source: code/trunk/vendor/github.com/alecthomas/chroma/v2/lexers/lexers.go@ 67

package lexers

import (
        "embed"
        "io/fs"

        "github.com/alecthomas/chroma/v2"
)

//go:embed embedded
var embedded embed.FS

// GlobalLexerRegistry is the global LexerRegistry of Lexers.
var GlobalLexerRegistry = func() *chroma.LexerRegistry {
        reg := chroma.NewLexerRegistry()
        // index(reg)
        paths, err := fs.Glob(embedded, "embedded/*.xml")
        if err != nil {
                panic(err)
        }
        for _, path := range paths {
                reg.Register(chroma.MustNewXMLLexer(embedded, path))
        }
        return reg
}()

// Names of all lexers, optionally including aliases.
func Names(withAliases bool) []string {
        return GlobalLexerRegistry.Names(withAliases)
}

// Get a Lexer by name, alias or file extension.
func Get(name string) chroma.Lexer {
        return GlobalLexerRegistry.Get(name)
}

// MatchMimeType attempts to find a lexer for the given MIME type.
func MatchMimeType(mimeType string) chroma.Lexer {
        return GlobalLexerRegistry.MatchMimeType(mimeType)
}

// Match returns the first lexer matching filename.
func Match(filename string) chroma.Lexer {
        return GlobalLexerRegistry.Match(filename)
}

// Register a Lexer with the global registry.
func Register(lexer chroma.Lexer) chroma.Lexer {
        return GlobalLexerRegistry.Register(lexer)
}

// Analyse text content and return the "best" lexer..
func Analyse(text string) chroma.Lexer {
        return GlobalLexerRegistry.Analyse(text)
}

// PlaintextRules is used for the fallback lexer as well as the explicit
// plaintext lexer.
func PlaintextRules() chroma.Rules {
        return chroma.Rules{
                "root": []chroma.Rule{
                        {`.+`, chroma.Text, nil},
                        {`\n`, chroma.Text, nil},
                },
        }
}

// Fallback lexer if no other is found.
var Fallback chroma.Lexer = chroma.MustNewLexer(&chroma.Config{
        Name:      "fallback",
        Filenames: []string{"*"},
        Priority:  -1,
}, PlaintextRules)