#!/usr/bin/env bash
-# Version: 0.1.0
+# Desc: Wrapper for feh that accepts directory paths via posargs or stdin lines.
+# Version: 0.3.0
# Ref/Attrib: [1] Tange, Ole. GNU Parallel with Bash Array. 2019-03-24. https://unix.stackexchange.com/a/508365/411854
-# Depends: GNU Parallel, GNU Bash v5.1.16, feh 3.6.3
+# Depends: GNU Parallel, GNU Bash v5.1.16, feh 3.6.3, GNU Coreutils 8.32 (b2sum)
#===Declare local functions===
yell() { echo "$0: $*" >&2; } # print script path and all args to stderr
#==END Display errors==
} # Display missing apps, files, dirs
check_depends() {
- if ! checkapp feh parallel; then displayMissing; die "FATAL:Missing apps."; fi;
+ if ! checkapp feh parallel bkshuf b2sum; then
+ displayMissing;
+ die "FATAL:Missing apps.";
+ fi;
return 1;
}; # check dependencies
+checkInt() {
+ # Desc: Checks if arg is integer
+ # Usage: checkInt arg
+ # Input: arg: integer
+ # Output: - return code 0 (if arg is integer)
+ # - return code 1 (if arg is not integer)
+ # Example: if ! checkInt $arg; then echo "not int"; fi;
+ # Version: 0.0.1
+ local returnState
+
+ #===Process Arg===
+ if [[ $# -ne 1 ]]; then
+ die "ERROR:Invalid number of arguments:$#";
+ fi;
+
+ RETEST1='^[0-9]+$'; # Regular Expression to test
+ if [[ ! $1 =~ $RETEST1 ]] ; then
+ returnState="false";
+ else
+ returnState="true";
+ fi;
+
+ #===Determine function return code===
+ if [ "$returnState" = "true" ]; then
+ return 0;
+ else
+ return 1;
+ fi;
+} # Checks if arg is integer
read_stdin() {
# Desc: Consumes stdin; outputs as stdout lines
# Input: stdin (consumes)
# Usage: save_sample arg1
# Input: arg1 list_paths (list of files to take samples from)
# envvar BKFEH_SAMPLE_DIR (environment variable set outside of this script)
- # Depends: yell(), GNU Parallel, GNU find, GNU Coreutils 8.32 (cut, find, du)
+ # envvar BKFEH_SAMPLE_SIZE (space limit for sample dir files)
+ # Depends: GNU Parallel, GNU find, GNU Coreutils 8.32 (cut, find, du)
+ # BK-2020-03: bkshuf (0.0.1), yell()
local list_paths
- sample_count="100";
- sample_max_space="100000000"; # bytes
-
+ sample_count="100"; # max number of images to put in sample dir
+ sample_max_space="10000000"; # max bytes to put in sample dir
+
+ # Load environment variables if set
if [[ ! -v BKFEH_SAMPLE_DIR ]]; then return 0; fi; # return early if environment var not set.
