Alberto Patino

I watched this interesting Video from C++ creator Bjarne Stroustrup:

In this video, Bjarne mentions what hard is to start interesting projects in C++ such as GUIs and Database development mainly because of lack of tools easy to use, specifically at 37:50 he stresses that for his undergrad students, when trying to do GUI development “the greatest problem was to get the GUI library installed”. “It is painful”.

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Historically, C or C++ development has been difficult, add different compilers, operating systems, libraries, build systems and tools all of them different between them.

In this post I did a “quick” exercise to tests those sentences. My first try was to setup an environment to develop C++ with GTK+, spoiler alert: It was not quick, it was not easy even for me having experience in the C/C++ world. My second try was with mongodb library in Fedora Linux. In this post I will show the setup I have to work and be more productive with this “kind” of development. The first challenge was to get an editor providing intellisense auto completion and source code browsing

In previous posts I showed how to setup Neovim to provide C++ intellisense using Programming Language Server (PLS) with Coc plugin. I did not realize that for third party libraries you need to do further setup.

There are 2 ways to use intellisense for third party libraries with PLS and Coc plugin: clangd and ccls. I tried with ccls and I was not able to make it work, so I stuck with clangd. After many tries I got to use Intellisense with Neovim for mongodb libraries

I did the same for Visual Studio Code:

I have used most of the time vi for code editing, but now we have more options, so I setup both nvim and Visual Studio Code. Nvim I like to use it for quick browsing, code editing. For something more complex I would use Visual Studio Code Editor.

Visual Studio Code vs Nvim advantages:

What I really like from Visual Studio Code is that I can jump to system libraries and third parties source code definition. I can do similar with ctags or rtags in Neovim but in Visual Studio Code is out of the box.

Extensions are more friendly in Visual Studio Code than the ones for the Coc plugin in Neovim. Setup is harder in Neovim.

Debugging is also out of the box with Visual Studio Code. When using only vim I’m used to use gdb.

How it goes with Visual Studio Code integrated debugger:

Setting up libraries and IDE for third party libraries in C++ is not easy. That is the C++ world! For the libraries setup

sudo dnf install mongo-c-driver-devel

sudo dnf install mongo-cxx-driver-bsoncxx-devel

sudo dnf install boost-devel

sudo dnf install mongo-cxx-driver-devel

To compile:

g++ -g --std=c++17 mongodb_main.cpp `pkg-config libmongoc-1.0 --cflags` `pkg-config libmongocxx` --cflags --libs -o mongodb_mai

For the Neovim setup, Install COC and coc clang extension. Install clangd Language Server of course as well.

For Neovim I had to create compile_commands.json file.

For Visual Studio I had to create c_cpp_properties.json:

Enjoy!

I watched LinkedIn training “DevOps Foundations” with Carlos Nunez instructor. In section 3 he shows the use of RSpec and Capibara. I’ll extend a little bit as that section assumes a lot of things from the instructor side.

Step number 1 launches a Docker container with the Nginx web server. That is ok. Then he starts a second container which is Selenium.

Both containers use docker-compose. Nginx is launched with a Docker file. Selenium is not, instead just a raw image is downloaded.

Instructor launches a third container, which contains Rspec and Capybara. This container is specified again with a docker file

What is omitted is an explanation of Selenium, Capybara and RSpec. So let’s start.

Selenium is a web browser instance with an API tailored to be run from a container. The image used here also has a VNC server which is useful when using containers.

Capybara is a Test Framework with support to multiple languages.

RSpec is the ruby DSL.

Why we are using this combo is not explained.

Let’s see my containerfs launched with docker-compose:

I have customized my Linux Terminals. Terminals I use are Terminator and Terminology. I use zsh Shell and Oh-My-Zsh framework to add some cool functionality.

For instance, a cool prompt with git integration. I see a git notification in the prompt telling me that 1 file was modified and 11 files are not tracked. It is a summary from git status.

Nice Icons showing folders and file types …

Tab completion. Type tab key to complete path. You can use arrow keys to navigate files and folders.

Command line Fuzzy finder. Type Ctrl-r in terminal then type command to look for. You will get a list of previous commands typed before associated to search.

Plugins. The git plugin, for instance, shows me all the options for git when typing git then Tab Tab.

Use it with tmux!

Quick steps to achieve this setup.

Install zsh

Install nerd and awesome fonts

Install oh-my-zsh

Install powerlevel10k

Install syntax highlighting and autosuggestion

install fzf then run install

More about fzf here:h

There is no doubt, coding is getting more complex nowadays. I have to code in Python, C and C++ and I have usually used vi for small edits. For production I have used PyCharm, for C, C++ Visual Studio.

Visual Studio Code is a great editor with multiple extensions to support different languages. Although, I am used to vim and I always tried to setup intellisense to support different languages.

I like to use Visual Studio Code, however, I feel more productive with vi editor. In this post I’m setting up NeoVim with Coc to code in my favorite languages. In the past I tried vim with different plugins to have code completion.

Finally, I think NeoVim plus Coc is a good option to use vim.

COC requires nodejs and yarn. So, first step is to install those tools:

Install nodejs, create node repo:

curl -sL https://rpm.nodesource.com/setup_14.x | sudo bash 

Install nodejs

sudo dnf install nodejs

Install yarn:

Create yarn repo with

[yarn]
 name=Yarn Repository
 baseurl=https://dl.yarnpkg.com/rpm/
 enabled=1
 gpgcheck=1
 gpgkey=https://dl.yarnpkg.com/rpm/pubkey.gpg

Install yarn

sudo dnf install yarn

Install Vim Plug:

sh -c 'curl -fLo "${XDG_DATA_HOME:-$HOME/.local/share}"/nvim/site/autoload/plug.vim --create-dirs \

       https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim'

Setup Plugin Manager in your init.vim file:

Plug 'neoclide/coc.nvim', {'do': 'yarn install --frozen-lockfile'}

Launch NeoVim and manage code completion from inside NeoVim. This is what I like more about COC, you can install all the code completion extensions using CocInstall:

CocInstall coc-rust-analyzer and others....

