| | 1 | #!/bin/bash |
| | 2 | |
| | 3 | # Desc: Records gps data until midnight |
| | 4 | # Author: Steven Baltakatei Sandoval; License: GPLv3+ |
| | 5 | # Usage: bkgpslog --output [output dir] |
| | 6 | |
| | 7 | #==BEGIN Define script parameters== |
| | 8 | PATH="/opt/bktei:$PATH" # Add default baltakatei script install directory to PATH (necessary for other bk scripts) |
| | 9 | SCRIPT_HOSTNAME=$(hostname) # Save hostname of system running this script. |
| | 10 | SCRIPT_VERSION="bkgpslog 0.0.1" # Define version of script. |
| | 11 | SCRIPT_TIME_SHORT="$(date +%Y%m%dT%H%M%S%z)" # Save current date & time in ISO-8601 format. |
| | 12 | SCRIPT_DATE_SHORT="$(date +%Y%m%d)" # Save current date in ISO-8601 format. |
| | 13 | |
| | 14 | declare -Ag appRollCall # Associative array for storing app status |
| | 15 | declare -Ag fileRollCall # Associative array for storing file status |
| | 16 | declare -Ag dirRollCall # Associative array for storing dir status |
| | 17 | declare -a recPubKeys # for processArguments function |
| | 18 | declare recipients # for main function |
| | 19 | |
| | 20 | #===BEGIN Declare local script functions=== |
| | 21 | checkapp() { |
| | 22 | # Desc: If arg is a command, save result in assoc array 'appRollCall' |
| | 23 | # Usage: checkapp arg1 arg2 arg3 ... |
| | 24 | # Input: global assoc. array 'appRollCall' |
| | 25 | # Output: adds/updates key(value) to global assoc array 'appRollCall' |
| | 26 | local returnState |
| | 27 | #echo "DEBUG:$(date +%S.%N)..Starting checkapp function." |
| | 28 | #echo "DEBUG:args: $@" |
| | 29 | #echo "DEBUG:returnState:$returnState" |
| | 30 | |
| | 31 | #===Process Args=== |
| | 32 | for arg in "$@"; do |
| | 33 | #echo "DEBUG:processing arg:$arg" |
| | 34 | if command -v "$arg" 1>/dev/null 2>&1; then # Check if arg is a valid command |
| | 35 | appRollCall[$arg]="true"; |
| | 36 | #echo "DEBUG:appRollCall[$arg]:"${appRollCall[$arg]} |
| | 37 | if ! [ "$returnState" = "false" ]; then returnState="true"; fi |
| | 38 | else |
| | 39 | appRollCall[$arg]="false"; returnState="false"; |
| | 40 | fi |
| | 41 | done |
| | 42 | |
| | 43 | #for key in "${!appRollCall[@]}"; do echo "DEBUG:$key => ${appRollCall[$key]}"; done |
| | 44 | #echo "DEBUG:evaluating returnstate. returnState:"$returnState |
| | 45 | |
| | 46 | #===Determine function return code=== |
| | 47 | if [ "$returnState" = "true" ]; then |
| | 48 | #echo "DEBUG:checkapp returns true for $arg"; |
| | 49 | return 0; |
| | 50 | else |
| | 51 | #echo "DEBUG:checkapp returns false for $arg"; |
| | 52 | return 1; |
| | 53 | fi |
| | 54 | } # Check that app exists |
| | 55 | checkfile() { |
| | 56 | # Desc: If arg is a file path, save result in assoc array 'fileRollCall' |
| | 57 | # Usage: checkfile arg1 arg2 arg3 ... |
| | 58 | # Input: global assoc. array 'fileRollCall' |
| | 59 | # Output: adds/updates key(value) to global assoc array 'fileRollCall'; |
| | 60 | # Output: returns 0 if app found, 1 otherwise |
| | 61 | local returnState |
| | 62 | |
| | 63 | #===Process Args=== |
