WEBVTT 00:01.196 --> 00:02.029 -: In the last section, 00:02.029 --> 00:02.862 we created our service account 00:02.862 --> 00:04.560 and we downloaded a JSON file 00:04.560 --> 00:07.320 that contains some credentials for that service account. 00:07.320 --> 00:10.140 We now need to download and install the Travis CLI 00:10.140 --> 00:11.760 which is a program that we're going to use 00:11.760 --> 00:14.550 to encrypt that service account JSON file 00:14.550 --> 00:16.950 and tie it to our Travis CI account. 00:16.950 --> 00:18.870 Remember, the entire idea behind this 00:18.870 --> 00:20.790 is that the JSON file we just downloaded. 00:20.790 --> 00:23.760 So this one right here has some very sensitive information 00:23.760 --> 00:25.710 inside of it and we do not want to expose it 00:25.710 --> 00:26.543 to the outside world 00:26.543 --> 00:28.590 from our GitHub account. 00:28.590 --> 00:31.623 All right, so to download and install the Travis CLI, 00:33.034 --> 00:35.250 we can go to Github.com blah blah blah, 00:35.250 --> 00:37.620 and download this thing and install it. 00:37.620 --> 00:40.230 However, there's just one little awkward thing 00:40.230 --> 00:41.943 about the Travis CLI, 00:42.904 --> 00:43.800 and that is that it requires Ruby 00:43.800 --> 00:45.650 to be installed on your local system. 00:47.176 --> 00:48.270 Now, if you are on a mac Os machine, 00:48.270 --> 00:49.980 you're in luck because by default, 00:49.980 --> 00:52.260 Ruby is installed on mac Os. 00:52.260 --> 00:54.330 However, if you are on Windows, 00:54.330 --> 00:56.490 well, life is a little bit harder. 00:56.490 --> 00:59.700 On Windows, installing Ruby is a little bit more challenging 00:59.700 --> 01:01.683 and it's kind of a pain in the rear. 01:03.900 --> 01:04.890 Now, I would hate to have to go 01:04.890 --> 01:06.930 through the Ruby installation process with you 01:06.930 --> 01:07.763 if you're on Windows 01:07.763 --> 01:09.090 because it is a little bit of a pain 01:09.090 --> 01:11.070 and it takes a decent amount of time. 01:11.070 --> 01:14.130 But there is a little work around that we can use. 01:14.130 --> 01:15.360 I want you to remember, 01:15.360 --> 01:17.580 what have we been doing in this entire course? 01:17.580 --> 01:20.370 We've been creating Docker images and containers 01:20.370 --> 01:22.770 and the entire purpose of these containers 01:22.770 --> 01:26.160 is that we can very easily get some different environment 01:26.160 --> 01:28.080 up and running on our local machine 01:28.080 --> 01:30.330 with some very customized dependencies 01:30.330 --> 01:32.310 inside of that container. 01:32.310 --> 01:35.790 So I think that rather than trying to install Ruby locally 01:35.790 --> 01:36.623 on your machine, 01:36.623 --> 01:38.790 especially if you are on Windows, 01:38.790 --> 01:42.000 instead, let's try getting a Docker image 01:42.000 --> 01:44.643 that has Ruby pre-installed inside of it. 01:45.600 --> 01:48.630 So we're going to get an image that has Ruby pre-installed. 01:48.630 --> 01:50.700 We'll then open up a shell or a terminal 01:50.700 --> 01:53.400 inside of that container and then we'll use that 01:53.400 --> 01:55.980 to install and run the Travis CLI. 01:55.980 --> 01:57.840 There's only a single command we have to run 01:57.840 --> 01:59.700 with Travis CLI essentially, you know, 01:59.700 --> 02:02.010 just the one command to encrypt that file 02:02.010 --> 02:02.910 that we care about. 02:02.910 --> 02:04.950 So we don't really need a persistent version 02:04.950 --> 02:06.600 of the Travis CLI to sit around 02:06.600 --> 02:08.310 because we just want to use it one time 02:08.310 --> 02:09.630 and then throw it away. 02:09.630 --> 02:11.430 So this would actually be a great use case 02:11.430 --> 02:12.960 where we could use a Docker container 02:12.960 --> 02:14.940 with Ruby already installed inside of it 02:14.940 --> 02:17.700 to install Travis CLI, 02:17.700 --> 02:18.840 use it to encrypt the file, 02:18.840 --> 02:20.790 and then throw the entire container away 02:20.790 --> 02:23.220 'cause we don't need it for anything else. 02:23.220 --> 02:24.633 So let's give this a shot. 02:25.800 --> 02:27.720 Now, in this section as we go through this process 02:27.720 --> 02:30.420 we are going to be running a good number of commands. 