bdc543a2b37dd67c3852468f2e7b187d5be3d034
[BK-2020-03.git] / user / bkfeh
1 #!/usr/bin/env bash
2 # Version: 0.0.3
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 "$missingDirs" 1>&2;
148 fi;
149 unset value;
150 #===END Display Missing Directories===
151
152 #==END Display errors==
153 } # Display missing apps, files, dirs
154 check_depends() {
155 if ! checkapp feh parallel; then displayMissing; die "FATAL:Missing apps."; fi;
156 return 1;
157 }; # check dependencies
158 read_stdin_psarg() {
159 # Desc: Consumes stdin and reads arguments; outputs as stdout lines
160 # Input: stdin (consumes)
161 # Input: args
162 # Output: stdout (newline delimited)
163 # Example: read_stdin_psarg "$@"
164 # Depends: GNU bash (version 5.1.16)
165 # Version: 0.0.1
166 local input_stdin input_psarg output;
167
168 # Store stdin
169 if [[ -p /dev/stdin ]]; then
170 input_stdin="$(cat -)";
171 fi;
172
173 # Store arguments
174 if [[ $# -gt 0 ]]; then
175 input_psarg="$@";
176 fi;
177
178 # Combine as output array elements
179 ## Read in stdin
180 if [[ -n $input_stdin ]]; then
181 while read -r line; do
182 output+=("$line");
183 done < <(printf "%s\n" "$input_stdin");
184 fi;
185 ## Read in positional arguments
186 if [[ -n $input_psarg ]]; then
187 for arg in "$@"; do
188 output+=("$arg");
189 done;
190 fi;
191
192 # Print to stdout
193 printf "%s\n" "${output[@]}";
194 }; # read stdin and positional argument to stdout lines
195 print_filelist() {
196 # Desc: print file list to stdout via `find` using script parameters
197 # Input: arg1: path to dir
198 # var: find_depth
199 # var: pattern_find_iregex
200 # var: find_size
201 if [[ ! -d "$1" ]]; then return 1; fi;
202 must find "$1" -maxdepth "$find_depth" -type f -iregex "$pattern_find_iregex" -size +"$find_size";
203 }; # print file list to stdout from dir with script parameters
204 main() {
205 # Depends: read_stdin_psarg() v0.0.1, check_depends()
206 declare -a main_dirs;
207 declare -a paths_images;
208 declare list_paths_images;
209 check_depends;
210
211 # Find settings
212 find_depth=10; # default: 10
213 find_size="10k"; # default: minimum "10k"
214 #Find files ending in .jpg, .gif, etc.
215 pattern_find_iregex=".+\(jpg\|jpeg\|gif\|png\|webm\)$"; # update according to `find . -type f | grep -Eo "\.([[:alnum:]])+$" | sort -u`
216 export find_depth find_size pattern_find_iregex; # export for parallel
217
218 #Populate main_dirs array
219 ## Read stdin and positional arguments as lines
220 while read -r line; do
221 if [[ ! -d "$line" ]]; then
222 echo "ERROR:Not a dir:$line" 1>&2;
223 continue;
224 fi;
225 main_dirs+=("$line");
226 done < <(read_stdin_psarg "$@");
227
228 # Generate file list
229 paths_images+=("$( parallel print_filelist {} ::: "${main_dirs[@]}" )"); # See [1]
230
231 # Convert paths_images array into file list
232 for i in "${!paths_images[@]}"; do
233 list_paths_images="$(printf "%s\n%s" "${paths_images[$i]}" "$list_paths_images")";
234
235 # Get stats
236 file_count="$(wc -l < <(echo -n "$list_paths_images"))";
237 echo "$DEBUG:file_count:$file_count"
238 done;
239
240 # Sort and remove duplicates
241 list_paths_images="$(echo "$list_paths_images" | sort -u | tr -s '\n')";
242
243 # Write
244 list_paths_images_tmp="/dev/shm/$(date +%Y%m%dT%H%M%S.%N%z)"..feh_paths.txt;
245 must echo -n "$list_paths_images" > "$list_paths_images_tmp";
246
247 # Print stats
248 yell "STATUS:Built file list in $SECONDS seconds.";
249
250 # Run feh with filelist
251 feh --full-screen --auto-zoom --draw-filename --filelist "$list_paths_images_tmp";
252
253 # Cleanup
254 must rm "$list_paths_images_tmp";
255 };
256 export -f yell die must read_stdin_psarg print_filelist;
257 #==END Define local functions==
258
259 main "$@";
260
261 # Author: Steven Baltakatei Sandoval
262 # License: GPLv3+