Re: [PATCH v3] launch_editor(): indicate that Git waits for user input

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On Mon, Nov 27, 2017 at 8:47 AM,  <lars.schneider@xxxxxxxxxxxx> wrote:
> When a graphical GIT_EDITOR is spawned by a Git command that opens
> and waits for user input (e.g. "git rebase -i"), then the editor window
> might be obscured by other windows. The user may be left staring at the
> original Git terminal window without even realizing that s/he needs to
> interact with another window before Git can proceed. To this user Git
> appears hanging.
>
> Show a message in the original terminal and get rid of it when the
> editor returns.
>
> Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
> Signed-off-by: Lars Schneider <larsxschneider@xxxxxxxxx>
> ---
> diff --git a/editor.c b/editor.c
> @@ -40,6 +40,35 @@ int launch_editor(const char *path, struct strbuf *buffer, const char *const *en
> +               static const char *close_notice = NULL;
> +
> +               if (isatty(2) && !close_notice) {
> +                       char *term = getenv("TERM");
> +
> +                       if (term && strcmp(term, "dumb"))
> +                               /*
> +                                * go back to the beginning and erase the
> +                                * entire line if the terminal is capable
> +                                * to do so, to avoid wasting the vertical
> +                                * space.
> +                                */
> +                               close_notice = "\r\033[K";
> +                       else if (term && strstr(term, "emacsclient"))

You need to check 'editor' here, not 'term', and you should do it
before the "not dumb" terminal check, otherwise you'll never get this
far.

> +                               /*
> +                                * `emacsclient` (or `emacsclientw` on Windows) already prints
> +                                * ("Waiting for Emacs...") if a file is opened for editing.
> +                                * Therefore, we don't need to print the editor launch info.
> +                                */
> +                               ;
> +                       else
> +                               /* otherwise, complete and waste the line */
> +                               close_notice = _("done.\n");
> +               }



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