02:30.420 --> 02:32.460 And so, I wanted to put all the commands up here 02:32.460 --> 02:34.290 and all the different steps we're going to go through 02:34.290 --> 02:35.880 just in case you are skipping 02:35.880 --> 02:37.230 through this video rather quickly, 02:37.230 --> 02:39.120 I wanna make sure that you don't accidentally skip 02:39.120 --> 02:40.770 one of the commands inside of here. 02:40.770 --> 02:43.350 So I would almost recommend that you take a screenshot 02:43.350 --> 02:45.390 of this diagram right here just to make sure 02:45.390 --> 02:48.660 that you nail each and every one of these commands. 02:48.660 --> 02:50.704 So the first thing we're going to do 02:50.704 --> 02:52.950 is execute a Docker run command. 02:52.950 --> 02:54.450 The image that we're going to be running 02:54.450 --> 02:57.090 is Ruby version 2.3. 02:57.090 --> 02:58.140 And then at the same time, 02:58.140 --> 03:00.750 we're gonna start up a shell inside there 03:00.750 --> 03:03.060 and we're also gonna set up a volume. 03:03.060 --> 03:04.350 The purpose of the volume right here 03:04.350 --> 03:07.740 is to eventually get the service account JSON file 03:07.740 --> 03:09.060 inside the container. 03:09.060 --> 03:10.980 Remember, this is the file that we want to encrypt 03:10.980 --> 03:11.813 so we need to make sure 03:11.813 --> 03:14.220 that it is available inside the container. 03:14.220 --> 03:16.470 So we're going to use a volume to do that. 03:16.470 --> 03:19.350 Now, notice that we're using the dollar sign parentheses 03:19.350 --> 03:20.550 and interpolation here. 03:20.550 --> 03:23.160 This is only valid if you're on a Unix-based system 03:23.160 --> 03:26.730 or if you're on Windows using Git Bash as your terminal. 03:26.730 --> 03:28.740 If you are on Windows and you're using something 03:28.740 --> 03:31.740 like the command line or PowerShell, 03:31.740 --> 03:33.960 you're going to use curly braces there instead. 03:33.960 --> 03:36.540 So just be aware of that little difference. 03:36.540 --> 03:38.250 Okay, so let's get to it. 03:38.250 --> 03:40.260 I'm gonna open up my terminal and I'm going to make sure 03:40.260 --> 03:42.450 that I'm inside of my complex directory 03:42.450 --> 03:45.420 because we're going to eventually put that JSON file 03:45.420 --> 03:48.360 inside of here and encrypt it. 03:48.360 --> 03:50.670 And we're using specifically the complex directory 03:50.670 --> 03:52.500 'cause remember we're going to make sure 03:52.500 --> 03:54.060 that the volume is available 03:54.060 --> 03:55.290 inside the container. 03:55.290 --> 03:56.733 All right, so we'll do Docker run 03:56.733 --> 03:58.950 dash I T 03:58.950 --> 03:59.783 dash V 03:59.783 --> 04:00.723 to set up the volume. 04:02.510 --> 04:03.990 I'll say dollar sign PWD 04:03.990 --> 04:05.550 to say present working directory 04:05.550 --> 04:07.740 of the complex folder. 04:07.740 --> 04:09.070 I'll then do a colon 04:09.968 --> 04:11.940 and I'm going to map this present working directory 04:11.940 --> 04:14.370 of complex to the folder 04:14.370 --> 04:16.710 about app inside the container. 04:16.710 --> 04:18.600 Now we don't actually have any app thing to put 04:18.600 --> 04:19.433 inside the container, 04:19.433 --> 04:23.010 I'm just choosing that folder name totally at random. 04:23.010 --> 04:24.090 You could probably figure out a better name 04:24.090 --> 04:27.090 but honestly it just doesn't really matter that much. 04:27.090 --> 04:29.470 We'll then specify the image of Ruby 2.3 04:31.500 --> 04:33.480 and then the command that I want to run inside 04:33.480 --> 04:35.400 of this container is sh 04:35.400 --> 04:37.113 to start up a shell inside there. 