user/get_gpgkey_from_gitlog.sh

   1 #!/usr/bin/env bash
   2 # Desc: A script that outputs a list of GPG signatures from git log output
   3 # Usage: get_gpgkey_from_gitlog.sh [dir]
   4 # Input: arg1: directory
   5 # Output: stdout: newline-delimited list of 40-char GPG fingerprints
   6 # Version: 0.0.1
   7
   8 declare -g buffer;
   9
  10 yell() { echo "$0: $*" >&2; } # print script path and all args to stderr
  11 die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status
  12 try() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails
  13 check_args() {
  14     # Desc: Check arguments
  15     if [[ $# -ne 1 ]]; then die "FATAL:Incorrect number of arguments:$#"; fi;
  16     if [[ ! -d $1 ]]; then die "Not a directory:$1"; fi;
  17     return 0;
  18 }; # check args
  19 fill_buffer() {
  20     # Input: arg1: git dir
  21     # Output: var: $buffer: newline-delimited list of gpg fingerprints
  22     pushd "$1" 1>/dev/random || die "FATAL:Failed to change directory:$1";
  23     buffer="$(git log --show-signature 2>&1)";
  24     yell "DEBUG:Buffer has $(wc -l < <(printf "%s" "$buffer")) lines.";
  25     buffer="$(grep -E -- "^gpg:" < <( printf "%s" "$buffer" ) )";
  26     yell "DEBUG:Buffer has $(wc -l < <(printf "%s" "$buffer")) lines.";
  27     buffer="$(grep -Eo "([0-9A-F]){40}" < <( printf "%s" "$buffer" ) )";
  28     yell "DEBUG:Buffer has $(wc -l < <(printf "%s" "$buffer")) lines.";
  29     buffer="$(sort -u < <( printf "%s" "$buffer" ))";
  30     yell "DEBUG:Buffer has $(wc -l < <(printf "%s" "$buffer")) lines.";
  31     popd 1>/dev/random || die "FATAL:Failed to popd.";
  32 }; # fill buffer with git gpg lines
  33 main() {
  34     check_args "$@";
  35     fill_buffer "$1";
  36     printf "%s\n" "$buffer";
  37     return 0;
  38 };
  39
  40 main "$@";
  41
  42 # git log --show-signature 2>&1 | grep -E -- "^gpg:" | grep -Eo "([0-9A-F]){40}" | sort -u