Reimplement tools/rw-heatmaps in go

tools/rw-heatmaps/README.md

@@ -2,25 +2,69 @@
 
 `etcd/tools/rw-heatmaps` is the mixed read/write performance evaluation tool for etcd clusters.
 
+## Installation
+
+Install the tool by running the following command from the etcd source directory.
+
+```sh
+  $ go install -v ./tools/rw-heatmaps
+```
+
+The installation will place executables in the $GOPATH/bin. If $GOPATH environment variable is not set, the tool will be installed into the $HOME/go/bin. You can also find out the installed location by running the following command from the etcd source directory. Make sure that $PATH is set accordingly in your environment.
+
+```sh
+  $ go list -f "{{.Target}}" ./tools/rw-heatmaps
+```
+
+Alternatively, instead of installing the tool, you can use it by simply running the following command from the etcd source directory.
+
+```sh
+  $ go run ./tools/rw-heatmaps
+```
+
 ## Execute
 
 ### Benchmark
+
 To get a mixed read/write performance evaluation result:
 ```sh
-# run with default configurations and specify the working directory
-./rw-benchmark.sh -w ${WORKING_DIR}
+  # run with default configurations and specify the working directory
+  $ ./rw-benchmark.sh -w ${WORKING_DIR}
 ```
 `rw-benchmark.sh` will automatically use the etcd binary compiled under `etcd/bin/` directory.
 
-Note: the result csv file will be saved to current working directory. The working directory is where etcd database is saved. The working directory is designed for scenarios where a different mounted disk is preferred.
+Note: the result CSV file will be saved to current working directory. The working directory is where etcd database is saved. The working directory is designed for scenarios where a different mounted disk is preferred.
 
 ### Plot Graphs
-To generate two images (read and write) based on the benchmark result csv file:
+
+To generate two images (read and write) based on the benchmark result CSV file:
+
+```sh
+  # to generate a pair of read & write images from one data csv file
+  $ rw-heatmaps ${CSV_FILE} -t ${IMAGE_TITLE} -o ${OUTPUT_IMAGE_NAME}
+```
+
+To generate two images (read and write) showing the performance difference from two result CSV files:
+
+```sh
+  # to generate a pair of read & write images from one data csv file
+  $ rw-heatmaps ${CSV_FILE1} ${CSV_FILE2} -t ${IMAGE_TITLE} -o ${OUTPUT_IMAGE_NAME}
+```
+
+To see the available options use the `--help` option.
+
 ```sh
-# to generate a pair of read & write images from one data csv file
-./plot_data.py ${FIRST_CSV_FILE} -t ${IMAGE_TITLE} -o ${OUTPUT_IMAGE_NAME}
+  $ rw-heatmaps --help
+
+rw-heatmaps is a tool to generate read/write heatmaps images for etcd3.
 
+Usage:
+  rw-heatmaps [input file(s) in csv format] [flags]
 
-# to generate a pair of read & write images by comparing two data csv files
-./plot_data.py ${FIRST_CSV_FILE} ${SECOND_CSV_FILE} -t ${IMAGE_TITLE} -o ${OUTPUT_IMAGE_NAME}
+Flags:
+  -h, --help                       help for rw-heatmaps
+  -f, --output-format string       output image file format (default "jpg")
+  -o, --output-image-file string   output image filename (required)
+  -t, --title string               plot graph title (required)
+      --zero-centered              plot the improvement graph with white color represents 0.0 (default true)
 ```

