FROM ubuntu:lunar-20230615 and `lap` install fixes (#3374)

docker/Dockerfile-cpu

@@ -3,7 +3,7 @@
 # Image is CPU-optimized for ONNX, OpenVINO and PyTorch YOLOv8 deployments
 
 # Start FROM Ubuntu image https://hub.docker.com/_/ubuntu
-FROM ubuntu:22.10
+FROM ubuntu:lunar-20230615
 
 # Downloads to user config dir
 ADD https://ultralytics.com/assets/Arial.ttf https://ultralytics.com/assets/Arial.Unicode.ttf /root/.config/Ultralytics/
@@ -23,6 +23,9 @@ WORKDIR /usr/src/ultralytics
 RUN git clone https://github.com/ultralytics/ultralytics /usr/src/ultralytics
 ADD https://github.com/ultralytics/assets/releases/download/v0.0.0/yolov8n.pt /usr/src/ultralytics/
 
+# Remove python3.11/EXTERNALLY-MANAGED or use 'pip install --break-system-packages' avoid 'externally-managed-environment' Ubuntu nightly error
+RUN rm -rf /usr/lib/python3.11/EXTERNALLY-MANAGED
+
 # Install pip packages
 RUN python3 -m pip install --upgrade pip wheel
 RUN pip install --no-cache -e . thop --extra-index-url https://download.pytorch.org/whl/cpu

ultralytics/tracker/utils/matching.py

@@ -13,7 +13,8 @@ try:
 except (ImportError, AssertionError, AttributeError):
     from ultralytics.yolo.utils.checks import check_requirements
 
-    check_requirements('lap>=0.4')  # install
+    check_requirements('cython')  # required before installing lap from source
+    check_requirements('git+https://github.com/gatagat/lap.git')  # more reliable than 'pip install lap'
     import lap
 
 

ultralytics/yolo/utils/checks.py

@@ -222,12 +222,13 @@ def check_requirements(requirements=ROOT.parent / 'requirements.txt', exclude=()
     s = ''  # console string
     n = 0  # number of packages updates
     for r in requirements:
+        rmin = r.split('/')[-1].replace('.git', '')  # replace git+https://org/repo.git -> 'repo'
         try:
-            pkg.require(r)
+            pkg.require(rmin)
         except (pkg.VersionConflict, pkg.DistributionNotFound):  # exception if requirements not met
             try:  # attempt to import (slower but more accurate)
                 import importlib
-                importlib.import_module(next(pkg.parse_requirements(r)).name)
+                importlib.import_module(next(pkg.parse_requirements(rmin)).name)
             except ImportError:
                 s += f'"{r}" '
                 n += 1