build-update-package: Improved and added some comments, messages and the code

Signed-off-by: Erik Alexandre Pucci <eap08@c3sl.ufpr.br>
Acked-by: Danilo Kiyoshi Simizu Yorinori <danilok@c3sl.ufpr.br>
Acked-by: Tiago Rodrigo Kepe <trk08@c3sl.ufpr.br>

build-update-package

@@ -19,35 +19,28 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 # USA.
 
-
 PREFIX="$(dirname $0)"
 
 # Get the configuration
 if ! source "${PREFIX}/buildpackage.conf" 2> /dev/null; then
-    echo "error: failed to load buildpackage.conf"
+    printf "ERROR: Failed to load buildpackage.conf.\n"
     exit 1
 fi
 
-# Customizable variables, please refer to
-# buildpackage.conf to change these values
+# Customizable variables. Please refer to buildpackage.conf to change these
+# values
 : ${AGENTDIR:="agent-files"}
 : ${AGENTPACKAGEDIR:="SEED2-run"}
 : ${UPDATEDIR:="update-files"}
 
-
 BOOTSTRAP="${PREFIX}/bootstraps/bootstrap-update"
 VERSIONFILE="${AGENTDIR}/${AGENTPACKAGEDIR}/client/conf/version"
 
 printf "====================\n"
-printf "$0 v0.1\n"
-printf "\n"
+printf "$0 v0.1\n\n"
 printf "*** Make sure ${AGENTDIR}/${AGENTPACKAGEDIR}\n"
 printf "contains the latest package generated by build-agent-files ***\n"
-printf "====================\n"
-printf "\n"
-
-
-printf "Starting build the package...\n\n"
+printf "====================\n\nStarting to build the package...\n\n"
 
 # Check the readability of version file and get the version
 if ! test -r "${VERSIONFILE}"; then
@@ -56,7 +49,13 @@ if ! test -r "${VERSIONFILE}"; then
 fi
 VERSION=$(cat ${VERSIONFILE})
 
+# Set the output file name
+OUTPUT="${UPDATEDIR}/SEED2-update-${VERSION}.run"
+
+# -----------------------------------------------------------------------------
+# Compress the agent files
 printf "Compressing SEED2-run files... "
+
 cd "${AGENTDIR}"
 TARFILE=$(tempfile --prefix=SEED2-tar)
 if ! tar -czf "${TARFILE}" SEED2-run; then
@@ -64,14 +63,23 @@ if ! tar -czf "${TARFILE}" SEED2-run; then
     exit 2
 fi
 cd - &> /dev/null
-printf " done\n"
 
-printf "Calculating MD5SUM..."
+printf "done.\n"
+# End of agent compression
+
+# -----------------------------------------------------------------------------
+# Calculate the MD5
+printf "Calculating MD5... "
+
 MD5_CHECK=$(md5sum ${TARFILE} | awk '{print $1}')
-printf " done\n\n"
 
-OUTPUT="${UPDATEDIR}/SEED2-update-${VERSION}.run"
+printf "done.\n"
+# End of MD5 calculation
+
+# -----------------------------------------------------------------------------
+# Generate the update package
 printf "Creating update .run package... "
+
 mkdir -p "${UPDATEDIR}"
 LINENUM=$(( $(wc -l "${BOOTSTRAP}" | cut -d' ' -f1) + 1 ))
 
@@ -81,8 +89,11 @@ sed "s/BOOTSTRAP_LINES=/BOOTSTRAP_LINES=${LINENUM}/g; \
      "${BOOTSTRAP}" > "${OUTPUT}"
 
 cat "${TARFILE}" >> "${OUTPUT}"
-printf "done\n"
 
+printf "done.\n"
+# End of update package generation
+
+# Remove the tar file
 rm -f "${TARFILE}"
 
-printf "All done.\n"
+printf "\nAll done.\n"