04:38.070 --> 04:40.500 Okay, so I'm gonna run this command. 04:40.500 --> 04:41.910 Now when I run the command, 04:41.910 --> 04:44.580 I immediately get kicked into a terminal right here 04:44.580 --> 04:46.410 or a shell inside the container 04:46.410 --> 04:48.870 because I've already downloaded the Ruby image 04:48.870 --> 04:49.770 in the past. 04:49.770 --> 04:51.960 For you, you probably need to download this image 04:51.960 --> 04:54.120 and so it's gonna take maybe a minute or two 04:54.120 --> 04:55.080 to download the image 04:55.080 --> 04:57.090 and then eventually create a container out of it. 04:57.090 --> 04:59.190 So I encourage you to pause the video right now 04:59.190 --> 05:01.350 and just leave it paused until you eventually get 05:01.350 --> 05:02.763 into a shell like so. 05:05.010 --> 05:06.120 Okay, so if you're now here 05:06.120 --> 05:08.970 I'm going to assume that you've successfully gotten 05:08.970 --> 05:11.040 into a shell inside the container. 05:11.040 --> 05:13.424 So if we now do an ls, we can see that app folder. 05:13.424 --> 05:15.045 So there's the app folder right there 05:15.045 --> 05:18.720 the one that we just set up as a volume. 05:18.720 --> 05:20.670 If I change into that app folder 05:20.670 --> 05:22.500 and I encourage you to do so right now as well. 05:22.500 --> 05:24.690 So I'm gonna make sure I'm inside that app folder. 05:24.690 --> 05:28.140 I can do an ls and I'll see all of the project folders 05:28.140 --> 05:30.663 out of our original complex directory. 05:31.500 --> 05:34.140 Okay, so that definitely worked out pretty well so far. 05:34.140 --> 05:36.030 So now the next thing we're going to do 05:36.030 --> 05:37.650 is install Travis. 05:37.650 --> 05:39.310 This is the Travis CLI 05:40.170 --> 05:43.435 We're installing it by using the program, jim 05:43.435 --> 05:44.760 Jim is essentially a dependency manager 05:44.760 --> 05:46.770 for the Ruby programming language. 05:46.770 --> 05:49.803 So we're using the jim program to install Travis. 05:50.790 --> 05:52.140 So I'll do jiminstalltravis 05:53.790 --> 05:54.623 and I'll put on 05:54.623 --> 05:56.550 no dash r doc 05:56.550 --> 05:58.920 and no RI 05:58.920 --> 06:00.930 And these two flags over here at the right hand side 06:00.930 --> 06:02.550 these are a hundred percent optional. 06:02.550 --> 06:03.690 They're essentially just saying 06:03.690 --> 06:04.523 do not attempt to 06:04.523 --> 06:06.930 install any documentation along with this jim 06:06.930 --> 06:08.760 It just makes the installation go very 06:08.760 --> 06:10.830 very slightly faster. 06:10.830 --> 06:14.280 All right, so I'm gonna run this and then 06:14.280 --> 06:17.430 we're going to very quickly see everything get installed. 06:17.430 --> 06:18.810 All right, now it looks like I paused there 06:18.810 --> 06:21.570 for a second on building native extensions. 06:21.570 --> 06:24.210 Now something kind of interesting that I want to mention 06:24.210 --> 06:25.860 this is a total side topic, 06:25.860 --> 06:27.060 completely unrelated 06:27.060 --> 06:29.370 from all this Travis stuff and you're probably gonna hate me 06:29.370 --> 06:30.540 for going on a side topic 06:30.540 --> 06:32.280 while we're running all these intense commands, 06:32.280 --> 06:34.230 but I have to do it, 06:34.230 --> 06:36.090 I have to tell you about this side topic. 06:36.090 --> 06:38.280 I feel a hundred percent compelled to do so. 06:38.280 --> 06:39.900 So you'll notice during that entire process 06:39.900 --> 06:42.510 it says building native extensions right here. 06:42.510 --> 06:44.550 That's essentially a step where Ruby 06:44.550 --> 06:45.960 and the jim program 06:45.960 --> 06:48.180 are taking a bunch of Ruby Source code files 06:48.180 --> 06:50.340 and essentially compiling them to get them to work 06:50.340 --> 06:51.930 on your local system. 