1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/*
* Copyright (c) 2020, Emanuel Sprung <emanuel.sprung@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Assertions.h>
#include <AK/ByteBuffer.h>
#include <AK/ScopeGuard.h>
#include <AK/String.h>
#include <AK/Utf8View.h>
#include <AK/Vector.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/DirIterator.h>
#include <LibCore/File.h>
#include <LibRegex/Regex.h>
#include <stdio.h>
#include <unistd.h>
enum class BinaryFileMode {
Binary,
Text,
Skip,
};
template<typename... Ts>
void fail(StringView format, Ts... args)
{
warn("\x1b[31m");
warnln(format, forward<Ts>(args)...);
warn("\x1b[0m");
abort();
}
int main(int argc, char** argv)
{
if (pledge("stdio rpath", nullptr) < 0) {
perror("pledge");
return 1;
}
Vector<const char*> files;
bool recursive { false };
bool use_ere { false };
const char* pattern = nullptr;
BinaryFileMode binary_mode { BinaryFileMode::Binary };
bool case_insensitive = false;
bool invert_match = false;
bool colored_output = isatty(STDOUT_FILENO);
Core::ArgsParser args_parser;
args_parser.add_option(recursive, "Recursively scan files starting in working directory", "recursive", 'r');
args_parser.add_option(use_ere, "Extended regular expressions", "extended-regexp", 'E');
args_parser.add_option(pattern, "Pattern", "regexp", 'e', "Pattern");
args_parser.add_option(case_insensitive, "Make matches case-insensitive", nullptr, 'i');
args_parser.add_option(invert_match, "Select non-matching lines", "invert-match", 'v');
args_parser.add_option(Core::ArgsParser::Option {
.requires_argument = true,
.help_string = "Action to take for binary files ([binary], text, skip)",
.long_name = "binary-mode",
.accept_value = [&](auto* str) {
if ("text"sv == str)
binary_mode = BinaryFileMode::Text;
else if ("binary"sv == str)
binary_mode = BinaryFileMode::Binary;
else if ("skip"sv == str)
binary_mode = BinaryFileMode::Skip;
else
return false;
return true;
},
});
args_parser.add_option(Core::ArgsParser::Option {
.requires_argument = false,
.help_string = "Treat binary files as text (same as --binary-mode text)",
.long_name = "text",
.short_name = 'a',
.accept_value = [&](auto) {
binary_mode = BinaryFileMode::Text;
return true;
},
});
args_parser.add_option(Core::ArgsParser::Option {
.requires_argument = false,
.help_string = "Ignore binary files (same as --binary-mode skip)",
.long_name = nullptr,
.short_name = 'I',
.accept_value = [&](auto) {
binary_mode = BinaryFileMode::Skip;
return true;
},
});
args_parser.add_option(Core::ArgsParser::Option {
.requires_argument = true,
.help_string = "When to use colored output for the matching text ([auto], never, always)",
.long_name = "color",
.short_name = 0,
.value_name = "WHEN",
.accept_value = [&](auto* str) {
if ("never"sv == str)
colored_output = false;
else if ("always"sv == str)
colored_output = true;
else if ("auto"sv != str)
return false;
return true;
},
});
args_parser.add_positional_argument(files, "File(s) to process", "file", Core::ArgsParser::Required::No);
args_parser.parse(argc, argv);
// mock grep behaviour: if -e is omitted, use first positional argument as pattern
if (pattern == nullptr && files.size())
pattern = files.take_first();
PosixOptions options {};
if (case_insensitive)
options |= PosixFlags::Insensitive;
auto grep_logic = [&](auto&& re) {
if (re.parser_result.error != Error::NoError) {
return 1;
}
auto matches = [&](StringView str, StringView filename = "", bool print_filename = false, bool is_binary = false) {
size_t last_printed_char_pos { 0 };
if (is_binary && binary_mode == BinaryFileMode::Skip)
return false;
auto result = re.match(str, PosixFlags::Global);
if (result.success ^ invert_match) {
if (is_binary && binary_mode == BinaryFileMode::Binary) {
outln(colored_output ? "binary file \x1B[34m{}\x1B[0m matches" : "binary file {} matches", filename);
} else {
if ((result.matches.size() || invert_match) && print_filename)
out(colored_output ? "\x1B[34m{}:\x1B[0m" : "{}:", filename);
for (auto& match : result.matches) {
out(colored_output ? "{}\x1B[32m{}\x1B[0m" : "{}{}",
StringView(&str[last_printed_char_pos], match.global_offset - last_printed_char_pos),
match.view.to_string());
last_printed_char_pos = match.global_offset + match.view.length();
}
outln("{}", StringView(&str[last_printed_char_pos], str.length() - last_printed_char_pos));
}
return true;
}
return false;
};
auto handle_file = [&matches, binary_mode](StringView filename, bool print_filename) -> bool {
auto file = Core::File::construct(filename);
if (!file->open(Core::OpenMode::ReadOnly)) {
warnln("Failed to open {}: {}", filename, file->error_string());
return false;
}
while (file->can_read_line()) {
auto line = file->read_line();
auto is_binary = memchr(line.characters(), 0, line.length()) != nullptr;
if (matches(line, filename, print_filename, is_binary) && is_binary && binary_mode == BinaryFileMode::Binary)
return true;
}
return true;
};
auto add_directory = [&handle_file](String base, Optional<String> recursive, auto handle_directory) -> void {
Core::DirIterator it(recursive.value_or(base), Core::DirIterator::Flags::SkipDots);
while (it.has_next()) {
auto path = it.next_full_path();
if (!Core::File::is_directory(path)) {
auto key = path.substring_view(base.length() + 1, path.length() - base.length() - 1);
handle_file(key, true);
} else {
handle_directory(base, path, handle_directory);
}
}
};
bool did_match_something = false;
if (!files.size() && !recursive) {
char* line = nullptr;
size_t line_len = 0;
ssize_t nread = 0;
ScopeGuard free_line = [line] { free(line); };
while ((nread = getline(&line, &line_len, stdin)) != -1) {
VERIFY(nread > 0);
if (line[nread - 1] == '\n')
--nread;
StringView line_view(line, nread);
bool is_binary = line_view.contains(0);
if (is_binary && binary_mode == BinaryFileMode::Skip)
return 1;
auto matched = matches(line_view, "stdin", false, is_binary);
did_match_something = did_match_something || matched;
if (matched && is_binary && binary_mode == BinaryFileMode::Binary)
return 0;
}
} else {
if (recursive) {
add_directory(".", {}, add_directory);
} else {
bool print_filename { files.size() > 1 };
for (auto& filename : files) {
if (!handle_file(filename, print_filename))
return 1;
}
}
}
return did_match_something ? 0 : 1;
};
if (use_ere)
return grep_logic(Regex<PosixExtended>(pattern, options));
return grep_logic(Regex<PosixBasic>(pattern, options));
}
|
