This is my loose collection of snippets, applications and commands, I use from day to day.

dot

dot is a graph description language. Assuming a image viewer like feh is installed

echo 'digraph { a -> b; b -> c; a -> c; }' | dot -Tpng | feh -

will show

snippet

remove empty lines from output

sed '/^\s*$/d'

loc

count lines of code (simple)

find . -name '*.extension' | xargs wc -l

same as above without emtpy lines and comments for erlang files

$ find . -name '*.erl' | \ 
> xargs cat | \
> sed -e '/^%/d' -e '/^\s*$/d' | \
> wc -l

for elixir projects

$ find . -type f \( -iname \*.ex -o -iname \*.eex -o -iname \*.exs  \) | \
> grep -v deps | \
> xargs cat | \
> sed -e  '/^\s*$/d' | \
> wc -l

bash

HISTSIZE=""

or

HISTSIZE="INFINITE"

will let the ~/.bash_history grow infinitely. source

gentoo specific aliases

alias eqf='equery f'
alias equ='equery u'
alias eqh='equery h'
alias eqa='equery a'
alias eqb='equery b'
alias eql='equery l'
alias eqd='equery d'
alias eqg='equery g'
alias eqc='equery c'
alias eqk='equery k'
alias eqm='equery m'
alias eqy='equery y'
alias eqs='equery s'
alias eqw='equery w'

alias current="sudo genlop -c"

silver searcher

When you use the silver searcher code search, you can add a .ignore file to the root folder of your application. This file is similar to .gitignore files. Due to the double asterix is not working yet, a quick find can help you to find the files, which should be excluded. e.g.

$ find priv/static/libs/ -type f \( -name "*.js" -o -name "*.css" -o -name "*.map" \)

will find all files with the extension *.js, *.css, or *.map. This is helpfull, when you want to exclude build artefacts.

git

pull all repositories located in sub directories, assuming there are only subdirectories in the current directory

#!/bin/bash
ls | xargs -I{} git -C {} pull

reset a single file

git checkout HEAD -- fileName.xxx

aliases

common aliases

git config --global alias.co checkout
git config --global alias.br branch
git config --global alias.ci commit
git config --global alias.st status

reset a single file to head

git config --global alias.unstage "reset HEAD --"
git unstage file.txt

show graph

git config --global alias.l "log --graph --oneline --all"

cat diff to default browser

With diff2html a git diff output can be transformed into html.

npm install -g diff2html

bcat is a tool for piping data to the standard browser.

git diff branch_1..branch_2 | diff2html -i stdin -o stdout | bcat

With an alias

alias bdiff="diff2html -i stdin -o stdout | bcat"

the call can be simplified to.

git diff branch_1..branch_2 | bdiff

If you want to see the history of a file, you can use

git log -p filename | bdiff

cat the content of a libreoffice or docx document to console

alias lcat="libreoffice --cat"

with

lcat document.docx | vim -

you can browse the text content in your favourite editor ;)

firefox addons

tmux

tmux shortcuts & cheatsheet

basic

Window

Pane

batch

vim

movement

basic movement

jumps

visual

repeats

substitute

settings

misc

haskell

How I start by Chris Allen

Preconditions

after changed into project folder

ghci

erlang / elixir

observer

Erlang has to be emerged with smp and wxwidgetsuse flag. For elixir you can start the observer with

$ iex
Erlang/OTP 20 [erts-9.1] [source] [64-bit] [smp:8:8] [async-threads:10]

Interactive Elixir (1.5.2) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> :observer.start
:ok
iex(2)>
observer
observer

Windows batch programming

Windows batch scripting

.NET / C#

Force to copy an unused assembly

When the compiler sees no usage of a referenced assembly, it won’t be copied to the output folder. If you need for some reason the assembly in your output folder, you can create a dummy usage, which forces the compiler to copy the assembly.

private static void Dummy()
{
    Action<Type> doesNothingWith = _ => { };
    var anyType = typeof(ReferencedAssembly.SomeClass);
    doesNothingWith(anyType);
}

Development stack

Sometimes it is usefull, to start a build from the command line. A make_debugBuild.bat can look like

call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools\VsDevCmd.bat"
msbuild SolutionName.sln /p:Configuration=Debug

For a make_releaseBuild.bat you can just change the msbuild Configuration parameter.

call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools\VsDevCmd.bat"
msbuild SolutionName.sln /p:Configuration=Release

To delete common generated / build folders from command line, you can use a cleanup.bat like

FOR /F "tokens=*" %%G IN ('DIR /B /AD /S obj') DO RMDIR /S /Q "%%G"
FOR /F "tokens=*" %%G IN ('DIR /B /AD /S bin') DO RMDIR /S /Q "%%G"

REM RMDIR /S /Q AdditionalFolderToDelete

Windows

Here comes the Windows related stuff

Chocolatey

A package manager for Windows.

Installation

Before the installation you must allow remote scripts to run. Start a powershell with administrator rights

Set-ExecutionPolicy RemoteSigned
iwr https://chocolatey.org/install.ps1 -UseBasicParsing | iex

Ack

choco install ack

misc

whatching amazon prime video from chromium on a gentoo system via chromecast

At first the widevine use flag for chromium has to be enabled. It enables the closed source capability of chromium, used by Amazon Prime Video and Netflix. The chrome://flags/#load-media-router-component-extension has to be enabled. With this configuration you can go to prime videos and cast the tab while playing.

In the long run a fire tv stick is a better fit, because it comes from the same house.

setup system date

# date 041513122017
Sat Apr 15 13:12:00 CEST 2017

xclip

cat id_rsa.pub | xclip -selection clipboard

brightness

$ sudo echo 800 > /sys/class/backlight/intel_backlight/brightness

sets the current brightness to 800. (1500 is default)

gcalcli

Working with the Google calendar on console

put a .gcalclirc in users home directory

--client_id=<client_id>
--client_secret=<client-secret>
--locale=de_DE.utf8
--defaultCalendar=<calendar name>

Set up some convenient aliases

alias week="gcalcli calw"
alias month="gcalcli calm"
alias todo="gcalcli agenda"

Get the next three weeks

week 3

typescript

Automatic compile typescript application.

First create a make target like

.PHONY: tsc
tsc:     
    rm *build_artefacts* || true
    tsc --build tsconfig.json

Then create an alias like

alias notify='while true; do inotifywait -re modify *root_of_ts_sources' && make tsc; done'

which deletes the build artefacts if needed, and recompile the application.