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diff: Add support for writing diffs in unified format with context

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This commit is contained in:
Shannon Booth 2023-06-27 21:00:38 +12:00 • committed by Andrew Kaster
parent 55a3dfec10
commit 2c9db2de05
1 changed files with 14 additions and 3 deletions
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17
Userland/Utilities/diff.cpp
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@ -18,11 +18,14 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
TRY(Core::System::pledge("stdio rpath"));
Core::ArgsParser parser;
bool unified = false;
StringView filename1;
StringView 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.add_option(unified, "Write diff in unified format", nullptr, 'u');
parser.parse(arguments);
auto file1 = TRY(Core::File::open(filename1, Core::File::OpenMode::Read));
@ -31,9 +34,17 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
auto const color_output = TRY(Core::System::isatty(STDOUT_FILENO)) ? Diff::ColorOutput::Yes : Diff::ColorOutput::No;
auto hunks = TRY(Diff::from_text(TRY(file1->read_until_eof()), TRY(file2->read_until_eof())));
for (auto const& hunk : hunks)
TRY(Diff::write_normal(hunk, *out, color_output));
size_t context = unified ? 3 : 0;
auto hunks = TRY(Diff::from_text(TRY(file1->read_until_eof()), TRY(file2->read_until_eof()), context));
if (unified) {
TRY(Diff::write_unified_header(filename1, filename2, *out));
for (auto const& hunk : hunks)
TRY(Diff::write_unified(hunk, *out, color_output));
} else {
for (auto const& hunk : hunks)
TRY(Diff::write_normal(hunk, *out, color_output));
}
return hunks.is_empty() ? 0 : 1;
}