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diff: Add support for writing diffs in context format

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This commit is contained in:
Shannon Booth 2023-07-03 18:08:35 +12:00 • committed by Andreas Kling
parent 44f141dd24
commit 8c8b24d877
1 changed files with 8 additions and 2 deletions
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10
Userland/Utilities/diff.cpp
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@ -20,12 +20,14 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
Core::ArgsParser parser;
bool unified = false;
bool context = 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.add_option(context, "Write diff in context format", nullptr, 'c');
parser.parse(arguments);
auto file1 = TRY(Core::File::open(filename1, Core::File::OpenMode::Read));
@ -34,13 +36,17 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
auto const color_output = TRY(Core::System::isatty(STDOUT_FILENO)) ? Diff::ColorOutput::Yes : Diff::ColorOutput::No;
size_t context = unified ? 3 : 0;
auto hunks = TRY(Diff::from_text(TRY(file1->read_until_eof()), TRY(file2->read_until_eof()), context));
size_t number_context_lines = unified || context ? 3 : 0;
auto hunks = TRY(Diff::from_text(TRY(file1->read_until_eof()), TRY(file2->read_until_eof()), number_context_lines));
if (unified) {
TRY(Diff::write_unified_header(filename1, filename2, *out));
for (auto const& hunk : hunks)
TRY(Diff::write_unified(hunk, *out, color_output));
} else if (context) {
TRY(Diff::write_context_header(filename1, filename2, *out));
for (auto const& hunk : hunks)
TRY(Diff::write_context(hunk, *out, color_output));
} else {
for (auto const& hunk : hunks)
TRY(Diff::write_normal(hunk, *out, color_output));