| 1 | #!/bin/bash |
| 2 | # Desc: Checks that apps, files, or dirs exist. |
| 3 | |
| 4 | #==BEGIN Define script parameters== |
| 5 | #===BEGIN Define variables=== |
| 6 | declare -Ag appRollCall # Associative array for storing app status |
| 7 | declare -Ag fileRollCall # Associative array for storing file status |
| 8 | declare -Ag dirRollCall # Associative array for storing dir status |
| 9 | #===END Define variables=== |
| 10 | |
| 11 | #===BEGIN Declare local script functions=== |
| 12 | checkapp() { |
| 13 | # Desc: If arg is a command, save result in assoc array 'appRollCall' |
| 14 | # Usage: checkapp arg1 arg2 arg3 ... |
| 15 | # Version: 0.1.1 |
| 16 | # Input: global assoc. array 'appRollCall' |
| 17 | # Output: adds/updates key(value) to global assoc array 'appRollCall' |
| 18 | # Depends: bash 5.0.3 |
| 19 | local returnState |
| 20 | |
| 21 | #===Process Args=== |
| 22 | for arg in "$@"; do |
| 23 | if command -v "$arg" 1>/dev/null 2>&1; then # Check if arg is a valid command |
| 24 | appRollCall[$arg]="true"; |
| 25 | if ! [ "$returnState" = "false" ]; then returnState="true"; fi; |
| 26 | else |
| 27 | appRollCall[$arg]="false"; returnState="false"; |
| 28 | fi; |
| 29 | done; |
| 30 | |
| 31 | #===Determine function return code=== |
| 32 | if [ "$returnState" = "true" ]; then |
| 33 | return 0; |
| 34 | else |
| 35 | return 1; |
| 36 | fi; |
| 37 | } # Check that app exists |
| 38 | checkfile() { |
| 39 | # Desc: If arg is a file path, save result in assoc array 'fileRollCall' |
| 40 | # Usage: checkfile arg1 arg2 arg3 ... |
| 41 | # Version: 0.1.2 |
| 42 | # Input: global assoc. array 'fileRollCall' |
| 43 | # Output: adds/updates key(value) to global assoc array 'fileRollCall'; |
| 44 | # Output: returns 0 if app found, 1 otherwise |
| 45 | # Depends: bash 5.0.3 |
| 46 | local returnState |
| 47 | |
| 48 | #===Process Args=== |
| 49 | for arg in "$@"; do |
| 50 | if [ -f "$arg" ]; then |
| 51 | fileRollCall["$arg"]="true"; |
| 52 | if ! [ "$returnState" = "false" ]; then returnState="true"; fi; |
| 53 | elif [ -z "$arg" ]; then |
| 54 | fileRollCall["(no name)"]="false"; returnState="false"; |
| 55 | else |
| 56 | fileRollCall["$arg"]="false"; returnState="false"; |
| 57 | fi; |
| 58 | done; |
| 59 | |
| 60 | #===Determine function return code=== |
| 61 | if [ "$returnState" = "true" ]; then |
| 62 | return 0; |
| 63 | else |
| 64 | return 1; |
| 65 | fi; |
| 66 | } # Check that file exists |
| 67 | checkdir() { |
| 68 | # Desc: If arg is a dir path, save result in assoc array 'dirRollCall' |
| 69 | # Usage: checkdir arg1 arg2 arg3 ... |
| 70 | # Version 0.1.2 |
| 71 | # Input: global assoc. array 'dirRollCall' |
| 72 | # Output: adds/updates key(value) to global assoc array 'dirRollCall'; |
| 73 | # Output: returns 0 if all args are dirs; 1 otherwise |
| 74 | # Depends: Bash 5.0.3 |
| 75 | local returnState |
| 76 | |
| 77 | #===Process Args=== |
| 78 | for arg in "$@"; do |
| 79 | if [ -z "$arg" ]; then |
| 80 | dirRollCall["(Unspecified Dirname(s))"]="false"; returnState="false"; |
| 81 | elif [ -d "$arg" ]; then |
| 82 | dirRollCall["$arg"]="true"; |
| 83 | if ! [ "$returnState" = "false" ]; then returnState="true"; fi |
| 84 | else |
| 85 | dirRollCall["$arg"]="false"; returnState="false"; |
| 86 | fi |
| 87 | done |
| 88 | |
| 89 | #===Determine function return code=== |
| 90 | if [ "$returnState" = "true" ]; then |
| 91 | return 0; |
| 92 | else |
| 93 | return 1; |
| 94 | fi |
| 95 | } # Check that dir exists |
| 96 | displayMissing() { |
| 97 | # Desc: Displays missing apps, files, and dirs |
| 98 | # Usage: displayMissing |
| 99 | # Version 1.0.0 |
