1package lexers
 2
 3import (
 4	. "github.com/alecthomas/chroma/v2" // nolint
 5)
 6
 7// Makefile lexer.
 8var Makefile = Register(MustNewLexer(
 9	&Config{
10		Name:      "Base Makefile",
11		Aliases:   []string{"make", "makefile", "mf", "bsdmake"},
12		Filenames: []string{"*.mak", "*.mk", "Makefile", "makefile", "Makefile.*", "GNUmakefile"},
13		MimeTypes: []string{"text/x-makefile"},
14		EnsureNL:  true,
15	},
16	makefileRules,
17))
18
19func makefileRules() Rules {
20	return Rules{
21		"root": {
22			{`^(?:[\t ]+.*\n|\n)+`, Using("Bash"), nil},
23			{`\$[<@$+%?|*]`, Keyword, nil},
24			{`\s+`, Text, nil},
25			{`#.*?\n`, Comment, nil},
26			{`(export)(\s+)(?=[\w${}\t -]+\n)`, ByGroups(Keyword, Text), Push("export")},
27			{`export\s+`, Keyword, nil},
28			{`([\w${}().-]+)(\s*)([!?:+]?=)([ \t]*)((?:.*\\\n)+|.*\n)`, ByGroups(NameVariable, Text, Operator, Text, Using("Bash")), nil},
29			{`(?s)"(\\\\|\\.|[^"\\])*"`, LiteralStringDouble, nil},
30			{`(?s)'(\\\\|\\.|[^'\\])*'`, LiteralStringSingle, nil},
31			{`([^\n:]+)(:+)([ \t]*)`, ByGroups(NameFunction, Operator, Text), Push("block-header")},
32			{`\$\(`, Keyword, Push("expansion")},
33		},
34		"expansion": {
35			{`[^$a-zA-Z_()]+`, Text, nil},
36			{`[a-zA-Z_]+`, NameVariable, nil},
37			{`\$`, Keyword, nil},
38			{`\(`, Keyword, Push()},
39			{`\)`, Keyword, Pop(1)},
40		},
41		"export": {
42			{`[\w${}-]+`, NameVariable, nil},
43			{`\n`, Text, Pop(1)},
44			{`\s+`, Text, nil},
45		},
46		"block-header": {
47			{`[,|]`, Punctuation, nil},
48			{`#.*?\n`, Comment, Pop(1)},
49			{`\\\n`, Text, nil},
50			{`\$\(`, Keyword, Push("expansion")},
51			{`[a-zA-Z_]+`, Name, nil},
52			{`\n`, Text, Pop(1)},
53			{`.`, Text, nil},
54		},
55	}
56}