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* Help text for all (non-script) programs, so no more:

Browse source 
$ nix-instantiate --help
error: unknown flag `--help`
Try `nix-instantiate --help' for more information.

:-)
This commit is contained in:
Eelco Dolstra 2003-12-01 15:55:05 +00:00
parent 905d5b91fa
commit 078e20885e
14 changed files with 126 additions and 32 deletions
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39
src/libmain/shared.cc
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@ -23,31 +23,42 @@ static void initAndRun(int argc, char * * argv)
nixDBPath = (string) NIX_STATE_DIR + "/db";
/* Put the arguments in a vector. */
Strings args;
Strings args, remaining;
while (argc--) args.push_back(*argv++);
args.erase(args.begin());
/* Expand compound dash options (i.e., `-qlf' -> `-q -l -f'), and
ignore options for the ATerm library. */
for (Strings::iterator it = args.begin();
it != args.end(); )
{
string arg = *it;
if (string(arg, 0, 4) == "-at-")
it = args.erase(it);
for (Strings::iterator i = args.begin(); i != args.end(); ++i) {
string arg = *i;
if (string(arg, 0, 4) == "-at-") ;
else if (arg.length() > 2 && arg[0] == '-' && arg[1] != '-') {
for (unsigned int i = 1; i < arg.length(); i++)
if (isalpha(arg[i]))
args.insert(it, (string) "-" + arg[i]);
for (unsigned int j = 1; j < arg.length(); j++)
if (isalpha(arg[j]))
remaining.push_back((string) "-" + arg[j]);
else {
args.insert(it, string(arg, i));
remaining.push_back(string(arg, j));
break;
}
it = args.erase(it);
} else it++;
} else remaining.push_back(arg);
}
args = remaining;
remaining.clear();
/* Process default options. */
for (Strings::iterator i = args.begin(); i != args.end(); ++i) {
string arg = *i;
if (arg == "--verbose" || arg == "-v")
verbosity = (Verbosity) ((int) verbosity + 1);
else if (arg == "--help") {
printHelp();
return;
} else if (arg == "--keep-failed" || arg == "-K")
keepFailed = true;
else remaining.push_back(arg);
}
run(args);
run(remaining);
}