DEV Community: Anatoli Babenia

Find delegated methods in Ruby on Rails

Anatoli Babenia — Wed, 09 Nov 2022 16:39:30 +0000

I needed a way to find delegated methods in GitLab codebase for testing, so I came up with this.

delegated = delegates(project, :ci_cd_settings)

def delegates(fromobj, tosym)
  # Get map of delegated methods.

  # Rails doesn't maintain a table of delegated methods, so it needs to be
  # reconstructed by parsing methods source.
  regex = /^\s*delegate .*to: \s*:#{tosym}.*/mx

  delegated = {}
  fromobj.methods.each do |symname|
    method = fromobj.method(symname)
    next unless method.source_location

    next unless method.source =~ regex

    name = symname.to_s
    # Example for `Project.last.method("ci_opt_in_jwt").source``
    # "  delegate :opt_in_jwt, :opt_in_jwt=, to: :ci_cd_settings, prefix: :ci, allow_nil: true\n"
    prefix_match = method.source.match /prefix: \s+ :(\w+)/mx
    delegated[name] =
      if prefix_match
        name.delete_prefix("#{prefix_match[1]}_")
      else
        name
      end
  end
  delegated
end

Hate of Leadership

Anatoli Babenia — Tue, 20 Jul 2021 09:31:48 +0000

I've just read the post https://sourcehut.org/blog/2021-07-17-the-10x-programmer-is-a-leader/ from Drew DeVault and triggered. Usually my hate for "leaders" is so strong that I can't even write, but here I agree with everything Drew said, except for the word "leader". Maybe it was my experience, but I often encounter self-proclaimed "leaders" who are people that want to put themselves above others.

First time I encountered this pattern in MLM sect. The sect had no real product. Everything they did was paid teaching on how to wear a suit, and how to mess with people to bring more paying followers.

I hate self-proclaimed leaders the same way I hate self-proclaimed presidents. I know that both mostly exist in post soviet countries and holywood movies. Types I've rarely seen in successful business environment, but living in hierarchical country where I see some young people want to become a "leader", I imagine that they want to be a suit-case "leader" who rides in a black car and can not give a f* about "plebs". I can understand them. The pressure of living in an authoritarian country, where the rules are dumb and you are punished for everything with no sane explanation is too high. The "peaceful" terror is so draining, that it becomes a dream to climb higher to escape it, and take revenge on others. When you speak of "leadership" this is what it means to me.

The Drew's article is an awesome reference, and I will probably show it to people, who believe in "leadership" from company management courses. But I would prefer a word that would be neutral towards me, and won't make me suffer, because in the world of "leadership" if I am not the leader, then I am the slave. And I can't be happy in being one or the other. I don't want people like me to hate me, and I don't want to treat others low. There must be a different gameplay. Evolved for 21th century. Now we are all synchronized. Don't need to waste this opportunity until some "leaders" who are uncomfortable without their crowns, to break this down back into medieval times when network connection was a privilege.

The net made it obvious that people are limited. Those who have the time and interests to see what needs to be done are not necessarily those who can make it done. And people who are doing actual things may not have interest in coordinating and even talking to other people. But why some of the people are starting to name others as "leaders"? I can only have one explanation - they don't know alternative gameplay. And the "leader" will make sure they won't, because then they will lose their authority.

To explain alternative gameplay, where people can help each other without going through a rigid hierarchical model, there should be different role names than just a single superhero "leader". Roles that would make those who seek to put themselves above others, uninterested.

LSP client for vim

Anatoli Babenia — Thu, 17 Jun 2021 06:34:14 +0000

coc.nvim is the best, because.. it is most user friendly - tells what it does and waits for user to read.

This is important, because vim has too many things that contain text - windows, buffers, splits, stdout, messages - and new/occassional users are probably not aware how to inspect and leave them.

vim is truly a lifelong learning editor.

Sacriledger

Anatoli Babenia — Wed, 02 Dec 2020 10:21:54 +0000

The ledger to burn your money.

Once put in there, you can not extract or control them. You can only hope and pray that they will serve a better purpose. Nothing is sacred anymore, so let's get rid of that.

Add Haml validation to CI/CD

Anatoli Babenia — Sat, 25 Jul 2020 12:48:02 +0000

TL;DR

Add this to your .gitlab-ci.yml or whatever CI/CD system you are using.

find . -name "*.haml" -type f -print0 | xargs -0L1 sh -c \
  'for arg do echo -n "$arg .. "; haml --check "$arg"; done' _

Explanation

Use find to find all .haml files in current directory recursively. Pass paths of find files to xargs. Use \0 symbol as file delimiter. For each file, run sh command. In sh command print path of the file and run haml --check on it.

find is necessary, because haml utility is unable to search for files on its own. xargs is needed, because find can not detect if executed program failed. sh is needed, because haml can not report the filename being checked.

Credits

Ruby on Rails is not MVC - it is RCMV

Anatoli Babenia — Wed, 29 Apr 2020 09:13:12 +0000

Found it at amazing RailsBridge pages. Would be interested to see similar paintings for React and other application frameworks.

Script to move from Bitbucket Hg to Git

Anatoli Babenia — Sat, 25 Apr 2020 17:10:20 +0000

Bitbucket was born as a Mercurial hosting, and now the service is being stripped of Hg by Atlassian. Atlassian warned that it will just remove the repos. It doesn't seem to care to archive them. That's why you are here.

To use the script, you will need to edit REMOTE variable to point to your remote Mercurial repository. When your run the script, it will download hg-git, clone and convert your repo, and drop you into the shell in newly converted git repository, which you can immediately git push to GitHub, GitLab or another hosting of your choice.

#!/bin/bash

set -x

REMOTE=ssh://hg@bitbucket.org/rainforce/pyrobot
NAME="$(basename $REMOTE)"

mkdir /tmp/"$NAME"
cd /tmp/"$NAME"
hg clone https://foss.heptapod.net/mercurial/hg-git
hg clone "$REMOTE"

mkdir "$NAME"-git
(cd "$NAME"-git &&
 git init)

(cd "$NAME" &&
 hg bookmarks hg &&
 hg --config extensions.hggit=../hg-git/hggit push ../"$NAME"-git)

(cd "$NAME"-git &&
 git checkout -b master hg &&
 $SHELL)

Mercurial is still awesome.

Regenerate Gemfile.lock

Anatoli Babenia — Sat, 14 Dec 2019 12:04:02 +0000

TL;DR

With Docker.

rm Gemfile.lock
docker run --rm -it -v "$PWD:/app -w /app ruby:2.7 \
    bundle install

With podman.

rm Gemfile.lock
podman run --rm -it -v "$PWD":/app -w /app \
    --security-opt label=disable ruby:2.7 \
    bundle install

For info specific to Heroku scroll down.

Backstory

Some time ago I've got a request from my friend to edit information on his website for which the original developer had gone. The web site was written in Ruby on Rails and it was deployed on Heroku using their cedar-14 stack running on Ubuntu 14.

With no experience with Rails or Ruby or Heroku it took almost two weeks to get that app properly backed up and code running on newer heroku-18 base. The first thing I had to do is to brine dependencies in Gemfile.lock up-to-date to close security bugs and possible glitches on newer OS.

Since then I repeated the operation several times for different Ruby projects and recorded it on dev.to for reference.

I didn't want to ruin anything in my friend's existing deployment, so I made a copy of the web site both on new Heroku heroku-18 plan and on local machine. My local machine is using Fedora, and to avoid configuration drift (and keep my system clean) I did all work in a Linux container.

Creating Linux container

There are many tools to work with Linux containers. I use podman.

Make sure you are in your project dir, because it will be shared with the software in container.