| 100 | # Input: associative arrays: appRollCall, fileRollCall, dirRollCall |
| 101 | # Output: stderr: messages indicating missing apps, file, or dirs |
| 102 | # Output: returns exit code 0 if nothing missing; 1 otherwise |
| 103 | # Depends: bash 5, checkAppFileDir() |
| 104 | local missingApps value appMissing missingFiles fileMissing |
| 105 | local missingDirs dirMissing |
| 106 | |
| 107 | #==BEGIN Display errors== |
| 108 | #===BEGIN Display Missing Apps=== |
| 109 | missingApps="Missing apps :"; |
| 110 | #for key in "${!appRollCall[@]}"; do echo "DEBUG:$key => ${appRollCall[$key]}"; done |
| 111 | for key in "${!appRollCall[@]}"; do |
| 112 | value="${appRollCall[$key]}"; |
| 113 | if [ "$value" = "false" ]; then |
| 114 | #echo "DEBUG:Missing apps: $key => $value"; |
| 115 | missingApps="$missingApps""$key "; |
| 116 | appMissing="true"; |
| 117 | fi; |
| 118 | done; |
| 119 | if [ "$appMissing" = "true" ]; then # Only indicate if an app is missing. |
| 120 | echo "$missingApps" 1>&2; |
| 121 | fi; |
| 122 | unset value; |
| 123 | #===END Display Missing Apps=== |
| 124 | |
| 125 | #===BEGIN Display Missing Files=== |
| 126 | missingFiles="Missing files:"; |
| 127 | #for key in "${!fileRollCall[@]}"; do echo "DEBUG:$key => ${fileRollCall[$key]}"; done |
| 128 | for key in "${!fileRollCall[@]}"; do |
| 129 | value="${fileRollCall[$key]}"; |
| 130 | if [ "$value" = "false" ]; then |
| 131 | #echo "DEBUG:Missing files: $key => $value"; |
| 132 | missingFiles="$missingFiles""$key "; |
| 133 | fileMissing="true"; |
| 134 | fi; |
| 135 | done; |
| 136 | if [ "$fileMissing" = "true" ]; then # Only indicate if an app is missing. |
| 137 | echo "$missingFiles" 1>&2; |
| 138 | fi; |
| 139 | unset value; |
| 140 | #===END Display Missing Files=== |
| 141 | |
| 142 | #===BEGIN Display Missing Directories=== |
| 143 | missingDirs="Missing dirs:"; |
| 144 | #for key in "${!dirRollCall[@]}"; do echo "DEBUG:$key => ${dirRollCall[$key]}"; done |
| 145 | for key in "${!dirRollCall[@]}"; do |
| 146 | value="${dirRollCall[$key]}"; |
| 147 | if [ "$value" = "false" ]; then |
| 148 | #echo "DEBUG:Missing dirs: $key => $value"; |
| 149 | missingDirs="$missingDirs""$key "; |
| 150 | dirMissing="true"; |
| 151 | fi; |
| 152 | done; |
| 153 | if [ "$dirMissing" = "true" ]; then # Only indicate if an dir is missing. |
| 154 | echo "$missingDirs" 1>&2; |
| 155 | fi; |
| 156 | unset value; |
| 157 | #===END Display Missing Directories=== |
| 158 | |
| 159 | #==END Display errors== |
| 160 | #==BEGIN Determine function return code=== |
| 161 | if [ "$appMissing" == "true" ] || [ "$fileMissing" == "true" ] || [ "$dirMissing" == "true" ]; then |
| 162 | return 1; |
| 163 | else |
| 164 | return 0; |
| 165 | fi |
| 166 | #==END Determine function return code=== |
| 167 | } # Display missing apps, files, dirs |
| 168 | |
| 169 | #===END Declare local script functions=== |
| 170 | #==END Define script parameters== |
| 171 | |
| 172 | #==BEGIN sample code== |
| 173 | if checkapp cat; then echo "cat found."; fi; |
| 174 | if checkapp gpg; then echo "gpg found."; fi; |
| 175 | if displayMissing 1>/dev/null 2>&1; then |
| 176 | echo "Nothing missing so far..."; |
| 177 | fi; |
| 178 | |
| 179 | if checkapp emaaaacs; then echo "emaaaacs found."; fi; |
| 180 | sleep 1; |
| 181 | if ! displayMissing 1>/dev/null 2>&1; then |
| 182 | echo "Something is missing!"; |
| 183 | displayMissing; |
| 184 | fi; |
| 185 | sleep 1; |
| 186 | myFile=""; if ! checkfile "$myFile"; then echo "An empty argument provided:$myFile"; displayMissing; fi; |
| 187 | #==END sample code== |
| 188 | |
| 189 | # Author: Steven Baltaktei Sandoval |
| 190 | # License: GPLv3+ |