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Diffstat (limited to '2020/subtitles/emacsconf-2020--30-a-tour-of-vterm--gabriele-bozzola-sbozzolo-autogen.vtt')
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diff --git a/2020/subtitles/emacsconf-2020--30-a-tour-of-vterm--gabriele-bozzola-sbozzolo-autogen.vtt b/2020/subtitles/emacsconf-2020--30-a-tour-of-vterm--gabriele-bozzola-sbozzolo-autogen.vtt deleted file mode 100644 index 49db0989..00000000 --- a/2020/subtitles/emacsconf-2020--30-a-tour-of-vterm--gabriele-bozzola-sbozzolo-autogen.vtt +++ /dev/null @@ -1,634 +0,0 @@ -WEBVTT - -00:00:00.880 --> 00:00:03.760 -hello and welcome to the stock - -00:00:03.760 --> 00:00:06.080 -the title of the stock is a tour feature - -00:00:06.080 --> 00:00:07.919 -a fast and fully featured terminal - -00:00:07.919 --> 00:00:08.559 -emulator - -00:00:08.559 --> 00:00:11.840 -inside new e-max so let's try to - -00:00:11.840 --> 00:00:13.360 -understand what we mean with the pass - -00:00:13.360 --> 00:00:14.559 -and fully featured - -00:00:14.559 --> 00:00:17.520 -and to do that we'll compare v term with - -00:00:17.520 --> 00:00:18.320 -the - -00:00:18.320 --> 00:00:20.640 -packages which are built in Emacs mean - -00:00:20.640 --> 00:00:22.400 -the term - -00:00:22.400 --> 00:00:25.199 -so let's let's jump into the v term so - -00:00:25.199 --> 00:00:26.720 -this is a feature buffer - -00:00:26.720 --> 00:00:29.679 -and this is a ansi term buffer what I'm - -00:00:29.679 --> 00:00:31.519 -going to do now is first I'm going to - -00:00:31.519 --> 00:00:32.160 -prove you - -00:00:32.160 --> 00:00:35.760 -what we move fast so to do that let me - -00:00:35.760 --> 00:00:37.520 -open a large file display on screen or - -00:00:37.520 --> 00:00:39.280 -large file this is about one megabyte of - -00:00:39.280 --> 00:00:40.239 -data - -00:00:40.239 --> 00:00:43.520 -and let me time that it takes about 0.6 - -00:00:43.520 --> 00:00:44.160 -seconds - -00:00:44.160 --> 00:00:47.200 -with feature let's do the same with - -00:00:47.200 --> 00:00:49.760 -with ancient term well we already - -00:00:49.760 --> 00:00:51.520 -already see the difference - -00:00:51.520 --> 00:00:53.039 -so I will use this time to tell you - -00:00:53.039 --> 00:00:54.559 -what's different and - -00:00:54.559 --> 00:00:57.360 -what is v term exactly so v term is a - -00:00:57.360 --> 00:00:58.879 -terminal emulator built - -00:00:58.879 --> 00:01:01.120 -on top of an external library the - -00:01:01.120 --> 00:01:02.719 -library is called libvi term - -00:01:02.719 --> 00:01:05.519 -and is the same library used by newton - -00:01:05.519 --> 00:01:07.200 -for their own terminal emulator - -00:01:07.200 --> 00:01:10.000 -it's a c library and this is what gives - -00:01:10.000 --> 00:01:10.799 -us - -00:01:10.799 --> 00:01:15.119 -a lot of good features first the speed - -00:01:15.119 --> 00:01:17.280 -time spent here 0.6 is essentially the - -00:01:17.280 --> 00:01:18.479 -time that it takes to - -00:01:18.479 --> 00:01:21.520 -one convert the emax representation of - -00:01:21.520 --> 00:01:22.240 -like text - -00:01:22.240 --> 00:01:23.840 -into the visa and representation of what - -00:01:23.840 --> 00:01:26.400 -was a string and two into - -00:01:26.400 --> 00:01:28.479 -actually displaying that and that can - -00:01:28.479 --> 00:01:29.520 -take time - -00:01:29.520 --> 00:01:31.840 -if there's a if there's quantification - -00:01:31.840 --> 00:01:33.680 -involved