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|
#! /usr/bin/env dash
# shellcheck source=/dev/null
SHELL_LIBRARY_VERSION="2.1.2" . %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"
# NAME is from the wrapper
# shellcheck disable=SC2269
NAME="$NAME"
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_adf() {
device="$1"
sides_per_page="$2"
method="ADF"
for i in $(seq "$sides_per_page"); do
do_until_success \
"scanimage --format=tiff --progress --source='$method' --device='$device' --batch=%d.tif --batch-increment='$sides_per_page' --batch-start='$i'" \
"warn 'Retrying scan, as we assume a network error!'"
if [ "$sides_per_page" -ne 1 ]; then
msg "Finished turn, please change side!"
readp "Press enter to continue" noop
fi
done
}
process_images_adf() {
tiff_temp_path="$1"
output_directory="$2"
name="$3"
counter=0
pdf_counter=0
image_cache="$(mktmp)"
while read -r scanned_image; do
dbg "$scanned_image (scanned_image) at $counter (counter)"
echo "$scanned_image" >>"$image_cache"
: $((counter += 1))
if [ "$counter" = "$number_of_pages" ]; then
dbg "$counter == $number_of_pages"
counter=0
convert_images "$image_cache" "${name}_$pdf_counter" "$output_directory"
: $((pdf_counter += 1))
printf "" >"$image_cache"
fi
done <"$(tmp_pipe fd . "$tiff_temp_path" "|" sort -V)"
}
scan_flatbed() {
device="$1"
number_of_pages"$2"
method="Flatbed"
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
}
process_images_flatbed() {
tiff_temp_path="$1"
output_directory="$2"
name="$3"
counter=0
image_cache="$(mktmp)"
while read -r scanned_image; do
echo "$scanned_image" >>"$image_cache"
: $((counter += 1))
if [ "$counter" = "$number_of_pages" ]; then
counter=0
convert_images "$image_cache" "$name" "$output_directory"
printf "" >"$image_cache"
fi
done <"$(tmp_pipe fd . "$tiff_temp_path" "|" sort -V)"
}
convert_images() {
image_cache="$1"
pdf_name="$2"
output_dir="$3"
set --
while read -r image; do
dbg "setting image: $image"
set -- "$@" "$image"
done <"$image_cache"
while [ -e "$output_dir/${pdf_name}.pdf" ]; do
pdf_name="${pdf_name}_$(tr -dc 'A-Za-z0-9' </dev/urandom | head -c 25)"
done
dbg "using pdf_name: $pdf_name"
convert "$@" -compress jpeg -quality 100 "$output_dir/${pdf_name}.pdf"
}
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 [ "$method" = "Flatbed" ]; then
scan_flatbed "$device" "$number_of_pages"
else
scan_adf "$device" "$number_of_pages"
fi
msg "Creating output directory..."
mkdir "$output_directory"
cd "$output_directory" || die "Bug"
msg "Converting images to pdfs..."
if [ "$method" = "Flatbed" ]; then
process_images_flatbed "$tiff_temp_path" "$output_directory" "$name"
else
process_images_adf "$tiff_temp_path" "$output_directory" "$name"
fi
}
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"
|
