T973: add build script for frr_exporter package

.github/workflows/trigger_rebuild_packages.yml

@@ -33,6 +33,8 @@ jobs:
               - 'scripts/package-build/ethtool/**'
             frr:
               - 'scripts/package-build/frr/**'
+            frr_exporter:
+              - 'scripts/package-build/frr_exporter/**'
             hostap:
               - 'scripts/package-build/hostap/**'
             hsflowd:
@@ -117,6 +119,10 @@ jobs:
             trigger_build "frr"
           fi
 
+          if [ "${{ steps.changes.outputs.frr_exporter }}" == "true" ]; then
+            trigger_build "frr_exporter"
+          fi
+
           if [ "${{ steps.changes.outputs.hostap }}" == "true" ]; then
             trigger_build "hostap"
           fi

scripts/package-build/frr_exporter/.gitignore

@@ -0,0 +1,6 @@
+frr_exporter    /
+*.buildinfo
+*.build
+*.changes
+*.deb
+*.dsc

scripts/package-build/frr_exporter/build.py

@@ -0,0 +1 @@
+../build.py

scripts/package-build/frr_exporter/package.toml

@@ -0,0 +1,22 @@
+[[packages]]
+name = "frr_exporter"
+commit_id = "v1.3.1"
+scm_url = "https://github.com/tynany/frr_exporter"
+
+build_cmd = """
+
+# Create the install directory
+mkdir -p debian/usr/sbin
+make setup_promu
+go build
+
+# Move the frr_exporter binary to the install directory
+mv frr_exporter debian/usr/sbin
+
+# Build the Debian package
+fpm --input-type dir --output-type deb --name frr-exporter \
+    --version $(git describe --tags --always | cut -c2-) --deb-compression gz \
+    --maintainer "VyOS Package Maintainers <maintainers@vyos.net>" \
+    --description "Prometheus exporter for FRR" \
+    --license Apache-2.0 -C debian --package ..
+"""