Moved lexers into alphabetical sub-packages.

This was done to speed up incremental compilation when working on
lexers. That is, modifying a single lexer will no longer require
recompiling all lexers.

This is a (slightly) backwards breaking change in that lexers are no
longer exported directly in the lexers package. The registry API is
"aliased" at the old location.

formatters/html/html_test.go

@@ -23,7 +23,7 @@ func BenchmarkHTMLFormatter(b *testing.B) {
 	formatter := New()
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
-		it, err := lexers.Go.Tokenise(nil, "package main\nfunc main()\n{\nprintln(`hello world`)\n}\n")
+		it, err := lexers.Get("go").Tokenise(nil, "package main\nfunc main()\n{\nprintln(`hello world`)\n}\n")
 		assert.NoError(b, err)
 		err = formatter.Format(ioutil.Discard, styles.Fallback, it)
 		assert.NoError(b, err)

lexers/abnf.go → lexers/a/abnf.go

@@ -1,11 +1,12 @@
-package lexers
+package a
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Abnf lexer.
-var Abnf = Register(MustNewLexer(
+var Abnf = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "ABNF",
 		Aliases:   []string{"abnf"},

lexers/actionscript.go → lexers/a/actionscript.go

@@ -1,11 +1,12 @@
-package lexers
+package a
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Actionscript lexer.
-var Actionscript = Register(MustNewLexer(
+var Actionscript = internal.Register(MustNewLexer(
 	&Config{
 		Name:         "ActionScript",
 		Aliases:      []string{"as", "actionscript"},

lexers/actionscript3.go → lexers/a/actionscript3.go

@@ -1,11 +1,12 @@
-package lexers
+package a
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Actionscript 3 lexer.
-var Actionscript3 = Register(MustNewLexer(
+var Actionscript3 = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "ActionScript 3",
 		Aliases:   []string{"as3", "actionscript3"},

lexers/ada.go → lexers/a/ada.go

@@ -1,11 +1,12 @@
-package lexers
+package a
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Ada lexer.
-var Ada = Register(MustNewLexer(
+var Ada = internal.Register(MustNewLexer(
 	&Config{
 		Name:            "Ada",
 		Aliases:         []string{"ada", "ada95", "ada2005"},

lexers/angular2.go → lexers/a/angular2.go

@@ -1,11 +1,12 @@
-package lexers
+package a
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Angular2 lexer.
-var Angular2 = Register(MustNewLexer(
+var Angular2 = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "Angular2",
 		Aliases:   []string{"ng2"},

lexers/antlr.go → lexers/a/antlr.go

@@ -1,11 +1,12 @@
-package lexers
+package a
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // ANTLR lexer.
-var ANTLR = Register(MustNewLexer(
+var ANTLR = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "ANTLR",
 		Aliases:   []string{"antlr"},

lexers/apache.go → lexers/a/apache.go

@@ -1,11 +1,12 @@
-package lexers
+package a
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Apacheconf lexer.
-var Apacheconf = Register(MustNewLexer(
+var Apacheconf = internal.Register(MustNewLexer(
 	&Config{
 		Name:            "ApacheConf",
 		Aliases:         []string{"apacheconf", "aconf", "apache"},

lexers/apl.go → lexers/a/apl.go

@@ -1,11 +1,12 @@
-package lexers
+package a
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Apl lexer.
-var Apl = Register(MustNewLexer(
+var Apl = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "APL",
 		Aliases:   []string{"apl"},

lexers/applescript.go → lexers/a/applescript.go

@@ -1,11 +1,12 @@
-package lexers
+package a
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Applescript lexer.
-var Applescript = Register(MustNewLexer(
+var Applescript = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "AppleScript",
 		Aliases:   []string{"applescript"},

lexers/awk.go → lexers/a/awk.go

@@ -1,11 +1,12 @@
-package lexers
+package a
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Awk lexer.
-var Awk = Register(MustNewLexer(
+var Awk = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "Awk",
 		Aliases:   []string{"awk", "gawk", "mawk", "nawk"},

lexers/bash.go → lexers/b/bash.go

@@ -1,15 +1,16 @@
-package lexers
+package b
 
 import (
 	"regexp"
 
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 var bashAnalyserRe = regexp.MustCompile(`(?m)^#!.*/bin/(?:env |)(?:bash|zsh|sh|ksh)`)
 