so these are the 0.6 seconds - -00:01:33.680 --> 00:01:34.240 -there - -00:01:34.240 --> 00:01:36.960 -as we say in the in ancestor that's much - -00:01:36.960 --> 00:01:37.920 -much - -00:01:37.920 --> 00:01:39.920 -more time it's much slower so the - -00:01:39.920 --> 00:01:41.680 -terminal will feel much snappier much - -00:01:41.680 --> 00:01:42.880 -faster - -00:01:42.880 --> 00:01:46.079 -but that's not the main benefit or the - -00:01:46.079 --> 00:01:47.840 -only benefit of using this external - -00:01:47.840 --> 00:01:48.799 -library - -00:01:48.799 --> 00:01:52.320 -feature the second big benefit - -00:01:52.320 --> 00:01:55.439 -is that v term has support for all the - -00:01:55.439 --> 00:01:56.560 -escape codes - -00:01:56.560 --> 00:01:59.200 -that exterm has support for so v term is - -00:01:59.200 --> 00:02:01.119 -essentially as running x term - -00:02:01.119 --> 00:02:03.600 -inside an imax buffer so let's see that - -00:02:03.600 --> 00:02:04.799 -this for example - -00:02:04.799 --> 00:02:07.119 -let's start by looking at the support - -00:02:07.119 --> 00:02:08.239 -for colors - -00:02:08.239 --> 00:02:09.920 -we have support for all the colors out - -00:02:09.920 --> 00:02:11.840 -of the box we don't have to do anything - -00:02:11.840 --> 00:02:15.040 -and if we did the same here well we have - -00:02:15.040 --> 00:02:15.680 -only - -00:02:15.680 --> 00:02:17.920 -20 colors there's a way to get all the - -00:02:17.920 --> 00:02:19.680 -colors but it's much more involved - -00:02:19.680 --> 00:02:23.040 -but this is not where v term shines - -00:02:23.040 --> 00:02:26.000 -uh we can run all the commands that we - -00:02:26.000 --> 00:02:27.200 -want - -00:02:27.200 --> 00:02:30.480 -h top and cdu - -00:02:30.480 --> 00:02:33.040 -everything runs here also this title - -00:02:33.040 --> 00:02:33.840 -it's a - -00:02:33.840 --> 00:02:36.400 -it's a fairly complicated manipulation - -00:02:36.400 --> 00:02:37.040 -of - -00:02:37.040 --> 00:02:40.879 -the window and it will not work here - -00:02:40.879 --> 00:02:42.319 -it just doesn't work actually now the - -00:02:42.319 --> 00:02:44.640 -terminal is probably messed up - -00:02:44.640 --> 00:02:48.400 -yes so using this external library - -00:02:48.400 --> 00:02:50.959 -removes the burden from the developers - -00:02:50.959 --> 00:02:52.000 -of having to implement - -00:02:52.000 --> 00:02:54.000 -support for all these cape codes we just - -00:02:54.000 --> 00:02:55.360 -use those - -00:02:55.360 --> 00:02:58.480 -so in many ways running veteran - -00:02:58.480 --> 00:03:01.760 -is us running extern inside a max - -00:03:01.760 --> 00:03:04.400 -but it's better than that because since - -00:03:04.400 --> 00:03:05.840 -this is an e-max buffer - -00:03:05.840 --> 00:03:08.879 -we can enjoy a lot of features from - -00:03:08.879 --> 00:03:09.760 -Emacs - -00:03:09.760 --> 00:03:11.920 -as well as a tighter integration with - -00:03:11.920 --> 00:03:13.200 -e-max itself - -00:03:13.200 --> 00:03:16.560 -for example as you see here the title of - -00:03:16.560 --> 00:03:17.599 -my buffer - -00:03:17.599 --> 00:03:20.720 -is from the director I'm in so let's go - -00:03:20.720 --> 00:03:21.760 -to my tmp - -00:03:21.760 --> 00:03:24.799 -the title will change so there's - -00:03:24.799 --> 00:03:26.560 -information being exchanged between v - -00:03:26.560 --> 00:03:28.000 -term and index - -00:03:28.000 --> 00:03:29.760 -and of course the title is not