mirror of https://github.com/harish2704/dotFiles
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#!/usr/bin/env bash |
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THIS_DIR=$(dirname $(readlink -f $0)) |
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THIS_FILE=$0 |
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# Maximum allowed length of function name. longer names will break tabular display |
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MAX_FN_NAME_LEN=30 |
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# Maximum number of documentation lines |
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MAX_DOC_LINES=3 |
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# list all available commands |
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list-commands(){ |
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typeset -F | cut -d ' ' -f 3 | grep -v '^_' | sort |
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} |
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# list available fonts for a language. |
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# Usage: THIS_FN <lang_code> |
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fonts_for_lang(){ |
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fc-list :lang=$1 |
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} |
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# Open many ssh sessions in separate tabs in gnome-terminal |
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sshInTabs(){ |
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logins="$@" |
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for i in $logins; do |
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gnome-terminal --tab -- bash -c "retry=y; while [ \"\$retry\" = 'y' ]; do ssh $i; echo \'Retry? y/n \(n\) ?\'; read retry; done;"; |
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done |
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} |
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# Edit this file |
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edit(){ |
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${EDITOR:-vim} "$THIS_FILE" |
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} |
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# convert text to 8k 1ch wav |
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genSound(){ echo $1 | espeak --stdout | ffmpeg -i - -ar 8000 -y $2.wav ; } |
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# Clear SysRq-r if enabled |
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clearSysRq(){ |
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sudo kbd_mode -s -C /dev/tty7 |
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} |
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# Print current public ip using ipify API |
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myIp(){ |
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curl 'https://api.ipify.org?format=json' |
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} |
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# Detach existing connection from Bonding |
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detachFromBond(){ |
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conn=$1 |
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nmcli connection modify $conn connection.master "" connection.slave-type "" |
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} |
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# Attach existing connection to A bonding interface |
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attachToBond(){ |
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bond=$1 # Device name |
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conn=$2 |
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nmcli connection modify "$conn" master $bond |
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} |
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# Generate ssh config entry for each line in csv file. |
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# arg1 => common suffix for all hosts |
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# column-1 => host, column-2 => ip |
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sshConfig(){ |
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suff=${1:-local} |
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lst=$(cat /dev/stdin | sed 's/"//g'); |
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for line in $lst; do |
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cols=(${line//,/ }) |
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ip=${cols[1]}; |
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host=${cols[0]}; |
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cat<<EOF |
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Host ${host}.$suff |
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HostName $ip |
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User root |
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EOF |
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done |
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} |
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# create vmdk disk for a block device |
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block_dev_to_vmdk(){ |
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[ -z "$2" ] && echo 'block_dev_to_vmdk <path/to/block_dev> <path/to/vmdk>' && exit 1 |
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VBoxManage internalcommands createrawvmdk -filename $2 -rawdisk $1 |
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} |
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# Decode sha256 id shown in ssh log |
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ssh-sha256-decode(){ awk '{print $2}' $1 | base64 -d | sha256sum -b | awk '{print $1}' | xxd -r -p | base64 ; } |
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# Git clone project into Downloads directory, and keep copy of the same as archive |
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githubdl(){ |
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cd ~/Downloads |
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git clone $1 |
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projName=$(basename $1) |
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projName=${projName%.*} |
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mksquashfs ./$projName $projName.sqfs |
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} |
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# Uniq command awk version |
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uniq(){ |
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awk '!array[$0]++' |
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} |
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# Convert video webm format ( optional 2 pass encoding ) |
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video_to_webm(){ |
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src="$(readlink -f "$1")" |
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dest="$(readlink -f "$2")" |
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deadline=good |
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cpu_param='--cpu-used=16' |
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CODEC=${CODEC:-vp8} |
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framesCount=$(ffmpeg -i "$src" -vcodec copy -acodec copy -f null /dev/null 2>&1 | grep 'frame=' | sed 's/frame= *\([0-9]*\).*/\1/' ) |
