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|
#! /usr/bin/env dash
# shellcheck source=/dev/null
SHELL_LIBRARY_VERSION="1.9.0" . %SHELL_LIBRARY_PATH
# needed for help() and version
# shellcheck disable=2034
AUTHORS="Soispha";
# shellcheck disable=2034
YEARS="2023";
# shellcheck disable=2034
VERSION="1.0.0";
help() {
cat << EOF
Scan images and turn them into a pdf.
Usage:
$NAME [OPTIONS] --name --device
OPTIONS:
--out-dir | -o [FILE]
Path to place the generated pdf files (default: ./pdf).
--name | -n NAME
Name for the pdf files (e.g. <NAME>_1.pdf).
--num-pages | -p NUM
Number of pages to merge into one pdf (default: 1).
--device | -d DEVICE
Device used for scanning.
--method | -m METHOD
Method to use for scanning (default: ADF).
--help | -h
Display this help and exit.
--version | -v
Display version and copyright information and exit.
ARGUMENTS:
FILE := [[fd . --max-depth 3]]
A name of a file to store, default is: ./pdf
NAME | * := [[fd . --max-depth 3]]
The basename of the generated files
NUM | *([0-9]) := 0 | 1 | 2 | 3 | 4
Possible numbers of pages, can be more than 4
DEVICE := [[$(cat %DEVICE_FUNCTION)]]
Possible scanner names
METHOD := ADF | Flatbed
The scanning method to use, not all scanners support both of
these. The default is ADF
EOF
}
scan() {
number_of_pages="$1";
device="$2";
output_directory="$(readlink -f "$3")";
name="$4";
method="$5";
[ -z "$number_of_pages" ] && die "Parameter 'number_of_pages' is not set!"
[ -z "$device" ] && die "Parameter 'device' is not set!"
[ -z "$output_directory" ] && die "Parameter 'output_directory' is not set!"
[ -z "$name" ] && die "Parameter 'name' is not set!"
[ -z "$method" ] && die "Parameter 'method' is not set!"
tiff_temp_path="$(mktmp -d)";
cd "$tiff_temp_path" || die "Bug"
msg "Started scanning...";
if [ "$method" = "Flatbed" ]; then
for i in $(seq "$number_of_pages"); do
do_until_success \
"scanimage --format=tiff --progress --source='$method' --device='$device' --output-file=$i.tiff" \
"warn 'Retrying scan, as we assume a network error!'"
if [ "$number_of_pages" -ne 1 ];then
msg "Finished turn, please change side!";
readp "Press enter to continue" noop
fi
done
else
for i in $(seq "$number_of_pages");do
do_until_success \
"scanimage --format=tiff --progress --source='$method' --device='$device' --batch=%d.tif --batch-increment='$number_of_pages' --batch-start='$i'" \
"warn 'Retrying scan, as we assume a network error!'"
if [ "$number_of_pages" -ne 1 ];then
msg "Finished turn, please change side!";
readp "Press enter to continue" noop
fi
done
fi
msg "Creating output directory...";
mkdir "$output_directory";
cd "$output_directory" || die "Bug"
counter=0;
image_cache="$(mktmp)"
msg "Converting images to pdfs...";
while read -r scanned_image; do
echo "$scanned_image" >> "$image_cache"
: $((counter += 1))
if [ "$counter" = "$number_of_pages" ]; then
counter=0;
process_images "$image_cache" "$name" "$output_directory"
echo "" > "$image_cache"
fi
done < "$(tmp_pipe fd . "$tiff_temp_path" "|" sort -n)"
}
process_images() {
image_cache="$1";
name="$2";
output_dir="$3";
set --
while read -r image; do
set -- "$@" "$image"
done < "$image_cache"
while [ -e "$output_dir/${name}.pdf" ]; do
name="${name}_$(tr -dc 'A-Za-z0-9!"#$%&'\''()*+,-./:;<=>?@[\]^_`{|}~' </dev/urandom | head -c 25)"
done
convert "$@" -compress jpeg -quality 100 "$output_dir/${name}.pdf"
}
for input in "$@"; do
case "$input" in
"--help" | "-h")
help;
exit 0;
;;
"--version" | "-v")
version;
exit 0;
;;
esac
done
number_of_pages="1";
unset device;
output_directory="$(pwd)/pdf";
unset name;
method="ADF";
while [ "$#" -ne 0 ]; do
case "$1" in
"--help" | "-h")
;;
"--version" | "-v")
;;
"--out-dir" | "-o")
shift 1;
output_directory="$1";
;;
"--name" | "-n")
shift 1;
name="$1";
;;
"--num-pages" | "-p")
shift 1;
number_of_pages="$1";
;;
"--device" | "-d")
shift 1;
device="$1";
;;
"--method" | "-m")
shift 1;
method="$1";
;;
*)
die "Command line arg $1 does not exist. See --help for a list.";
;;
esac
shift 1;
done
scan "$number_of_pages" "$device" "$output_directory" "$name" "$method";
|
