Add Google Analytics reporting in place of existing custom reporting (#2015)

Replacing the older analytics with a new Google Analytics based mechanism.

cmd/reporter/Dockerfile.reporter

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+FROM golang:1.14-alpine as godep
+RUN apk add bash ca-certificates git gcc g++ libc-dev
+
+ARG GOPKG=github.com/fission/fission
+
+ENV GO111MODULE=on
+
+WORKDIR /go/src/${GOPKG}
+
+# To reuse build cache, copy go.mod & go.sum and download dependencies first.
+COPY go.* ./
+
+RUN go mod download
+
+FROM godep as builder
+
+ARG GOPKG
+WORKDIR /go/src/${GOPKG}
+
+# Copy whole fission directory to work dir
+COPY ./ ./
+
+WORKDIR /go/src/${GOPKG}/cmd/reporter
+
+ARG GITCOMMIT=unknown
+# E.g. GITCOMMIT=$(git rev-parse HEAD)
+
+ARG BUILDVERSION=unknown
+# E.g. BUILDVERSION=$(git rev-parse HEAD)
+
+ARG BUILDDATE=unknown
+# E.g. BUILDDATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ')
+
+RUN CGO_ENABLED=0 go build \
+    -o /go/bin/reporter \
+    -gcflags=-trimpath=$GOPATH \
+    -asmflags=-trimpath=$GOPATH \
+    -ldflags "-X github.com/fission/fission/pkg/info.GitCommit=${GITCOMMIT} -X github.com/fission/fission/pkg/info.BuildDate=${BUILDDATE} -X github.com/fission/fission/pkg/info.Version=${BUILDVERSION}"
+
+FROM alpine:3.13 as base
+RUN apk add --update ca-certificates
+COPY --from=builder /go/bin/reporter /
+ENTRYPOINT ["/reporter"]

cmd/reporter/app/app.go

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+/*
+Copyright 2021 The Fission Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package app
+
+import (
+	"github.com/spf13/cobra"
+)
+
+func App() *cobra.Command {
+	cobra.EnableCommandSorting = false
+	rootCmd := &cobra.Command{
+		Use:       "reporter",
+		Short:     "Report fission events to analytics service",
+		ValidArgs: []string{"event"},
+		Args:      cobra.OnlyValidArgs,
+	}
+	rootCmd.AddCommand(EventCommand())
+	return rootCmd
+}

cmd/reporter/app/cmd_event.go

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+/*
+Copyright 2021 The Fission Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package app
+
+import (
+	"github.com/fission/fission/pkg/tracker"
+	"github.com/spf13/cobra"
+)
+
+func eventCommandHandler(cmd *cobra.Command, args []string) error {
+	var err error
+	flags := cmd.PersistentFlags()
+
+	event := tracker.Event{}
+
+	event.Category, err = flags.GetString("category")
+	if err != nil {
+		return err
+	}
+
+	event.Action, err = flags.GetString("action")
+	if err != nil {
+		return err
+	}
+
+	event.Label, err = flags.GetString("label")
+	if err != nil {
+		return err
+	}
+
+	event.Value, err = flags.GetString("value")
+	if err != nil {
+		return err
+	}
+
+	return tracker.Tracker.SendEvent(event)
+}
+
+func EventCommand() *cobra.Command {
+	eventCmd := &cobra.Command{
+		Use:   "event",
+		Short: "Report event to analytics",
+		RunE:  eventCommandHandler,
+		Args:  cobra.NoArgs,
+	}
+	persistentFlags := eventCmd.PersistentFlags()
+	persistentFlags.StringP("category", "c", "", "event category")
+	persistentFlags.StringP("action", "a", "", "event action")
+	persistentFlags.StringP("label", "l", "", "event label")
+	persistentFlags.StringP("value", "v", "", "event value")
+	eventCmd.MarkPersistentFlagRequired("category")
+	eventCmd.MarkPersistentFlagRequired("action")
+	return eventCmd
+}

cmd/reporter/main.go

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+/*
+Copyright 2021 The Fission Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"github.com/fission/fission/cmd/reporter/app"
+)
+
+func main() {
+	app.App().Execute()
+}