06:51.930 --> 06:53.760 Now that's kind of a build step 06:53.760 --> 06:56.452 and it requires some modules inside 06:56.452 --> 06:58.725 of Ruby to be installed or essentially these kind 06:58.725 --> 07:01.380 of development programs to be installed with Ruby. 07:01.380 --> 07:02.280 One thing you might notice 07:02.280 --> 07:05.410 that's kind of interesting is when we originally ran 07:06.563 --> 07:07.530 that docker run command right here 07:07.530 --> 07:12.240 we specified a image tagged as 2.3 from Ruby. 07:12.240 --> 07:16.023 If you actually open up the Docker hub page, 07:18.180 --> 07:20.430 so Docker hub for that Ruby image 07:20.430 --> 07:22.092 we just made use of... 07:22.092 --> 07:22.925 So I'm gonna search for Ruby 07:22.925 --> 07:24.300 and then go to the repository right here. 07:24.300 --> 07:25.133 You'll notice that 07:25.133 --> 07:27.930 there are a ton of other versions available, 07:27.930 --> 07:30.300 some of which are tagged as alpine. 07:30.300 --> 07:31.950 So remember a alpine version 07:31.950 --> 07:33.810 of an image is essentially just saying, 07:33.810 --> 07:35.970 Hey, this is a stripped down version of this image 07:35.970 --> 07:38.520 with just the bare minimum required 07:38.520 --> 07:40.350 to get this thing running. 07:40.350 --> 07:41.370 Now in our case 07:41.370 --> 07:45.240 we had to install a jim that did this extra build step 07:45.240 --> 07:46.073 and like I said 07:46.073 --> 07:49.290 that requires some extra packages to be installed with Ruby. 07:49.290 --> 07:53.070 If we had used the Alpine version of this Ruby image 07:53.070 --> 07:55.770 this step right here would've actually completely failed. 07:55.770 --> 07:57.960 'Cause remember the Alpine version is a hundred 07:57.960 --> 07:59.100 percent stripped down. 07:59.100 --> 08:01.530 And so the Alpine version of the Ruby image does 08:01.530 --> 08:05.640 not have those extra packages required to do this step 08:05.640 --> 08:07.920 of building a native extension. 08:07.920 --> 08:09.690 So if we had used, 08:09.690 --> 08:11.850 I keep scrolling up 'cause I think the command is up there, 08:11.850 --> 08:12.690 but it's not. 08:12.690 --> 08:14.940 If we had used an Alpine version 08:14.940 --> 08:17.490 like say Alpine 2.3 right here 08:17.490 --> 08:19.320 that jim installs step would've failed 08:19.320 --> 08:21.300 because we did not have all the dependencies 08:21.300 --> 08:23.910 required to build this jim. 08:23.910 --> 08:26.280 So this is a great example where the Alpine version 08:26.280 --> 08:28.980 of an image is not always the best solution, 08:28.980 --> 08:30.810 not always the best solution. 08:30.810 --> 08:33.120 Okay, I apologize for that little quick aside, 08:33.120 --> 08:34.290 I just had to mention it. 08:34.290 --> 08:36.720 I felt compelled, like I mentioned. 08:36.720 --> 08:38.049 All right, so it looks 08:38.049 --> 08:40.020 like everything successfully got installed. 08:40.020 --> 08:41.940 So now to make sure everything is set up correctly 08:41.940 --> 08:44.970 I'll do the command Travis like so 08:44.970 --> 08:45.803 it's gonna ask me 08:45.803 --> 08:47.790 if I want to install some shell completion. 08:47.790 --> 08:50.280 This is essentially some autocomplete stuff. 08:50.280 --> 08:51.113 We don't need it 08:51.113 --> 08:53.580 because we're just running like one or two commands here. 08:53.580 --> 08:54.723 So I'll just say no. 08:55.710 --> 08:58.050 And then after that I'll get prompted here 08:58.050 --> 09:00.090 with the list of all the commands that are available 09:00.090 --> 09:02.080 to me tied to the Travis CLI 09:03.090 --> 09:04.690 Okay, so Travis is definitely up 09:05.638 --> 09:07.080 and running successfully without us having to go 09:07.080 --> 09:09.780 through that long process of installing Ruby. 09:09.780 --> 09:11.280 Now let's take a quick pause right here. 09:11.280 --> 09:12.720 We're gonna come back to the next section 09:12.720 --> 09:13.740 and we're gonna continue going 09:13.740 --> 09:15.420 through a couple of other steps. 09:15.420 --> 09:17.783 So quick break and I'll see you in just a minute.