First set of scripts

functions_library.sh

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+##############################################################
+##############################################################
+# 
+# A SERIES OF HELPER FUNCTIONS TO HELP OUT IN 
+# HANDLING SCRIPTS THAT ARE GROWING IN COMPLEXITY
+#
+##############################################################
+##############################################################
+
+quiet_mode() {
+  # verify quiet mode
+  # returns 0 if quiet mode is enabled
+  # returns 1 otherwise
+  if [ -f /home/pi/quiet_mode ]
+  then
+    return 0
+  else
+    return 1
+  fi
+}
+
+set_quiet_mode(){
+  touch /home/pi/quiet_mode
+}
+
+unset_quiet_mode(){
+  delete_file /home/pi/quiet_mode
+}
+
+
+feedback() {
+  # first parameter is text to be displayed
+  # this sets the text color to a yellow color for visibility
+  # the last tput resets colors to default
+  # one could also set background color with setb instead of setaf
+  #http://www.tldp.org/HOWTO/Bash-Prompt-HOWTO/x405.html
+  echo -e "$(tput setaf 3)$1$(tput sgr0)"
+}
+
+#########################################################################
+#
+#  FILE EDITION
+#
+#########################################################################
+delete_line_from_file() {
+  # first parameter is the string to be matched 
+  # the lines that contain that string will get deleted
+  # second parameter is the filename
+  if [ -f $2 ]
+  then
+    sudo sed -i "/$1/d" $2
+    feedback "deleted $1 from $2"
+  fi
+}
+
+insert_before_line_in_file() {
+  # first argument is the line that needs to be inserted DO NOT USE PATHS WITH / in them
+  # second argument is a partial match of the line we need to find to insert before
+  # third arument is filename
+
+  feedback "Inserting $1 before $2 in $3"
+  if [ -f $3 ]
+  then
+    feedback "sudo sed -i '/$2/i $1' $3"
+    sudo sed -i "/$2/i $1" $3
+  fi
+}
+add_line_to_end_of_file() {
+  # first parameter is what to add
+  # second parameter is filename
+  if [ -f $2 ]
+  then
+    echo $1 >> $2
+  fi 
+}
+
+find_in_file() {
+  # first argument is what to look for
+  # second argument is the filename
+  feedback "looking for $1 in $2"
+  if grep -q "$1" $2
+  then
+    return 0
+  else
+    return 1
+  fi
+}
+
+#########################################################################
+#
+#  FILE HANDLING - detection, deletion
+#
+#########################################################################
+file_exists() {
+  # Only one argument: the file to look for
+  # returns 0 on SUCCESS
+  # returns 1 on FAIL
+  if [ -f $1 ]
+  then
+    return 0
+  else
+    return 1
+  fi
+}
+
+file_exists_in_folder(){
+  # can only be run using bash, not sh
+  # first argument: file to look for
+  # second argument: folder path
+  pushd $2
+  status = file_exists
+  popd
+  return status
+}
+
+file_does_not_exists(){
+  # Only one argument: the file to look for
+  # returns 0 on SUCCESS
+  # returns 1 on FAIL
+  feedback "looking for $1"
+  if [ ! -f $1 ]
+  then
+    feedback "not found $1"
+    return 0
+  else
+    feedback "found $1"
+    return 1
+  fi
+}
+
+delete_file (){
+  # One parameter only: the file to delete
+  if file_exists $1
+  then
+    sudo rm $1
+  fi
+}
+
+wget_file() {
+  # One parameter: the URL of the file to wget
+  # this will look if ther's already a file of the same name
+  # if there's one, it will delete it before wgetting the new one
+  # this is to avoid creating multiple files with .1, .2, .3 extensions
+  echo $1
+  # extract the filename from the provided path
+  target_file=${1##*/}
+  echo $target_file
+  delete_file $target_file
+  wget $1 --no-check-certificate
+
+
+}
+
+#########################################################################
+#
+#  FOLDER HANDLING - detection, deletion
+#
+#########################################################################
+create_folder(){
+  if ! folder_exists
+  then
+    mkdir $1
+  fi
+}
+
+folder_exists(){
+  # Only one argument: the folder to look for
+  # returns 0 on SUCCESS
+  # returns 1 on FAIL
+  if [ -d $1 ]
+  then
+    return 0
+  else
+    return 1
+  fi
+}
+
+delete_folder(){
+  if folder_exists $1
+  then
+    sudo rm -r $1
+  fi
+}

