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Shell: Add the alias builtin and resolve aliases

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This follows the other shells in alias resolution, and resolves the
alias only once.
This commit is contained in:
AnotherTest 2020-06-17 18:51:44 +04:30 • committed by Andreas Kling
parent a4627f2439
commit 2915dcfcc3
4 changed files with 66 additions and 1 deletions
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34
Shell/Builtin.cpp
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@ -33,6 +33,40 @@
extern RefPtr<Line::Editor> editor;
int Shell::builtin_alias(int argc, const char** argv)
{
Vector<const char*> arguments;
Core::ArgsParser parser;
parser.add_positional_argument(arguments, "List of name[=values]'s", "name[=value]", Core::ArgsParser::Required::No);
if (!parser.parse(argc, const_cast<char**>(argv), false))
return 1;
if (arguments.is_empty()) {
for (auto& alias : m_aliases)
printf("%s=%s\n", escape_token(alias.key).characters(), escape_token(alias.value).characters());
return 0;
}
bool fail = false;
for (auto& argument : arguments) {
auto parts = String { argument }.split_limit('=', 2, true);
if (parts.size() == 1) {
auto alias = m_aliases.get(parts[0]);
if (alias.has_value()) {
printf("%s=%s\n", escape_token(parts[0]).characters(), escape_token(alias.value()).characters());
} else {
fail = true;
}
} else {
m_aliases.set(parts[0], parts[1]);
}
}
return fail ? 1 : 0;
}
int Shell::builtin_bg(int argc, const char** argv)
{
int job_id = -1;