ci: add check for ebpf lib out of sync

Signed-off-by: Mattia Meleleo <[email protected]>

Author: mmat11

.github/workflows/pull_request.yml

@@ -27,24 +27,11 @@ jobs:
           go-version-file: "go.mod"
           cache: "false"
       - name: Run verification and unit tests
-        run: make docker-generate verify cov-exclude-generated check-go-mod
+        run: make docker-generate verify cov-exclude-generated check-go-mod notices-update check-ebpf-ver-synced check-clean-work-tree
       - name: Report coverage
         uses: codecov/codecov-action@5a1091511ad55cbe89839c7260b706298ca349f7 # v5.5.1
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
         with:
           files: ./testoutput/cover.txt
           flags: unittests
-  verify-notices:
-    runs-on: ubuntu-24.04
-    steps:
-      - name: Checkout Repo
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-        with:
-          persist-credentials: false
-      - name: Setup Go
-        uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
-        with:
-          go-version-file: "go.mod"
-          cache: "false"
-      - run: make notices-update check-clean-work-tree

Makefile

@@ -39,7 +39,8 @@ CFLAGS := -O2 -g -Wunaligned-access -Wpacked -Wpadded -Wall -Werror $(CFLAGS)
 
 CLANG_TIDY ?= clang-tidy
 
-CILIUM_EBPF_VER ?= $(call gomod-version,cilium/ebpf)
+CILIUM_EBPF_VER ?= v0.20.0
+CILIUM_EBPF_PKG := github.com/cilium/ebpf
 
 # regular expressions for excluded file patterns
 EXCLUDE_COVERAGE_FILES="(_bpfel.go)|(/opentelemetry-ebpf-instrumentation/internal/test/)|(/opentelemetry-ebpf-instrumentation/configs/)|(.pb.go)|(/pkg/export/otel/metric/)|(/cmd/obi-genfiles)"
@@ -472,3 +473,13 @@ COMMIT ?= "HEAD"
 add-tags: verify-mods
 	@[ "${MODSET}" ] || ( echo ">> env var MODSET is not set"; exit 1 )
 	$(MULTIMOD) tag -m ${MODSET} -c ${COMMIT}
+
+.PHONY: check-ebpf-ver-synced
+check-ebpf-ver-synced:
+	@if grep -Fq "$(CILIUM_EBPF_PKG) $(CILIUM_EBPF_VER)" go.mod && \
+	   grep -Fq "$(CILIUM_EBPF_PKG) $(CILIUM_EBPF_VER)" bpf/bpfcore/placeholder.go; then \
+		echo "ebpf lib version in sync"; \
+	else \
+		echo "ebpf lib version out of sync between go.mod and bpf/bpfcore/placeholder.go!"; \
+		exit 1; \
+	fi