| | 1 | #!/usr/bin/env bash |
| | 2 | # Version: 0.1.0 |
| | 3 | # Ref/Attrib: [1] Tange, Ole. GNU Parallel with Bash Array. 2019-03-24. https://unix.stackexchange.com/a/508365/411854 |
| | 4 | # Depends: GNU Parallel, GNU Bash v5.1.16, feh 3.6.3 |
| | 5 | |
| | 6 | #===Declare local functions=== |
| | 7 | yell() { echo "$0: $*" >&2; } # print script path and all args to stderr |
| | 8 | die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status |
| | 9 | must() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails |
| | 10 | checkapp() { |
| | 11 | # Desc: If arg is a command, save result in assoc array 'appRollCall' |
| | 12 | # Usage: checkapp arg1 arg2 arg3 ... |
| | 13 | # Version: 0.1.1 |
| | 14 | # Input: global assoc. array 'appRollCall' |
| | 15 | # Output: adds/updates key(value) to global assoc array 'appRollCall' |
| | 16 | # Depends: bash 5.0.3 |
| | 17 | local returnState |
| | 18 | |
| | 19 | #===Process Args=== |
| | 20 | for arg in "$@"; do |
| | 21 | if command -v "$arg" 1>/dev/null 2>&1; then # Check if arg is a valid command |
| | 22 | appRollCall[$arg]="true"; |
| | 23 | if ! [ "$returnState" = "false" ]; then returnState="true"; fi; |
| | 24 | else |
| | 25 | appRollCall[$arg]="false"; returnState="false"; |
| | 26 | fi; |
| | 27 | done; |
| | 28 | |
| | 29 | #===Determine function return code=== |
| | 30 | if [ "$returnState" = "true" ]; then |
| | 31 | return 0; |
| | 32 | else |
| | 33 | return 1; |
| | 34 | fi; |
| | 35 | } # Check that app exists |
| | 36 | checkfile() { |
| | 37 | # Desc: If arg is a file path, save result in assoc array 'fileRollCall' |
| | 38 | # Usage: checkfile arg1 arg2 arg3 ... |
| | 39 | # Version: 0.1.1 |
| | 40 | # Input: global assoc. array 'fileRollCall' |
| | 41 | # Output: adds/updates key(value) to global assoc array 'fileRollCall'; |
| | 42 | # Output: returns 0 if app found, 1 otherwise |
| | 43 | # Depends: bash 5.0.3 |
| | 44 | local returnState |
| | 45 | |
| | 46 | #===Process Args=== |
| | 47 | for arg in "$@"; do |
| | 48 | if [ -f "$arg" ]; then |
| | 49 | fileRollCall["$arg"]="true"; |
| | 50 | if ! [ "$returnState" = "false" ]; then returnState="true"; fi; |
| | 51 | else |
| | 52 | fileRollCall["$arg"]="false"; returnState="false"; |
| | 53 | fi; |
| | 54 | done; |
| | 55 | |
| | 56 | #===Determine function return code=== |
| | 57 | if [ "$returnState" = "true" ]; then |
| | 58 | return 0; |
| | 59 | else |
| | 60 | return 1; |
| | 61 | fi; |
| | 62 | } # Check that file exists |
| | 63 | checkdir() { |
| | 64 | # Desc: If arg is a dir path, save result in assoc array 'dirRollCall' |
| | 65 | # Usage: checkdir arg1 arg2 arg3 ... |
| | 66 | # Version 0.1.1 |
| | 67 | # Input: global assoc. array 'dirRollCall' |
| | 68 | # Output: adds/updates key(value) to global assoc array 'dirRollCall'; |
| | 69 | # Output: returns 0 if app found, 1 otherwise |
| | 70 | # Depends: Bash 5.0.3 |
| | 71 | local returnState |
| | 72 | |
| | 73 | #===Process Args=== |
| | 74 | for arg in "$@"; do |
