dotfiles/includes/bash_functions.bash

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# Print cyan underlined header
function header() {
echo -e "$UNDERLINE$CYAN$1$NOCOLOR"
}
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# Create a new directory and enter it
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function md() {
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mkdir -p "$@" && cd "$@"
}
# cd into whatever is the forefront Finder window.
cdf() {
cd "`osascript -e 'tell app "Finder" to POSIX path of (insertion location as alias)'`"
}
# Find shorthand
function f() {
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find . -name "$1" 2>/dev/null
}
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# Quick grep: ag (+sack), ack or grep
if command -v sag >/dev/null 2>&1; then alias g="sack -ag"
elif command -v ag >/dev/null 2>&1; then alias g="ag -i"
elif command -v ack >/dev/null 2>&1; then alias g="ack -ri"
else alias g="grep -ri"; fi
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# Compare original and gzipped file size
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function gz() {
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local origsize=$(wc -c < "$1")
local gzipsize=$(gzip -c "$1" | wc -c)
local ratio=$(echo "$gzipsize * 100/ $origsize" | bc -l)
printf "Original: %d bytes\n" "$origsize"
printf "Gzipped: %d bytes (%2.2f%%)\n" "$gzipsize" "$ratio"
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}
# Test if HTTP compression (RFC 2616 + SDCH) is enabled for a given URL.
# Send a fake UA string for sites that sniff it instead of using the Accept-Encoding header. (Looking at you, ajax.googleapis.com!)
function httpcompression() {
encoding="$(curl -LIs -H 'User-Agent: Mozilla/5 Gecko' -H 'Accept-Encoding: gzip,deflate,compress,sdch' "$1" | grep '^Content-Encoding:')" && echo "$1 is encoded using ${encoding#* }" || echo "$1 is not using any encoding"
}
# Show HTTP headers for given URL
# Usage: headers <URL>
# https://github.com/rtomayko/dotfiles/blob/rtomayko/bin/headers
function headers() {
curl -sv -H "User-Agent: Mozilla/5 Gecko" "$@" 2>&1 >/dev/null |
grep -v "^\*" |
grep -v "^}" |
cut -c3-
}
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# Remove screenshots from desktop
function cleandesktop() {
header "Cleaning desktop..."
for file in ~/Desktop/Screen\ Shot*.png; do
unlink "$file"
done
echo
}
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# Extract archives of various types
function extract() {
if [ -f $1 ] ; then
local dir_name=${1%.*} # Filename without extension
case $1 in
*.tar.bz2) tar xjf $1 ;;
*.tar.gz) tar xzf $1 ;;
*.tar.xz) tar Jxvf $1 ;;
*.tar) tar xf $1 ;;
*.tbz2) tar xjf $1 ;;
*.tgz) tar xzf $1 ;;
*.bz2) bunzip2 $1 ;;
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*.rar) unrar x $1 $2 ;;
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*.gz) gunzip $1 ;;
*.zip) unzip -d$dir_name $1 ;;
*.Z) uncompress $1 ;;
*) echo "'$1' cannot be extracted via extract()" ;;
esac
else
echo "'$1' is not a valid file"
fi
}
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# Print nyan cat
# https://github.com/steckel/Git-Nyan-Graph/blob/master/nyan.sh
# If you want big animated version: `telnet miku.acm.uiuc.edu`
function nyan() {
echo
echo -en $RED'-_-_-_-_-_-_-_'
echo -e $NOCOLOR$BOLD',------,'$NOCOLOR
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echo -en $YELLOW'_-_-_-_-_-_-_-'
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echo -e $NOCOLOR$BOLD'| /\_/\\'$NOCOLOR
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echo -en $GREEN'-_-_-_-_-_-_-'
echo -e $NOCOLOR$BOLD'~|__( ^ .^)'$NOCOLOR
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echo -en $CYAN'-_-_-_-_-_-_-'
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echo -e $NOCOLOR$BOLD'"" ""'$NOCOLOR
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echo
}
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# Copy public SSH key to clipboard. Generate it if necessary
ssh-key() {
file="$HOME/.ssh/id_rsa.pub"
if [ ! -f "$file" ]; then
ssh-keygen -t rsa
fi
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cat "$file"
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}
# Create an SSH key and uploads it to the given host
# Based on https://gist.github.com/1761938
ssh-add-host() {
username=$1
hostname=$2
identifier=$3
if [[ "$identifier" == "" ]] || [[ "$username" == "" ]] || [[ "$hostname" == "" ]]; then
echo "Usage: ssh-add-host <username> <hostname> <identifier>"
else
header "Generating key..."
if [ ! -f "$HOME/.ssh/$identifier.id_rsa" ]; then
ssh-keygen -f ~/.ssh/$identifier.id_rsa -C "$USER $(date +'%Y/%m%/%d %H:%M:%S')"
fi
if ! grep -Fxiq "host $identifier" "$HOME/.ssh/config"; then
echo -e "Host $identifier\n\tHostName $hostname\n\tUser $username\n\tIdentityFile ~/.ssh/$identifier.id_rsa" >> ~/.ssh/config
fi
header "Uploading key..."
ssh $identifier 'mkdir -p .ssh && cat >> ~/.ssh/authorized_keys' < ~/.ssh/$identifier.id_rsa.pub
tput bold; ssh -o PasswordAuthentication=no $identifier true && { tput setaf 2; echo "SSH key added."; } || { tput setaf 1; echo "Failure"; }; tput sgr0
_ssh_reload_autocomplete
fi
}
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# Find files with Windows line endings (and convert then to Unix in force mode)
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# USAGE: crlf [file] [--force]
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function crlf() {
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local force=
# Single file
if [ "$1" != "" ] && [ "$1" != "--force" ]; then
[ "$2" == "--force" ] && force=1 || force=0
_crlf_file $1 $force
return
fi
# All files
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[ "$1" == "--force" ] && force=1 || force=0
for file in $(find . -type f -not -path "*/.git/*" -not -path "*/node_modules/*" | xargs file | grep ASCII | cut -d: -f1); do
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_crlf_file $file $force
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done
}
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function _crlf_file() {
grep -q $'\x0D' "$1" && echo "$1" && [ $2 ] && dos2unix "$1"
}
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function git-work()
{
if [ -s ~/.gitlocal ]; then
unlink ~/.gitlocal
fi
ln -s ~/.gitlocal_work ~/.gitlocal
}
function git-private()
{
if [ -s ~/.gitlocal ]; then
unlink ~/.gitlocal
fi
ln -s ~/.gitlocal_private ~/.gitlocal
}
# Add special aliases that will copy result to clipboard (escape → escape+)
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for cmd in password hex2hsl hex2rgb escape codepoint ssh-key myip; do
eval "function $cmd+() { $cmd \$@ | c; }"
done