Migrating Kuksa Go Client from kuksa.val

.github/workflows/kuksa_go_client.yaml

@@ -0,0 +1,53 @@
+# /********************************************************************************
+# * Copyright (c) 2022 Contributors to the Eclipse Foundation
+# *
+# * See the NOTICE file(s) distributed with this work for additional
+# * information regarding copyright ownership.
+# *
+# * This program and the accompanying materials are made available under the
+# * terms of the Apache License 2.0 which is available at
+# * http://www.apache.org/licenses/LICENSE-2.0
+# *
+# * SPDX-License-Identifier: Apache-2.0
+# ********************************************************************************/
+
+name: kuksa_go_client
+
+on:
+  push:
+  pull_request:
+    paths:
+    - ".github/workflows/kuksa_go_client.yaml"
+    - "kuksa_go_client/**"
+  workflow_dispatch:
+
+concurrency:
+      group: ${{ github.ref }}-${{ github.workflow }}
+      cancel-in-progress: true
+
+jobs:
+
+  kuksa-go-client-test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout kuksa-incubation
+        uses: actions/checkout@v4
+      - name: Run go tests
+        run: |
+          cd kuksa_go_client
+          # We cannot use sudo apt install protobuf-compiler
+          # as default in Ubuntu 22.04 (3.12) consider optional as experimental feature
+          go run protocInstall/protocInstall.go
+          export PATH=$PATH:$HOME/protoc/bin
+          sudo chmod +x $HOME/protoc/bin/protoc
+          go install google.golang.org/protobuf/cmd/protoc-gen-go@latest
+          go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest
+          export PATH=$PATH:$HOME/go/bin
+          go generate .
+          go test .
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v3
+        with:
+          version: latest
+          working-directory: kuksa_go_client

README.md

@@ -24,6 +24,7 @@ Component |  Content | Comment/Status
 [Seat Service](seat_service) | C++ service example
 [eCAL Provider](ecal2val) | Python provider for [eCAL](https://projects.eclipse.org/projects/automotive.ecal)
 [PS4/PS5 - 2021 Formula Provider](./fone2val) | F1 Telemetrydata source for [KUKSA Databroker](https://github.com/eclipse/kuksa.val/tree/master/kuksa_databroker)
+[KUKSA GO Client](kuksa_go_client)   | Example client written in the [GO](https://go.dev/) programming language for easy interaction with KUKSA Databroker and Server
 
 ## Contribution
 

kuksa_go_client/.gitignore

@@ -0,0 +1,3 @@
+kuksa_go_client
+.vscode
+*.zip

kuksa_go_client/README.md

@@ -0,0 +1,101 @@
+# Running the KUKSA golang Client
+
+## Execute the example
+
+### Set everything up for the KUKSA.val GO client
+- If you do not have GO installed follow this [page](https://go.dev/doc/install) and install v1.18 or above
+- If you do not have a protobuf compiler installed execute the following from this directory:
+```
+> go run protocInstall/protocInstall.go
+```
+Or install the protobuf compiler yourself(https://grpc.io/docs/protoc-installation/)
+- Add the protobuf compiler (e.g. HOME_DIR/protoc/bin) to your PATH variable. For example for linux do:
+```
+> export PATH=$PATH:$HOME/protoc/bin
+```
+
+If using a newer Linux version that has protoc >= 3.19 by default you may alternatively install the protobuf compiler with apt:
+
+```
+> sudo apt install protobuf-compiler
+```
+
+if you use `apt`you must manually create a folder called `proto`
+
+
+```
+> mkdir proto
+```
+
+- Run the following command to install the needed GO protocol buffers plugins:
+```
+> go install google.golang.org/protobuf/cmd/protoc-gen-go@latest
+> go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest
+```
+The plugins will be installed in $GOBIN, defaulting to $GOPATH/bin which is default HOME_DIR/go/bin. It must be in your $PATH for the protocol compiler protoc to find it.
+For linux execute:
+```
+> export PATH=$PATH:$HOME/go/bin
+```
+- Then execute
+```
+> go generate .
+```
+if you encounter a problem, you have to give the protoc executable the right to be executed e.g in Linux run
+```
+> sudo chmod +x <HOME_DIR>/protoc/bin/protoc
+```
+### Run the KUKSA.val GO client
+#### Start KUKSA.val Server or Databroker
+- Build kuksa.val and start the server
+```
+> cd kuksa.val/kuksa-val-server/build/src/
+> ./kuksa-val-server
+```
+- Alternatively, start the appropriate docker container.
+```
+> docker run -it --rm --net=host -p 127.0.0.1:8090:8090 -e LOG_LEVEL=ALL ghcr.io/eclipse/kuksa.val/kuksa-val:master
+```
+- Build and run KUKSA.val Databroker by executing:
+```
+> cargo run --bin databroker
+```
+- Alternatively, start the apropriate docker container.
+```
+> docker run -it --rm --net=host ghcr.io/eclipse/kuksa.val/databroker:master
+```
+- To run the GO Client execute:
+```
+> go build .
+> go run .
+```
+- Alternatively, execute:
+```
+> ./kuksa_go_client
+```
+
+### Configuration of the KUKSA.val GO client
+The GO clients reads the configuration file `kuksa-client.json`. In this repository example configurations for both
+KUKSA.val Databroker (`kuksa-client-grpc.json`) and KUKSA.val Server (`kuksa-client-ws.json`) exists.
+The file `kuksa-client.json` is by default linked to `kuksa-client-grpc.json`.
+
+For using the GO client with the kuksa.val server set protocol = ws and for a connection to kuksa.val Databroker set protocol = grpc. On the command line it's available through -protocol ws/grpc.
+
+*Note: For communication with KUKSA Databroker only insecure mode is supported, TLS can not be used!*
+
+### Dependency updates
+
+If dependencies needs to be updated the following commands can be used:
+
+```
+go generate .
+go get -u
+go mod tidy
+```
+
+This will update `go.mod`and `go.sum`.
+
+## Linters
+
+Our Continuous Integration verifies that the code pass the [Golang Linter](https://golangci-lint.run/usage/install).
+To avoid failing PR builds it is recommended to run the linter manually before creating a Pull Request.

