Generate formatted perf comment with dynamic Evg URLs

Author: zhouselena

internal/cmd/perfcomp/parseperfcomp/main.go

@@ -0,0 +1,122 @@
+// Copyright (C) MongoDB, Inc. 2025-present.
+//
+// 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
+
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"net/url"
+	"os"
+	"strings"
+)
+
+const parsePerfCompDir = "./internal/cmd/perfcomp/parseperfcomp/"
+const perfReportFileTxt = "perf-report.txt"
+const perfReportFileMd = "perf-report.md"
+const perfVariant = "^perf$"
+
+func main() {
+	var line string
+
+	// open file to read
+	fRead, err := os.Open(parsePerfCompDir + perfReportFileTxt)
+	if err != nil {
+		log.Fatalf("Could not open %s: %v", perfReportFileTxt, err)
+	}
+	defer fRead.Close()
+
+	// open file to write
+	fWrite, err := os.Create(perfReportFileMd)
+	if err != nil {
+		log.Fatalf("Could not create %s: %v", perfReportFileMd, err)
+	}
+	defer fWrite.Close()
+
+	fmt.Fprintf(fWrite, "## 👋GoDriver Performance\n")
+
+	// read the file line by line using scanner
+	scanner := bufio.NewScanner(fRead)
+
+	var version string
+	var evgLink string
+
+	for scanner.Scan() {
+		line = scanner.Text()
+		if strings.Contains(line, "Version ID:") {
+			// parse version
+			version = strings.Split(line, " ")[2]
+		} else if strings.Contains(line, "Commit SHA:") {
+			// parse commit SHA and write header
+			fmt.Fprintf(fWrite, "\n<details>\n<summary>%s</summary>\n\t<br>\n\n", line)
+		} else if strings.Contains(line, "version "+version) {
+			// dynamic Evergreen perf task link
+			evgLink, err = generateEvgLink(version, perfVariant)
+			if err != nil {
+				log.Println(err)
+				fmt.Fprintf(fWrite, "%s\n", line)
+			} else {
+				printUrlToLine(fWrite, line, evgLink, "version", -1)
+			}
+		} else if strings.Contains(line, "For a comprehensive view of all microbenchmark results for this PR's commit, please check out the Evergreen perf task for this patch.") {
+			// last line of comment
+			evgLink, err = generateEvgLink(version, "")
+			if err != nil {
+				log.Println(err)
+				fmt.Fprintf(fWrite, "%s\n", line)
+			} else {
+				printUrlToLine(fWrite, line, evgLink, "Evergreen", 0)
+			}
+		} else {
+			// all other regular lines
+			fmt.Fprintf(fWrite, "%s\n", line)
+		}
+	}
+
+	fmt.Fprintf(fWrite, "</details>\n")
+}
+
+func generateEvgLink(version string, variant string) (string, error) {
+	baseUrl := "https://spruce.mongodb.com"
+	page := "0"
+	sorts := "STATUS:ASC;BASE_STATUS:DESC"
+
+	u, err := url.Parse(baseUrl)
+	if err != nil {
+		return "", fmt.Errorf("Error parsing URL: %v", err)
+	}
+
+	u.Path = fmt.Sprintf("version/%s/tasks", version)
+
+	// construct query parameters
+	queryParams := url.Values{}
+	queryParams.Add("page", page)
+	queryParams.Add("sorts", sorts)
+	if variant != "" {
+		queryParams.Add("variant", variant)
+	}
+
+	u.RawQuery = queryParams.Encode()
+	return u.String(), nil
+}
+
+func printUrlToLine(fWrite *os.File, line string, link string, targetWord string, step int) {
+	words := strings.Split(line, " ")
+	for i, w := range words {
+		if i > 0 && words[i+step] == targetWord {
+			fmt.Fprintf(fWrite, "[%s](%s)", w, link)
+		} else {
+			fmt.Fprint(fWrite, w)
+		}
+
+		if i < len(words)-1 {
+			fmt.Fprint(fWrite, " ")
+		} else {
+			fmt.Fprint(fWrite, "\n")
+		}
+	}
+}