 // Bash lexer.
-var Bash = Register(MustNewLexer(
+var Bash = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "Bash",
 		Aliases:   []string{"bash", "sh", "ksh", "zsh", "shell"},

lexers/batch.go → lexers/b/batch.go

@@ -1,11 +1,12 @@
-package lexers
+package b
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Batchfile lexer.
-var Batchfile = Register(MustNewLexer(
+var Batchfile = internal.Register(MustNewLexer(
 	&Config{
 		Name:            "Batchfile",
 		Aliases:         []string{"bat", "batch", "dosbatch", "winbatch"},

lexers/blitz.go → lexers/b/blitz.go

@@ -1,11 +1,12 @@
-package lexers
+package b
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Blitzbasic lexer.
-var Blitzbasic = Register(MustNewLexer(
+var Blitzbasic = internal.Register(MustNewLexer(
 	&Config{
 		Name:            "BlitzBasic",
 		Aliases:         []string{"blitzbasic", "b3d", "bplus"},

lexers/bnf.go → lexers/b/bnf.go

@@ -1,11 +1,12 @@
-package lexers
+package b
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Bnf lexer.
-var Bnf = Register(MustNewLexer(
+var Bnf = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "BNF",
 		Aliases:   []string{"bnf"},

lexers/brainfuck.go → lexers/b/brainfuck.go

@@ -1,11 +1,12 @@
-package lexers
+package b
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Brainfuck lexer.
-var Brainfuck = Register(MustNewLexer(
+var Brainfuck = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "Brainfuck",
 		Aliases:   []string{"brainfuck", "bf"},

lexers/c.go → lexers/c/c.go

@@ -1,11 +1,12 @@
-package lexers
+package c
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // C lexer.
-var C = Register(MustNewLexer(
+var C = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "C",
 		Aliases:   []string{"c"},

lexers/capnproto.go → lexers/c/capnproto.go

@@ -1,11 +1,12 @@
-package lexers
+package c
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Cap'N'Proto Proto lexer.
-var CapNProto = Register(MustNewLexer(
+var CapNProto = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "Cap'n Proto",
 		Aliases:   []string{"capnp"},

lexers/ceylon.go → lexers/c/ceylon.go

@@ -1,11 +1,12 @@
-package lexers
+package c
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Ceylon lexer.
-var Ceylon = Register(MustNewLexer(
+var Ceylon = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "Ceylon",
 		Aliases:   []string{"ceylon"},

lexers/cfengine3.go → lexers/c/cfengine3.go

@@ -1,11 +1,12 @@
-package lexers
+package c
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Cfengine3 lexer.
-var Cfengine3 = Register(MustNewLexer(
+var Cfengine3 = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "CFEngine3",
 		Aliases:   []string{"cfengine3", "cf3"},

lexers/chaiscript.go → lexers/c/chaiscript.go

@@ -1,11 +1,12 @@
-package lexers
+package c
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Chaiscript lexer.
-var Chaiscript = Register(MustNewLexer(
+var Chaiscript = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "ChaiScript",
 		Aliases:   []string{"chai", "chaiscript"},

lexers/cheetah.go → lexers/c/cheetah.go

@@ -1,11 +1,13 @@
-package lexers
+package c
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
+	. "github.com/alecthomas/chroma/lexers/p" // nolint
 )
 
 // Cheetah lexer.
-var Cheetah = Register(MustNewLexer(
+var Cheetah = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "Cheetah",
 		Aliases:   []string{"cheetah", "spitfire"},

lexers/cl.go → lexers/c/cl.go

@@ -1,11 +1,12 @@
-package lexers
+package c
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Common Lisp lexer.
-var CommonLisp = Register(MustNewLexer(
+var CommonLisp = internal.Register(MustNewLexer(
 	&Config{
 		Name:            "Common Lisp",
 		Aliases:         []string{"common-lisp", "cl", "lisp"},

lexers/clojure.go → lexers/c/clojure.go

@@ -1,11 +1,12 @@
-package lexers
+package c
 
 import (
 	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
 )
 
 // Clojure lexer.
-var Clojure = Register(MustNewLexer(
+var Clojure = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "Clojure",
 		Aliases:   []string{"clojure", "clj"},