Reworked the buildpdf script

buildpdf/buildpdf.sh

@@ -2,31 +2,107 @@
 # A script for automatically creating PDf files from a latex document
 # You can set the amounts of builds and the time between these builds
 # Usage: ./buildpdf.sh filename [build amount] [time between builds in s]
-# Marcel Michael Kapfer
-# 6th January 2015
+# Marcel Michael Kapfer (mmk2410)
+# 6th January 2015 - 2017
 # GNU GPL v3.0 -> Feel free to re-distribute it or fork it
-if [[ -z "$1" ]]; then
-	echo "Usage: ./buildpdf.sh filename [build amount] [time between builds in s]"
-	exit 1
+
+print() {
+
+    local text="$1"
+
+    date "+[%F %T] $text"
+}
+
+run() {
+
+    local filename="$1"
+    local number="$2"
+
+    pdflatex "$filename" > /dev/null 2>&1
+    print "Build $number ready"
+    
+}
+
+
+build() {
+
+    local filename="$1"
+    local builds="$2"
+    local sleeptime="$3"
+    local i="1"
+
+    while [[ "$i" -le "$builds" ]]; do
+
+	run "$filename" "$i"
+
+	if [[ "$i" -lt "$builds" ]]; then
+	    print "Waiting $sleeptime seconds - then build again"
+	    sleep "$sleeptime"
 	else
-	filename=$1
+	    print "Jobs done. Exiting now..."
 	fi
+
+	((++i))
+
+    done
+
+}
+
+build_infty() {
+
+    local filename="$1"
+    local builds="1"
+    local sleeptime="$2"
+
+    while : ; do
+
+	run "$filename" "$builds"
+
+	print "Waiting $sleeptime seconds - then build again"
+	sleep "$sleeptime"
+
+	((++builds))
+
+    done
+
+}
+
+main() {
+
+    if [[ -z "$1" || "$1" == "--help" || "$1" == "-h" ]]; then
+	cat <<EOF
+Usage: buildpdf.sh filename [build amount] [sleep time]
+
+Options:
+  build amount: how many times the pdf should be created.
+    Leave empty or set to '0' for infinity builds.
+
+  sleep time: time in seconds between the builds.
+    Leave empty will create the pdf every 120 seconds.
+EOF
+	exit
+    else
+	filename="$1"
+    fi	
+
     if [[ -z "$2" ]]; then
-	builds=1
+	builds=0
     else
-	builds=$2
+	builds="$2"
     fi
+
     if [[ -z "$3" ]]; then
 	sleeptime=120
     else
-	sleeptime=$3
+	sleeptime="$3"
     fi
-for ((i=1; i<=$builds; ++i)) ;
-do
-	pdflatex $filename
-	echo "Build $i ready"
-	if (( i < builds )); then
-		echo "Waiting $sleeptime seconds - then build again"
-		sleep $sleeptime
+
+    if [[ "$builds" == 0 ]]; then
+	build_infty "$filename" "$sleeptime"
+    else
+	build "$filename" "$builds"  "$sleeptime"
     fi
-done
+
+}
+
+main "$@"