[llvm] r309113 - [Bash-autocompletion] Show HelpText with possible flags

[Hans Wennborg via llvm-commits]

Merged to 5.0 in r309437.

On Wed, Jul 26, 2017 at 6:36 AM, Yuka Takahashi via llvm-commits
<llvm-commits at lists.llvm.org> wrote:
> Author: yamaguchi
> Date: Wed Jul 26 06:36:58 2017
> New Revision: 309113
>
> URL: http://llvm.org/viewvc/llvm-project?rev=309113&view=rev
> Log:
> [Bash-autocompletion] Show HelpText with possible flags
>
> Summary:
> `clang --autocomplete=-std` will show
> ```
> -std:   Language standard to compile for
> -std=   Language standard to compile for
> -stdlib=        C++ standard library to use
> ```
> after this change.
>
> However, showing HelpText with completion in bash seems super tricky, so
> this feature will be used in other shells (fish, zsh...).
>
> Reviewers: v.g.vassilev, teemperor, ruiu
>
> Subscribers: cfe-commits, hiraditya
>
> Differential Revision: https://reviews.llvm.org/D35759
>
> Modified:
>     llvm/trunk/lib/Option/OptTable.cpp
>
> Modified: llvm/trunk/lib/Option/OptTable.cpp
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Option/OptTable.cpp?rev=309113&r1=309112&r2=309113&view=diff
> ==============================================================================
> --- llvm/trunk/lib/Option/OptTable.cpp (original)
> +++ llvm/trunk/lib/Option/OptTable.cpp Wed Jul 26 06:36:58 2017
> @@ -235,7 +235,9 @@ OptTable::findByPrefix(StringRef Cur, un
>        continue;
>
>      for (int I = 0; In.Prefixes[I]; I++) {
> -      std::string S = std::string(In.Prefixes[I]) + std::string(In.Name);
> +      std::string S = std::string(In.Prefixes[I]) + std::string(In.Name) + "\t";
> +      if (In.HelpText)
> +        S += In.HelpText;
>        if (StringRef(S).startswith(Cur))
>          Ret.push_back(S);
>      }
>
>
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