unitproc/bkdconfwf

   1 #!/bin/bash
   2
   3 # Desc: Writes keys from dconf dump
   4 # Purpose: Applying custom dconf dump without clobbering other keys
   5 # Usage: bkdconfwf [file]
   6 # Note: Useful if 'dconf load [file]' wipes existing settings.
   7
   8 # Yell, Die, Try Three-Fingered Claw technique
   9 # Ref/Attrib: https://stackoverflow.com/a/25515370
  10 yell() { echo "$0: $*" >&2; }
  11 die() { yell "$*"; exit 111; }
  12 try() { "$@" || die "cannot $*"; }
  13
  14 #declare -A LG_AA # Associative Array for dconf <dir/key> and <value>
  15
  16 # Process input file - save <dir/key> & <value> pairs to LG_AA
  17 FILEIN="$1"
  18 cat "$FILEIN" | while read line; do
  19     yell "Begin processing of:$line";
  20     if [[ "$line" == "" ]]; then # Check for non-blank line
  21         yell "Blank line detected.";
  22     elif [[ "$line" =~ ^"["(.*)"]"$ ]]; then # Check for bracket-enclosed string (new line group)
  23         yell "New line group detected at line:$line";
  24         # Note start of new line group
  25         lgNum=0
  26         # Extract path
  27         lgDir="$line";
  28         lgDir="${lgDir#[*}"; # See [2]
  29         lgDir="${lgDir%*]}"; # See [2]
  30         yell "Path is:$lgDir";
  31     elif [[ "$line" =~ (.*)"="(.*) ]]; then # Check for key=value pair
  32         yell "DEBUG:Key value pair detected:$line";
  33         # Extract key
  34         key="${line%%=*}"; # See [1,3]
  35         yell "Key extracted:$key";
  36         # Extract value
  37         value="${line#*=}"; # See [1,3]
  38         yell "Value extracted:$value";
  39         # Add <path/key>=<value> to associative array LG_AA
  40         #yell "DEBUG:LG_AA old:$LG_AA";
  41         #yell "DEBUG:lgDir:$lgDir";
  42         #yell "DEBUG:value:$value";
  43         #LG_AA["$lgDir/$key"]+="'$value' ";
  44         #yell "DEBUG:LG_AA new:${LG_AA[@]}";
  45         # Apply keyvalue pair
  46         try dconf write "/$lgDir/$key" "$value";
  47     else
  48         yell "ERROR:Unrecognized string detected."
  49     fi;
  50     # Increment line group counter
  51     ((lgNum++))
  52     yell "DEBUG:line group number:$lgNum"
  53     yell "Finished processing of:$line";
  54     yell "=============================";
  55 done
  56
  57 # Ref/Attrib
  58 # [1] How to extract substrings around specific character using parameter expansion. chepner. https://stackoverflow.com/a/15149278 https://stackoverflow.com/questions/15148796/get-string-after-character#comment43744397_15149278
  59 # [2] How to extract string from brackets. Alex Howansky. https://stackoverflow.com/a/7209856
  60 # [3] Advanced Bash-Scripting Guide, section 10.1 Manipulating Strings http://tldp.org/LDP/abs/html/string-manipulation.html