otthorn/pdf-optimize
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On second though, shell script should not have .sh extension for simplicity

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otthorn 2021-02-16 00:45:26 +01:00
parent d6c84c7429
commit 249eb79fc9
2 changed files with 114 additions and 100 deletions
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4
README.md
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@ -7,9 +7,9 @@ You need to have ghoscript installed on your machine.
``` ```
git clone https://gitea.auro.re/otthorn/pdf-optimize git clone https://gitea.auro.re/otthorn/pdf-optimize
cd pdf-optimize cd pdf-optimize
chmod +x pdf-optimize.sh chmod +x pdf-optimize
sudo mkdir -p /opt/bin/ 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`. Don't forget to add `/opt/bin` to your `PATH`.

210
pdf-optimize
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@ -17,132 +17,146 @@
function usage function usage
{ {
echo "usage: pdf-optimize [options] input.pdf" echo "usage: pdf-optimize [options] input.pdf"
echo " "; echo " ";
echo " -o | --output : output filename"; echo " -a | --archive : archive mode (PDF/A)";
echo " -q | --quiet : run quietly"; echo " -c | --compatibility : compability more with PDF 1.4";
echo " -v | --verbose : run verbosly"; echo " -h | --help : print this message";
echo " -y | --yes-to-replace : yes to replace existing files"; echo " -k | --quality : choose quality profile from:
echo " -h | --help : print this message"; * 1 HIGH QUALITY [default]
echo " "; * 2 LOW QUALITY
echo "If no output path is specified, given input.pdf as input will output * 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 " ";
echo "If no output path is specified, given input.pdf as input will output
input_compressed.pdf" input_compressed.pdf"
} }
function arg_parse function arg_parse
{ {
# if no argument is given print help # if no argument is given print help
if [[ -z "$1" ]]; then if [[ -z "$1" ]]; then
usage; exit; usage; exit;
fi fi
# positional arguments # positional arguments
args=() args=()
while [ "$1" != "" ]; do while [ "$1" != "" ]; do
case "$1" in case "$1" in
-o | --output ) output_path="$2"; shift;; -k | --quality ) quality="$2"; shift;;
-q | --quiet ) quiet=1;; -o | --output ) output_path="$2"; shift;;
-v | --verbose ) verbose=1;; -a | --archive ) archive=1;;
-y | --yes-to-replace ) replace=1;; -c | --compatibility ) compatibility=1;;
-h | --help ) usage; exit;; -q | --quiet ) quiet=1;;
* ) args+=("$1") -v | --verbose ) verbose=1;;
esac -y | --yes-to-replace ) replace=1;;
shift -h | --help ) usage; exit;;
done * ) args+=("$1")
esac
shift
done
# restore positional argument # restore positional argument
set -- "${args[@]}" set -- "${args[@]}"
# only the first one should be used # only the first one should be used
input_path="${args[0]}" input_path="${args[0]}"
# add default output path if none is given # add default output path if none is given
if [[ -z "$output_path" ]]; then if [[ -z "$output_path" ]]; then
output_path="${input_path%.*}_compressed.pdf"; output_path="${input_path%.*}_compressed.pdf";
fi fi
# check if the output file already exists before writting to it # check if the output file already exists before writting to it
if [[ -f "$output_path" && "$replace" == 0 ]]; then if [[ -f "$output_path" && "$replace" == 0 ]]; then
yes_or_no "$output_path already exists, do you want to replace it?" || yes_or_no "$output_path already exists, do you want to replace it?" ||
exit 1; exit 1;
fi fi
# check if the input file exists # check if the input file exists
if [[ ! -f "$input_path" ]]; then if [[ ! -f "$input_path" ]]; then
echo "$input_path does not exist." echo "$input_path does not exist."
echo "Aborting"; echo "Aborting";
exit 1; exit 1;
fi fi
} }
function yes_or_no function yes_or_no
{ {
read -p "$* [y/N]: " ans read -p "$* [y/N]: " ans
case "$ans" in case "$ans" in
[yY] | [yY]es ) return 0;; [yY] | [yY]es ) return 0;;
* ) echo "Aborting"; return 1;; * ) echo "Aborting"; return 1;;
esac esac
} }
function run function run
{ {
arg_parse "$@"; arg_parse "$@";
# print general information # print general information
if [[ "$quiet" != 1 ]]; then if [[ "$quiet" != 1 ]]; then
echo "Compressing from ${bold}$input_path${normal} into \ echo "Compressing from ${bold}$input_path${normal} into \
${bold}$output_path${normal}." ${bold}$output_path${normal}."
fi fi
# run the compression using ghostscript # define the base command
if [[ "$verbose" != 1 ]]; then base_command="
ghostscript -sDEVICE=pdfwrite \ gs -sDEVICE=pdfwrite \
-dCompatibilityLevel=1.4 \ -dPDFSETTINGS=/prepress \
-dPDFSETTINGS=/prepress \ -dNOPAUSE \
-dNOPAUSE \ -dBATCH ";
-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 \
$input_path
fi
# catching errors
if [[ "$?" != 0 ]]; then
echo "Something went wrong with ghostscript.";
echo "Aborting.";
exit 1;
fi
# compute the compresion rate # add compatibilty
if [[ "$quiet" != 1 ]]; then if [[ "$compatibility" == 1 ]]; then
compute_compression; base_command+="-dCompatibilityLevel=1.4 ";
fi 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.";
echo "Aborting.";
exit 1;
fi
# compute the compresion rate
if [[ "$quiet" != 1 ]]; then
#compute_compression;
fi
} }
function compute_compression function compute_compression
{ {
input_size=`du "$input_path" | cut -f1` input_size=`du "$input_path" | cut -f1`
output_size=`du "$output_path" | cut -f1` output_size=`du "$output_path" | cut -f1`
percentage=`echo "scale=1;$output_size / $input_size * 100" | bc -l` percentage=`echo "scale=1;$output_size / $input_size * 100" | bc -l`
input_size_h=`du -h "$input_path" | cut -f1` input_size_h=`du -h "$input_path" | cut -f1`
output_size_h=`du -h "$output_path" | cut -f1` output_size_h=`du -h "$output_path" | cut -f1`
echo "Size reduced from ${bold}$input_size_h${normal} to \ echo "Size reduced from ${bold}$input_size_h${normal} to \
${bold}$output_size_h${normal} [$percentage %]" ${bold}$output_size_h${normal} [$percentage %]"
} }