Add Go code generated for api_v2 (#116)

## Which problem is this PR solving?
- Part 1 and 2 of jaegertracing/jaeger#6494
for api_v2

## Description of the changes
- Create makefile for compiling and generating code from .proto files
present
- All locations of proto files, as well as generated code are inspired
from main jaeger repo. (Since no other alteranative was suggested in
issue.)
- Add all the generated code from the proto files as well.
- Create ci-lint file for same.

## How was this change tested?
- CI

## Checklist
- [x] I have read
https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
- [x] I have signed all commits
- [ ] I have added unit tests for the new functionality
- [ ] I have run lint and test steps successfully
  - for `jaeger`: `make lint test`
  - for `jaeger-ui`: `npm run lint` and `npm run test`

---------

Signed-off-by: adityachopra29 <[email protected]>

.github/workflows/ci-lint-test.yml

@@ -0,0 +1,35 @@
+name: Lint Checks
+
+on:
+  push:
+    branches: [main]
+
+  pull_request:
+    branches: [main]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ (github.event.pull_request && github.event.pull_request.number) || github.ref || github.run_id }}
+  cancel-in-progress: true
+
+# See https://github.com/ossf/scorecard/blob/main/docs/checks.md#token-permissions
+permissions:  # added using https://github.com/step-security/secure-workflows
+  contents: read
+
+jobs:
+  generated-files-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit # TODO: change to 'egress-policy: block' after a couple of runs
+
+      - uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
+        with:
+          submodules: recursive
+
+      - uses: actions/setup-go@3041bf56c941b39c61721a86cd11f3bb1338122a # v5.2.0
+        with:
+          go-version: 1.23.x
+
+      - name: Verify Protobuf types are up to date
+        run: make new-proto && git diff --name-status --exit-code

Makefile

@@ -108,6 +108,21 @@ PROTOC_INTERNAL := $(PROTOC) \
 		--csharp_out=internal_access,base_namespace:${PROTO_GEN_CSHARP_DIR} \
 		--python_out=${PROTO_GEN_PYTHON_DIR}
 
+GO=go
+GOOS ?= $(shell $(GO) env GOOS)
+GOARCH ?= $(shell $(GO) env GOARCH)
+
+# sed on Mac does not support the same syntax for in-place updates as sed on Linux
+# When running on MacOS it's best to install gsed and run Makefile with SED=gsed
+ifeq ($(GOOS),darwin)
+	SED=gsed
+else
+	SED=sed
+endif
+
+# import other Makefiles after the variables are defined
+include Makefile.Protobuf.mk
+
 .PHONY: proto
 proto: proto-prepare proto-api-v2 proto-api-v3
 

Makefile.Protobuf.mk

@@ -0,0 +1,70 @@
+# Copyright (c) 2023 The Jaeger Authors.
+# SPDX-License-Identifier: Apache-2.0
+
+# Generate gogo, swagger, go-validators, gRPC-storage-plugin output.
+#
+# -I declares import folders, in order of importance. This is how proto resolves the protofile imports.
+# It will check for the protofile relative to each of thesefolders and use the first one it finds.
+#
+# --gogo_out generates GoGo Protobuf output with gRPC plugin enabled.
+# --govalidators_out generates Go validation files for our messages types, if specified.
+#
+# The lines starting with Mgoogle/... are proto import replacements,
+# which cause the generated file to import the specified packages
+# instead of the go_package's declared by the imported protof files.
+#
+
+DOCKER_PROTOBUF_VERSION=0.5.0
+DOCKER_PROTOBUF=jaegertracing/protobuf:$(DOCKER_PROTOBUF_VERSION)
+# PROTOC := ${DOCKER} run --rm -u ${shell id -u} -v${PWD}:${PWD} -w${PWD} ${DOCKER_PROTOBUF} --proto_path=${PWD}
+
+PATCHED_OTEL_PROTO_DIR = proto-gen/.patched-otel-proto
+
+# The source directory for OTLP Protobufs from the sub-sub-module.
+OTEL_PROTO_SRC_DIR=opentelemetry-proto/opentelemetry/proto
+
+# Find all OTEL .proto files, remove leading path (only keep relevant namespace dirs).
+OTEL_PROTO_FILES=$(subst $(OTEL_PROTO_SRC_DIR)/,,\
+   $(shell ls $(OTEL_PROTO_SRC_DIR)/{common,resource,trace}/v1/*.proto))
+
+# Macro to execute a command passed as argument.
+# DO NOT DELETE EMPTY LINE at the end of the macro, it's required to separate commands.
+define exec-command
+$(1)
+
+endef
+
+# DO NOT DELETE EMPTY LINE at the end of the macro, it's required to separate commands.
+define print_caption
+  @echo "🏗️ "
+  @echo "🏗️ " $1
+  @echo "🏗️ "
+
+endef
+
+# Macro to compile Protobuf $(2) into directory $(1). $(3) can provide additional flags.
+# DO NOT DELETE EMPTY LINE at the end of the macro, it's required to separate commands.
+# Arguments:
+#  $(1) - output directory
+#  $(2) - path to the .proto file
+#  $(3) - additional flags to pass to protoc, e.g. extra -Ixxx
+#  $(4) - additional options to pass to gogo plugin
+define proto_compile
+  $(call print_caption, "Processing $(2) --> $(1)")
+
+  $(PROTOC) \
+    $(PROTO_INCLUDES) \
+    --gogo_out=plugins=grpc,$(strip $(4)),$(PROTO_GOGO_MAPPINGS):$(PWD)/$(strip $(1)) \
+    $(3) $(2)
+
+endef
+
+.PHONY: new-proto
+new-proto: new-proto-api-v2
+
+.PHONY: new-proto-api-v2
+new-proto-api-v2:
+	mkdir -p proto-gen/api_v2
+	$(call proto_compile, proto-gen/api_v2, proto/api_v2/query.proto)
+	$(call proto_compile, proto-gen/api_v2, proto/api_v2/collector.proto)
+	$(call proto_compile, proto-gen/api_v2, proto/api_v2/sampling.proto)