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#!/bin/bash
name="epub"
version="1.0"
read -r -d '' help_message <<-EOF
Dumps HTML from an epub e-book archive
Usage: epub TARGET [FILENAMES] [OPTIONS]
Options:
-d, --dump print to STDOUT
-h, --help print this message
-l, --list list HTML entries of archive
-L, --list-all list all entries of archive
-q, --quiet suppress error messages and prompts
-v, --verbose show additional messages
-V, --version print version number and exit
-w WIDTH, set width of pager
--width WIDTH
EOF
source /usr/local/lib/mylib.bash
target_archive=""
positional=()
quiet=0
verbose=0
dump=0
list=0
list_all=0
width="$(/usr/bin/tput cols)"
while [[ $# -gt 0 ]]; do
case "$1" in
-d|--dump)
debug_msg "Setting dump option to 1 (was ${dump})"
dump=1
shift
;;
-h|--help)
help_msg
shift
;;
-l|--list)
debug_msg "Setting list option to 1 (was ${list})"
list=1
shift
;;
-L|--list-all)
debug_msg "Setting list all option to 1 (was ${list_all})"
list_all=1
shift
;;
-q|--quiet)
debug_msg "Setting quiet option to 1 (was ${quiet})"
quiet=1
shift
;;
-v|--verbose)
debug_msg "Setting verbose option to 1 (was ${verbose})"
verbose=1
shift
;;
-V|--version)
version_msg
;;
-w|--width)
if ! is_positive_integer "$2"; then
error_msg "Cannot set column width to '${2}' (not an integer >= 1)"
fi
debug_msg "Setting column width to ${2} (was ${width})"
width="$2"
shift; shift
;;
*)
if [ -z "$target_archive" ]; then
debug_msg "Setting target filename to '${1}'"
target_archive="$1"
else
debug_msg "Argument '${1}' added to positional array"
positional+=("$1")
fi
shift
;;
esac
done
# error if no filenames given
if [[ -z "$target_archive" ]]; then
debug_msg "No input filename was given"
usage_msg
elif [[ ! -f "$target_archive" ]]; then
error_msg "No such file '${target_archive}'"
fi
# listing subroutine
list_target_archive() {
if ! /usr/bin/zipinfo -1 "$target_archive" 2>/dev/null; then
debug_msg "Error in listing subroutine"
code=1
fi
}
# extract subroutine
extract_from_target_archive() {
if ! /usr/bin/unzip -caaqq "$target_archive" "$target_fn"; then
code=1
fi
}
# render subroutine
render_html() {
if ! /usr/bin/w3m -T text/html -cols "$width" -dump; then
code=1
fi
}
# dump subroutine
dump_target_archive() {
if [[ "${#positional[@]}" -eq 0 ]]; then
debug_msg "Opening all HTML files within '${target_archive}'..."
for fn in "${list_fn[@]}"; do
target_fn="$fn"
debug_msg "Opening '${target_fn}'..."
extract_from_target_archive | render_html
done
else
for fn in "${positional[@]}"; do
target_fn="$fn"
debug_msg "Opening '${target_fn}'..."
extract_from_target_archive | render_html
done
fi
}
# main routine
code=0
if [[ "$list_all" -eq 1 ]]; then
list_target_archive | sort
elif [[ "$list" -eq 1 ]]; then
list_target_archive | grep -E '\.xml|\.html|\.xhtml' | sort
else
IFS=$'\n' list_fn=( $(list_target_archive | grep -E '\.xml|\.html|\.xhtml' | sort) )
if [[ "$code" -eq 1 || "${#list_fn[@]}" -eq 0 ]]; then
error_msg "'${target_archive}' is not a valid archive"
else
for target_fn in "${positional[@]}"; do
debug_msg "Opening '${target_fn}'..."
if ! contains "$target_fn" "${list_fn[@]}"; then
error_msg "'${target_fn}' not in archive '${target_archive}'"
fi
done
fi
if [[ "$dump" -eq 1 ]]; then
dump_target_archive
else
dump_target_archive | ${PAGER:=/usr/bin/less}
fi
fi
# return stored code
exit "$code"