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util: split getopt error handling into utility function

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This commit is contained in:
Jeremy Baxter 2024-06-25 17:00:02 +12:00
parent d8e267d5ba
commit 7a9866a4e2
2 changed files with 13 additions and 14 deletions
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17
util.d
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@ -1,7 +1,6 @@
module util;
import std.getopt : GetOptException;
import std.stdio : File;
import std.stdio : File;
public @safe:
@ -42,12 +41,20 @@ enforceDie(A...)(bool cond, string fmt, A a)
die(format(fmt, a));
}
string
extractFlag(in GetOptException e)
void
handleOptError(in string msg)
{
import std.algorithm : startsWith;
import std.regex : matchFirst;
return e.msg.matchFirst("-.")[0];
string opt = msg.matchFirst("-.")[0];
enforceDie(!msg.startsWith("Unrecognized option"),
"unknown option " ~ opt);
enforceDie(!msg.startsWith("Missing value for argument"),
"missing argument for option " ~ opt);
die(msg); /* catch-all */
}
string