| | 64 | for arg in "$@"; do |
| | 65 | #echo "DEBUG:processing arg:$arg" |
| | 66 | if [ -f "$arg" ]; then |
| | 67 | fileRollCall["$arg"]="true"; |
| | 68 | #echo "DEBUG:fileRollCall[\"$arg\"]:"${fileRollCall["$arg"]} |
| | 69 | if ! [ "$returnState" = "false" ]; then returnState="true"; fi |
| | 70 | else |
| | 71 | fileRollCall["$arg"]="false"; returnState="false"; |
| | 72 | fi |
| | 73 | done |
| | 74 | |
| | 75 | #for key in "${!fileRollCall[@]}"; do echo "DEBUG:fileRollCall key [$key] is:${fileRollCall[$key]}"; done |
| | 76 | #echo "DEBUG:evaluating returnstate. returnState:"$returnState |
| | 77 | |
| | 78 | #===Determine function return code=== |
| | 79 | if [ "$returnState" = "true" ]; then |
| | 80 | #echo "DEBUG:checkapp returns true for $arg"; |
| | 81 | return 0; |
| | 82 | else |
| | 83 | #echo "DEBUG:checkapp returns false for $arg"; |
| | 84 | return 1; |
| | 85 | fi |
| | 86 | } # Check that file exists |
| | 87 | checkdir() { |
| | 88 | # Desc: If arg is a dir path, save result in assoc array 'dirRollCall' |
| | 89 | # Usage: checkdir arg1 arg2 arg3 ... |
| | 90 | # Input: global assoc. array 'dirRollCall' |
| | 91 | # Output: adds/updates key(value) to global assoc array 'dirRollCall'; |
| | 92 | # Output: returns 0 if app found, 1 otherwise |
| | 93 | local returnState |
| | 94 | |
| | 95 | #===Process Args=== |
| | 96 | for arg in "$@"; do |
| | 97 | #echo "DEBUG:processing arg:$arg" |
| | 98 | if [ -d "$arg" ]; then |
| | 99 | dirRollCall["$arg"]="true"; |
| | 100 | #echo "DEBUG:dirRollCall[\"$arg\"]:"${dirRollCall["$arg"]} |
| | 101 | if ! [ "$returnState" = "false" ]; then returnState="true"; fi |
| | 102 | elif [ "$arg" = "" ]; then |
| | 103 | dirRollCall["$arg"]="false"; returnState="false"; |
| | 104 | else |
| | 105 | returnState="false"; |
| | 106 | fi |
| | 107 | done |
| | 108 | |
| | 109 | #for key in "${!dirRollCall[@]}"; do echo "DEBUG:dirRollCall key [$key] is:${dirRollCall[$key]}"; done |
| | 110 | #echo "DEBUG:evaluating returnstate. returnState:"$returnState |
| | 111 | |
| | 112 | #===Determine function return code=== |
| | 113 | if [ "$returnState" = "true" ]; then |
| | 114 | #echo "DEBUG:checkapp returns true for $arg"; |
| | 115 | return 0; |
| | 116 | else |
| | 117 | #echo "DEBUG:checkapp returns false for $arg"; |
| | 118 | return 1; |
| | 119 | fi |
| | 120 | } # Check that dir exists |
| | 121 | |
| | 122 | # Yell, Die, Try Three-Fingered Claw technique |
| | 123 | # Ref/Attrib: https://stackoverflow.com/a/25515370 |
| | 124 | yell() { echo "$0: $*" >&2; } |
| | 125 | die() { yell "$*"; exit 111; } |
| | 126 | try() { "$@" || die "cannot $*"; } |
| | 127 | |
| | 128 | echoerr() { |
| | 129 | echo "$@" 1>&2; # Define stderr echo function. |
| | 130 | } # Define stderr message function. |
| | 131 | showUsage() { |
| | 132 | echoerr "USAGE:" |
| | 133 | echoerr " bkgpslog [ options ]" |
| | 134 | echoerr |
| | 135 | echoerr "OPTIONS:" |
| | 136 | echoerr " -h, --help" |
| | 137 | echoerr " Display help information." |
| | 138 | echoerr |
