forked from a8m/enter
/
main.go
144 lines (135 loc) · 3.49 KB
/
main.go
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package main
import (
"bytes"
"flag"
"io/ioutil"
"log"
"strings"
"text/template"
"entgo.io/ent/entc"
"entgo.io/ent/entc/gen"
)
func main() {
formatPtr := flag.String("format", "html", "Format to output (html, md)")
outPtr := flag.String("out", "er.html", "Output file name")
flag.Parse()
path := flag.Arg(0)
if path == "" {
path = "./ent/schema"
}
graph, err := entc.LoadGraph(path, &gen.Config{})
if err != nil {
log.Fatalln(err)
}
var b bytes.Buffer
tmpl := htmlTmpl
out := "er.html"
if *formatPtr == "md" {
tmpl = mdTmpl
out = "er.md"
}
if *outPtr != "" {
out = *outPtr
}
if err := tmpl.Execute(&b, graph); err != nil {
log.Fatal(err)
}
if err := ioutil.WriteFile(out, b.Bytes(), 0644); err != nil {
log.Fatal(err)
}
}
var mdTmpl = template.Must(template.New("er").
Funcs(template.FuncMap{
"fmtType": func(s string) string {
return strings.NewReplacer(
".", "DOT",
"*", "STAR",
"[", "LBRACK",
"]", "RBRACK",
).Replace(s)
},
}).
Parse(`{{- with $.Nodes }}
` + "```" + `mermaid
erDiagram
{{- range $n := . }}
{{ $n.Name }} {
{{- if $n.HasOneFieldID }}
{{ fmtType $n.ID.Type.String }} {{ $n.ID.Name }}
{{- end }}
{{- range $f := $n.Fields }}
{{ fmtType $f.Type.String }} {{ $f.Name }}
{{- end }}
}
{{- end }}
{{- range $n := . }}
{{- range $e := $n.Edges }}
{{- if not $e.IsInverse }}
{{- $rt := "|o--o|" }}{{ if $e.O2M }}{{ $rt = "|o--o{" }}{{ else if $e.M2O }}{{ $rt = "}o--o|" }}{{ else if $e.M2M }}{{ $rt = "}o--o{" }}{{ end }}
{{ $n.Name }} {{ $rt }} {{ $e.Type.Name }} : "{{ $e.Name }}{{ with $e.Ref }}/{{ .Name }}{{ end }}"
{{- end }}
{{- end }}
{{- end }}
` + "```" + `
{{- end }}`))
var htmlTmpl = template.Must(template.New("er").
Funcs(template.FuncMap{
"fmtType": func(s string) string {
return strings.NewReplacer(
".", "DOT",
"*", "STAR",
"[", "LBRACK",
"]", "RBRACK",
).Replace(s)
},
}).
Parse(`<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
</head>
<body>
{{- with $.Nodes }}
<div class="mermaid" id="er-diagram">
erDiagram
{{- range $n := . }}
{{ $n.Name }} {
{{- if $n.HasOneFieldID }}
{{ fmtType $n.ID.Type.String }} {{ $n.ID.Name }}
{{- end }}
{{- range $f := $n.Fields }}
{{ fmtType $f.Type.String }} {{ $f.Name }}
{{- end }}
}
{{- end }}
{{- range $n := . }}
{{- range $e := $n.Edges }}
{{- if not $e.IsInverse }}
{{- $rt := "|o--o|" }}{{ if $e.O2M }}{{ $rt = "|o--o{" }}{{ else if $e.M2O }}{{ $rt = "}o--o|" }}{{ else if $e.M2M }}{{ $rt = "}o--o{" }}{{ end }}
{{ $n.Name }} {{ $rt }} {{ $e.Type.Name }} : "{{ $e.Name }}{{ with $e.Ref }}/{{ .Name }}{{ end }}"
{{- end }}
{{- end }}
{{- end }}
</div>
{{- end }}
<script src="https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js"></script>
<script src="https://unpkg.com/panzoom@9.4.3/dist/panzoom.min.js"></script>
<script>
mermaid.mermaidAPI.initialize({
startOnLoad: true,
});
var observer = new MutationObserver((event) => {
document.querySelectorAll('text[id^=text-entity]').forEach(text => {
text.textContent = text.textContent.replace('DOT', '.');
text.textContent = text.textContent.replace('STAR', '*');
text.textContent = text.textContent.replace('LBRACK', '[');
text.textContent = text.textContent.replace('RBRACK', ']');
});
observer.disconnect();
panzoom(document.getElementById('er-diagram'));
});
observer.observe(document.getElementById('er-diagram'), { attributes: true, childList: true });
</script>
</body>
</html>
`))