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echo "Frames count = $framesCount . If speed=10 fps, it will take $( python -S -c 'print("%2.2f" % ('$framesCount'/10.0/60))' ) minutes" |
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if [[ -z "$TWOPASS" ]]; then |
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ffmpeg -i "$src" -f yuv4mpegpipe - 2>/dev/null | vpxenc ${cpu_param} --codec=$CODEC -p 1 --${deadline} -o "$dest" /dev/stdin |
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else |
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pass1File=./video_to_webm_$(date +%s).log |
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ffmpeg -i "$src" -f yuv4mpegpipe - 2>/dev/null | vpxenc ${cpu_param} --codec=$CODEC -p 2 --${deadline} -o "$dest" --fpf="$pass1File" --pass=1 /dev/stdin |
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ffmpeg -i "$src" -f yuv4mpegpipe - 2>/dev/null | vpxenc ${cpu_param} --codec=$CODEC -p 2 --${deadline} -o "$dest" --fpf="$pass1File" --pass=2 /dev/stdin |
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rm $pass1File |
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fi |
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} |
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# Record desktop to h264 mp4 using ffmpeg |
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record_desktop(){ |
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ffmpeg -vaapi_device /dev/dri/renderD128 -f x11grab -draw_mouse 1 -video_size 1600x900 \ |
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-i :0 -f alsa -ac 2 -i hw:0,0 -vf 'hwupload,scale_vaapi=format=nv12' -c:v h264_vaapi -qp 32 ~/Videos/myscreencast-$(date +%F_%T).mp4 |
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} |
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# Bulk replace string in all files in the directory |
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bulk_replace(){ |
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old=$1 |
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new=$2 |
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ag -l "$old" | xargs -l sed -i "s/${old}/${new}/g" |
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# ag -l "$old" |
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} |
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# Import csv file into postgres table by autogenerating table and column names |
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psql_csv_table(){ |
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local db=$1 |
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shift |
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local src=$1 |
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shift |
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if [[ -z "$src" || -z "$db" ]]; then |
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echo "$0 <db> <csv file>"; |
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exit |
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fi |
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local tbl=$(basename $src) |
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tbl="${tbl%.*}" |
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local cols=$( head -n1 $src ) |
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# cat<<EOF |
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cat<<EOF | psql "$@" $db |
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DROP TABLE IF EXISTS "$tbl"; |
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CREATE TABLE "$tbl" ( |
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$( echo $cols | sed -E -e 's/([^,]*)/\1 text/g' ) |
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); |
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EOF |
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cat "$src" | psql "$@" $db -c "COPY \"$tbl\"( $( echo $cols | sed -E -e "s/'/\"/g" -e 's/([^,]*)/\1/g' ) ) FROM STDIN CSV HEADER" |
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} |
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# Swap two files |
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swap() { |
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local TMPFILE=tmp.$$; |
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mv "$1" $TMPFILE; |
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mv "$2" "$1"; |
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mv $TMPFILE "$2"; |
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} |
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# Reload kwin Compositor |
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kwinCompositorReload(){ |
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qdbus-qt5 org.kde.KWin /Compositor suspend |
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qdbus-qt5 org.kde.KWin /Compositor resume |
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} |
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# Setup autocomplete. run eval "$(THIS_FILE setup-autocomplete)" |
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setup-autocomplete(){ |
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cat<<EOF |
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_complete_hdutils(){ |
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saveIFS=\$IFS |
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IFS=\$'\n' |
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case \$COMP_CWORD in |
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1) |
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COMPREPLY=( \$( compgen -W "\$( $THIS_FILE list-commands )" -- "\${COMP_WORDS[COMP_CWORD]}") ) |
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;; |
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*) |
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COMPREPLY=( \$( compgen -o default -- "\${COMP_WORDS[COMP_CWORD]}") ) |
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;; |
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esac |
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IFS="\$saveIFS" |
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return 0 |
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} |
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complete -F _complete_hdutils $THIS_FILE |
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EOF |
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} |
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cmd=$1 |
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shift |
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allFunctions=$(list-commands | tr '\n' ' ') |
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if [ -n "$cmd" ] && [[ " $allFunctions " =~ " $cmd " ]]; then |
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$cmd "$@" |
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else |
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cat<<EOF |
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Available commands: |
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$( list-commands | xargs -I@@ bash -c 'tabs '$MAX_FN_NAME_LEN'; \ |
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echo -en @@\\t; grep -B'$MAX_DOC_LINES' -A0 @@\(\) '$THIS_FILE' | grep "^#" | sed "s#THIS_FILE#'$THIS_FILE'#g; s#THIS_FN#@@#g;" | sed ":a; N; \$!ba; s/\n/\n\t/g;" ' ) |
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EOF |
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fi |
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