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

> On 27 Nov 2017, at 19:36, Eric Sunshine <sunshine@sunshineco.com> wrote:
> 
> On Mon, Nov 27, 2017 at 8:47 AM,  <lars.schneider@autodesk.com> 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@pobox.com>
>> Signed-off-by: Lars Schneider <larsxschneider@gmail.com>
>> ---
>> 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");
>> +               }