Make changes according to shellcheck
This commit is contained in:
Björn Busse
parent
761e2a3801
commit
d0af6bf2e4
156
xkcdlock
156
xkcdlock
@ -28,7 +28,7 @@
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[[ "$TRACE" ]] && set -x
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set -eo pipefail
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readonly SCRIPT_NAME=$(basename $0)
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readonly SCRIPT_NAME=$(basename "$0")
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# screensaver executable
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LOCK_BIN="swaylock"
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@ -58,7 +58,6 @@ FONT_PATH="${HOME}/.local/share/fonts/${FONT_FILE}"
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URL_FONT="https://github.com/ipython/xkcd-font/raw/master/xkcd-script/font/xkcd-script.ttf"
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declare -a DEPS=("xrandr" "awk" "curl" "convert" "fold" "recode" "sed")
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declare -a DEPS_LOCKER=("i3lock" "swaylock")
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DOWNLOAD_DISCLAIMER="\nThe downloaded images will end up in your current working directory.\n\
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Since we are using restricted bash, we can not change path.\n\
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@ -69,21 +68,21 @@ log() {
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echo "$@" >&2
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fi
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logger -p user.notice -t $SCRIPT_NAME "$@"
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logger -p user.notice -t "$SCRIPT_NAME" "$@"
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}
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error() {
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echo "$@" >&2
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logger -p user.error -t $SCRIPT_NAME "$@"
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logger -p user.error -t "$SCRIPT_NAME" "$@"
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}
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# does not work with restricted bash (bash -r/rbash)
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get_script_path() {
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echo $(dirname $(readlink -f $0))
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dirname "$(readlink -f "$0")"
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}
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show_help() {
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printf "\n xkcdlock ${VERSION}\n\n\
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printf "\n xkcdlock %s\n\n\
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Available options are:\n\n \
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-d Download images to current working directory\n \
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-h Show this help\n \
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@ -91,11 +90,11 @@ show_help() {
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-l Lock program: one of i3lock/swaylock\n \
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-m Mode: latest | random default: random\n \
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-v Be verbose\n \
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-V Show version\n\n"
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-V Show version\n\n" ${VERSION}
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}
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show_version() {
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printf "\n xkcdlock ${VERSION}\n\n"
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printf "\n xkcdlock %s\n\n" ${VERSION}
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}
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@ -118,7 +117,8 @@ check_dependencies() {
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xkcd_get_latest_image() {
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log "Looking for latest image"
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local img_url=$(curl -s https://xkcd.com/index.html | \
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local img_url
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img_url=$(curl -s https://xkcd.com/index.html | \
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awk '/Image URL \(for hotlinking\/embedding\): / {print $5}' | \
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awk 'BEGIN{FS="<";} {print $1}')
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@ -127,13 +127,14 @@ xkcd_get_latest_image() {
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local img_fn="${IMG_DEFAULT}"
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else
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log "Downloading: $img_url"
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curl -sO --max-time 6 "$img_url"
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if [[ 0="$?" ]]; then
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local img_fn=$(echo "$img_url" | awk 'BEGIN{FS="/";} {print $5}')
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if curl -sO --max-time 6 "$img_url"; then
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local img_fn
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img_fn=$(echo "$img_url" | awk 'BEGIN{FS="/";} {print $5}')
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else
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error "Can not download latest image, using fallback image"
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local img_fn="${IMG_DEFAULT}"
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local img_fn
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img_fn="${IMG_DEFAULT}"
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fi
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fi
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@ -141,7 +142,8 @@ xkcd_get_latest_image() {
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}
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xkcd_get_img_name() {
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local fn=$(echo "$img_url_hotlink" | awk 'BEGIN{FS="/";} {print $5}')
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local fn
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fn=$(echo "$img_url_hotlink" | awk 'BEGIN{FS="/";} {print $5}')
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IFS='.' read -r -a array <<< "${fn}"
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fn="${array[0]}"_"${i}"."${array[-1]}"
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echo "$fn"
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@ -164,7 +166,8 @@ xkcd_get_img_nr() {
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xkcd_get_all_images() {
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VERBOSE="1"
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log "Looking for latest image"
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local nimg_latest=$(curl -s https://xkcd.com/index.html | \
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local nimg_latest
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nimg_latest=$(curl -s https://xkcd.com/index.html | \
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awk '/Permanent link to this comic: / {print $6}' | \
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awk 'BEGIN{FS="/";} {print $4}')
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@ -176,9 +179,11 @@ xkcd_get_all_images() {
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log "Found: $nimg_latest"
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fi
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for ((i=1; i<=$nimg_latest; i++)); do
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local img_url_hotlink=$(xkcd_get_hotlink_url $i)
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local img_name=$(xkcd_get_img_name $img_url_hotlink $i)
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for ((i=1; i<=nimg_latest; i++)); do
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local img_url_hotlink
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img_url_hotlink=$(xkcd_get_hotlink_url "$i")
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local img_name
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img_name=$(xkcd_get_img_name "$img_url_hotlink" "$i")