| | 75 | if [ -d "$arg" ]; then |
| | 76 | dirRollCall["$arg"]="true"; |
| | 77 | if ! [ "$returnState" = "false" ]; then returnState="true"; fi |
| | 78 | else |
| | 79 | dirRollCall["$arg"]="false"; returnState="false"; |
| | 80 | fi |
| | 81 | done |
| | 82 | |
| | 83 | #===Determine function return code=== |
| | 84 | if [ "$returnState" = "true" ]; then |
| | 85 | return 0; |
| | 86 | else |
| | 87 | return 1; |
| | 88 | fi |
| | 89 | } # Check that dir exists |
| | 90 | displayMissing() { |
| | 91 | # Desc: Displays missing apps, files, and dirs |
| | 92 | # Usage: displayMissing |
| | 93 | # Version 0.1.1 |
| | 94 | # Input: associative arrays: appRollCall, fileRollCall, dirRollCall |
| | 95 | # Output: stderr: messages indicating missing apps, file, or dirs |
| | 96 | # Depends: bash 5, checkAppFileDir() |
| | 97 | local missingApps value appMissing missingFiles fileMissing |
| | 98 | local missingDirs dirMissing |
| | 99 | |
| | 100 | #==BEGIN Display errors== |
| | 101 | #===BEGIN Display Missing Apps=== |
| | 102 | missingApps="Missing apps :"; |
| | 103 | #for key in "${!appRollCall[@]}"; do echo "DEBUG:$key => ${appRollCall[$key]}"; done |
| | 104 | for key in "${!appRollCall[@]}"; do |
| | 105 | value="${appRollCall[$key]}"; |
| | 106 | if [ "$value" = "false" ]; then |
| | 107 | #echo "DEBUG:Missing apps: $key => $value"; |
| | 108 | missingApps="$missingApps""$key "; |
| | 109 | appMissing="true"; |
| | 110 | fi; |
| | 111 | done; |
| | 112 | if [ "$appMissing" = "true" ]; then # Only indicate if an app is missing. |
| | 113 | echo "$missingApps" 1>&2; |
| | 114 | fi; |
| | 115 | unset value; |
| | 116 | #===END Display Missing Apps=== |
| | 117 | |
| | 118 | #===BEGIN Display Missing Files=== |
| | 119 | missingFiles="Missing files:"; |
| | 120 | #for key in "${!fileRollCall[@]}"; do echo "DEBUG:$key => ${fileRollCall[$key]}"; done |
| | 121 | for key in "${!fileRollCall[@]}"; do |
| | 122 | value="${fileRollCall[$key]}"; |
| | 123 | if [ "$value" = "false" ]; then |
| | 124 | #echo "DEBUG:Missing files: $key => $value"; |
| | 125 | missingFiles="$missingFiles""$key "; |
| | 126 | fileMissing="true"; |
| | 127 | fi; |
| | 128 | done; |
| | 129 | if [ "$fileMissing" = "true" ]; then # Only indicate if an app is missing. |
| | 130 | echo "$missingFiles" 1>&2; |
| | 131 | fi; |
| | 132 | unset value; |
| | 133 | #===END Display Missing Files=== |
| | 134 | |
| | 135 | #===BEGIN Display Missing Directories=== |
| | 136 | missingDirs="Missing dirs:"; |
| | 137 | #for key in "${!dirRollCall[@]}"; do echo "DEBUG:$key => ${dirRollCall[$key]}"; done |
| | 138 | for key in "${!dirRollCall[@]}"; do |
| | 139 | value="${dirRollCall[$key]}"; |
| | 140 | if [ "$value" = "false" ]; then |
| | 141 | #echo "DEBUG:Missing dirs: $key => $value"; |
| | 142 | missingDirs="$missingDirs""$key "; |
| | 143 | dirMissing="true"; |
| | 144 | fi; |
| | 145 | done; |
| | 146 | if [ "$dirMissing" = "true" ]; then # Only indicate if an dir is missing. |