NAME=$(basename "$PWD")
podman run -v "$(pwd)":"/root/$NAME":z -w "/root/$NAME" -it heroku/heroku:18-build

NAME= takes the name of the current dir. -v makes the current dir available inside /root directory in container, and makes it the current dir when container starts. -it allows to type commands when container starts.

As I used Heroku, it was important to find an image with all development libraries, needed to compile and install some gems. At first I used just heroku:18 where I had to spend a day or two to find out and install all the dependencies. Then I found the reference to heroku:18-build image at https://devcenter.heroku.com/articles/heroku-18-stack#heroku-18-docker-image

Updating `Gemfile.lock`

The next problem I spent a day or two was a problem with bundler installer. It is not included in herokiu:18-build image, and I discovered that the latest bundler 2.x doesn't work on Heroku. I found a way to install 1.x.

gem install bundler --version "~> 1"

The rest of it came easy. Remove Gemfile.lock and regenerate it using bundler install.

bundler install

Heroku summary

Run this.

podman run -v "$(pwd)":"/root/app":Z -w "/root/app" -it heroku/heroku:18-build

And then inside container this.

gem install bundler --version "~> 1"
rm Gemfile.lock
bundle install

If you've got this error message.

# bundle install
Your Ruby version is 2.6.5, but your Gemfile specified ~> 2.5.7

Then do.

✗ rm Gemfile.lock
✗ podman run -v "$(pwd)":"/app":Z -w "/app" -it ruby:2.5 bundle install

Install latest Go 1.13.1 on Fedora 30

Anatoli Babenia — Mon, 14 Oct 2019 19:43:03 +0000

Go 1.13 was released just a few weeks ago and I already need it for a better error control.

I am test driving vim-go for landing some changes to tflint. Awesome vim-go can easily install all necessary tools for Go development with simple :GoInstallBinaries command, except for the go itself.

Fedora 30 that I use comes with Go 1.12 and I didn't switch to beta 31 yet. The official instructions from golang website tell to just download and unpack tarball, set some environment variables in profile, and that seemed too burdensome. I will have to repeat that every time when I need some security updates and bugfixes. I also don't want to think about possible version conflicts when I finally switch to Fedora 31.

Instead I found out that I can install Go from snapcraft, which is official project by Canonical. Thanks to generous people out there, snaps are available for Fedora, and you can choose the Go version you need.

# install `snapd`, which is necessary to run snaps
sudo dnf install snapd
# classic snaps like `go` require some symlinking
sudo ln -s /var/lib/snapd/snap /snap
# `go` snap from will be updated automatically
sudo snap install go --channel 1.13/stable --classic

sudo snap info go reveals channels with all available versions.

$ sudo snap info go | grep stable
tracking:     1.13/stable
  stable:         1.12.10       2019-09-25 (4520) 92MB classic
  1.13/stable:    1.13.1        2019-09-25 (4517) 92MB classic
  1.12/stable:    1.12.10       2019-09-25 (4520) 92MB classic
  1.11/stable:    1.11.13       2019-08-15 (4286) 82MB classic
  1.10/stable:    1.10.8        2019-01-24 (3133) 58MB classic
  1.9/stable:     1.9.7         2018-06-13 (2117) 58MB classic
  1.8/stable:     1.8.7         2018-02-07 (1407) 51MB classic
  1.7/stable:     1.7.6         2017-06-02  (324) 48MB classic
  1.6/stable:     1.6.4         2017-05-17  (122) 49MB classic

DEV Community: Anatoli Babenia

Find delegated methods in Ruby on Rails

Hate of Leadership

LSP client for vim

Sacriledger

Add Haml validation to CI/CD

TL;DR

Explanation

Credits

Ruby on Rails is not MVC - it is RCMV

Script to move from Bitbucket Hg to Git

Regenerate Gemfile.lock

TL;DR

Backstory

Creating Linux container

Updating Gemfile.lock

Heroku summary

Install latest Go 1.13.1 on Fedora 30

Updating `Gemfile.lock`