Shower Presentation Engine

Console Into Mass__

Vitalii Rybka

Favourite browser

Console for user

devtools terminal

The escape plan

Console manager
Bash-scripting
Routine tasks automation

Repository

goo.gl/ldvSjh

Slides

goo.gl/Q5KrHT

Compatible OS

Console managers

screen
tmux
screen vs tmux

Console managers. Screen

Installation:

			sudo apt-get install screen
			screen

Console managers. Screen

Basic key combinations:

goo.gl/RyRfO5

Console managers. Screen

An example of configuration (.screenrc):

			# Default is ‘on’, as you probably noticed.
			startup_message off
			# Window list at the bottom.
			hardstatus alwayslastline
			hardstatus string "%-w%{= BW}%50>%n %t%{-}%+w%<"

What are the strange characters in this line hardstatus string "%-w%{= BW}%50>%n %t%{-}%+w%<" can be read here.

Console managers. Screen

Console managers. Tmux

Installation:

			sudo apt-get install tmux
			tmux

Console managers. Tmux.

Basic key combinations:

goo.gl/zSLFIJ

Console managers. Tmux

Console managers. screen vs tmux

screen
`-` Cannot create independent layouts for each tab `-` Cannot save layouts in case of a connection’s drop `-` Before 4.1 version couldn’t support vertical separation `-` Whenever you create a new region, you also need to create a new window `(Ctrl+a, c)`, then shift to the needed directory, etc `-` To delete a region, you’d need to press one more key combination `Ctrl+a, :remove`

Console managers. screen vs tmux

tmux
`+` Boasts quality default settings out-of-the-box `+` No need to customize the arrangement and backlight of the control pane `+` Supports both vertical and horizontal splits `+` In order to close the pane, you only need to enter `exit` `+` Can hold a remote connection by SSH`` `` requires some additional magic

bash

Basics
Conditions
Loops

bash. Basics

Variables
Passing arguments to the script
Processing arguments within the script

bash. Basics. "Hello, world!"

			#!/bin/bash
			echo "Hello, world!"

./hw.sh # how it calls

bash. Basics. Variables

Variables:

name - letters, numbers, _.
value - numbers, strings (if there is any whitespace - wrap into double quotes), characters.

Create (rewrite) variable:

path="~/Docs"

Read variable:

$path

bash. Basics. Arguments

Passing arguments to the script:

./script.sh arg1 arg2 arg3 … argN

Processing arguments within the script:

$1 - first argument

$2 - second argument

$0 - name of script

$# - count of arguments

bash. Basics. Examples

Another one example of working with variables

			#!/bin/bash
			var1=$1
			var2=$2
			echo "Arguments are \$1=$var1 \$2=$var2"

./variables.sh var1 var2 # how it calls

bash. Basics. Conditions

if
if/else
if/elif/else
case/in/esac

bash. Basics. Conditions

if

			git diff origin/master origin/%branch% > %path%

fast_diff.sh

bash. Basics. Conditions

Conditions (strings):

-z <string> # string is empty

-n <string> # string is not empty

<str1> == <str2> # strings are equal

<str1> != <str2> # strings are not equal

bash. Basics. Conditions

Conditions (numbers/strings):

-eq, (==) # equal

-ne, (!=) # not equal

-lt, (<) # less than

-le # less than or equal

-gt, (>) # more than

-ge # more than or equal

bash. Basics. Conditions

Conditions (files):

-e <path> # path is exist

-f <path> # is file

-d <path> # is directory

-s <path> # file size more than 0

-x <path> # file is executable

bash. Basics. Conditions

Conditions (boolean):

! # denial of boolean expression

&& # boolean "and"

|| # boolean "or"

bash. Basics. Loops

for/in
while

bash. Basics. Loops

for/in:

			for i in array
			do
			  # an action, i on every iteration is getting
			  # the next value from array
			done

Helpful links

Routine tasks automation

Up a large number of repositories
Helpful aliases

Up a large number of repositories

vendors
- vendor1
- vendor2
- vendor3
  - vendor3-1
  - vendor3-2
- vendor4
- vendor5

Up a large number of repositories

Solution:

cd %path_to_vendor_repo%
check branch
git pull

Automation

upRepo - final result

Up a large number of repositories. After

Helpful aliases

git branch - how often do you enter this command?
git status - what about this command?
git push origin %branch-name% - what about this?
git commit -m 'some comments' - what about this?
...

Helpful aliases

Helpful aliases

.bashrc, .gitconfig

			alias gst='git status'
			alias gf='git fetch'
			alias ghide='git stash'
			alias gshow='git stash pop'
			alias gmom='git merge origin/master' # !!!
			alias gad='git add'
			alias grm='git rm'
			alias showaliases='cat $HOME/.bashrc | grep alias'

Helpful links

About me

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