| | 147 | echo "$missingDirs" 1>&2; |
| | 148 | fi; |
| | 149 | unset value; |
| | 150 | #===END Display Missing Directories=== |
| | 151 | |
| | 152 | #==END Display errors== |
| | 153 | } # Display missing apps, files, dirs |
| | 154 | check_depends() { |
| | 155 | if ! checkapp feh parallel; then displayMissing; die "FATAL:Missing apps."; fi; |
| | 156 | return 1; |
| | 157 | }; # check dependencies |
| | 158 | read_stdin() { |
| | 159 | # Desc: Consumes stdin; outputs as stdout lines |
| | 160 | # Input: stdin (consumes) |
| | 161 | # Output: stdout (newline delimited) |
| | 162 | # Example: printf "foo\nbar\n" | read_stdin |
| | 163 | # Depends: GNU bash (version 5.1.16) |
| | 164 | # Version: 0.0.1 |
| | 165 | local input_stdin output; |
| | 166 | |
| | 167 | # Store stdin |
| | 168 | if [[ -p /dev/stdin ]]; then |
| | 169 | input_stdin="$(cat -)"; |
| | 170 | fi; |
| | 171 | |
| | 172 | # Store as output array elements |
| | 173 | ## Read in stdin |
| | 174 | if [[ -n $input_stdin ]]; then |
| | 175 | while read -r line; do |
| | 176 | output+=("$line"); |
| | 177 | done < <(printf "%s\n" "$input_stdin"); |
| | 178 | fi; |
| | 179 | |
| | 180 | # Print to stdout |
| | 181 | printf "%s\n" "${output[@]}"; |
| | 182 | }; # read stdin to stdout lines |
| | 183 | read_psarg() { |
| | 184 | # Desc: Reads arguments; outputs as stdout lines |
| | 185 | # Input: args |
| | 186 | # Output: stdout (newline delimited) |
| | 187 | # Example: read_psarg "$@" |
| | 188 | # Depends: GNU bash (version 5.1.16) |
| | 189 | # Version: 0.0.1 |
| | 190 | local input_psarg output; |
| | 191 | |
| | 192 | # Store arguments |
| | 193 | if [[ $# -gt 0 ]]; then |
| | 194 | input_psarg="$*"; |
| | 195 | fi; |
| | 196 | |
| | 197 | # Store as output array elements |
| | 198 | ## Read in positional arguments |
| | 199 | if [[ -n $input_psarg ]]; then |
| | 200 | for arg in "$@"; do |
| | 201 | output+=("$arg"); |
| | 202 | done; |
| | 203 | fi; |
| | 204 | |
| | 205 | # Print to stdout |
| | 206 | printf "%s\n" "${output[@]}"; |
| | 207 | }; # read positional argument to stdout lines |
| | 208 | find_flist() { |
| | 209 | # Desc: print file list to stdout via `find` using script parameters |
| | 210 | # Input: arg1: path to dir |
| | 211 | # var: find_depth |
| | 212 | # var: pattern_find_iregex |
| | 213 | # var: find_size |
| | 214 | if [[ ! -d "$1" ]]; then return 1; fi; |
| | 215 | must find "$1" -maxdepth "$fdepth" -type f -iregex "$firegex" -size +"$fsize"; |
| | 216 | }; # print file list to stdout from dir with script parameters |
| | 217 | save_sample() { |
| | 218 | # Usage: save_sample arg1 |
| | 219 | # Input: arg1 list_paths (list of files to take samples from) |
| | 220 | # envvar BKFEH_SAMPLE_DIR (environment variable set outside of this script) |
| | 221 | # Depends: yell(), GNU Parallel, GNU find, GNU Coreutils 8.32 (cut, find, du) |
| | 222 | local list_paths |
| | 223 | sample_count="100"; |
| | 224 | sample_max_space="100000000"; # bytes |
| | 225 | |
