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package main
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import (
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"os"
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"path/filepath"
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"strings"
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"testing"
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// Every comment in this tree is one line, which is a standing instruction, so a test holds it.
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func TestEveryCommentIsOneLine(t *testing.T) {
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root, err := filepath.Abs("../..")
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if err != nil {
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t.Fatal(err)
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skip := map[string]bool{".git": true, "plans": true, "misc": true, ".playwright-mcp": true}
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err = filepath.WalkDir(root, func(path string, d os.DirEntry, err error) error {
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if err != nil {
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return nil
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if d.IsDir() {
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if skip[d.Name()] {
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return filepath.SkipDir
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return nil
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switch filepath.Ext(path) {
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case ".go", ".js", ".css":
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default:
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return nil
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body, err := os.ReadFile(path)
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if err != nil {
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return nil
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where := strings.TrimPrefix(path, root+string(filepath.Separator))
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run, start := 0, 0
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for i, line := range strings.Split(string(body), "\n") {
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if strings.HasPrefix(strings.TrimSpace(line), "//") {
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if run == 0 {
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start = i + 1
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run++
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continue
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if run > 1 {
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t.Errorf("%s:%d has a %d line comment block, and every comment here is one line", where, start, run)
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run = 0
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if run > 1 {
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t.Errorf("%s:%d has a %d line comment block, and every comment here is one line", where, start, run)
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if strings.Contains(string(body), "/*") && filepath.Ext(path) == ".css" {
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for i, line := range strings.Split(string(body), "\n") {
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open := strings.Contains(line, "/*")
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if open && !strings.Contains(line[strings.Index(line, "/*"):], "*/") {
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t.Errorf("%s:%d opens a css comment it does not close on the same line", where, i+1)
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return nil
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})
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if err != nil {
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t.Fatal(err)