+#!/usr/bin/env bash
+# Version: 0.0.3
+# 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
+
+#===Declare local functions===
+yell() { echo "$0: $*" >&2; } # print script path and all args to stderr
+die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status
+must() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails
+checkapp() {
+ # Desc: If arg is a command, save result in assoc array 'appRollCall'
+ # Usage: checkapp arg1 arg2 arg3 ...
+ # Version: 0.1.1
+ # Input: global assoc. array 'appRollCall'
+ # Output: adds/updates key(value) to global assoc array 'appRollCall'
+ # Depends: bash 5.0.3
+ local returnState
+
+ #===Process Args===
+ for arg in "$@"; do
+ if command -v "$arg" 1>/dev/null 2>&1; then # Check if arg is a valid command
+ appRollCall[$arg]="true";
+ if ! [ "$returnState" = "false" ]; then returnState="true"; fi;
+ else
+ appRollCall[$arg]="false"; returnState="false";
+ fi;
+ done;
+
+ #===Determine function return code===
+ if [ "$returnState" = "true" ]; then
+ return 0;
+ else
+ return 1;
+ fi;
+} # Check that app exists
+checkfile() {
+ # Desc: If arg is a file path, save result in assoc array 'fileRollCall'
+ # Usage: checkfile arg1 arg2 arg3 ...
+ # Version: 0.1.1
+ # Input: global assoc. array 'fileRollCall'
+ # Output: adds/updates key(value) to global assoc array 'fileRollCall';
+ # Output: returns 0 if app found, 1 otherwise
+ # Depends: bash 5.0.3
+ local returnState
+
+ #===Process Args===
+ for arg in "$@"; do
+ if [ -f "$arg" ]; then
+ fileRollCall["$arg"]="true";
+ if ! [ "$returnState" = "false" ]; then returnState="true"; fi;
+ else
+ fileRollCall["$arg"]="false"; returnState="false";
+ fi;
+ done;
+
+ #===Determine function return code===
+ if [ "$returnState" = "true" ]; then
+ return 0;
+ else
+ return 1;
+ fi;
+} # Check that file exists
+checkdir() {
+ # Desc: If arg is a dir path, save result in assoc array 'dirRollCall'
+ # Usage: checkdir arg1 arg2 arg3 ...
+ # Version 0.1.1
+ # Input: global assoc. array 'dirRollCall'
+ # Output: adds/updates key(value) to global assoc array 'dirRollCall';
+ # Output: returns 0 if app found, 1 otherwise
+ # Depends: Bash 5.0.3
+ local returnState
+
+ #===Process Args===
+ for arg in "$@"; do
+ if [ -d "$arg" ]; then
+ dirRollCall["$arg"]="true";
+ if ! [ "$returnState" = "false" ]; then returnState="true"; fi
+ else
+ dirRollCall["$arg"]="false"; returnState="false";
+ fi
+ done
+
+ #===Determine function return code===
+ if [ "$returnState" = "true" ]; then
+ return 0;
+ else
+ return 1;
+ fi
+} # Check that dir exists
+displayMissing() {
+ # Desc: Displays missing apps, files, and dirs
+ # Usage: displayMissing
+ # Version 0.1.1
+ # Input: associative arrays: appRollCall, fileRollCall, dirRollCall
+ # Output: stderr: messages indicating missing apps, file, or dirs
+ # Depends: bash 5, checkAppFileDir()
+ local missingApps value appMissing missingFiles fileMissing
+ local missingDirs dirMissing
+
+ #==BEGIN Display errors==
+ #===BEGIN Display Missing Apps===
+ missingApps="Missing apps :";
+ #for key in "${!appRollCall[@]}"; do echo "DEBUG:$key => ${appRollCall[$key]}"; done
+ for key in "${!appRollCall[@]}"; do
+ value="${appRollCall[$key]}";
+ if [ "$value" = "false" ]; then
+ #echo "DEBUG:Missing apps: $key => $value";
+ missingApps="$missingApps""$key ";
+ appMissing="true";
+ fi;
+ done;
+ if [ "$appMissing" = "true" ]; then # Only indicate if an app is missing.
+ echo "$missingApps" 1>&2;
+ fi;
+ unset value;
+ #===END Display Missing Apps===
+
+ #===BEGIN Display Missing Files===
+ missingFiles="Missing files:";
+ #for key in "${!fileRollCall[@]}"; do echo "DEBUG:$key => ${fileRollCall[$key]}"; done
+ for key in "${!fileRollCall[@]}"; do
+ value="${fileRollCall[$key]}";
+ if [ "$value" = "false" ]; then
+ #echo "DEBUG:Missing files: $key => $value";
+ missingFiles="$missingFiles""$key ";
+ fileMissing="true";
+ fi;
+ done;
+ if [ "$fileMissing" = "true" ]; then # Only indicate if an app is missing.
