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date: Allow using a custom format string

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This commit adds an optional string positional argument which is used a
custom format string for the date.
This commit is contained in:
Daniel Bertalan 2022-02-25 21:40:28 +01:00 • committed by Linus Groh
parent 01dc718f07
commit 7bd68c86d3
2 changed files with 21 additions and 6 deletions
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18
Userland/Utilities/date.cpp
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@ -20,6 +20,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
bool print_rfc_3339 = false;
bool print_rfc_5322 = false;
const char* set_date = nullptr;
StringView format_string;
Core::ArgsParser args_parser;
args_parser.add_option(set_date, "Set system date and time", "set", 's', "date");
@ -27,6 +28,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
args_parser.add_option(print_iso_8601, "Print date in ISO 8601 format", "iso-8601", 'i');
args_parser.add_option(print_rfc_3339, "Print date in RFC 3339 format", "rfc-3339", 'r');
args_parser.add_option(print_rfc_5322, "Print date in RFC 5322 format", "rfc-5322", 'R');
args_parser.add_positional_argument(format_string, "Custom format to print the date in", "format-string", Core::ArgsParser::Required::No);
args_parser.parse(arguments);
if (set_date != nullptr) {
@ -43,15 +45,21 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
return 0;
}
// FIXME: this should be improved and will need to be cleaned up
// when additional output formats and formatting is supported
if (print_unix_date && print_iso_8601 && print_rfc_3339 && print_rfc_5322) {
warnln("date: multiple output formats specified");
if (print_unix_date + print_iso_8601 + print_rfc_3339 + print_rfc_5322 + !format_string.is_null() > 1) {
warnln("date: Multiple output formats specified");
return 1;
}
auto date = Core::DateTime::now();
if (print_unix_date) {
if (!format_string.is_null()) {
// FIXME: If the string argument does not start with a '+' sign, POSIX says
// we should parse that as a date, and set the system time to it.
if (format_string.length() == 0 || format_string[0] != '+') {
warnln("date: Format string must start with '+'");
return 1;
}
outln("{}", date.to_string(format_string.substring_view(1)));
} else if (print_unix_date) {
outln("{}", date.timestamp());
} else if (print_iso_8601) {
outln("{}", date.to_string("%Y-%m-%dT%H:%M:%S%:z"));