On second though, shell script should not have .sh extension for simplicity

README.md

@@ -7,9 +7,9 @@ You need to have ghoscript installed on your machine.
 ```
 git clone https://gitea.auro.re/otthorn/pdf-optimize
 cd pdf-optimize
-chmod +x pdf-optimize.sh
+chmod +x pdf-optimize
 sudo mkdir -p /opt/bin/
-sudo cp pdf-optimize.sh /opt/bin/pdf-optimize
+sudo cp pdf-optimize /opt/bin/
 ```
 
 Don't forget to add `/opt/bin` to your `PATH`.

pdf-optimize

@@ -19,11 +19,18 @@ function usage
 {
     echo "usage: pdf-optimize [options] input.pdf"
     echo "    ";
+    echo "  -a | --archive          : archive mode (PDF/A)";
+    echo "  -c | --compatibility    : compability more with PDF 1.4";
+    echo "  -h | --help             : print this message";
+    echo "  -k | --quality          : choose quality profile from:
+                             * 1 HIGH QUALITY [default]
+                             * 2 LOW QUALITY
+                             * 3 AGGRESSIVE
+                             * 4 VERY AGGRESIVE";
     echo "  -o | --output           : output filename";
     echo "  -q | --quiet            : run quietly";
     echo "  -v | --verbose          : run verbosly";
     echo "  -y | --yes-to-replace   : yes to replace existing files";
-	echo "  -h | --help             : print this message";
     echo "    ";
     echo "If no output path is specified, given input.pdf as input will output
 input_compressed.pdf"
@@ -41,7 +48,10 @@ function arg_parse
 
     while [ "$1" != "" ]; do
         case "$1" in
+            -k | --quality )          quality="$2";      shift;; 
             -o | --output )           output_path="$2";  shift;;
+            -a | --archive )          archive=1;;
+            -c | --compatibility )    compatibility=1;;
             -q | --quiet )            quiet=1;;
             -v | --verbose )          verbose=1;;
             -y | --yes-to-replace )   replace=1;;
@@ -95,32 +105,36 @@ function run
 ${bold}$output_path${normal}."
     fi
 
-	# run the compression using ghostscript
-	if [[ "$verbose" != 1 ]]; then
-		ghostscript -sDEVICE=pdfwrite \
-		   -dCompatibilityLevel=1.4 \
+    # define the base command
+    base_command="
+        gs -sDEVICE=pdfwrite \
            -dPDFSETTINGS=/prepress \
            -dNOPAUSE \
-		   -dQUIET \
-		   -dBATCH \
-		   -sOutputFile=$output_path \
-		   $input_path
-	else
-		echo "input_path=$input_path";
-		echo "output_path=$output_path";
-		echo "quiet=$quiet";
-		echo "verbose=$verbose";
-		echo "replace=$replace";
-		echo "    ";
-		ghostscript -sDEVICE=pdfwrite \
-		   -dCompatibilityLevel=1.4 \
-		   -dPDFSETTINGS=/prepress \
-		   -dNOPAUSE \
-		   -dBATCH \
-		   -sOutputFile=$output_path \
-		   $input_path 
+           -dBATCH ";
+
+    # add compatibilty
+    if [[ "$compatibility" == 1 ]]; then
+        base_command+="-dCompatibilityLevel=1.4 ";
     fi
 
+    # ask ghostsript to be quiet
+    if [[ "$verbose" == 1 ]]; then
+        base_command+="-dQUIET ";
+    fi
+    
+    # add archive mode option
+    if [[ "$archive" == 1 ]]; then
+        base_command+="-dPDFA=2 -dPDFACompatibilityPolicy=1 "
+    fi
+
+    # add input and ouput paths
+    base_command+="-sOutputFile=$output_path \
+           $input_path"
+
+    # run command
+    echo $base_command;
+    #eval $base_command;
+
     # catching errors
     if [[ "$?" != 0 ]]; then
         echo "Something went wrong with ghostscript.";
@@ -130,7 +144,7 @@ ${bold}$output_path${normal}."
 
     # compute the compresion rate
     if [[ "$quiet" != 1 ]]; then
-		compute_compression;
+        #compute_compression;
     fi
 }