the only - -00:03:29.760 --> 00:03:32.000 -place where information is exchanged - -00:03:32.000 --> 00:03:34.799 -I can find a file and I will be in the - -00:03:34.799 --> 00:03:35.920 -directory - -00:03:35.920 --> 00:03:38.239 -where my terminal is this feature is - -00:03:38.239 --> 00:03:40.000 -also available in nc term - -00:03:40.000 --> 00:03:41.680 -and it works also on b term and it - -00:03:41.680 --> 00:03:43.840 -follows me so if I go to tmp I'll get - -00:03:43.840 --> 00:03:44.720 -the tmp - -00:03:44.720 --> 00:03:48.000 -if I ssh to a remote server it will work - -00:03:48.000 --> 00:03:48.640 -also - -00:03:48.640 --> 00:03:51.120 -on remote servers as well which is a - -00:03:51.120 --> 00:03:53.920 -very nice way to edit files remotely - -00:03:53.920 --> 00:03:55.760 -while we're working on a shelf and - -00:03:55.760 --> 00:03:57.360 -second while vterm - -00:03:57.360 --> 00:03:59.599 -is not an e-lisp interpreter like - -00:03:59.599 --> 00:04:02.159 -initial what we can do is we can - -00:04:02.159 --> 00:04:06.080 -still run inbox functions so for example - -00:04:06.080 --> 00:04:08.319 -that requires some configuration the - -00:04:08.319 --> 00:04:10.159 -term - -00:04:10.159 --> 00:04:12.480 -command message I as you see there's a - -00:04:12.480 --> 00:04:14.000 -higher so what I'm doing - -00:04:14.000 --> 00:04:16.239 -is I'm executing the eagles function I - -00:04:16.239 --> 00:04:17.199 -and I can drop that - -00:04:17.199 --> 00:04:19.840 -and turn it around uh hash function to - -00:04:19.840 --> 00:04:20.320 -run - -00:04:20.320 --> 00:04:24.880 -a-list functions or another one file see - -00:04:24.880 --> 00:04:27.600 -we call this feature message passing and - -00:04:27.600 --> 00:04:28.800 -it requires - -00:04:28.800 --> 00:04:30.880 -some configuration on the emac side as - -00:04:30.880 --> 00:04:32.000 -well as in the shell side - -00:04:32.000 --> 00:04:34.000 -it's important to stress what's the - -00:04:34.000 --> 00:04:35.360 -nature of feature - -00:04:35.360 --> 00:04:37.360 -for instance every time I'm sending a - -00:04:37.360 --> 00:04:39.120 -key binding it's not immediately clear - -00:04:39.120 --> 00:04:40.800 -if my intention is to send it to the - -00:04:40.800 --> 00:04:42.720 -shell or to imax so v term implements - -00:04:42.720 --> 00:04:44.320 -some reasonable defaults - -00:04:44.320 --> 00:04:46.800 -but at the moment it's mainly packaged - -00:04:46.800 --> 00:04:49.120 -to display characters on a screen - -00:04:49.120 --> 00:04:51.199 -so for example if you're using evil the - -00:04:51.199 --> 00:04:53.600 -editing commands in evil will not work - -00:04:53.600 --> 00:04:55.759 -immediately there's some work to be done - -00:04:55.759 --> 00:04:57.840 -and integration can be improved on that - -00:04:57.840 --> 00:04:58.479 -side but - -00:04:58.479 --> 00:05:00.240 -sometimes we really want this to behave - -00:05:00.240 --> 00:05:02.240 -exactly like a imax buffer - -00:05:02.240 --> 00:05:05.440 -we want to be able to search if - -00:05:05.440 --> 00:05:07.039 -if I try to get it to search it will not - -00:05:07.039 --> 00:05:08.880 -work I will send it to the shop so to do - -00:05:08.880 --> 00:05:09.360 -that - -00:05:09.360 --> 00:05:12.400 -we enabled the term copy mode so as you - -00:05:12.400 --> 00:05:12.800 -see - -00:05:12.800 --> 00:05:15.280 -copy mode and now this buffer is - -00:05:15.280 --> 00:05:17.039 -essentially a fundamental