| | 226 | if [[ ! -v BKFEH_SAMPLE_DIR ]]; then return 0; fi; # return early if environment var not set. |
| | 227 | |
| | 228 | if [[ ! -z "$1" ]]; then |
| | 229 | list_paths="$1"; # newline-delimited list of file paths to sample from |
| | 230 | else |
| | 231 | yell "ERROR:NO paths available to sample."; |
| | 232 | fi; |
| | 233 | |
| | 234 | if [[ -d "$BKFEH_SAMPLE_DIR" ]]; then |
| | 235 | sample_dir="$BKFEH_SAMPLE_DIR"; |
| | 236 | yell "STATUS:Environment variable BKFEH_SAMPLE_DIR set. Clearing and saving samples..."; |
| | 237 | |
| | 238 | ## clear previous sample |
| | 239 | count_samples="$(find $BKFEH_SAMPLE_DIR -maxdepth 1 -type f | wc -l)"; |
| | 240 | find "$BKFEH_SAMPLE_DIR" -maxdepth 1 -type f -exec rm '{}' \; ; |
| | 241 | |
| | 242 | ## save random sample |
| | 243 | yell "STATUS:Saving random sample of size $sample_count to $BKFEH_SAMPLE_DIR..."; |
| | 244 | list_paths_sample="$(echo "$list_paths" | shuf | head -n"$sample_count")"; |
| | 245 | while read -r line; do |
| | 246 | if [[ -z "$line" ]]; then continue; fi; |
| | 247 | ### check size limit |
| | 248 | sample_act_space="$(du -bd1 "$BKFEH_SAMPLE_DIR" | cut -f1 )"; # actual used space |
| | 249 | cand_space="$(du -bd1 "$line" | cut -f1 )"; # size of candidate file to add |
| | 250 | sample_req_space="$((sample_act_space + cand_space))"; |
| | 251 | if [[ "$sample_req_space" -lt "$sample_max_space" ]]; then |
| | 252 | #### add file to sample dir |
| | 253 | cp -n "$line" "$BKFEH_SAMPLE_DIR" ; |
| | 254 | fi; |
| | 255 | done < <( echo "$list_paths_sample" ); |
| | 256 | else |
| | 257 | yell "ERROR:Does not exist: $BKFEH_SAMPLE_DIR"; |
| | 258 | fi; |
| | 259 | }; # save sample of files |
| | 260 | |
| | 261 | main() { |
| | 262 | # Depends: read_stdin_psarg() v0.0.1, check_depends() |
| | 263 | local re_dotfile; |
| | 264 | declare -a dirs_stdin dirs_psarg; |
| | 265 | declare -a paths_images; |
| | 266 | declare list_paths_images; |
| | 267 | check_depends; |
| | 268 | |
| | 269 | #Populate dirs_stdin and dirs_psarg arrays |
| | 270 | ## Read stdin as lines |
| | 271 | re_dotfile="^\."; # first char is a dot |
| | 272 | while read -r line; do |
| | 273 | line="$(readlink -e "$line")"; |
| | 274 | # Check if dir |
| | 275 | if [[ ! -d "$line" ]]; then |
| | 276 | echo "ERROR:Not a dir:$line" 1>&2; |
| | 277 | continue; |
| | 278 | fi; |
| | 279 | dir_name="$(basename "$line")"; |
| | 280 | # Exclude dotdirs |
| | 281 | if [[ "$dir_name" =~ $re_dotfile ]]; then |
| | 282 | echo "ERROR:Is a dotdir:$line" 1>&2; |
| | 283 | continue |
| | 284 | fi; |
| | 285 | dirs_stdin+=("$line"); |
| | 286 | done < <(read_stdin); |
| | 287 | ## Read positional arguments as lines |
| | 288 | re_dotfile="^\."; # first char is a dot |
| | 289 | while read -r line; do |
| | 290 | line="$(readlink -e "$line")"; |
| | 291 | # Check if dir |
| | 292 | if [[ ! -d "$line" ]]; then |
| | 293 | echo "ERROR:Not a dir:$line" 1>&2; |
| | 294 | continue; |
| | 295 | fi; |
| | 296 | dir_name="$(basename "$line")"; |
| | 297 | # Exclude dotdirs |
