first commit
This commit is contained in:
m15o
commit
cfcd2ed6eb
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.idea
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bin
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*~
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build:
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CGO_ENABLED=0 GOARCH=amd64 GOOS=linux go build -o bin/ni main.go
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package gmi2html
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import (
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"html"
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"regexp"
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"strings"
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)
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var heading1Regexp = regexp.MustCompile("^# (.*)$")
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var heading2Regexp = regexp.MustCompile("^## (.*)$")
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var heading3Regexp = regexp.MustCompile("^### (.*)$")
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var linkRegexp = regexp.MustCompile("^=> ([^\\s]+) ?(.+)?$")
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var blockquoteRegexp = regexp.MustCompile("^> (.*)$")
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var preRegexp = regexp.MustCompile("^```.*$")
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var bulletRegexp = regexp.MustCompile(`^\* ?(.*)$`)
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func clearLinkMode(linkMode *bool, rv *[]string) {
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if *linkMode {
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*rv = append(*rv, "</p>")
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*linkMode = false
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}
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}
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func clearUlMode(ulMode *bool, rv *[]string) {
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if *ulMode {
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*rv = append(*rv, "</ul>")
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*ulMode = false
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}
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}
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func sanitize(input string) string {
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return html.EscapeString(input)
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}
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func Convert(gmi string) string {
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var rv []string
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preMode := false
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ulMode := false
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linkMode := false
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for _, l := range strings.Split(gmi, "\n") {
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l = strings.TrimRight(l, "\r")
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if preMode {
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switch {
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case preRegexp.MatchString(l):
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rv = append(rv, "</pre>")
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preMode = false
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default:
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rv = append(rv, sanitize(l))
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}
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} else {
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switch {
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case heading1Regexp.MatchString(l):
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clearUlMode(&ulMode, &rv)
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clearLinkMode(&linkMode, &rv)
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matches := heading1Regexp.FindStringSubmatch(l)
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rv = append(rv, "<h1>"+sanitize(matches[1])+"</h1>")
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case heading2Regexp.MatchString(l):
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clearUlMode(&ulMode, &rv)
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clearLinkMode(&linkMode, &rv)
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matches := heading2Regexp.FindStringSubmatch(l)
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rv = append(rv, "<h2>"+sanitize(matches[1])+"</h2>")
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case heading3Regexp.MatchString(l):
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clearUlMode(&ulMode, &rv)
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clearLinkMode(&linkMode, &rv)
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matches := heading3Regexp.FindStringSubmatch(l)
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rv = append(rv, "<h3>"+sanitize(matches[1])+"</h3>")
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case blockquoteRegexp.MatchString(l):
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clearUlMode(&ulMode, &rv)
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clearLinkMode(&linkMode, &rv)
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matches := blockquoteRegexp.FindStringSubmatch(l)
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rv = append(rv, "<blockquote>"+sanitize(matches[1])+"</blockquote>")
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case linkRegexp.MatchString(l):
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clearUlMode(&ulMode, &rv)
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matches := linkRegexp.FindStringSubmatch(l)
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if len(matches[2]) == 0 {
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matches[2] = matches[1]
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}
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if strings.HasSuffix(matches[1], ".png") || strings.HasSuffix(matches[1], ".PNG") || strings.HasSuffix(matches[1], ".jpg") || strings.HasSuffix(matches[1], ".JPG") || strings.HasSuffix(matches[1], ".jpeg") || strings.HasSuffix(matches[1], ".gif") || strings.HasSuffix(matches[1], ".GIF") {
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rv = append(rv, "<img src=\""+sanitize(matches[1])+"\"/>")
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continue
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}
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if linkMode {
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rv = append(rv, "<a href=\""+sanitize(matches[1])+"\">"+sanitize(matches[2])+"</a><br/>")
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continue
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}
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rv = append(rv, "<p><a href=\""+sanitize(matches[1])+"\">"+sanitize(matches[2])+"</a><br/>")
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linkMode = true
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case preRegexp.MatchString(l):
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clearUlMode(&ulMode, &rv)
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clearLinkMode(&linkMode, &rv)
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rv = append(rv, "<pre>")
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preMode = true
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case bulletRegexp.MatchString(l):
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clearLinkMode(&linkMode, &rv)
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matches := bulletRegexp.FindStringSubmatch(l)
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if ulMode {
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rv = append(rv, "<li>"+sanitize(matches[1])+"</li>")
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continue
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}
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rv = append(rv, "<ul>\n<li>"+sanitize(matches[1])+"</li>")
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ulMode = true
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default:
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clearUlMode(&ulMode, &rv)
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clearLinkMode(&linkMode, &rv)
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if len(l) != 0 {
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rv = append(rv, "<p>"+sanitize(l)+"</p>")
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}
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}
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}
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}
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clearUlMode(&ulMode, &rv)
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clearLinkMode(&linkMode, &rv)
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return strings.Join(rv, "\n")
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}
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package main
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import (
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"bytes"
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"fmt"
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"html/template"
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"io/ioutil"
