117 lines
2.9 KiB
Go
117 lines
2.9 KiB
Go
package main
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import (
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"html"
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"net/http"
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"os"
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"path/filepath"
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"strings"
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)
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func ChangelogPage(w http.ResponseWriter, r *http.Request) {
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markdown := readChangelog()
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body := `
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<header class="tool-header">
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<h2 class="tool-title">Changelog</h2>
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<p class="tool-description">Loaded from README.md.</p>
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</header>
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<section class="tool-panel changelog-panel">
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<div class="panel-body changelog-content">
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` + renderChangelogMarkdown(markdown) + `
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</div>
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</section>
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<style>
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.changelog-panel { max-width: 840px; }
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.changelog-content h1 { margin: 0 0 14px; font-size: 20px; line-height: 1.25; }
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.changelog-content h2 { margin: 18px 0 8px; padding-top: 12px; border-top: 1px solid #333; font-size: 15px; line-height: 1.3; }
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.changelog-content ul { margin: 6px 0 12px; padding-left: 20px; }
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.changelog-content li { margin: 4px 0; line-height: 1.45; }
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.changelog-content p { margin: 8px 0; line-height: 1.5; }
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</style>`
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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_, _ = w.Write([]byte(Page("/changelog", "Changelog", body)))
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}
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func readChangelog() string {
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for _, start := range changelogSearchRoots() {
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for _, candidate := range changelogCandidates(start) {
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data, err := os.ReadFile(candidate)
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if err == nil {
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return string(data)
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}
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}
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}
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return "# Changelog\n\nREADME.md was not found."
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}
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func changelogSearchRoots() []string {
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roots := []string{}
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if wd, err := os.Getwd(); err == nil {
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roots = append(roots, wd)
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}
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roots = append(roots, appDir())
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return roots
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}
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func changelogCandidates(start string) []string {
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candidates := []string{}
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dir := filepath.Clean(start)
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for i := 0; i < 5; i++ {
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candidates = append(candidates, filepath.Join(dir, "README.md"))
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parent := filepath.Dir(dir)
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if parent == dir {
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break
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}
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dir = parent
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}
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return candidates
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}
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func renderChangelogMarkdown(markdown string) string {
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lines := strings.Split(strings.ReplaceAll(markdown, "\r\n", "\n"), "\n")
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var out strings.Builder
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inList := false
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closeList := func() {
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if inList {
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out.WriteString("</ul>")
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inList = false
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}
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}
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for _, rawLine := range lines {
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line := strings.TrimSpace(rawLine)
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if line == "" {
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closeList()
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continue
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}
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if strings.HasPrefix(line, "### ") {
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closeList()
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out.WriteString("<h2>" + html.EscapeString(strings.TrimSpace(line[4:])) + "</h2>")
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continue
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}
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if strings.HasPrefix(line, "## ") {
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closeList()
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out.WriteString("<h2>" + html.EscapeString(strings.TrimSpace(line[3:])) + "</h2>")
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continue
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}
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if strings.HasPrefix(line, "# ") {
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closeList()
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out.WriteString("<h1>" + html.EscapeString(strings.TrimSpace(line[2:])) + "</h1>")
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continue
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}
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if strings.HasPrefix(line, "- ") {
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if !inList {
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out.WriteString("<ul>")
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inList = true
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}
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out.WriteString("<li>" + html.EscapeString(strings.TrimSpace(line[2:])) + "</li>")
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continue
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}
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closeList()
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out.WriteString("<p>" + html.EscapeString(line) + "</p>")
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}
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closeList()
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return out.String()
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}
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