[all-commits] [llvm/llvm-project] de8ee0: [CommandLine] Better report unknown subcommands (#...

[Igor Kudrin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: de8ee03ed916feb37b602b93c07f0dade8fd0050
      https://github.com/llvm/llvm-project/commit/de8ee03ed916feb37b602b93c07f0dade8fd0050
  Author: Igor Kudrin <ikudrin at accesssoftek.com>
  Date:   2023-12-14 (Thu, 14 Dec 2023)

  Changed paths:
    M llvm/lib/Support/CommandLine.cpp
    M llvm/unittests/Support/CommandLineTest.cpp

  Log Message:
  -----------
  [CommandLine] Better report unknown subcommands (#74811)

The patch improves the reporting for the first option in the command
line when it looks like a subcommand name but does not match any
defined.

Before the patch:
```
> prog baz
prog: Unknown command line argument 'baz'.  Try: 'prog --help'
```

With the patch:
```
> prog baz
prog: Unknown subcommand 'baz'.  Try: 'prog --help'
prog: Did you mean 'bar'?
```