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78 lines
2.8 KiB
C++
78 lines
2.8 KiB
C++
/*
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* Copyright (c) 2021, Mustafa Quraish <mustafa@serenityos.org>
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* Copyright (c) 2023, Shannon Booth <shannon.ml.booth@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibCore/ArgsParser.h>
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#include <LibCore/File.h>
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#include <LibCore/System.h>
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#include <LibDiff/Format.h>
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#include <LibDiff/Generator.h>
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#include <LibMain/Main.h>
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#include <unistd.h>
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ErrorOr<int> serenity_main(Main::Arguments arguments)
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{
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TRY(Core::System::pledge("stdio rpath"));
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Core::ArgsParser parser;
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bool unified = false;
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bool context = false;
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Optional<size_t> unified_format_context;
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Optional<size_t> context_format_context;
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StringView filename1;
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StringView filename2;
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parser.add_positional_argument(filename1, "First file to compare", "file1", Core::ArgsParser::Required::Yes);
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parser.add_positional_argument(filename2, "Second file to compare", "file2", Core::ArgsParser::Required::Yes);
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parser.add_option(unified, "Write diff in unified format", nullptr, 'u');
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parser.add_option(context, "Write diff in context format", nullptr, 'c');
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parser.add_option(unified_format_context, "Write diff in unified format with the given number of context lines", "unified", 'U', "lines");
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parser.add_option(context_format_context, "Write diff in context format with the given number of context lines", "context", 'C', "lines");
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parser.parse(arguments);
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auto file1 = TRY(Core::File::open(filename1, Core::File::OpenMode::Read));
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auto file2 = TRY(Core::File::open(filename2, Core::File::OpenMode::Read));
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auto out = TRY(Core::File::standard_output());
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auto const color_output = TRY(Core::System::isatty(STDOUT_FILENO)) ? Diff::ColorOutput::Yes : Diff::ColorOutput::No;
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size_t number_context_lines = 0;
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if (unified_format_context.has_value()) {
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number_context_lines = *unified_format_context;
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unified = true;
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} else if (context_format_context.has_value()) {
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number_context_lines = *context_format_context;
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context = true;
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} else if (context || unified) {
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// Default for these formats is 3, but 0 in normal format.
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number_context_lines = 3;
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}
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auto hunks = TRY(Diff::from_text(TRY(file1->read_until_eof()), TRY(file2->read_until_eof()), number_context_lines));
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if (hunks.is_empty())
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return 0;
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if (unified) {
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TRY(Diff::write_unified_header(filename1, filename2, *out));
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for (auto const& hunk : hunks)
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TRY(Diff::write_unified(hunk, *out, color_output));
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} else if (context) {
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TRY(Diff::write_context_header(filename1, filename2, *out));
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for (auto const& hunk : hunks)
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TRY(Diff::write_context(hunk, *out, color_output));
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} else {
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for (auto const& hunk : hunks)
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TRY(Diff::write_normal(hunk, *out, color_output));
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}
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return 1;
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}
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