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Factor out common usage-help code

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This commit is contained in:
Rangi42
2025-07-27 19:20:04 -04:00
parent 16e16cdf51
commit b2747dfbd8
9 changed files with 138 additions and 179 deletions
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69
src/asm/main.cpp
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@@ -15,6 +15,7 @@
#include "extern/getopt.hpp"
#include "helpers.hpp"
#include "parser.hpp" // Generated from parser.y
#include "usage.hpp"
#include "version.hpp"
#include "asm/charmap.hpp"
@@ -83,41 +84,25 @@ static option const longopts[] = {
{nullptr, no_argument, nullptr, 0 }
};
// LCOV_EXCL_START
static void printUsage() {
fputs(
"Usage: rgbasm [-EhVvw] [-b chars] [-D name[=value]] [-g chars] [-I path]\n"
" [-M depend_file] [-MC] [-MG] [-MP] [-MT target_file] [-MQ target_file]\n"
" [-o out_file] [-P include_file] [-p pad_value] [-Q precision]\n"
" [-r depth] [-s features:state_file] [-W warning] [-X max_errors]\n"
" <file>\n"
"Useful options:\n"
" -E, --export-all export all labels\n"
" -M, --dependfile <path> set the output dependency file\n"
" -o, --output <path> set the output object file\n"
" -p, --pad-value <value> set the value to use for `ds'\n"
" -s, --state <features>:<path> set an output state file\n"
" -V, --version print RGBASM version and exit\n"
" -W, --warning <warning> enable or disable warnings\n"
"\n"
"For help, use `man rgbasm' or go to https://rgbds.gbdev.io/docs/\n",
stderr
);
}
// LCOV_EXCL_STOP
[[gnu::format(printf, 1, 2), noreturn]]
static void fatalWithUsage(char const *fmt, ...) {
va_list ap;
fputs("FATAL: ", stderr);
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
putc('\n', stderr);
printUsage();
exit(1);
}
// clang-format off: long string literal
static Usage usage(
"Usage: rgbasm [-EhVvw] [-b chars] [-D name[=value]] [-g chars] [-I path]\n"
" [-M depend_file] [-MC] [-MG] [-MP] [-MT target_file] [-MQ target_file]\n"
" [-o out_file] [-P include_file] [-p pad_value] [-Q precision]\n"
" [-r depth] [-s features:state_file] [-W warning] [-X max_errors]\n"
" <file>\n"
"Useful options:\n"
" -E, --export-all export all labels\n"
" -M, --dependfile <path> set the output dependency file\n"
" -o, --output <path> set the output object file\n"
" -p, --pad-value <value> set the value to use for `ds'\n"
" -s, --state <features>:<path> set an output state file\n"
" -V, --version print RGBASM version and exit\n"
" -W, --warning <warning> enable or disable warnings\n"
"\n"
"For help, use `man rgbasm' or go to https://rgbds.gbdev.io/docs/\n"
);
// clang-format on
// Parse a comma-separated string of '-s/--state' features
static std::vector<StateFeature> parseStateFeatures(char *str) {
@@ -218,10 +203,7 @@ int main(int argc, char *argv[]) {
break;
case 'h':
// LCOV_EXCL_START
printUsage();
exit(0);
// LCOV_EXCL_STOP
usage.printAndExit(0); // LCOV_EXCL_LINE
case 'I':
fstk_AddIncludePath(musl_optarg);
@@ -382,10 +364,7 @@ int main(int argc, char *argv[]) {
// Unrecognized options
default:
// LCOV_EXCL_START
printUsage();
exit(1);
// LCOV_EXCL_STOP
usage.printAndExit(1); // LCOV_EXCL_LINE
}
}
@@ -394,9 +373,9 @@ int main(int argc, char *argv[]) {
}
if (argc == musl_optind) {
fatalWithUsage("Please specify an input file (pass `-` to read from standard input)");
usage.printAndExit("Please specify an input file (pass `-` to read from standard input)");
} else if (argc != musl_optind + 1) {
fatalWithUsage("More than one input file specified");
usage.printAndExit("More than one input file specified");
}
std::string mainFileName = argv[musl_optind];