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if [[ -e "$img_name" ]]; then
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log "$img_name exists. Skipping download"
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@ -186,13 +191,12 @@ xkcd_get_all_images() {
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fi
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log "Downloading #${i} ${img_url_hotlink} (${img_name})"
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$(curl -s $img_url_hotlink -o $img_name)
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if (( 0 != "$?" )); then
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if ! curl -s "$img_url_hotlink" -o "$img_name"; then
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error "Failed to download ${i}"
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fi
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if [ "${img_name: -3}" == "jpg" ]; then
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convert_image $img_name
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convert_image "$img_name"
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fi
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done
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@ -201,41 +205,48 @@ xkcd_get_all_images() {
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xkcd_get_hotlink_url() {
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local url="https://xkcd.com/$i"
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local url_hotlink="$(curl -sL $url | awk '/Image URL \(for hotlinking\/embedding\): / {print $5}')"
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echo $url_hotlink
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local url_hotlink
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url_hotlink="$(curl -sL $url | awk '/Image URL \(for hotlinking\/embedding\): / {print $5}')"
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echo "$url_hotlink"
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}
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xkcd_get_img_tooltip() {
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local url="https://xkcd.com/$1"
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echo $(curl -sL $url | grep -A 1 '<div id=\"comic\">' | awk -F "\"" '/src=/ {print $4}' | recode html..UTF8)
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local url
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url="https://xkcd.com/$1"
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curl -sL "$url" | grep -A 1 '<div id=\"comic\">' | awk -F "\"" '/src=/ {print $4}' | recode html..UTF8
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}
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xkcd_format_tooltip() {
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local text=$(echo $text | fold -s -w $TOOLTIP_MAX_LINE_LEN)
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local text
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text=$(echo "$1" | fold -s -w $TOOLTIP_MAX_LINE_LEN)
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echo "$text"
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}
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get_nscreens() {
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local nscreens=$(xrandr -q | awk '/ connected/ {count++} END {print count}')
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local nscreens
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nscreens=$(xrandr -q | awk '/ connected/ {count++} END {print count}')
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echo "$nscreens"
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}
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screen_get_smallest_resolution() {
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local res=$(xrandr -q | awk '/*/ {print $1}' \
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local res
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res=$(xrandr -q | awk '/*/ {print $1}' \
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| awk 'BEGIN{FS="x";} NR==1 || $1<min {line=$0; min=$1}; END {print line}')
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echo "$res"
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}
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screen_get_highest_resolution() {
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local res=$(xrandr -q | awk '/\*/ {print $1}' \
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local res
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res=$(xrandr -q | awk '/\*/ {print $1}' \
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| awk 'BEGIN{FS="x";} NR==1 || $1>max {line=$0; max=$1}; END {print line}')
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echo "$res"
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}
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get_random_image() {
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local img_fn="$(find $IMG_PATH -type f | sort -R | head -n1 )"
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local img_fn
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img_fn="$(find "$IMG_PATH" -type f | sort -R | head -n1 )"
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if ! [[ -e "$img_fn" ]]; then
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error "Could not find image to display"
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@ -248,15 +259,16 @@ convert_image() {
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local img_name_len=$((${#img_name} - 4))
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local img_name_png=${img_name:0:$img_name_len}".png"
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log "Converting $img_name to $img_name_png"
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$(convert $img_name $img_name_png)
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$(rm -f $img_name)
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convert "$img_name" "$img_name_png"
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rm -f "$img_name"
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}
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image_add_text() {
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local tmp_file=$(mktemp)
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local tmp_file
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tmp_file=$(mktemp)
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log "Adding \""${2}"\" to ${1} and saving image to ${tmp_file}"
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$(convert "${1}" -font "${5}" -gravity "${3}" -pointsize "${7}" -fill "${4}" $8 -annotate "${6}" "${2}" "${tmp_file}")
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log "Adding ${2} to ${1} and saving image to ${tmp_file}"
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convert "${1}" -font "${5}" -gravity "${3}" -pointsize "${7}" -fill "${4}" $8 -annotate "${6}" "${2}" "${tmp_file}"
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if ! [[ -e "$tmp_file" ]]; then
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error "Could not find image with text overlay"
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@ -268,18 +280,22 @@ image_add_text() {
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target_image_size() {
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IFS='x'
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read -a strarr <<< "$1"
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local img_size_x=`expr "${strarr[0]}" - $IMAGE_PADDING_PX`
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local img_size_y=`expr "${strarr[1]}" - $IMAGE_PADDING_PX`
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local img_size="${img_size_x}x${img_size_y}"
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read -r -a strarr <<< "$1"
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local img_size_x
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img_size_x=$((strarr[0] - IMAGE_PADDING_PX))
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local img_size_y
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img_size_y=$((strarr[1] - IMAGE_PADDING_PX))
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local img_size
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img_size="${img_size_x}x${img_size_y}"
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echo "$img_size"
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}
