[BK-2020-03.git] / unitproc / bkdconfwf

#!/bin/bash

# Desc: Writes keys from dconf dump
# Purpose: Applying custom dconf dump without clobbering other keys
# Usage: bkdconfwf [file]
# Note: Useful if 'dconf load [file]' wipes existing settings.

# Yell, Die, Try Three-Fingered Claw technique
# Ref/Attrib: https://stackoverflow.com/a/25515370
yell() { echo "$0: $*" >&2; }
die() { yell "$*"; exit 111; }
try() { "$@" || die "cannot $*"; }

#declare -A LG_AA # Associative Array for dconf <dir/key> and <value>

# Process input file - save <dir/key> & <value> pairs to LG_AA
FILEIN="$1"
cat "$FILEIN" | while read line; do
    yell "Begin processing of:$line";
    if [[ "$line" == "" ]]; then # Check for non-blank line
	yell "Blank line detected.";
    elif [[ "$line" =~ ^"["(.*)"]"$ ]]; then # Check for bracket-enclosed string (new line group)
	yell "New line group detected at line:$line";
	# Note start of new line group
	lgNum=0
	# Extract path
        lgDir="$line";
	lgDir="${lgDir#[*}"; # See [2]
	lgDir="${lgDir%*]}"; # See [2]
	yell "Path is:$lgDir";
    elif [[ "$line" =~ (.*)"="(.*) ]]; then # Check for key=value pair
	yell "DEBUG:Key value pair detected:$line";
	# Extract key
	key="${line%%=*}"; # See [1,3]
	yell "Key extracted:$key";
	# Extract value
	value="${line#*=}"; # See [1,3]
	yell "Value extracted:$value";
	# Add <path/key>=<value> to associative array LG_AA
	#yell "DEBUG:LG_AA old:$LG_AA";
	#yell "DEBUG:lgDir:$lgDir";
	#yell "DEBUG:value:$value";
	#LG_AA["$lgDir/$key"]+="'$value' ";
	#yell "DEBUG:LG_AA new:${LG_AA[@]}";
	# Apply keyvalue pair
	try dconf write "/$lgDir/$key" "$value";
    else
	yell "ERROR:Unrecognized string detected."
    fi;
    # Increment line group counter
    ((lgNum++)) 
    yell "DEBUG:line group number:$lgNum"
    yell "Finished processing of:$line";
    yell "=============================";
done

# Ref/Attrib
# [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
# [2] How to extract string from brackets. Alex Howansky. https://stackoverflow.com/a/7209856
# [3] Advanced Bash-Scripting Guide, section 10.1 Manipulating Strings http://tldp.org/LDP/abs/html/string-manipulation.html
Commit	Line	Data
bbe7e165 SBS	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