shell script execution "framework" - centralize head&tail of a bunch of scripts & externalise context parameters

context.prop

export SRC_DATA_DIR=/home/user/source
export DEST_DATA_DIR=/home/user/destination

export DATE_EXEC=${DATE_EXEC:-$(date +%Y%m%d_%H%M%S)}
export TMP_DIR=/tmp/myscripttmpdir
export LOGS_DIR=$SCRIPT_DIR/logs

export SRC_DB_USER=user
export SRC_DB_PASSWD=password
export SRC_DB_NAME=db1

export DEST_DB_USER=user
export DEST_DB_PASSWD=password
export DEST_DB_NAME=db2

export JAVA_HOME=/usr/local/java/jdk7

end.shf

echo "End $SCRIPT_NAME : $(date +%Y%m%d_%H%M%S)"
trap - EXIT

exempleScript.sh

#!/bin/bash
export SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
export SCRIPT_NAME="Exemple"
source "$SCRIPT_DIR/init.shf"
# - - -

echo "Exemple script"
echo "$SRC_DATA_DIR -> $DEST_DATA_DIR"
echo "DB $SRC_DB_NAME -> $DEST_DB_NAME"

# - - -
source "$SCRIPT_DIR/end.shf"

init.shf

err_report() {
    echo "$(date +%Y%m%d_%H%M%S): Error occured on line $1 : $2 $3"
}
trap 'err_report $LINENO  $BASH_COMMAND $*' EXIT
set -e
export DATE_EXEC=${DATE_EXEC:-$(date +%Y%m%d_%H%M%S)}

source "$SCRIPT_DIR/context.prop"
mkdir -p $LOGS_DIR $TMP_DIR

# copy stdout/stderr to logs files
exec >  >(tee -ia $LOGS_DIR/$SCRIPT_NAME-$DATE_EXEC-out.log)
exec 2> >(tee -ia $LOGS_DIR/$SCRIPT_NAME-$DATE_EXEC-err.log >&2)

echo "Start $SCRIPT_NAME : $DATE_EXEC"