| | 139 | echoerr " --version" |
| | 140 | echoerr " Display script version." |
| | 141 | echoerr |
| | 142 | echoerr " -v, --verbose" |
| | 143 | echoerr " Display debugging info." |
| | 144 | echoerr |
| | 145 | echoerr " -e, --encrypt" |
| | 146 | echoerr " Encrypt output." |
| | 147 | echoerr |
| | 148 | echoerr " -r, --recipient [ pubkey string ]" |
| | 149 | echoerr " Specify recipient." |
| | 150 | echoerr |
| | 151 | echoerr " -o, --output [ directory ]" |
| | 152 | echoerr " Specify output directory to save logs." |
| | 153 | echoerr |
| | 154 | echoerr " -c, --compress" |
| | 155 | echoerr " Compress output with gzip (before encryption if enabled)." |
| | 156 | echoerr |
| | 157 | echoerr "EXAMPLE: (bash script lines)" |
| | 158 | echoerr "/bin/bash bkgpslog -e -c \\" |
| | 159 | echoerr "-r age1mrmfnwhtlprn4jquex0ukmwcm7y2nxlphuzgsgv8ew2k9mewy3rs8u7su5 \\" |
| | 160 | echoerr "-r age1ala848kqrvxc88rzaauc6vc5v0fqrvef9dxyk79m0vjea3hagclswu0lgq \\" |
| | 161 | echoerr "-o ~/Sync/Location" |
| | 162 | } # Display information on how to use this script. |
| | 163 | showVersion() { |
| | 164 | echoerr "$SCRIPT_VERSION" |
| | 165 | } # Display script version. |
| | 166 | vbm() { |
| | 167 | # Usage: vbm "DEBUG:verbose message here" |
| | 168 | # Description: Prints verbose message ("vbm") to stderr if OPTION_VERBOSE is set to "true". |
| | 169 | # Input: |
| | 170 | # - OPTION_VERBOSE variable set by processArguments function. (ex: "true", "false") |
| | 171 | # - "$@" positional arguments fed to this function. |
| | 172 | # Output: stderr |
| | 173 | # Script function dependencies: echoerr |
| | 174 | # External function dependencies: echo |
| | 175 | # Last modified: 2020-04-11T23:57Z |
| | 176 | # Last modified by: Steven Baltakatei Sandoval |
| | 177 | # License: GPLv3+ |
| | 178 | # Ref./Attrib: |
| | 179 | |
| | 180 | if [ "$OPTION_VERBOSE" = "true" ]; then |
| | 181 | FUNCTION_TIME=$(date --iso-8601=ns); # Save current time in nano seconds. |
| | 182 | echoerr "[$FUNCTION_TIME] ""$*"; # Display argument text. |
| | 183 | fi |
| | 184 | |
| | 185 | # End function |
| | 186 | return 0; # Function finished. |
| | 187 | } # Verbose message display function. |
| | 188 | processArguments() { |
| | 189 | while [ ! $# -eq 0 ]; do # While number of arguments ($#) is not (!) equal to (-eq) zero (0). |
| | 190 | #echoerr "DEBUG:Starting processArguments while loop." |
| | 191 | #echoerr "DEBUG:Provided arguments are:""$*" |
| | 192 | case "$1" in |
| | 193 | -h | --help) showUsage; exit 1;; # Display usage. |
| | 194 | --version) showVersion; exit 1;; # Show version |
| | 195 | -v | --verbose) OPTION_VERBOSE="true"; vbm "DEBUG:Verbose mode enabled.";; # Enable verbose mode. |
| | 196 | -o | --output) if [ -d "$2" ]; then DIROUT="$2"; vbm "DEBUG:DIROUT:$DIROUT"; shift; fi ;; # Define output directory. |
| | 197 | -e | --encrypt) OPTION_ENCRYPT="true"; vbm "DEBUG:Encrypted output mode enabled.";; |
| | 198 | -r | --recipient) # Add 'age' recipient via public key string |
| | 199 | recPubKeys+=("$2"); vbm "pubkey added:""$2"; shift;; |
| | 200 | -c | --compress) OPTION_COMPRESS="true"; vbm "DEBUG:Compressed output mode enabled.";; |
| | 201 | *) echoerr "ERROR: Unrecognized argument."; exit 1;; # Handle unrecognized options. |
| | 202 | esac |
| | 203 | shift |
| | 204 | done |
| | 205 | } # Argument Processing |
| | 206 | timeUntilNextDay(){ |
| | 207 | # Desc: Report seconds until next day. |
| | 208 | # Output: stdout: integer seconds until next day |
| | 209 | # Output: exit code 0 if stdout > 0; 1 if stdout = 0; 2 if stdout < 0 |
| | 210 | # Usage: timeUntilNextDay |
| | 211 | # Usage: if ! myTTL="$(timeUntilNextDay)"; then yell "ERROR in if statement"; exit 1; fi |
| | 212 | local returnState TIME_CURRENT TIME_NEXT_DAY SECONDS_UNTIL_NEXT_DAY |
| | 213 | TIME_CURRENT="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second. |
| | 214 | TIME_NEXT_DAY="$(date -d "$TIME_CURRENT next day" --iso-8601=date)"; # Produce timestamp of beginning of tomorrow with resolution of 1 second. |
| | 215 | SECONDS_UNTIL_NEXT_DAY="$(( $(date +%s -d "$TIME_NEXT_DAY") - $(date +%s -d "$TIME_CURRENT") ))" ; # Calculate seconds until closest future midnight (res. 1 second). |
| | 216 | if [[ "$SECONDS_UNTIL_NEXT_DAY" -gt 0 ]]; then |
| | 217 | returnState="true"; |
| | 218 | elif [[ "$SECONDS_UNTIL_NEXT_DAY" -eq 0 ]]; then |
| | 219 | returnState="WARNING_ZERO"; |
| | 220 | yell "WARNING:Reported time until next day exactly zero."; |
| | 221 | elif [[ "$SECONDS_UNTIL_NEXT_DAY" -lt 0 ]]; then |
| | 222 | returnState="WARNING_NEGATIVE"; |
| | 223 | yell "WARNING:Reported time until next day is negative."; |
| | 224 | fi |
| | 225 | |
| | 226 | try echo "$SECONDS_UNTIL_NEXT_DAY"; # Report |
| | 227 | |
| | 228 | #===Determine function return code=== |
| | 229 | if [[ "$returnState" = "true" ]]; then |
| | 230 | return 0; |
| | 231 | elif [[ "$returnState" = "WARNING_ZERO" ]]; then |
| | 232 | return 1; |
| | 233 | elif [[ "$returnState" = "WARNING_NEGATIVE" ]]; then |
| | 234 | return 2; |
| | 235 | fi |
| | 236 | } # Report seconds until next day |
| | 237 | timeUntilNextHour(){ |
| | 238 | # Desc: Report seconds until next hour |
| | 239 | # Output: stdout: integer seconds until next hour |
| | 240 | # Output: exit code 0 if stdout > 0; 1 if stdout = 0; 2 if stdout < 0 |
| | 241 | # Usage: timeUntilNextHour |
| | 242 | # Usage: if ! myTTL="$(timeUntilNextHour)"; then yell "ERROR in if statement"; exit 1; fi |
| | 243 | local returnState TIME_CURRENT TIME_NEXT_HOUR SECONDS_UNTIL_NEXT_HOUR |
| | 244 | TIME_CURRENT="$(date --iso-8601=seconds)"; # Produce `date`-parsable current timestamp with resolution of 1 second. |
| | 245 | TIME_NEXT_HOUR="$(date -d "$TIME_CURRENT next hour" --iso-8601=hours)"; # Produce `date`-parsable current time stamp with resolution of 1 second. |
| | 246 | SECONDS_UNTIL_NEXT_HOUR="$(( $(date +%s -d "$TIME_NEXT_HOUR") - $(date +%s -d "$TIME_CURRENT") ))"; # Calculate seconds until next hour (res. 1 second). |
| | 247 | if [[ "$SECONDS_UNTIL_NEXT_HOUR" -gt 0 ]]; then |
| | 248 | returnState="true"; |
