My configuration files
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__usage() {
if (($1 < $2)); then
printf 'Usage: %s %s\n' "${FUNCNAME[1]}" "$3"
return 0
fi
return 1
}
__isnumber() {
[[ $1 == ?([+-])+([0-9])?([.,]+([0-9])) ]]
}
count() { # Counts the number of characters in a string
__usage $# 1 '<string>' && return 1
printf '%d\n' "${#1}"
}
trim() { # Trims leading and trailing whitespace
__usage $# 1 '<string>' && return 1
: "${1#"${1%%[![:space:]]*}"}"
: "${_%"${_##*[![:space:]]}"}"
printf '%s\n' "$_"
}
dtl() { # Deletes the top lines of a file
__usage $# 2 '<file> <number>' && return 1
(($2 == 0)) && return
declare -a file
mapfile -O "$2" -tn 0 file < "$1"
printf '%s\n' "${file[@]}" > "$1"
}
dbl() { # Deletes the bottom lines of a file
__usage $# 2 '<file> <number>' && return 1
(($2 == 0)) && return
declare -a file
mapfile -tn 0 file < "$1"
printf '%s\n' "${file[@]:0:$((${#file[@]}-$2))}" > "$1"
}
rot13() { # Encodes/Decodes string in rot13
__usage $# 1 '<string>' && return 1
tr 'A-Za-z' 'N-ZA-Mn-za-m' <<< "$1"
}
pictshare() { # Uploads image to pictshare
__usage $# 1 '<file>' && return 1
curl -sSF "file=@$1" \
https://pictshare.net/api/upload.php | \
awk -F'"' '{gsub(/\\/,""); print $12}'
}
transh() { # Uploads file to transfer.sh
__usage $# 1 '<file> [max days] [name]' && return 1
declare file
if [ -n "${3// }" ]; then file="${3// /_}"
else : "${1%/}"; : "${_##*/}"; file="${_// /%20}"; fi
curl -Ss --upload-file "$1" -H "Max-Days: ${2:1}" \
"https://transfer.sh/$file" && printf '\n'
}
svgmin() { # Minifies and formats svg into a data URI
__usage $# 2 '< -i FILE | -s STRING >' && return 1
declare plugins tmpfile
plugins="$(svgo --show-plugins | awk '
BEGIN { printf "{" }
/cleanup|remove/ { printf c $2; c="," }
END { printf "}" }')"
tmpfile="$(mktemp svgmin.XXXXXXXX)"
svgo --enable="$plugins" "$@" --datauri=encoded -o "$tmpfile"
printf "'data:image/svg+xml;UTF8,%s'\\n" "$(<"$tmpfile")"
rm "$tmpfile"
}
tempconv() { # Converts Fahrenheit to Celsius and vice versa
__usage $# 2 '<c | f> <degree>' && return 1
if ! __isnumber "$2"; then
printf 'The second argument must be a number.\n' >&2
return 1
fi
case "$1" in
[Ff]) printf '%d \u02DAC\n' "$((($2 - 32) * 5 / 9))"; return ;;
[Cc]) printf '%d \u02DAF\n' "$(($2 * 9 / 5 + 32))"; return ;;
*) __usage 0 1 '<c | f> <degree>' && return 1
esac
}
rgb2hex() { # Converts rgb colour to hex
__usage $# 3 '<red> <green> <blue>' && return 1
printf '#%02x%02x%02x\n' "$1" "$2" "$3"
}
hex2rgb() { # Converts hex colour to rgb
__usage $# 1 '<hex>' && return 1
declare r g b
((r="16#${1:0:2}",g="16#${1:2:2}",b="16#${1:4:2}"))
printf '%s\n' "$r $g $b"
}
shuffle() { # Shuffles letters in string
__usage $# 1 '<string>' && return 1
perl -MList::Util=shuffle -F'' \
-lane 'print shuffle @F' <<< "$1"
}
cht() { # Searches cht.sh cheatsheet
__usage $# 2 '<language> <query>' && return 1
: "${*:2}"; curl -sS4 "cht.sh/$1/${_// /+})?Q"
}
weather() { # Shows weather info from wttr.in
__usage $# 1 '<place> [country]' && return 1
curl -sS4 "wttr.in/~${1}+${2:-Greece}" | head -n -2
}
sri() { # Prints the SRI hash of a resource
__usage $# 1 '<URL> [bits]' && return 1
printf 'sha%d-%s\n' "${2:-384}" \
"$(curl -Ss "$1" | shasum -ba "${2:-384}" - | xxd -r -p | base64)"
}
myip() { # What's my ip
drill myip.opendns.com @resolver1.opendns.com | awk '/^myip/{print $NF}'
}
urlencode() { # Encodes string for url
__usage $# 1 '<string>' && return 1
declare LANG=C len=${#1} char i
for ((i = 0; i < len; ++i)); do
char="${1:i:1}"
case $char in
[a-zA-Z0-9.~_-]) printf '%s' "$char" ;;
*) printf '%%%02X' "'$char" ;;
esac
done
}
urldecode() { # Decodes urlencoded string
__usage $# 1 '<string>' && return 1
printf '%b\n' "${*//%/\\x}"
}
utf8decode() { # Decodes =?UTF-8?B?...?= string
__usage $# 1 '<string>' && return 1
[[ $* =~ ^=\?[Uu][Tt][Ff]-8\?[Bb]\?([^?]+)\?=$ ]]
printf '%s\n' "$(base64 -d <<< "${BASH_REMATCH[1]}")"
}
pwned() { # Checks if a password has been compromised
__usage $# 1 '<password>' && return 1
declare pass results tmp
pass="$(printf '%s' "$1" | sha1sum | cut -d ' ' -f1)"
readarray -t results < <(curl -Ss \
https://api.pwnedpasswords.com/range/"${pass:0:5}")
for tmp in "${results[@]}"; do
[ "${tmp%:*}" != "${pass^^}" ] || printf '%s\n' "$tmp"
done
}
iso2usb() { # Writes an iso to a usb device
__usage $# 2 '<iso> <usb> [bs]' && return 1
sudo dd if="$1" of="$2" status=progress bs="${3:-4M}" oflag=sync
}
random() { # Prints a random number up to a limit
__usage $# 1 '<limit>' && return 1
printf '%s\n' "$((RANDOM % $1 + 1))"
}
# vim:fdm=syntax:fdl=0: