Update my utility script

home/.local/bin/hari-tools.sh

@@ -1,6 +1,24 @@
 #!/usr/bin/env bash
 
-# Open space separated list of ssh logins in separate tabs ( using gnome-terminal )
+THIS_DIR=$(dirname $(readlink -f $0))
+THIS_FILE=$0
+# Maximum allowed length of function name. longer names will break tabular display
+MAX_FN_NAME_LEN=30
+# Maximum number of documentation lines
+MAX_DOC_LINES=3
+
+# list all available commands
+list-commands(){
+  typeset -F | cut -d ' ' -f 3 | grep -v '^_' | sort
+}
+
+# list available fonts for a language.
+# Usage: THIS_FN <lang_code>
+fonts_for_lang(){
+  fc-list :lang=$1
+}
+
+# Open many ssh sessions in separate tabs in gnome-terminal
 sshInTabs(){
   logins="$@"
   for i in $logins; do
@@ -10,44 +28,186 @@ sshInTabs(){
 
 # Edit this file
 edit(){
-  vim ~/.local/bin/hari-tools.sh
+  ${EDITOR:-vim} "$THIS_FILE"
 }
 
-## Convert text to wav
+
+# convert text to 8k 1ch wav
 genSound(){  echo $1 | espeak --stdout | ffmpeg -i - -ar 8000 -y $2.wav ; }
 
-# Clear sysrq keys which messing up with Window manager after switching to "raw mode"
+
+# Clear SysRq-r if enabled
 clearSysRq(){
 	sudo kbd_mode -s -C /dev/tty7
 }
 
-# Show my public IP
+# Print current public ip using ipify API
 myIp(){
 	curl 'https://api.ipify.org?format=json'
 }
 
-#Create VMDK virtual disk from actual block devices
+# Detach existing connection from Bonding
+detachFromBond(){
+  conn=$1
+  nmcli connection modify $conn connection.master "" connection.slave-type ""
+}
+
+# Attach existing connection to A bonding interface
+attachToBond(){
+  bond=$1 # Device name
+  conn=$2
+  nmcli connection modify "$conn" master $bond
+}
+
+# Generate ssh config entry for each line in csv file.
+# arg1 => common suffix for all hosts
+# column-1 => host, column-2 => ip
+sshConfig(){
+  suff=${1:-local}
+    lst=$(cat /dev/stdin | sed 's/"//g');
+    for line in $lst; do
+        cols=(${line//,/ })
+        ip=${cols[1]};
+        host=${cols[0]};
+        cat<<EOF
+Host ${host}.$suff
+	HostName $ip
+	User root
+EOF
+    done
+}
+
+
+# create vmdk disk for a block device
 block_dev_to_vmdk(){
   [ -z "$2" ] && echo 'block_dev_to_vmdk <path/to/block_dev> <path/to/vmdk>' && exit 1
   VBoxManage internalcommands createrawvmdk -filename $2 -rawdisk $1
 }
 
-# Print sha256 fignerprint of ssh public keys
-sshsha256(){ awk '{print $2}' $1 | base64 -d | sha256sum -b | awk '{print $1}' | xxd -r -p | base64 ; }
+# Decode sha256 id shown in ssh log 
+ssh-sha256-decode(){ awk '{print $2}' $1 | base64 -d | sha256sum -b | awk '{print $1}' | xxd -r -p | base64 ; }
 
