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ArgsParser: Expand to be able to handle multiple single arguments

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This is needed for e.g. ln
This commit is contained in:
Robin Burchell 2019-05-17 15:17:43 +02:00 • committed by Andreas Kling
parent b92fa59832
commit bffed9e3cb
5 changed files with 34 additions and 21 deletions
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37
AK/ArgsParser.cpp
View file

@ -113,8 +113,15 @@ bool ArgsParser::check_required_args(const ArgsParserResult& res)
}
}
if (m_single_value_required) {
if (res.m_single_values.size() == 0)
int required_arguments = 0;
for (const auto& a : m_single_args) {
if (a.required) {
required_arguments++;
}
}
if (required_arguments != 0) {
if (res.m_single_values.size() < required_arguments)
return false;
}
@ -141,16 +148,18 @@ void ArgsParser::add_arg(const String& name, const String& value_name, const Str
m_args.set(name, Arg(name, value_name, description, false));
}
void ArgsParser::set_single_value(const String& name)
void ArgsParser::add_single_value(const String& name)
{
m_single_value_name = name;
m_single_value_required = false;
m_single_args.append(SingleArg{name, false});
}
void ArgsParser::set_required_single_value(const String& name)
void ArgsParser::add_required_single_value(const String& name)
{
m_single_value_name = name;
m_single_value_required = true;
if (m_single_args.size() != 0) {
// adding required arguments after non-required arguments would be nonsensical
ASSERT(m_single_args.last().required);
}
m_single_args.append(SingleArg{name, true});
}
String ArgsParser::get_usage() const
@ -181,18 +190,18 @@ String ArgsParser::get_usage() const
sb.append("] ");
}
if (m_single_value_name.length()) {
if (m_single_value_required)
for (auto& arg : m_single_args) {
if (arg.required)
sb.append("<");
else
sb.append("[");
sb.append(m_single_value_name);
sb.append(arg.name);
if (m_single_value_required)
sb.append(">");
if (arg.required)
sb.append("> ");
else
sb.append("]");
sb.append("] ");
}
sb.append("\n");

12
AK/ArgsParser.h
View file

@ -38,8 +38,8 @@ public:
void add_required_arg(const String& name, const String& value_name, const String& description);
void add_arg(const String& name, const String& description);
void add_arg(const String& name, const String& value_name, const String& description);
void set_single_value(const String& name);
void set_required_single_value(const String& name);
void add_single_value(const String& name);
void add_required_single_value(const String& name);
String get_usage() const;
void print_usage() const;
@ -61,8 +61,12 @@ private:
String m_program_name;
String m_prefix;
String m_single_value_name;
bool m_single_value_required = false;
struct SingleArg {
String name;
bool required;
};
Vector<SingleArg> m_single_args;
HashMap<String, Arg> m_args;
};

2
Userland/pape.cpp
View file

@ -56,7 +56,7 @@ int main(int argc, char** argv)
args_parser.add_arg("a", "show all wallpapers");
args_parser.add_arg("c", "show current wallpaper");
args_parser.set_single_value("name");
args_parser.add_single_value("name");
AK::ArgsParserResult args = args_parser.parse(argc, (const char**)argv);

2
Userland/sysctl.cpp
View file

@ -107,7 +107,7 @@ int main(int argc, char** argv)
AK::ArgsParser args_parser("sysctl");
args_parser.add_arg("a", "show all variables");
args_parser.set_single_value("variable=[value]");
args_parser.add_single_value("variable=[value]");
AK::ArgsParserResult args = args_parser.parse(argc, (const char**)argv);

2
Userland/tail.cpp
View file

@ -79,7 +79,7 @@ int main(int argc, char *argv[])
args_parser.add_arg("f", "follow -- appended data is output as it is written to the file");
args_parser.add_arg("n", "lines", "fetch the specified number of lines");
args_parser.set_required_single_value("file");
args_parser.add_required_single_value("file");
AK::ArgsParserResult args = args_parser.parse(argc, (const char**)argv);