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cov.go
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cov.go
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// Copyright (c) 2023 Volvo Car Corporation
// SPDX-License-Identifier: Apache-2.0
package main
import (
"bufio"
"bytes"
"embed"
"errors"
"fmt"
"html/template"
"io"
"log/slog"
"os"
"os/exec"
"path/filepath"
"strconv"
"strings"
)
//go:embed badge.svg.tpl
var tplFS embed.FS
func CoverP() {
coverOutput := "cover.out"
coverMode := "count" // see `go help testflag` for more info
iferr(
Go(
append(
[]string{"test"}, append(
listLibFolders(),
"-coverprofile="+coverOutput,
"-covermode="+coverMode,
)...,
)...,
// "test",
// // recDir,
// listLibFolders(),
// "-coverprofile="+coverOutput,
// "-covermode="+coverMode,
),
)
var buf bytes.Buffer
iferr(coverPct(&buf, coverOutput))
pct, err := parseCovPct(&buf)
iferr(err)
s, err := badgetpl(pct)
iferr(err)
iferr(writeBadge(".github/coverage.svg", []byte(s)))
fmt.Printf("✅ coverage: %v%%\n", pct)
}
const (
brightgreen = "#4c1"
green = "#97ca00"
yellow = "#dfb317"
yellowgreen = "#a4a61d"
orange = "#fe7d37"
red = "#e05d44"
)
func badgetpl(pct float64) (string, error) {
color := ""
switch {
case pct < 50:
color = orange
case pct < 60:
color = yellow
case pct < 70:
color = yellowgreen
case pct < 80:
color = green
case pct < 90:
color = brightgreen
default:
color = red
}
t := template.Must(template.ParseFS(tplFS, "badge.svg.tpl"))
data := struct {
Percentage float64
Color string
}{Percentage: pct, Color: color}
var buf bytes.Buffer
err := t.Execute(&buf, data)
if err != nil {
return "", err
}
return buf.String(), nil
}
func writeBadge(path string, b []byte) error {
_, err := os.Stat(filepath.Dir(path))
if os.IsNotExist(err) {
err = os.MkdirAll(filepath.Dir(path), 0o755)
}
if err != nil {
return err
}
f, err := os.Create(path)
if err != nil {
return err
}
defer func() {
err = errors.Join(err, f.Close())
}()
_, err = f.Write(b)
return err
}
func parseCovPct(r io.Reader) (float64, error) {
s := bufio.NewScanner(r)
for s.Scan() {
t := s.Text()
if strings.HasPrefix(t, "total:") {
f := strings.Fields(t)
if f[0] == "total:" && len(f) == 3 {
return strconv.ParseFloat(strings.TrimRight(f[2], "%"), 64)
}
break
}
}
if err := s.Err(); err != nil {
_, _ = fmt.Fprintln(os.Stderr, "scan:", err)
}
return 0.0, fmt.Errorf("no coverage found")
}
func coverPct(w io.Writer, o string) error {
cmd := exec.Command("go", "tool", "cover", "-func="+o) //nolint:gosec
slog.Info("exec", slog.String("cmd", cmd.String()))
defer slog.Info("done", slog.String("cmd", cmd.String()))
cmd.Stdout = w
cmd.Stderr = os.Stderr
if err := cmd.Run(); err != nil {
_ = os.Stderr.Sync()
return fmt.Errorf("go: %s", err)
}
return nil
}
func listLibFolders() []string {
cmd := exec.Command("go", "list", "./pkg/...")
slog.Info("exec", slog.String("cmd", cmd.String()))
defer slog.Info("done", slog.String("cmd", cmd.String()))
o, err := cmd.CombinedOutput()
iferr(err)
var buf bytes.Buffer
buf.Write(o)
s := bufio.NewScanner(&buf)
res := make([]string, 0)
for s.Scan() {
res = append(res, s.Text())
}
return res
}