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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 <LibCore/System.h>
#include <LibDiff/Generator.h>
#include <LibMain/Main.h>
#include <unistd.h>
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
TRY(Core::System::pledge("stdio rpath"));
Core::ArgsParser parser;
String filename1;
String 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(arguments);
auto file1 = TRY(Core::File::open(filename1, Core::OpenMode::ReadOnly));
auto file2 = TRY(Core::File::open(filename2, Core::OpenMode::ReadOnly));
auto hunks = Diff::from_text(file1->read_all(), file2->read_all());
for (auto const& hunk : hunks) {
auto original_start = hunk.original_start_line;
auto target_start = hunk.target_start_line;
auto num_added = hunk.added_lines.size();
auto num_removed = hunk.removed_lines.size();
StringBuilder sb;
// Source line(s)
sb.appendff("{}", original_start);
if (num_removed > 1)
sb.appendff(",{}", original_start + num_removed - 1);
// Action
if (num_added > 0 && num_removed > 0)
sb.append('c');
else if (num_added > 0)
sb.append('a');
else
sb.append('d');
// Target line(s)
sb.appendff("{}", target_start);
if (num_added > 1)
sb.appendff(",{}", target_start + num_added - 1);
bool color_output = isatty(STDOUT_FILENO);
outln("Hunk: {}", sb.build());
for (auto const& line : hunk.removed_lines) {
if (color_output)
outln("\033[31;1m< {}\033[0m", line);
else
outln("< {}", line);
}
if (num_added > 0 && num_removed > 0)
outln("---");
for (auto const& line : hunk.added_lines) {
if (color_output)
outln("\033[32;1m> {}\033[0m", line);
else
outln("> {}", line);
}
}
return hunks.is_empty() ? 0 : 1;
}
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