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resize_image() {
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local tmp_file=$(mktemp)
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local tmp_file
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tmp_file=$(mktemp)
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log "Resizing $img_fn to $2 and saving image to $tmp_file"
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convert -adaptive-resize $2 $img_fn $tmp_file
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convert -adaptive-resize "$2" "$img_fn" "$tmp_file"
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if ! [[ -e "$tmp_file" ]]; then
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error "Could not find resized image"
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@ -290,10 +306,11 @@ resize_image() {
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}
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center_image() {
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local tmp_file=$(mktemp)
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local tmp_file
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tmp_file=$(mktemp)
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log "Centering $tmp_file and saving image to $tmp_file"
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$(convert $tmp_file_r -gravity center -background $BG_COLOUR -extent $res $tmp_file)
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convert "$tmp_file_r" -gravity center -background "$BG_COLOUR" -extent "$res" "$tmp_file"
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if ! [[ -e "$tmp_file" ]]; then
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error "Could not find centered image"
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@ -304,30 +321,40 @@ center_image() {
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}
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prepare_image() {
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local res=$(screen_get_highest_resolution)
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local img_name=$(xkcd_get_img_name_from_file $img_fn)
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local img_nr=$(xkcd_get_img_nr $img_name)
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local text=$(xkcd_get_img_tooltip $img_nr)
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img_tooltip=$(xkcd_format_tooltip $text)
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local res
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res=$(screen_get_highest_resolution)
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local img_name
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img_name=$(xkcd_get_img_name_from_file "$img_fn")
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local img_nr
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img_nr=$(xkcd_get_img_nr "$img_name")
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local text
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text=$(xkcd_get_img_tooltip "$img_nr")
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local img_tooltip_text
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img_tooltip_text=$(xkcd_format_tooltip "$text")
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local img_target_size=$(target_image_size $res)
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local tmp_file_r=$(resize_image $img_fn $img_target_size)
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local tmp_file_c=$(center_image $tmp_file_r $res)
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local tmp_file_t1=$(image_add_text "${tmp_file_c}" "${img_nr}" "Northeast" "green" "${FONT_PATH}" "+50+50" "50")
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local tmp_file_t2=$(image_add_text "${tmp_file_t1}" "${img_tooltip}" "Southwest" "red" "${FONT_PATH}" "+0+0" "30" " -undercolor '#00000080' ")
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local img_target_size
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img_target_size=$(target_image_size "$res")
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local tmp_file_r
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tmp_file_r=$(resize_image "$img_fn" "$img_target_size")
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local tmp_file_c
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tmp_file_c=$(center_image "$tmp_file_r" "$res")
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local tmp_file_t1
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tmp_file_t1=$(image_add_text "${tmp_file_c}" "${img_nr}" "Northeast" "green" "${FONT_PATH}" "+50+50" "50")
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local tmp_file_t2
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tmp_file_t2=$(image_add_text "${tmp_file_t1}" "${img_tooltip_text}" "Southwest" "red" "${FONT_PATH}" "+0+0" "30" " -undercolor '#00000080' ")
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echo "$tmp_file_t2"
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}
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screen_lock() {
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local img_fn_final=$(prepare_image $img_fn)
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local img_fn_final
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img_fn_final=$(prepare_image "$img_fn")
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log "Locking screen with $img_fn"
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$LOCK_BIN -i $img_fn_final
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$LOCK_BIN -i "$img_fn_final"
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}
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main() {
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local locker=$(which $LOCK_BIN)
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local OPTIND
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while getopts "h?i:l:vVm:dy" opt; do
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@ -342,8 +369,9 @@ main() {
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exit 0
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;;
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i)
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local img_fn="${OPTARG}"
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local r=$(screen_lock $img_fn)
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local img_fn
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img_fn="${OPTARG}"
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screen_lock "$img_fn"
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exit 0
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;;
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l)
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@ -364,7 +392,7 @@ main() {
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exit 0
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;;
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y)
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r=$(xkcd_get_all_images)
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xkcd_get_all_images
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exit 0
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esac
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done
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@ -377,11 +405,15 @@ main() {
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fi
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case "$IMG_CHOICE" in
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"latest") local img_fn=$(xkcd_get_latest_image);;
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"random") local img_fn=$(get_random_image);;
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"latest")
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local img_fn
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img_fn=$(xkcd_get_latest_image);;
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"random")
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local img_fn
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img_fn=$(get_random_image);;
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esac
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screen_lock $img_fn
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screen_lock "$img_fn"
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}
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main "$@"
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