style(user/bknpass):Simplify boilerplate
[BK-2020-03.git] / user / bk-naut-hide
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1#!/usr/bin/env bash
2# Desc: Scan file system and update '.hidden' files to hide certain
3# files based on filenames.
9f85673c 4# Version: 0.0.3
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5# Usage: bk-naut-hide [DIRS...]
6
7yell() { echo "$0: $*" >&2; } # print script path and all args to stderr
8die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status
9try() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails
10checkapp() {
11 # Desc: If arg is a command, save result in assoc array 'appRollCall'
12 # Usage: checkapp arg1 arg2 arg3 ...
13 # Version: 0.1.1
14 # Input: global assoc. array 'appRollCall'
15 # Output: adds/updates key(value) to global assoc array 'appRollCall'
16 # Depends: bash 5.0.3
17 local returnState
18
19 #===Process Args===
20 for arg in "$@"; 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 [ "$returnState" = "true" ]; then
31 return 0;
32 else
33 return 1;
34 fi;
35} # Check that app exists
36checkfile() {
37 # Desc: If arg is a file path, save result in assoc array 'fileRollCall'
38 # Usage: checkfile arg1 arg2 arg3 ...
39 # Version: 0.1.1
40 # Input: global assoc. array 'fileRollCall'
41 # Output: adds/updates key(value) to global assoc array 'fileRollCall';
42 # Output: returns 0 if app found, 1 otherwise
43 # Depends: bash 5.0.3
44 local returnState
45
46 #===Process Args===
47 for arg in "$@"; 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 [ "$returnState" = "true" ]; then
58 return 0;
59 else
60 return 1;
61 fi;
62} # Check that file exists
63checkdir() {
64 # Desc: If arg is a dir path, save result in assoc array 'dirRollCall'
65 # Usage: checkdir arg1 arg2 arg3 ...
66 # Version 0.1.2
67 # Input: global assoc. array 'dirRollCall'
68 # Output: adds/updates key(value) to global assoc array 'dirRollCall';
69 # Output: returns 0 if all args are dirs; 1 otherwise
70 # Depends: Bash 5.0.3
71 local returnState
72
73 #===Process Args===
74 for arg in "$@"; do
75 if [ -z "$arg" ]; then
76 dirRollCall["(Unspecified Dirname(s))"]="false"; returnState="false";
77 elif [ -d "$arg" ]; then
78 dirRollCall["$arg"]="true";
79 if ! [ "$returnState" = "false" ]; then returnState="true"; fi
80 else
81 dirRollCall["$arg"]="false"; returnState="false";
82 fi
83 done
84
85 #===Determine function return code===
86 if [ "$returnState" = "true" ]; then
87 return 0;
88 else
89 return 1;
90 fi
91} # Check that dir exists
92displayMissing() {
93 # Desc: Displays missing apps, files, and dirs
94 # Usage: displayMissing
95 # Version 1.0.0
96 # Input: associative arrays: appRollCall, fileRollCall, dirRollCall
97 # Output: stderr: messages indicating missing apps, file, or dirs
98 # Output: returns exit code 0 if nothing missing; 1 otherwise
99 # Depends: bash 5, checkAppFileDir()
100 local missingApps value appMissing missingFiles fileMissing
101 local missingDirs dirMissing
102
103 #==BEGIN Display errors==
104 #===BEGIN Display Missing Apps===
105 missingApps="Missing apps :";
106 #for key in "${!appRollCall[@]}"; do echo "DEBUG:$key => ${appRollCall[$key]}"; done
107 for key in "${!appRollCall[@]}"; do
108 value="${appRollCall[$key]}";
109 if [ "$value" = "false" ]; then
110 #echo "DEBUG:Missing apps: $key => $value";
111 missingApps="$missingApps""$key ";
112 appMissing="true";
113 fi;
114 done;
115 if [ "$appMissing" = "true" ]; then # Only indicate if an app is missing.
116 echo "$missingApps" 1>&2;
117 fi;
118 unset value;
119 #===END Display Missing Apps===
120
121 #===BEGIN Display Missing Files===
122 missingFiles="Missing files:";
123 #for key in "${!fileRollCall[@]}"; do echo "DEBUG:$key => ${fileRollCall[$key]}"; done
124 for key in "${!fileRollCall[@]}"; do
125 value="${fileRollCall[$key]}";
126 if [ "$value" = "false" ]; then
127 #echo "DEBUG:Missing files: $key => $value";
128 missingFiles="$missingFiles""$key ";
129 fileMissing="true";
130 fi;
131 done;
132 if [ "$fileMissing" = "true" ]; then # Only indicate if an app is missing.
133 echo "$missingFiles" 1>&2;
134 fi;
135 unset value;
136 #===END Display Missing Files===
137
138 #===BEGIN Display Missing Directories===
139 missingDirs="Missing dirs:";
140 #for key in "${!dirRollCall[@]}"; do echo "DEBUG:$key => ${dirRollCall[$key]}"; done
141 for key in "${!dirRollCall[@]}"; do
142 value="${dirRollCall[$key]}";
143 if [ "$value" = "false" ]; then
144 #echo "DEBUG:Missing dirs: $key => $value";
145 missingDirs="$missingDirs""$key ";
146 dirMissing="true";
147 fi;
148 done;
149 if [ "$dirMissing" = "true" ]; then # Only indicate if an dir is missing.
