1 files changed, 201 insertions, 0 deletions
diff --git a/vendor/github.com/alecthomas/chroma/lexers/internal/api.go b/vendor/github.com/alecthomas/chroma/lexers/internal/api.go
new file mode 100644
index 000000000..12fa45ff8
--- /dev/null
+++ b/vendor/github.com/alecthomas/chroma/lexers/internal/api.go
@@ -0,0 +1,201 @@
+// Package internal contains common API functions and structures shared between lexer packages.
+package internal
+
+import (
+	"path/filepath"
+	"sort"
+	"strings"
+
+	"github.com/alecthomas/chroma"
+)
+
+var (
+	ignoredSuffixes = [...]string{
+		// Editor backups
+		"~", ".bak", ".old", ".orig",
+		// Debian and derivatives apt/dpkg/ucf backups
+		".dpkg-dist", ".dpkg-old", ".ucf-dist", ".ucf-new", ".ucf-old",
+		// Red Hat and derivatives rpm backups
+		".rpmnew", ".rpmorig", ".rpmsave",
+		// Build system input/template files
+		".in",
+	}
+)
+
+// Registry of Lexers.
+var Registry = struct {
+	Lexers  chroma.Lexers
+	byName  map[string]chroma.Lexer
+	byAlias map[string]chroma.Lexer
+}{
+	byName:  map[string]chroma.Lexer{},
+	byAlias: map[string]chroma.Lexer{},
+}
+
+// Names of all lexers, optionally including aliases.
+func Names(withAliases bool) []string {
+	out := []string{}
+	for _, lexer := range Registry.Lexers {
+		config := lexer.Config()
+		out = append(out, config.Name)
+		if withAliases {
+			out = append(out, config.Aliases...)
+		}
+	}
+	sort.Strings(out)
+	return out
+}
+
+// Get a Lexer by name, alias or file extension.
+func Get(name string) chroma.Lexer {
+	if lexer := Registry.byName[name]; lexer != nil {
+		return lexer
+	}
+	if lexer := Registry.byAlias[name]; lexer != nil {
+		return lexer
+	}
+	if lexer := Registry.byName[strings.ToLower(name)]; lexer != nil {
+		return lexer
+	}
+	if lexer := Registry.byAlias[strings.ToLower(name)]; lexer != nil {
+		return lexer
+	}
+
+	candidates := chroma.PrioritisedLexers{}
+	// Try file extension.
+	if lexer := Match("filename." + name); lexer != nil {
+		candidates = append(candidates, lexer)
+	}
+	// Try exact filename.
+	if lexer := Match(name); lexer != nil {
+		candidates = append(candidates, lexer)
+	}
+	if len(candidates) == 0 {
+		return nil
+	}
+	sort.Sort(candidates)
+	return candidates[0]
+}
+
+// MatchMimeType attempts to find a lexer for the given MIME type.
+func MatchMimeType(mimeType string) chroma.Lexer {
+	matched := chroma.PrioritisedLexers{}
+	for _, l := range Registry.Lexers {
+		for _, lmt := range l.Config().MimeTypes {
+			if mimeType == lmt {
+				matched = append(matched, l)
+			}
+		}
+	}
+	if len(matched) != 0 {
+		sort.Sort(matched)
+		return matched[0]
+	}
+	return nil
+}
+
+// Match returns the first lexer matching filename.
+func Match(filename string) chroma.Lexer {
+	filename = filepath.Base(filename)
+	matched := chroma.PrioritisedLexers{}
+	// First, try primary filename matches.
+	for _, lexer := range Registry.Lexers {
+		config := lexer.Config()
+		for _, glob := range config.Filenames {
+			ok, err := filepath.Match(glob, filename)
+			if err != nil { // nolint
+				panic(err)
+			} else if ok {
+				matched = append(matched, lexer)
+			} else {
+				for _, suf := range &ignoredSuffixes {
+					ok, err := filepath.Match(glob+suf, filename)
+					if err != nil {
+						panic(err)
+					} else if ok {
+						matched = append(matched, lexer)
+						break
+					}
+				}
+			}
+		}
+	}
+	if len(matched) > 0 {
+		sort.Sort(matched)
+		return matched[0]
+	}
+	matched = nil
+	// Next, try filename aliases.
+	for _, lexer := range Registry.Lexers {
+		config := lexer.Config()
+		for _, glob := range config.AliasFilenames {
+			ok, err := filepath.Match(glob, filename)
+			if err != nil { // nolint
+				panic(err)
+			} else if ok {
+				matched = append(matched, lexer)
+			} else {
+				for _, suf := range &ignoredSuffixes {
+					ok, err := filepath.Match(glob+suf, filename)
+					if err != nil {
+						panic(err)
+					} else if ok {
+						matched = append(matched, lexer)
+						break
+					}
+				}
+			}
+		}
+	}
+	if len(matched) > 0 {
+		sort.Sort(matched)
+		return matched[0]
+	}
+	return nil
+}
+
+// Analyse text content and return the "best" lexer..
+func Analyse(text string) chroma.Lexer {
+	var picked chroma.Lexer
+	highest := float32(0.0)
+	for _, lexer := range Registry.Lexers {
+		if analyser, ok := lexer.(chroma.Analyser); ok {
+			weight := analyser.AnalyseText(text)
+			if weight > highest {
+				picked = lexer
+				highest = weight
+			}
+		}
+	}
+	return picked
+}
+
+// Register a Lexer with the global registry.
+func Register(lexer chroma.Lexer) chroma.Lexer {
+	config := lexer.Config()
+	Registry.byName[config.Name] = lexer
+	Registry.byName[strings.ToLower(config.Name)] = lexer
+	for _, alias := range config.Aliases {
+		Registry.byAlias[alias] = lexer
+		Registry.byAlias[strings.ToLower(alias)] = lexer
+	}
+	Registry.Lexers = append(Registry.Lexers, lexer)
+	return lexer
+}
+
+// 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.MustNewLazyLexer(&chroma.Config{
+	Name:      "fallback",
+	Filenames: []string{"*"},
+}, PlaintextRules)