
index 0000000..4972f1e
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,7 @@
+{ pkgs ? import <nixpkgs> { } }:
+pkgs.python3Packages.callPackage ({ lib, buildPythonPackage, }:
+  buildPythonPackage rec {
+    pname = "nix-currently-building";
+    version = "1.0.0";
+    src = lib.cleanSource ./.;
+  }) { }
diff --git a/nix_currently_building.py b/nix_currently_building.py
new file mode 100755
index 0000000..1b507c8
--- /dev/null
+++ b/nix_currently_building.py
@@ -0,0 +1,28 @@
+import os
+import subprocess
+import time
+
+
+BLOCK_SIZE = 4096
+MIN_AGE = time.time() - 86400 * 7
+
+
+def removesuffix(s, suf):  # Until python 3.9
+    return s[:len(s) - len(suf)] if s.endswith(suf) else s
+
+
+def truncated(log):
+    return subprocess.run(['bunzip2', '--test', log], stderr=subprocess.DEVNULL).returncode == 2
+
+
+def main():
+    for d, _, files in os.walk(os.environ.get('NIX_LOG_DIR', '/nix/var/log/nix')):
+        for f in files:
+            path = os.path.join(d, f)
+            st = os.stat(path)
+            if (st.st_size % BLOCK_SIZE) == 0 and st.st_mtime > MIN_AGE and truncated(path):
+                print(d[-2:] + removesuffix(f, '.bz2'))
+
+
+if __name__ == '__main__':
+    main()
diff --git a/setup.py b/setup.py
new file mode 100644
index 0000000..bee174c
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,11 @@
+from setuptools import setup
+
+setup(
+    name='nix_currently_building',
+    py_modules=['nix_currently_building'],
+    entry_points={
+        'console_scripts': [
+            'nix-currently-building = nix_currently_building:main',
+        ],
+    }
+)
-- 
2.44.1