| | 298 | if [[ "$dir_name" =~ $re_dotfile ]]; then |
| | 299 | echo "ERROR:Is a dotdir:$line" 1>&2; |
| | 300 | continue |
| | 301 | fi; |
| | 302 | dirs_psarg+=("$line"); |
| | 303 | done < <(read_psarg "$@"); |
| | 304 | |
| | 305 | # Catch all arrays empty |
| | 306 | if [[ "${#dirs_stdin[@]}" -le 0 ]] && [[ "${#dirs_psarg[@]}" -le 0 ]]; then |
| | 307 | die "FATAL:No valid directories provided."; |
| | 308 | fi; |
| | 309 | |
| | 310 | # Generate file list |
| | 311 | # Find settings |
| | 312 | firegex=".+\(jpg\|jpeg\|gif\|png\|webm\)$"; # update according to `find . -type f | grep -Eo "\.([[:alnum:]])+$" | sort -u` |
| | 313 | fsize="10k"; # default: minimum "10k" |
| | 314 | export firegex fsize ; # export for parallel |
| | 315 | ## Call find_filelist() in parallel for positional argument input |
| | 316 | if [[ "${#dirs_psarg[@]}" -gt 0 ]]; then |
| | 317 | fdepth=10; export fdepth; # 10 for dirs from positional arguments |
| | 318 | paths_images+=("$( parallel find_flist {} "$fdepth" "$firegex" "$fsize" ::: "${dirs_psarg[@]}" )"); # See [1] |
| | 319 | fi; |
| | 320 | ## Call find_filelist() in parallel for stdin input |
| | 321 | if [[ "${#dirs_stdin[@]}" -gt 0 ]]; then |
| | 322 | fdepth=1; export fdepth; # 1 ofr dirs from stdin |
| | 323 | paths_images+=("$( parallel find_flist {} "$fdepth" "$firegex" "$fsize" ::: "${dirs_stdin[@]}" )"); # See [1] |
| | 324 | fi; |
| | 325 | |
| | 326 | # Convert paths_images array into file list |
| | 327 | for i in "${!paths_images[@]}"; do |
| | 328 | list_paths_images="$(printf "%s\n%s" "${paths_images[$i]}" "$list_paths_images")"; |
| | 329 | |
| | 330 | # Get stats |
| | 331 | file_count="$(wc -l < <(echo -n "$list_paths_images"))"; |
| | 332 | echo "$DEBUG:file_count:$file_count" |
| | 333 | done; |
| | 334 | |
| | 335 | # Sort, remove duplicate paths |
| | 336 | list_paths_images="$(echo "$list_paths_images" | sort -u | tr -s '\n')"; |
| | 337 | |
| | 338 | # Remove paths with dotfiles |
| | 339 | list_paths_images="$(echo "$list_paths_images" | grep -viE "/\." )"; |
| | 340 | |
| | 341 | # Write |
| | 342 | list_paths_images_tmp="/dev/shm/$(date +%Y%m%dT%H%M%S.%N%z)"..feh_paths.txt; |
| | 343 | must echo -n "$list_paths_images" > "$list_paths_images_tmp"; |
| | 344 | ## Save sample to path in env. var. BKFEH_SAMPLE_DIR if set |
| | 345 | save_sample "$list_paths_images"; |
| | 346 | |
| | 347 | # Print stats |
| | 348 | yell "STATUS:Built file list in $SECONDS seconds."; |
| | 349 | |
| | 350 | # Run feh with filelist |
| | 351 | feh --full-screen --auto-zoom --draw-filename --filelist "$list_paths_images_tmp"; |
| | 352 | |
| | 353 | # Cleanup |
| | 354 | must rm "$list_paths_images_tmp"; |
| | 355 | }; |
| | 356 | export -f yell die must read_stdin read_psarg find_flist; |
| | 357 | #==END Define local functions== |
| | 358 | |
| | 359 | main "$@"; |
| | 360 | |
| | 361 | # Author: Steven Baltakatei Sandoval |
| | 362 | # License: GPLv3+ |
projects / BK-2020-03.git / blame_incremental