RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 18:07:34 +00:00
Code Issues Activity Actions

Shell: Add support for the '!' POSIX pipeline prefix

Browse source 
This prefix simply inverts the exit code of the pipeline, which we
implement using the 'not' builtin.
This commit is contained in:
Ali Mohammad Pur 2023-07-31 16:19:39 +03:30 • committed by Ali Mohammad Pur
parent b6d7c5fb0e
commit da7bf5f785
2 changed files with 26 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

27
Userland/Shell/PosixParser.cpp
View file

@ -769,15 +769,38 @@ ErrorOr<RefPtr<AST::Node>> Parser::parse_and_or()
ErrorOr<RefPtr<AST::Node>> Parser::parse_pipeline()
{
return parse_pipe_sequence();
while (peek().type == Token::Type::Newline)
skip();
auto is_negated = false;
if (peek().type == Token::Type::Bang) {
is_negated = true;
skip();
}
return parse_pipe_sequence(is_negated);
}
ErrorOr<RefPtr<AST::Node>> Parser::parse_pipe_sequence()
ErrorOr<RefPtr<AST::Node>> Parser::parse_pipe_sequence(bool is_negated)
{
auto node = TRY(parse_command());
if (!node)
return RefPtr<AST::Node> {};
if (is_negated) {
if (is<AST::CastToCommand>(node.ptr())) {
node = make_ref_counted<AST::CastToCommand>(
node->position(),
make_ref_counted<AST::ListConcatenate>(
node->position(),
Vector<NonnullRefPtr<AST::Node>> {
make_ref_counted<AST::BarewordLiteral>(
node->position(),
"not"_short_string),
*static_cast<AST::CastToCommand&>(*node).inner() }));
}
}
for (;;) {
if (peek().type != Token::Type::Pipe)
break;