projects / BK-2020-03.git / blame
| Commit | Line | Data |
|---|---|---|
| fdf917e1 SBS |
1 | #!/bin/bash |
| 2 | ||
| 3 | # Date: 2020-02-15T22:23Z | |
| 4 | ||
| 5 | # Author: Steven Baltakatei Sandoval | |
| 6 | ||
| 7 | # Description: `bkgettext` prints text between and including two | |
| 8 | # specified tags. | |
| 9 | ||
| 10 | # Usage: | |
| 11 | # $ bkgettext [ -s tagStart ] [ -e tagEnd ] [ -f file ] | |
| 12 | ||
| 13 | echoerr() { echo "$@" 1>&2; } # function for outputing to stderr; see [3] | |
| 14 | vc() { [ "$OPTION_VERBOSE" == "true" ] && return 0 || return 1; } # returns true if verbose mode active | |
| 15 | print_help() { echoerr "Usage: [ -s tagStart ] [ -e tagEnd ] [ -f file ] "; } # print help | |
| 16 | process_inputs() { | |
| 17 | # echoerr "process_inputs() \$1:""===""$1""===" | |
| 18 | # echoerr "process_inputs() \$2:""===""$2""===" | |
| 19 | # echoerr "process_inputs() \$3:""===""$3""===" | |
| 20 | # echoerr "process_inputs() \$4:""===""$4""===" | |
| 21 | # echoerr "process_inputs() \$5:""===""$5""===" | |
| 22 | # echoerr "process_inputs() \$6:""===""$6""===" | |
| 23 | # echoerr "process_inputs() \$7:""===""$7""===" | |
| 24 | # echoerr "process_inputs() \$8:""===""$8""===" | |
| 25 | ||
| 26 | while getopts "vhs:e:f:" options_array; do | |
| 27 | case "${options_array}" in | |
| 28 | v) | |
| 29 | OPTION_VERBOSE="true" | |
| 30 | vc && echoerr "DEBUG:Verbose mode active." | |
| 31 | ;; | |
| 32 | h) | |
| 33 | print_help; exit 1 | |
| 34 | ;; | |
| 35 | s) | |
| 36 | tagStart=${OPTARG} | |
| 37 | vc && echoerr "DEBUG:tagStart:""$tagStart" | |
| 38 | ;; | |
| 39 | e) | |
| 40 | tagEnd=${OPTARG} | |
| 41 | vc && echoerr "DEBUG:tagEnd:""$tagEnd" | |
| 42 | ;; | |
| 43 | f) | |
| 44 | [ ! -f ${OPTARG} ] && echoerr "ERROR: Invalid file name provided." && exit 1; | |
| 45 | fileInput=${OPTARG} | |
| 46 | vc && echoerr "DEBUG:fileInput:""$fileInput" | |
| 47 | ;; | |
| 48 | *) | |
| 49 | echoerr "Error." | |
| 50 | ;; | |
| 51 | esac | |
| 52 | done | |
| 53 | shift $((OPTIND-1)) | |
| 54 | } | |
| 55 | ||
| 56 | main() { | |
| 57 | ||
| 58 | process_inputs "$@" # Define variables: tagStart tagEnd fileInput | |
| 59 | # echoerr "main() \$1:""===""$1""===" | |
| 60 | # echoerr "main() \$2:""===""$2""===" | |
| 61 | # echoerr "main() \$3:""===""$3""===" | |
| 62 | # echoerr "main() \$4:""===""$4""===" | |
| 63 | # echoerr "main() \$5:""===""$5""===" | |
| 64 | # echoerr "main() \$6:""===""$6""===" | |
| 65 | # echoerr "main() \$7:""===""$7""===" | |
| 66 | # echoerr "main() \$8:""===""$8""===" | |
| 67 | # echoerr "main() \$tagStart:""===""$tagStart""===" | |
| 68 | # echoerr "main() \$tagEnd:""===""$tagEnd""===" | |
| 69 | # echoerr "main() \$fileInput:""===""$fileInput""===" | |
| 70 | #OUTPUT=$(cat "$fileInput" | awk "/$tagStart/,/$tagEnd/") # get text between and including tag lines; see [1] | |
| 71 | #OUTPUT=$(cat "$fileInput" | awk "/$tagStart/{f=1;next} /$tagEnd/{f=0} f") # get text between tag lines; see [1] | |
| 72 | OUTPUT=$(cat "$fileInput" | awk "/$tagStart/{f=1} /$tagEnd/{f=0;print} f") # get text between and including tag lines; see [1] | |
| 73 | echo "$OUTPUT" | |
| 74 | } | |
| 75 | ||
| 76 | main "$@" # pass arguments to function "main" and execute "main" (for why `"$@"`, see [2]) | |
| 77 | exit 0 # exit normally | |
| 78 | ||
| 79 | ||
| 80 | ||
| 81 | #===References=== | |
| 82 | # [1]: How to get text between and including specified strings: https://stackoverflow.com/a/22222219 | |
| 83 | # [2]: How to correctly pass bash script arguments to functions: https://stackoverflow.com/a/8198970 | |
| 84 | # [3]: How to print text to stderr instead of stdout: https://stackoverflow.com/a/2990533 |