kuksa_go_client/client_test.go

@@ -0,0 +1,201 @@
+//********************************************************************************
+// Copyright (c) 2022 Contributors to the Eclipse Foundation
+//
+// See the NOTICE file(s) distributed with this work for additional
+// information regarding copyright ownership.
+//
+// This program and the accompanying materials are made available under the
+// terms of the Apache License 2.0 which is available at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// SPDX-License-Identifier: Apache-2.0
+// ********************************************************************************/
+
+package main
+
+import (
+	"github.com/eclipse-kuksa/kuksa-incubation/kuksa_go_client/kuksa_client"
+	"testing"
+)
+
+// Note: Go support two methods to write a string
+//
+// Using double quotes
+// var myvar := "hello \"there\""
+//
+// Using back quotes (raw strings)
+// var myvar := `hello "there"`
+//
+// Single quotes only allowed for literals/runes, like 'w'
+
+func TestArrayParseNoQuote(t *testing.T) {
+
+	array, _ := kuksa_client.GetArrayFromInput[string](`[say hello, abc]`)
+	if len(array) != 2 {
+		t.Fail()
+	}
+	if array[0] != "say hello" {
+		t.Fail()
+	}
+	if array[1] != "abc" {
+		t.Fail()
+	}
+}
+
+func TestArrayParseNoInsideQuote(t *testing.T) {
+
+	array, _ := kuksa_client.GetArrayFromInput[string](`["say hello","abc"]`)
+	if len(array) != 2 {
+		t.Fail()
+	}
+	if array[0] != "say hello" {
+		t.Fail()
+	}
+	if array[1] != "abc" {
+		t.Fail()
+	}
+}
+
+func TestArrayParseNoInsideQuoteSingle(t *testing.T) {
+
+	array, _ := kuksa_client.GetArrayFromInput[string](`['say hello','abc']`)
+	if len(array) != 2 {
+		t.Fail()
+	}
+	if array[0] != "say hello" {
+		t.Fail()
+	}
+	if array[1] != "abc" {
+		t.Fail()
+	}
+}
+
+func TestArrayParseDoubleQuote(t *testing.T) {
+
+	array, _ := kuksa_client.GetArrayFromInput[string](`["say \"hello\"","abc"]`)
+	if len(array) != 2 {
+		t.Fail()
+	}
+	if array[0] != `say "hello"` {
+		t.Fail()
+	}
+	if array[1] != "abc" {
+		t.Fail()
+	}
+}
+
+func TestArrayParseSingleQuote(t *testing.T) {
+
+	array, _ := kuksa_client.GetArrayFromInput[string](`[say \'hello\',"abc"]`)
+	if len(array) != 2 {
+		t.Fail()
+	}
+	if array[0] != `say 'hello'` {
+		t.Fail()
+	}
+	if array[1] != "abc" {
+		t.Fail()
+	}
+}
+
+func TestArrayParseComma(t *testing.T) {
+
+	array, _ := kuksa_client.GetArrayFromInput[string](`["say, hello","abc"]`)
+	if len(array) != 2 {
+		t.Fail()
+	}
+	if array[0] != `say, hello` {
+		t.Fail()
+	}
+	if array[1] != "abc" {
+		t.Fail()
+	}
+}
+
+func TestArraySquare(t *testing.T) {
+
+	array, _ := kuksa_client.GetArrayFromInput[string](`[say hello[], abc]`)
+	if len(array) != 2 {
+		t.Fail()
+	}
+	if array[0] != `say hello[]` {
+		t.Fail()
+	}
+	if array[1] != "abc" {
+		t.Fail()
+	}
+}
+
+func TestArrayEmptyStringQuoted(t *testing.T) {
+
+	array, _ := kuksa_client.GetArrayFromInput[string](`["", abc]`)
+	if len(array) != 2 {
+		t.Fail()
+	}
+	if array[0] != `` {
+		t.Fail()
+	}
+	if array[1] != "abc" {
+		t.Fail()
+	}
+}
+
+func TestArrayEmptyStringNotQuoted(t *testing.T) {
+	// First item shall be ignored
+	array, _ := kuksa_client.GetArrayFromInput[string](`[, abc]`)
+	if len(array) != 1 {
+		t.Fail()
+	}
+	if array[0] != "abc" {
+		t.Fail()
+	}
+}
+
+func TestDoubleComma(t *testing.T) {
+	// In this case the middle item is ignored
+	array, _ := kuksa_client.GetArrayFromInput[string](`[def,, abc]`)
+	if len(array) != 2 {
+		t.Fail()
+	}
+	if array[0] != "def" {
+		t.Fail()
+	}
+	if array[1] != "abc" {
+		t.Fail()
+	}
+}
+
+func TestQuotesInStringValues(t *testing.T) {
+	array, _ := kuksa_client.GetArrayFromInput[string](`["dtc1, dtc2", dtc3, \" dtc4, dtc4\"]`)
+	if len(array) != 4 {
+		t.Fail()
+	}
+	if array[0] != "dtc1, dtc2" {
+		t.Fail()
+	}
+	if array[1] != "dtc3" {
+		t.Fail()
+	}
+	if array[2] != "\" dtc4" {
+		t.Fail()
+	}
+	if array[3] != "dtc4\"" {
+		t.Fail()
+	}
+}
+
+func TestQuotesInStringValues2(t *testing.T) {
+	array, _ := kuksa_client.GetArrayFromInput[string]("['dtc1, dtc2', dtc3, \" dtc4, dtc4\"]")
+	if len(array) != 3 {
+		t.Fail()
+	}
+	if array[0] != "dtc1, dtc2" {
+		t.Fail()
+	}
+	if array[1] != "dtc3" {
+		t.Fail()
+	}
+	if array[2] != " dtc4, dtc4" {
+		t.Fail()
+	}
+}