150 echo "$missingDirs" 1>&2;
151 fi;
152 unset value;
153 #===END Display Missing Directories===
154
155 #==END Display errors==
156 #==BEGIN Determine function return code===
157 if [ "$appMissing" == "true" ] || [ "$fileMissing" == "true" ] || [ "$dirMissing" == "true" ]; then
158 return 1;
159 else
160 return 0;
161 fi
162 #==END Determine function return code===
163} # Display missing apps, files, dirs
164get_paths_dothide() {
165 # Desc: Recursively search specified ir for '.hidden' files
166 # Usage: get_paths_dothide arg1
167 # Input: arg1 dir to search
168 # Output: stdout list of paths of '.hidden' files
169
170 local
171 # Check input
172 if [[ $# -ne 1 ]]; then die "FATAL:Arg count does not equal 1:$#"; fi;
173 if [[ ! -d "$1" ]]; then die "FATAL:Not a dir:$1"; fi;
174
175 # Search for files named '.hidden'
9f85673c 176 find "$1" -type f -name ".hidden" 2>/dev/null
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177}; # Return list of paths of '.hidden' files
178
179main() {
180 local -a dirs_target pat_tohide
181
182 # check input
183 # check and specify list of dirs to search
184 for arg in "$@"; do
185 if [[ -d $arg ]]; then
186 dirs_target+=("$arg");
187 else
188 die "FATAL:Not a dir:arg:$arg";
189 fi;
190 done;
e2912511 191 #yell "DEBUG:dirs_target:${dirs_target[*]}";
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192
193 # specify filename regex patterns to mark '.hidden'
194 pat_tohide+=(".ots$");
195 pat_tohide+=(".ots.bak$");
e2912511 196 #yell "DEBUG:pat_tohide:${pat_tohide[*]}";
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197
198 # generate list of paths of '.hidden' files
199 for dir in "${dirs_target[@]}"; do
e2912511 200 #yell "DEBUG:generating list of paths of '.hidden' files in dir:$dir";
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201 while read -r file; do
202 ls_dothide_f+=("$file");
203 done < <(get_paths_dothide "$dir");
204 done;
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205 #yell "DEBUG:ls_dothide_f:${ls_dothide_f[*]}";
206 #yell "DEBUG:";
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207
208 # get list of dirs containing the files
209 while read -r line; do
e2912511 210 #yell "DEBUG:found .hidden file at:$line";
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211 dir="$(dirname "$line")";
212 ls_dothide_d+=("$dir");
213 done < <(printf "%s\n" "${ls_dothide_f[@]}")
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214 #yell "DEBUG:ls_dothide_d:${ls_dothide_d[*]}";
215 #yell "DEBUG:";
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216
217 # for each dir, write list of files to hide in '.hidden'
218 while read -r dir; do
e2912511 219 #yell "DEBUG:performing actions in dir:$dir";
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220 declare -a ls_tohide_fn; # array for filenames to write in '.hidden'
221
222 ## act on each file
223 while read -r file; do
e2912511 224 #yell "DEBUG:considering file:$file";
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225 filename="$(basename "$file")";
226
227 ## check if file is actually a file
228 if [[ ! -f $file ]]; then continue; fi;
229
230 ## check if file should be hidden according to pattern match
231 unset flag_pat_match;
232 while read -r pat; do
233 if [[ $filename =~ $pat ]]; then
234 flag_pat_match="true";
235 break; # don't consider any more patterns for this file
236 else
237 flag_pat_match="false";
238 fi;
239 done < <(printf "%s\n" "${pat_tohide[@]}");
240
241 ## add file to list to add to '.hidden'
242 if [[ $flag_pat_match == "true" ]]; then
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243 #yell "DEBUG:adding to ls_tohide_fn:file:$file":
244 #yell "DEBUG:filename:$filename";
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245 ls_tohide_fn+=("$filename");
246 fi;
e2912511 247 #yell "DEBUG:";
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248
249 ## unset variables defined only for this file
250 unset filename flag_pat_match;
251 done < <(find "$dir" -mindepth 1 -maxdepth 1 -type f 2>/dev/null);
e2912511 252 #yell "DEBUG:";
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253
254 ## add file names to $dir/'.hidden'
255 ### remove blank lines and sort and uniq
256 while read -r line; do
257 ls_tohide_fn_sortuniq+=("$line");
258 done < <(printf "%s\n" "${ls_tohide_fn[@]}" | sed '/^$/d' | sort | uniq);
259 ls_tohide_fn=("${ls_tohide_fn_sortuniq[@]}");
260
261 ### write '.hidden'
262 path_hidefile="$dir"/.hidden;
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263 #yell "DEBUG:Writing contents of .hidden file at path_hidefile:$path_hidefile";
264 #yell "DEBUG:ls_tohide_fn:$(printf "%s\n" "${ls_tohide_fn[@]}" )";
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265 printf "%s\n" "${ls_tohide_fn[@]}" > "$path_hidefile"
266
267 ## unset variables defined only for this dir
268 unset ls_tohide_fn path_hidefile;
269
e2912511 270 #yell "DEBUG:";
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271 done < <(printf "%s\n" "${ls_dothide_d[@]}");
272}; # main program
273
274main "$@";