tools/rw-heatmaps/cmd/root.go

@@ -0,0 +1,105 @@
+// Copyright 2024 The etcd 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 cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
+
+	"go.etcd.io/etcd/tools/rw-heatmaps/v3/pkg/chart"
+	"go.etcd.io/etcd/tools/rw-heatmaps/v3/pkg/dataset"
+)
+
+var (
+	// ErrMissingTitleArg is returned when the title argument is missing.
+	ErrMissingTitleArg = fmt.Errorf("missing title argument")
+	// ErrMissingOutputImageFileArg is returned when the output image file argument is missing.
+	ErrMissingOutputImageFileArg = fmt.Errorf("missing output image file argument")
+	// ErrMissingInputFileArg is returned when the input file argument is missing.
+	ErrMissingInputFileArg = fmt.Errorf("missing input file argument")
+	// ErrInvalidOutputFormat is returned when the output format is invalid.
+	ErrInvalidOutputFormat = fmt.Errorf("invalid output format, must be one of png, jpg, jpeg, tiff")
+)
+
+// NewRootCommand returns the root command for the rw-heatmaps tool.
+func NewRootCommand() *cobra.Command {
+	o := newOptions()
+	rootCmd := &cobra.Command{
+		Use:   "rw-heatmaps [input file(s) in csv format]",
+		Short: "A tool to generate read/write heatmaps for etcd3",
+		Long:  "rw-heatmaps is a tool to generate read/write heatmaps images for etcd3.",
+		Args:  cobra.RangeArgs(1, 2),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			if err := o.Validate(); err != nil {
+				return err
+			}
+
+			datasets := make([]*dataset.DataSet, len(args))
+			for i, arg := range args {
+				var err error
+				if datasets[i], err = dataset.LoadCSVData(arg); err != nil {
+					return err
+				}
+			}
+
+			return chart.PlotHeatMaps(datasets, o.title, o.outputImageFile, o.outputFormat, o.zeroCentered)
+		},
+	}
+
+	o.AddFlags(rootCmd.Flags())
+	return rootCmd
+}
+
+// options holds the options for the command.
+type options struct {
+	title           string
+	outputImageFile string
+	outputFormat    string
+	zeroCentered    bool
+}
+
+// newOptions returns a new options for the command with the default values applied.
+func newOptions() options {
+	return options{
+		outputFormat: "jpg",
+		zeroCentered: true,
+	}
+}
+
+// AddFlags sets the flags for the command.
+func (o *options) AddFlags(fs *pflag.FlagSet) {
+	fs.StringVarP(&o.title, "title", "t", o.title, "plot graph title (required)")
+	fs.StringVarP(&o.outputImageFile, "output-image-file", "o", o.outputImageFile, "output image filename (required)")
+	fs.StringVarP(&o.outputFormat, "output-format", "f", o.outputFormat, "output image file format")
+	fs.BoolVar(&o.zeroCentered, "zero-centered", o.zeroCentered, "plot the improvement graph with white color represents 0.0")
+}
+
+// Validate returns an error if the options are invalid.
+func (o *options) Validate() error {
+	if o.title == "" {
+		return ErrMissingTitleArg
+	}
+	if o.outputImageFile == "" {
+		return ErrMissingOutputImageFileArg
+	}
+	switch o.outputFormat {
+	case "png", "jpg", "jpeg", "tiff":
+	default:
+		return ErrInvalidOutputFormat
+	}
+	return nil
+}

tools/rw-heatmaps/go.mod

@@ -0,0 +1,23 @@
+module go.etcd.io/etcd/tools/rw-heatmaps/v3
+
+go 1.21
+
+require (
+	github.com/spf13/cobra v1.8.0
+	github.com/spf13/pflag v1.0.5
+	gonum.org/v1/plot v0.14.0
+)
+
+require (
+	git.sr.ht/~sbinet/gg v0.5.0 // indirect
+	github.com/ajstarks/svgo v0.0.0-20211024235047-1546f124cd8b // indirect
+	github.com/campoy/embedmd v1.0.0 // indirect
+	github.com/go-fonts/liberation v0.3.1 // indirect
+	github.com/go-latex/latex v0.0.0-20230307184459-12ec69307ad9 // indirect
+	github.com/go-pdf/fpdf v0.8.0 // indirect
+	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	golang.org/x/image v0.11.0 // indirect
+	golang.org/x/text v0.12.0 // indirect
+)

tools/rw-heatmaps/go.sum

@@ -0,0 +1,92 @@
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tools/rw-heatmaps/main.go

@@ -0,0 +1,29 @@
+// Copyright 2024 The etcd 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 (
+	"fmt"
+	"os"
+
+	"go.etcd.io/etcd/tools/rw-heatmaps/v3/cmd"
+)
+
+func main() {
+	if err := cmd.NewRootCommand().Execute(); err != nil {
+		fmt.Fprintf(os.Stderr, "error: %v\n", err.Error())
+		os.Exit(1)
+	}
+}