Download the latest otelcol.

Author: jimf5

.github/workflows/ubuntu.yml

@@ -2,8 +2,6 @@ name: Ubuntu build
 
 on:
   push:
-    branches:
-    - main
   pull_request:
 
 jobs:
@@ -35,10 +33,13 @@ jobs:
                 -DNGX_OTEL_DEV=ON ..
           make -j $(nproc)
       - name: Download otelcol
+        env:
+          URL: "https://github.com/open-telemetry/\
+            opentelemetry-collector-releases/releases/latest/"
         run: |
-          curl -sLo - https://github.com/\
-          open-telemetry/opentelemetry-collector-releases/releases/download/\
-          v0.115.1/otelcol_0.115.1_linux_amd64.tar.gz | tar -xzv
+          curl -sLo - ${URL}download/otelcol_\
+          $(curl -sLo - ${URL} | grep -oP -m 1 "v\d+\.\d+\.\d+" | cut -c2-)\
+          _linux_amd64.tar.gz | tar -xzv
       - name: Install test dependencies
         run: pip install -r tests/requirements.txt
       - name: Run tests