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// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
//go:build ignore
/*
This tool is used to compare the CSS names in a chroma builtin styles with the Gitea theme CSS names.
It outputs the difference between the two sets of CSS names, eg:
```
CSS names not in builtin:
.chroma .ln
----
Builtin CSS names not in file:
.chroma .vm
```
Developers could use this tool to re-sync the CSS names in the Gitea theme.
*/
package main
import (
"os"
"regexp"
"strings"
"github.com/alecthomas/chroma/v2"
)
func main() {
if len(os.Args) != 2 {
println("Usage: chroma-style-diff css-or-less-file")
os.Exit(1)
}
data, err := os.ReadFile(os.Args[1])
if err != nil {
println(err.Error())
os.Exit(1)
}
content := string(data)
// a simple CSS parser to collect CSS names
content = regexp.MustCompile("//.*\r?\n").ReplaceAllString(content, "\n")
content = regexp.MustCompile("/\\*.*?\\*/").ReplaceAllString(content, "")
matches := regexp.MustCompile("\\s*([-.#:\\w\\s]+)\\s*\\{[^}]*}").FindAllStringSubmatch(content, -1)
cssNames := map[string]bool{}
for _, matchGroup := range matches {
cssName := strings.TrimSpace(matchGroup[1])
cssNames[cssName] = true
}
// collect Chroma builtin CSS names
builtin := map[string]bool{}
for tokenType, cssName := range chroma.StandardTypes {
if tokenType > 0 && cssName != "" {
builtin[".chroma ."+cssName] = true
}
}
// show the diff
println("CSS names not in builtin:")
for cssName := range cssNames {
if !builtin[cssName] {
println(cssName)
}
}
println("----")
println("Builtin CSS names not in file:")
for cssName := range builtin {
if !cssNames[cssName] {
println(cssName)
}
}
}
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