PYTHON

Notes: Set interpreter to python 3. Optional use Jedi or language server. I’ll use Jedi:

I had to remove python3-jedi package from Fedora and install it with pip3. You can use CocConfig to setup json file and toggle jedi or language server.

C++

RUST

You need to setup Rust-Analyzer with CocConfig

GO

SetUp Go settings with CocConfig.

My coc-settings.json:

I was used to SetUp VirtualBox Guests with a Network Bridge in order to have bidirectional access from Host to Guest or Guest to Host. In the simpler NAT mode, I was only able to ssh from my Host to Guest but not ssh from Guest to Host.

Most of the time I used the Bridge Network Mode in Virtual Box, then I switched from Virtual Box to KVM/qemu/libvirtd. Thanks to virt-manager or Gnome Boxes it was relatively easy to use those tools instead of VirtualBox.

When using virt-manager, you have the option to setup the network mode from GUI. Unfortunately there is not an option in drop box to select Network bridge. Instead we have to create the bridge from command line.

Use Network Manager Client to create “br0” bridge interface, in my case the physical Ethernet network interface (From a ThinkPad docking) is: enp0s20f0u2u1i5.

 sudo nmcli con add ifname br0 type bridge con-name br0                                                                                  

sudo nmcli con add type bridge-slave ifname enp0s20f0u2u1i5 master br0                                                                  

Bring down physical Ethernet interface and bring up bridge br0.

sudo nmcli con down "Wired connection 1"                                                                                                 

sudo nmcli connection up br0

Setup xml file to be used by virsh:

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Use virsh:

sudo virsh net-define ./kvm_br0.xml                                                                                                      

sudo virsh net-start br0                                                                                                      

sudo virsh net-autostart br0                                                                                                             

You will see bridge br0 in drop box from virt-manager

My host now has IP Address 192.168.0.104

My KVM guess has IP Address 192.168.0.105. Then, thanks to bridge I can ssh from Ubuntu Guest to my Fedora Host!

You can modify bridge IP address manually as well. For instance, use:

nmcli connection modify br0 ipv4.addresses '192.168.X.X/24'
nmcli connection modify br0 ipv4.gateway '192.168.X.254'
nmcli connection modify br0 ipv4.dns '192.168.X.254'
nmcli connection modify br0 ipv4.method manual

This post will show how to install node.js and npm from github repositories. Then typescript will be installed.

First thing clone repo from node.js

git clone https://github.com/nodejs/node.git 

Then, as per instructions to build run ./configure and the make -j4

Prerequisites are python, gcc and make.

This will create node command. What is not clear is how npm is inside this distro.

npm is the package manager and it is only a js file run by node. This is included in node distribution,

but there is also a npm github site. What I found is that only documentation is built with npm git repository.

git clone https://github.com/npm/cli.gi

However, I used this command to install npm:

curl -L https://www.npmjs.com/install.sh | sh

Once I built node binary I copied to my ~/bin folder and then to my path.

npm uses 2 locations to set up libraries. Global and local. I’m new to node so I understood that local is project specific. In the other side, global it means only one path.

For instance, from my own build, global is set to:

In this prefix main modules should be installed:

Finally to install typescript use npm to install it. In this sample, I’m using npm from GitHub Repo. This is pointing to different global prefix.

This is weird. I think I’ll use npm version I installed with curl.

In an additional note, npm from Git repo did not work at all. I had to change npm script to fix path issue with npm_cli.js. Once I did that change npm worked:

I changed these lines from npm file:

18 ###NPM_CLI_JS="$basedir/node_modules/npm/bin/npm-cli.js"
19 NPM_CLI_JS="$basedir/npm-cli.js

Anyway, tsc is ready to run typescript files.

I was looking for a setup to test my OAuth2 Knowledge and I found excellent videos and articles in internet. Specifically I followed this one:

Now, trying to create my own test I went to my Google Cloud Platform Console and create my Oauth2 Client Id and Consent Screen. Please, note that GCP offers different options to add a Client Id. I selected the one for Web Application Client.

OAuth2 needs consent screen

Now, lets test with OAuth2 debug tool: State is not in screenshot but I set it to “anti-forgery”. See success screen.

Continuation …

And it worked!

look at

Then use code to get token. I used Postman:

After I upgraded my Alienware to Windows Developers Preview I noticed AWCC was not loading thermal and overclock options.

Issue is narrowed down to XTUOCDriverService. This is not able to start and it is linked to Intel Tuning Utility. The driver should be used by Alienware OC Controls for overcloking.

However after I reinstalled Intel Tuning Utility this is not fixing issue. I moved temporally these files:

I reinstalled everything even XTUOCDriverService. However issue is not fixed.

I noticed this issue after I moved my laptop to Windows Insider Preview Program

I think I need to report this to Microsoft.

Download Go from Git repo:

Label your go version with your signature:

Build Go Dev

SetUp GOROOT

SetUp GOPATH

Install code-insiders

Install dlv Extension

Install go Extension

Start coding with GO!

I was wondering how extensions for Visual Studio Code are created. Googling I found this.

I followed instructions there and created my first demo extension.

Step number 1 is to install with npm :

npm install -g yo generator-code

Then, generate boilerplate code

yo code

You wil see:

Check the dialog:

Then, check typescript generated code and setup in package.json

Check the simple message on the bottom

You can even debug the typescript code.