install_script_tools.sh

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+#! /bin/bash
+#####################################################################
+#####################################################################
+#
+# curl 
+#
+#####################################################################
+#####################################################################
+
+PIHOME=/home/pi
+DEXTER=Dexter
+LIB=lib
+SCRIPT=script_tools
+
+pushd $PIHOME
+result=${PWD##*/} 
+# check if ~/Dexter exists, if not create it
+if [ ! -d $DEXTER ] ; then
+	echo "creating $PIHOME/$DEXTER"
+	mkdir $DEXTER
+fi
+# go into $DEXTER
+cd $DEXTER
+echo $PWD
+
+# check if /home/pi/Dexter/lib exists, if not create it
+if [ ! -d $LIB ] ; then
+	echo "creating $PIHOME/$DEXTER/$LIB"
+	mkdir $LIB
+fi
+cd $LIB
+echo $PWD
+
+# check if /home/pi/Dexter/lib/Dexter exists, if not create it
+if [ ! -d $DEXTER ] ; then
+	echo "creating $PIHOME/$DEXTER/$LIB/$Dexter"
+	mkdir $DEXTER
+fi
+cd $DEXTER
+echo $PWD
+
+# check if /home/pi/Dexter/lib/script_tools exists
+# if yes refresh the folder
+# if not, clone the folder
+if [ -d $SCRIPT ] ; then
+	echo "Pulling"
+	cd $SCRIPT
+	echo $PWD
+	echo "now in $PIHOME/$DEXTER/$LIB/$SCRIPT"
+	sudo git pull
+else
+	# clone the folder
+	echo "Cloning"
+	sudo git clone https://github.com/DexterInd/script_tools.git
+fi
+
+popd

update_wiringpi.sh

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+#!/bin/bash
+source /home/pi/di_update/Raspbian_For_Robots/upd_script/functions_library.sh
+
+# Check if WiringPi Installed and has the latest version.  If it does, skip the step.
+# Gets the version of wiringPi installed
+version=`gpio -v`       
+
+# Parses the version to get the number
+set -- $version         
+
+# Gets the third word parsed out of the first line of gpio -v returned.
+# Should be 2.36
+WIRINGVERSIONDEC=$3     
+
+# Store to temp file
+echo $WIRINGVERSIONDEC >> tmpversion    
+
+# Remove decimals
+VERSION=$(sed 's/\.//g' tmpversion)     
+
+# Remove the temp file
+delete_file tmpversion                           
+
+feedback "wiringPi VERSION is $VERSION"
+if [ $VERSION -eq '236' ]; then
+
+	feedback "FOUND WiringPi Version 2.36 No installation needed."
+else
+	feedback "Did NOT find WiringPi Version 2.36"
+	# Check if the Dexter directory exists.
+	DIRECTORY='/home/pi/Dexter'
+	create_folder "$DIRECTORY"
+	create_folder "$DIRECTORY"/lib
+
+	# Change directories to Dexter
+	cd $DIRECTORY/lib 
+	delete_folder wiringPi	
+	# Install wiringPi
+	git clone https://github.com/DexterInd/wiringPi/  # Clone directories to Dexter.
+	cd wiringPi
+	sudo chmod +x ./build
+	sudo ./build
+	feedback "wiringPi Installed"
+fi
+# End check if WiringPi installed