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dotfiles/functions.sh
2020-11-13 13:26:19 +01:00

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###########################
#### Function Definitions #
###########################
## Selfupdate
function dotfiles_selfupdate
{
(. $DOTFILES/check_for_update.sh && _upgrade_dotfiles)
}
## get cheat sheets for commands from cheat.sh. Usage: cheat commandname
function cheat
{
curl "https://cheat.sh/$1"
}
# get cheat sheets for commands matching $1
function cheatall
{
curl "https://cheat.sh/~$1"
}
# List all docker tags for an image
function dockertags
{
if [[ -z $(command -v jq) ]]; then
echo "jq not installed. Please install jq." 1>&2
return
fi
i=0
while [[ $? == 0 ]]; do
i=$(($i+1))
curl "https://registry.hub.docker.com/v2/repositories/library/$1/tags/?page=$i" 2>/dev/null | jq '."results"[]["name"]'
done
}
# watch with grc enabled
function watchgrc
{
watch -n 1 -c grc --colour=on "$@"
}
## Simple calculator. Usage: calc 1+1, calc 5/7, calc "sqrt(2)"
function calc
{
awk "BEGIN { print $* }"
}
## Make new directory and cd to that directory. Usage: mcd newfolder
function mcd
{
mkdir -p "$1"
cd $1
}
## Print full path of item in current directory
function ppath
{
echo "$PWD/$1"
}
## Color string with given color. Usage: color $colorname "string", available colors in colors.sh
function color
{
color=$1
set -x
shift 1
echo -e "$"$color"$@${CLEAR}\n"
set +x
}
## These functions return a colored version of the input string. Usage: red "string"
function red
{
echo -e "$Red$@$CLEAR"
}
function green
{
echo -e "$Green$@$CLEAR"
}
function blue
{
echo -e "$Blue$@$CLEAR"
}
## Flashes the screen until user presses a key
function flasher
{
while true; do printf "\e[?5h\007"; sleep 0.25; printf "\e[?5l"; read -s -n -t1 && break; done;
}
## Beep until user presses a key
function beeper
{
while true; do printf "\e[?5h\007"; sleep 0.25; printf "\e[?5l"; read -s -n -t1 && break; done;
}
## Simple http server for current directory (or path)
function httpserver
{
(
if [[ -d $1 ]]; then
cd "$1" && echo "Starting webserver in $(realpath $1)/" || echo "directory: $1 does not exist" >&2 || exit 1
else
echo "Starting webserver in $PWD/"
fi
open "http://localhost:8000" &>/dev/null &
if [[ "$(command -v python3)" ]]; then
python=python3
else
python=python
fi
$python -m http.server 8000
)
}
alias webserver='httpserver'
## Upload something using the transfer.sh service. Usage: transfer filename
function transfer
{
basefile=$(basename "$1" | sed -e 's/[^a-zA-Z0-9._-]/-/g')
out=$(curl --progress-bar --upload-file "$1" "https://transfer.sh/$basefile")
echo -e "Done, file at:\t$out"
if [[ $(uname) == "Darwin" ]]; then
echo "$out" | pbcopy
else
echo "$out"
fi
}
## If connecting through ssh and reverse forwarding port 2222 (ssh -R 2222:localhost:22 ), this function allows to copy the files back to the machine one is connecting from by typing 'mecp filename' (configure the username for "localhost" in ~/.ssh/config or add an username)
function mecp
{
rsync -r -P -e "ssh -p 2222" -R "$@" localhost:~/Desktop/
}
## generate a password using pwgen, generate_password 20 generates a 20 characters long password
function generate_password
{
pwgen -1sycn $1
}
## Generate a password from dev urandom using only printable characters
function genpwd
{
if [[ $1 ]]; then
strlen=$1
else
strlen=32
fi
# All characters excluding backlash
env LC_CTYPE=C tr -dc '[:graph]\' < /dev/urandom | fold -w $strlen | head -n 1
}
if [[ "$(uname)" == "Darwin" ]]; then
## Copy output of previous command to termbin.com (command line pastebin) and put in in clipboard
function termbin
{
nc termbin.com 9999 | pbcopy && echo -n "$(pbpaste) --> in clipboard"
}
else
## Copy output of previous command to termbin.com (command line pastebin)
function termbin
{
nc termbin.com 9999
}
fi
## List defined functions in $DOTFILES/functions.sh
function list_functions
{
grep --color=no -A 1 '^##' $DOTFILES/functions.sh | sed -E 's/function (.*)/\1/g'
}
###########################
## MAC SPECIFIC #
###########################
if [[ "$(uname)" == "Darwin" ]]; then
## Create a RAM disk. Default size 1GB. If supplied, first argument defines the RAM disk size in GB
function ramdisk
{
if [[ -e $1 ]]; then
sizeingb=$1
else
sizeingb=1
fi
# Numsectors is size in bytes / 512 (sector size in bytes)
name='RAM_disk'
sizeinbytes=$(($sizeingb*1000**3))
NUMSECTORS=$(($sizeinbytes/512))
mydev=$(hdiutil attach -nomount ram://$NUMSECTORS )
# strip whitespace (hdiutil outputs a lot of spaces/tabs along with the device name)
mydev=$(echo "$mydev"| xargs echo)
newfs_hfs "$mydev"
mkdir -p "/tmp/$name"
mount -t hfs "$mydev" "/tmp/$name"
echo "RAM Disk mounted: /tmp/$name"
echo "To eject (destroy) RAM disk, use:"
echo " $ diskutil eject $mydev"
}
## Open a pdf version of the man in Preview
function man2pdf
{
man -t "$1" | open -f -a Preview
}
## Open Man in separate (different-looking) window
function nman
{
if [ $# -eq 1 ] ; then
open "x-man-page://$1"
elif [ $# -eq 2 ] ; then
open "x-man-page://$1/$2"
fi
}
fi
### end of mac-specific functions
pipupdate(){
set -x
if [[ "$1" == "user" ]]; then
user_flags='--user'
shift
fi
if [[ -n "$@" ]]; then
pip="$1"
shift
flags="$*"
echo "pip command is: '$pip $flags'"
if ! command -v "$pip" ; then
echo "Given command ($1) does not exist." 1>&2
return
fi
else
pip='python'
flags='-m pip'
echo "Using default pip: $pip $flags"
fi
for package in $($pip $flags freeze $user_flags --local | grep -v '^\-e' | cut -d = -f 1) ; do
$pip $flags install "$user_flags" -U "$package"
done
set +x
}
# unzip file to directory with the same name of the zip file (without extension)
function unzipd {
zip_file="$1"
filename=$(basename -- "$zip_file")
extension="${filename##*.}"
name="${filename%.*}"
unzip -d "$name" "$zip_file"
}
# remove local branches which have been merged into master
function git_prune_branches(){
git branch --merged master | grep -v '^[ * ]*master$' | xargs git branch -d
}
fvim() {
if [[ -n "$@" ]]; then
vim `fzf -q $@`
else
vim `fzf`
fi
}
# dotfiles user functions
if [[ -f $HOME/.dotfiles_functions ]]; then
source "$HOME/.dotfiles_functions"
fi