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"log"
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"ni/gmi2html"
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"os"
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"os/exec"
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"path/filepath"
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"regexp"
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"sort"
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"strings"
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"time"
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)
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var tplPage = `
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{{ define "content" }}
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{{ .Content }}
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{{ if .Backlinks }}
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<h2>Backlinks</h2>
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<ul>
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{{ range .Backlinks }}
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<li><a href="/{{ . }}">{{ . }}</a></li>
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{{ end }}
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</ul>
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{{ end }}
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{{ end }}
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`
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var tplChangelog = `
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{{ define "content" }}
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<ul>
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{{ range . }}
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<li><a href="/{{ .Name }}">{{ .Name }}</a> {{ .TimeFormatted }}</li>
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{{ end }}
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</ul>
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{{ end }}
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`
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var filename = regexp.MustCompile(`^[a-z0-9\-]+\.gmi$`)
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var re = regexp.MustCompile(`\[\[([a-z0-9\-]+)\]\]`)
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var PageContent *template.Template
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var PageChangelog *template.Template
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func backlinks(in, name string) []string {
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var rv []string
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bl, err := exec.Command("/bin/sh", "-c", "grep -l '\\[\\["+name[:len(name)-4]+"\\]\\]' "+in+"/*.gmi").Output()
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if err != nil {
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return rv
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}
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for _, link := range strings.Fields(string(bl)) {
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oname := outputName(link[len(in+"/"):])
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if oname != outputName(name) {
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rv = append(rv, oname)
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}
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}
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return rv
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}
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func process(in, name string, d []byte) []byte {
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html := bytes.NewBufferString("")
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err := PageContent.Execute(html, map[string]interface{}{
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"Title": name,
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"Content": template.HTML(re.ReplaceAllString(gmi2html.Convert(string(d)), `<a href="/$1.html">$1</a>`)),
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"Backlinks": backlinks(in, name),
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})
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if err != nil {
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log.Fatal(err)
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}
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return html.Bytes()
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}
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func buildChangelog(f []File) []byte {
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html := bytes.NewBufferString("")
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err := PageChangelog.Execute(html, f)
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if err != nil {
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log.Fatal(err)
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}
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return html.Bytes()
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}
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type File struct {
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Name string
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UpdatedAt time.Time
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TimeFormatted string
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}
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func outputName(inputName string) string {
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return inputName[:len(inputName)-3] + "html"
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}
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func main() {
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if len(os.Args) != 4 {
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log.Fatal("Usage: ni input output template.html")
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}
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in := os.Args[1]
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out := os.Args[2]
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tpl := os.Args[3]
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b, err := os.ReadFile(tpl)
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if err != nil {
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log.Fatal(err)
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}
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PageContent = template.Must(template.New("").Parse(string(b) + tplPage))
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PageChangelog = template.Must(template.New("").Parse(string(b) + tplChangelog))
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files, err := ioutil.ReadDir(in)
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if err != nil {
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log.Fatal(err)
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}
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var changelog []File
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for _, file := range files {
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if !filename.MatchString(file.Name()) {
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continue
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}
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file, err := os.Stat(filepath.Join(in, file.Name()))
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if err != nil {
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log.Fatal(err)
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}
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updatedAt := file.ModTime()
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changelog = append(changelog, File{
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UpdatedAt: updatedAt,
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TimeFormatted: updatedAt.Format("2006-01-02"),
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Name: outputName(file.Name()),
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})
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data, err := os.ReadFile(filepath.Join(in, file.Name()))
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if err != nil {
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log.Fatal(err)
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}
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output := process(in, file.Name(), data)
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err = os.WriteFile(filepath.Join(out, outputName(file.Name())), output, 0644)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Print(".")
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}
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sort.Slice(changelog, func(i, j int) bool {
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return changelog[i].UpdatedAt.After(changelog[j].UpdatedAt)
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})
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if err != nil {
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log.Fatal(err)
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}
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err = os.WriteFile(filepath.Join(out, "changelog.html"), buildChangelog(changelog), 0644)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Println("Done")
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}
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