+# Git clone project into Downloads directory, and keep copy of the same as archive
+githubdl(){
+  cd ~/Downloads
+  git clone $1
+  projName=$(basename $1)
+  projName=${projName%.*}
+  mksquashfs ./$projName $projName.sqfs
+}
+
+# Uniq command awk version
+uniq(){
+  awk '!array[$0]++'
+}
+
+# Convert video webm format ( optional 2 pass encoding )
+video_to_webm(){
+  src="$(readlink -f "$1")"
+  dest="$(readlink -f "$2")"
+  deadline=good
+  cpu_param='--cpu-used=16'
+  CODEC=${CODEC:-vp8}
+  framesCount=$(ffmpeg -i "$src" -vcodec copy -acodec copy -f null /dev/null 2>&1 | grep 'frame=' | sed 's/frame= *\([0-9]*\).*/\1/' )
+  echo "Frames count = $framesCount . If speed=10 fps, it will take $( python -S -c 'print("%2.2f" % ('$framesCount'/10.0/60))' ) minutes"
+  if [[ -z "$TWOPASS" ]]; then
+    ffmpeg -i "$src"  -f yuv4mpegpipe - 2>/dev/null | vpxenc ${cpu_param} --codec=$CODEC -p 1 --${deadline} -o "$dest" /dev/stdin
+  else
+    pass1File=./video_to_webm_$(date +%s).log
+    ffmpeg -i "$src"  -f yuv4mpegpipe - 2>/dev/null | vpxenc ${cpu_param} --codec=$CODEC -p 2 --${deadline} -o "$dest" --fpf="$pass1File" --pass=1 /dev/stdin
+    ffmpeg -i "$src"  -f yuv4mpegpipe - 2>/dev/null | vpxenc ${cpu_param} --codec=$CODEC -p 2 --${deadline} -o "$dest" --fpf="$pass1File" --pass=2 /dev/stdin
+    rm $pass1File
+  fi
+}
+
+# Record desktop to h264 mp4 using ffmpeg
+record_desktop(){
+  ffmpeg -vaapi_device /dev/dri/renderD128 -f x11grab -draw_mouse 1 -video_size 1600x900 \
+  -i :0  -f alsa -ac 2 -i hw:0,0 -vf 'hwupload,scale_vaapi=format=nv12' -c:v h264_vaapi -qp 32 ~/Videos/myscreencast-$(date +%F_%T).mp4
+}
 
-# Print all available commands if none was provided in commandline 
+
+
+# Bulk replace string in all files in the directory
+bulk_replace(){
+  old=$1
+  new=$2
+  ag -l "$old" | xargs -l sed -i "s/${old}/${new}/g"
+  # ag -l "$old"
+}
+
+
+# Import csv file into postgres table by autogenerating table and column names
+psql_csv_table(){
+  local db=$1
+  shift
+  local src=$1
+  shift
+  if [[ -z "$src" || -z "$db" ]]; then
+    echo "$0 <db> <csv file>";
+    exit
+  fi
+
+
+  local tbl=$(basename $src)
+  tbl="${tbl%.*}"
+  local cols=$( head -n1 $src )
+  # cat<<EOF
+  cat<<EOF | psql "$@" $db
+  DROP TABLE IF EXISTS "$tbl";
+  CREATE TABLE "$tbl" (
+     $( echo $cols | sed -E -e 's/([^,]*)/\1 text/g' )
+  );
+EOF
+  cat "$src" | psql "$@" $db -c "COPY  \"$tbl\"( $( echo $cols | sed -E -e "s/'/\"/g" -e  's/([^,]*)/\1/g' ) ) FROM STDIN   CSV HEADER"
+}
+
+# Swap two files
+swap() {
+  local TMPFILE=tmp.$$;
+  mv "$1" $TMPFILE;
+  mv "$2" "$1";
+  mv $TMPFILE "$2";
+}
+
+# Reload kwin Compositor
+kwinCompositorReload(){
+  qdbus-qt5 org.kde.KWin /Compositor suspend
+  qdbus-qt5 org.kde.KWin /Compositor resume
+}
+
+
+
+# Setup autocomplete. run eval "$(THIS_FILE setup-autocomplete)"
+setup-autocomplete(){
+  cat<<EOF
+_complete_hdutils(){
+  saveIFS=\$IFS
+  IFS=\$'\n'
+  case \$COMP_CWORD in
+    1)
+      COMPREPLY=( \$( compgen -W "\$( $THIS_FILE list-commands )" -- "\${COMP_WORDS[COMP_CWORD]}") )
+      ;;
+    *)
+      COMPREPLY=( \$( compgen -o default -- "\${COMP_WORDS[COMP_CWORD]}") )
+      ;;
+  esac
+  IFS="\$saveIFS"
+  return 0
+}
+complete -F _complete_hdutils $THIS_FILE
+EOF
+}
 
 cmd=$1
 shift
-allFunctions=$(typeset -F | cut -d ' ' -f 3 | grep -v '^_' | tr '\n' ' ' )
+allFunctions=$(list-commands | tr '\n' ' ')
 if [ -n "$cmd" ] && [[ " $allFunctions " =~ " $cmd " ]]; then
     $cmd "$@"
 else
   cat<<EOF
 Available commands:
-	$(echo $allFunctions | sed 's/ /\n\t/g' | sort )
+$( list-commands | xargs -I@@ bash -c 'tabs '$MAX_FN_NAME_LEN'; \
+echo -en @@\\t; grep -B'$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;" ' )
 EOF
 fi
-
-