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Utilities: Add a basic diff utility

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This commit is contained in:
Mustafa Quraish 2021-09-15 22:28:04 -04:00 • committed by Brian Gianforcaro
parent 5e28da1aa4
commit f552c26c79
2 changed files with 53 additions and 1 deletions
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51
Userland/Utilities/diff.cpp Normal file
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/*
* Copyright (c) 2021, Mustafa Quraish <mustafa@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <LibDiff/Generator.h>
#include <unistd.h>
int main(int argc, char** argv)
{
if (pledge("stdio rpath", nullptr) < 0) {
perror("pledge");
return 1;
}
Core::ArgsParser parser;
char const* filename1;
char const* filename2;
parser.add_positional_argument(filename1, "First file to compare", "file1", Core::ArgsParser::Required::Yes);
parser.add_positional_argument(filename2, "Second file to compare", "file2", Core::ArgsParser::Required::Yes);
parser.parse(argc, argv, Core::ArgsParser::FailureBehavior::PrintUsageAndExit);
auto file1 = Core::File::construct(filename1);
if (!file1->open(Core::OpenMode::ReadOnly)) {
warnln("Error: Cannot open {}: {}", filename1, file1->error_string());
return 1;
}
auto file2 = Core::File::construct(filename2);
if (!file2->open(Core::OpenMode::ReadOnly)) {
warnln("Error: Cannot open {}: {}", filename2, file2->error_string());
return 1;
}
auto hunks = Diff::from_text(file1->read_all(), file2->read_all());
for (const auto& hunk : hunks) {
outln("Hunk: {}, {}", hunk.original_start_line, hunk.target_start_line);
for (const auto& line : hunk.removed_lines) {
outln("\033[31;1m< {}\033[0m", line);
}
if (hunk.added_lines.size() > 0 && hunk.removed_lines.size() > 0)
outln("---");
for (const auto& line : hunk.added_lines)
outln("\033[32;1m> {}\033[0m", line);
}
return hunks.is_empty() ? 0 : 1;
}