buffer - -00:05:17.039 --> 00:05:21.120 -I can move around as I can search - -00:05:21.120 --> 00:05:24.400 -uh so it must have I - -00:05:24.400 --> 00:05:25.840 -can do everything I want and there are - -00:05:25.840 --> 00:05:27.120 -additional features for example I can - -00:05:27.120 --> 00:05:29.600 -jump around - -00:05:29.600 --> 00:05:31.440 -all the prompts and I find this - -00:05:31.440 --> 00:05:32.639 -extremely useful - -00:05:32.639 --> 00:05:34.400 -because I can copy update from my - -00:05:34.400 --> 00:05:35.919 -programs or - -00:05:35.919 --> 00:05:39.199 -what I always have to do is I have to - -00:05:39.199 --> 00:05:42.400 -google some errors so what I do is I - -00:05:42.400 --> 00:05:43.120 -select that - -00:05:43.120 --> 00:05:45.919 -and I have my keybinding in maksakov and - -00:05:45.919 --> 00:05:46.880 -I'm googling - -00:05:46.880 --> 00:05:49.199 -what I have to google so this is very - -00:05:49.199 --> 00:05:50.400 -nice and - -00:05:50.400 --> 00:05:52.800 -if I now that have selected something if - -00:05:52.800 --> 00:05:54.400 -I just press return I will - -00:05:54.400 --> 00:05:57.120 -go back to my normal editing mode with - -00:05:57.120 --> 00:05:57.440 -the - -00:05:57.440 --> 00:06:00.400 -text copied so I can paste it back so - -00:06:00.400 --> 00:06:01.600 -it's a quick way to - -00:06:01.600 --> 00:06:04.160 -interact with copy and interact with uh - -00:06:04.160 --> 00:06:06.400 -with the output of a buffer so finally - -00:06:06.400 --> 00:06:07.840 -let's discuss how to actually - -00:06:07.840 --> 00:06:10.560 -use beta let's circle back and let's go - -00:06:10.560 --> 00:06:12.400 -and let's look at the github repo - -00:06:12.400 --> 00:06:14.400 -where development is happening v term is - -00:06:14.400 --> 00:06:15.520 -available in velpa - -00:06:15.520 --> 00:06:17.919 -but since it's leveraging the power of - -00:06:17.919 --> 00:06:18.960 -an external module - -00:06:18.960 --> 00:06:20.639 -you must have Emacs compiled with - -00:06:20.639 --> 00:06:22.000 -support for modules - -00:06:22.000 --> 00:06:25.600 -and many distros like ubuntu debian - -00:06:25.600 --> 00:06:27.199 -that's not there so you have to get - -00:06:27.199 --> 00:06:29.840 -Emacs with support for modules compiling - -00:06:29.840 --> 00:06:30.160 -or - -00:06:30.160 --> 00:06:32.000 -getting images somewhere else and also - -00:06:32.000 --> 00:06:33.840 -the first time you are going to use this - -00:06:33.840 --> 00:06:34.400 -which - -00:06:34.400 --> 00:06:37.440 -works only on mac or - -00:06:37.440 --> 00:06:40.319 -new linux systems Emacs will try to find - -00:06:40.319 --> 00:06:41.759 -and compile this module - -00:06:41.759 --> 00:06:43.680 -so it's important this requirement is - -00:06:43.680 --> 00:06:45.440 -important if you're using windows - -00:06:45.440 --> 00:06:47.600 -well that's not it's not available and - -00:06:47.600 --> 00:06:49.199 -will not work - -00:06:49.199 --> 00:06:52.560 -so to conclude I want to just advertise - -00:06:52.560 --> 00:06:53.440 -this page - -00:06:53.440 --> 00:06:56.240 -if you have problems look at the issues - -00:06:56.240 --> 00:06:57.120 -and - -00:06:57.120 --> 00:06:59.039 -open unusual in case we'll try to help - -00:06:59.039 --> 00:07:00.800 -you we are very excited about feature - -00:07:00.800 --> 00:07:02.639 -and I think it's a transformative - -00:07:02.639 --> 00:07:10.319 -terminal experience inside glue imax |