+ if [[ -v BKFEH_SAMPLE_SIZE ]] && checkInt "$BKFEH_SAMPLE_SIZE"; then
+ sample_max_space="$BKFEH_SAMPLE_SIZE";
+ fi;
+ if [[ -v BKFEH_SAMPLE_COUNT ]] && checkInt "$BKFEH_SAMPLE_COUNT"; then
+ sample_count="$BKFEH_SAMPLE_COUNT";
+ fi;
- if [[ ! -z "$1" ]]; then
+ if [[ -n "$1" ]]; then
list_paths="$1"; # newline-delimited list of file paths to sample from
else
yell "ERROR:NO paths available to sample.";
fi;
if [[ -d "$BKFEH_SAMPLE_DIR" ]]; then
- sample_dir="$BKFEH_SAMPLE_DIR";
+ #sample_dir="$BKFEH_SAMPLE_DIR";
yell "STATUS:Environment variable BKFEH_SAMPLE_DIR set. Clearing and saving samples...";
## clear previous sample
- count_samples="$(find $BKFEH_SAMPLE_DIR -maxdepth 1 -type f | wc -l)";
+ count_prev_samples="$(find "$BKFEH_SAMPLE_DIR" -maxdepth 1 -type f | wc -l)";
+ yell "STATUS:Deleting $count_prev_samples previous samples...";
find "$BKFEH_SAMPLE_DIR" -maxdepth 1 -type f -exec rm '{}' \; ;
## save random sample
yell "STATUS:Saving random sample of size $sample_count to $BKFEH_SAMPLE_DIR...";
- list_paths_sample="$(echo "$list_paths" | shuf | head -n"$sample_count")";
+ list_paths_sample="$(echo "$list_paths" | bkshuf "$sample_count" | head -n"$sample_count")";
+ n_samp=0; # init sample file counter
+ sample_log="$BKFEH_SAMPLE_DIR"/paths.txt;
+ printf "%s,%s,%s\n" "n_samp" "file_hash" "file_path" >> "$sample_log";
while read -r line; do
if [[ -z "$line" ]]; then continue; fi;
### check size limit
sample_act_space="$(du -bd1 "$BKFEH_SAMPLE_DIR" | cut -f1 )"; # actual used space
cand_space="$(du -bd1 "$line" | cut -f1 )"; # size of candidate file to add
sample_req_space="$((sample_act_space + cand_space))";
+
+ ### Customize file names
+ n_samp_w="$(printf "%s" "$sample_count" | wc -c)";
+ n_samp_fmt="%0""$n_samp_w""d";
+ n_samp_dd="$(printf "$n_samp_fmt" "$n_samp")"; # sample number fixed-width
+ file_path="$line";
+ #file_dir="$(dirname "$line")";
+ file_name="$(basename "$line")";
+ file_hash="$(b2sum -l32 "$line" | awk '{print $1}')"; # use file hash to avoid clobbering
+ file_ext="${file_name##*.}";
+ file_name="${file_name%.*}";
+ file_shortname="${file_name:0:32}";
+ file_name_new="$n_samp_dd"_"$file_hash".."$file_shortname"."$file_ext";
+ file_path_new="$BKFEH_SAMPLE_DIR"/"$file_name_new"
if [[ "$sample_req_space" -lt "$sample_max_space" ]]; then
#### add file to sample dir
- cp -n "$line" "$BKFEH_SAMPLE_DIR" ;
+ must cp -n "$file_path" "$file_path_new";
+ #### note path in sample dir log
+ printf "%s,%s,%s\n" "$n_samp_dd" "$file_hash" "$file_path" \
+ >> "$sample_log";
fi;
+ ((n_samp++));
done < <( echo "$list_paths_sample" );
else
yell "ERROR:Does not exist: $BKFEH_SAMPLE_DIR";
# Write
list_paths_images_tmp="/dev/shm/$(date +%Y%m%dT%H%M%S.%N%z)"..feh_paths.txt;
must echo -n "$list_paths_images" > "$list_paths_images_tmp";
- ## Save sample to path in env. var. BKFEH_SAMPLE_DIR if set
- save_sample "$list_paths_images";
# Print stats
yell "STATUS:Built file list in $SECONDS seconds.";
# Run feh with filelist
- feh --full-screen --auto-zoom --draw-filename --filelist "$list_paths_images_tmp";
+ feh --full-screen --auto-zoom --draw-filename --filelist "$list_paths_images_tmp" && \
+ must rm "$list_paths_images_tmp" &
- # Cleanup
- must rm "$list_paths_images_tmp";
+ # Save sample to path in env. var. BKFEH_SAMPLE_DIR if set
+ save_sample "$list_paths_images";
+
};
export -f yell die must read_stdin read_psarg find_flist;
#==END Define local functions==
projects / BK-2020-03.git / blobdiff