+ echo "$missingFiles" 1>&2;
+ fi;
+ unset value;
+ #===END Display Missing Files===
+
+ #===BEGIN Display Missing Directories===
+ missingDirs="Missing dirs:";
+ #for key in "${!dirRollCall[@]}"; do echo "DEBUG:$key => ${dirRollCall[$key]}"; done
+ for key in "${!dirRollCall[@]}"; do
+ value="${dirRollCall[$key]}";
+ if [ "$value" = "false" ]; then
+ #echo "DEBUG:Missing dirs: $key => $value";
+ missingDirs="$missingDirs""$key ";
+ dirMissing="true";
+ fi;
+ done;
+ if [ "$dirMissing" = "true" ]; then # Only indicate if an dir is missing.
+ echo "$missingDirs" 1>&2;
+ fi;
+ unset value;
+ #===END Display Missing Directories===
+
+ #==END Display errors==
+} # Display missing apps, files, dirs
+check_depends() {
+ if ! checkapp feh parallel; then displayMissing; die "FATAL:Missing apps."; fi;
+ return 1;
+}; # check dependencies
+read_stdin_psarg() {
+ # Desc: Consumes stdin and reads arguments; outputs as stdout lines
+ # Input: stdin (consumes)
+ # Input: args
+ # Output: stdout (newline delimited)
+ # Example: read_stdin_psarg "$@"
+ # Depends: GNU bash (version 5.1.16)
+ # Version: 0.0.1
+ local input_stdin input_psarg output;
+
+ # Store stdin
+ if [[ -p /dev/stdin ]]; then
+ input_stdin="$(cat -)";
+ fi;
+
+ # Store arguments
+ if [[ $# -gt 0 ]]; then
+ input_psarg="$@";
+ fi;
+
+ # Combine as output array elements
+ ## Read in stdin
+ if [[ -n $input_stdin ]]; then
+ while read -r line; do
+ output+=("$line");
+ done < <(printf "%s\n" "$input_stdin");
+ fi;
+ ## Read in positional arguments
+ if [[ -n $input_psarg ]]; then
+ for arg in "$@"; do
+ output+=("$arg");
+ done;
+ fi;
+
+ # Print to stdout
+ printf "%s\n" "${output[@]}";
+}; # read stdin and positional argument to stdout lines
+print_filelist() {
+ # Desc: print file list to stdout via `find` using script parameters
+ # Input: arg1: path to dir
+ # var: find_depth
+ # var: pattern_find_iregex
+ # var: find_size
+ if [[ ! -d "$1" ]]; then return 1; fi;
+ must find "$1" -maxdepth "$find_depth" -type f -iregex "$pattern_find_iregex" -size +"$find_size";
+}; # print file list to stdout from dir with script parameters
+main() {
+ # Depends: read_stdin_psarg() v0.0.1, check_depends()
+ declare -a main_dirs;
+ declare -a paths_images;
+ declare list_paths_images;
+ check_depends;
+
+ # Find settings
+ find_depth=10; # default: 10
+ find_size="10k"; # default: minimum "10k"
+ #Find files ending in .jpg, .gif, etc.
+ pattern_find_iregex=".+\(jpg\|jpeg\|gif\|png\|webm\)$"; # update according to `find . -type f | grep -Eo "\.([[:alnum:]])+$" | sort -u`
+ export find_depth find_size pattern_find_iregex; # export for parallel
+
+ #Populate main_dirs array
+ ## Read stdin and positional arguments as lines
+ while read -r line; do
+ if [[ ! -d "$line" ]]; then
+ echo "ERROR:Not a dir:$line" 1>&2;
+ continue;
+ fi;
+ main_dirs+=("$line");
+ done < <(read_stdin_psarg "$@");
+
+ # Generate file list
+ paths_images+=("$( parallel print_filelist {} ::: "${main_dirs[@]}" )"); # See [1]
+
+ # Convert paths_images array into file list
+ for i in "${!paths_images[@]}"; do
+ list_paths_images="$(printf "%s\n%s" "${paths_images[$i]}" "$list_paths_images")";
+
+ # Get stats
+ file_count="$(wc -l < <(echo -n "$list_paths_images"))";
+ echo "$DEBUG:file_count:$file_count"
+ done;
+
+ # Sort and remove duplicates
+ list_paths_images="$(echo "$list_paths_images" | sort -u | tr -s '\n')";
+
+ # Write
+ list_paths_images_tmp="/dev/shm/$(date +%Y%m%dT%H%M%S.%N%z)"..feh_paths.txt;
+ must echo -n "$list_paths_images" > "$list_paths_images_tmp";
+
+ # 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";
+
+ # Cleanup
+ must rm "$list_paths_images_tmp";
+};
+export -f yell die must read_stdin_psarg print_filelist;
+#==END Define local functions==
+
+main "$@";
+
+# Author: Steven Baltakatei Sandoval
+# License: GPLv3+
projects / BK-2020-03.git / commitdiff