| | 249 | elif [[ "$SECONDS_UNTIL_NEXT_HOUR" -eq 0 ]]; then |
| | 250 | returnState="WARNING_ZERO"; |
| | 251 | yell "WARNING:Reported time until next hour exactly zero."; |
| | 252 | elif [[ "$SECONDS_UNTIL_NEXT_HOUR" -lt 0 ]]; then |
| | 253 | returnState="WARNING_NEGATIVE"; |
| | 254 | yell "WARNING:Reported time until next hour is negative."; |
| | 255 | fi |
| | 256 | |
| | 257 | try echo "$SECONDS_UNTIL_NEXT_HOUR"; # Report |
| | 258 | |
| | 259 | #===Determine function return code=== |
| | 260 | if [[ "$returnState" = "true" ]]; then |
| | 261 | return 0; |
| | 262 | elif [[ "$returnState" = "WARNING_ZERO" ]]; then |
| | 263 | return 1; |
| | 264 | elif [[ "$returnState" = "WARNING_NEGATIVE" ]]; then |
| | 265 | return 2; |
| | 266 | fi |
| | 267 | } # Report seconds until next hour |
| | 268 | dateTimeShort(){ |
| | 269 | # Desc: Timestamp without separators (YYYYmmddTHHMMSS+zzzz) |
| | 270 | # Usage: dateTimeShort |
| | 271 | # Output: stdout: timestamp (ISO-8601, no separators) |
| | 272 | local TIME_CURRENT TIME_CURRENT_SHORT |
| | 273 | TIME_CURRENT="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second. |
| | 274 | TIME_CURRENT_SHORT="$(date -d "$TIME_CURRENT" +%Y%m%dT%H%M%S%z)"; # Produce separator-less current timestamp with resolution 1 second. |
| | 275 | echo "$TIME_CURRENT_SHORT"; |
| | 276 | } # Get date&time without separators |
| | 277 | main() { |
| | 278 | processArguments "$@" # Process arguments. |
| | 279 | if [[ "$OPTION_ENCRYPT" = "true" ]]; then # Check if encryption option active. |
| | 280 | if checkapp age; then # Check that age is available. |
| | 281 | for pubkey in "${recPubKeys[@]}"; do # Validate recipient pubkey strings by forming test message |
| | 282 | vbm "DEBUG:Testing pubkey string:$pubkey" |
| | 283 | if echo "butts" | age -a -r "$pubkey" 1>/dev/null; then |
| | 284 | # Form age recipient string |
| | 285 | recipients="$recipients""-r $pubkey "; |
| | 286 | vbm "Added pubkey for forming age recipient string:""$pubkey"; |
| | 287 | vbm "DEBUG:recipients:""$recipients"; |
| | 288 | else |
| | 289 | yell "ERROR:Exit code ""$?"". Invalid recipient pubkey string. Exiting."; exit 1; |
| | 290 | fi |
| | 291 | done |
| | 292 | vbm "DEBUG:Finished processing recPubKeys array"; |
| | 293 | # Form age command string |
| | 294 | CMD_ENCRYPT=" | age ""$recipients "; |
| | 295 | CMD_ENCRYPT_SUFFIX=".age"; |
| | 296 | else |
| | 297 | yell "ERROR:Encryption enabled but \"age\" not found. Exiting."; exit 1; |
| | 298 | fi |
| | 299 | else |
| | 300 | CMD_ENCRYPT=""; |
| | 301 | CMD_ENCRYPT_SUFFIX=""; |
| | 302 | vbm "DEBUG:Encryption not enabled." |
| | 303 | fi |
| | 304 | |
| | 305 | if [[ "$OPTION_COMPRESS" = "true" ]]; then # Check if compression option active |
| | 306 | if checkapp gzip; then # Check if gzip available |
| | 307 | CMD_COMPRESS=" | gzip "; |
| | 308 | CMD_COMPRESS_SUFFIX=".gz"; |
| | 309 | else |
| | 310 | yell "ERROR:Compression enabled but \"gzip\" not found. Exiting."; exit 1; |
| | 311 | fi |
| | 312 | else |
| | 313 | CMD_COMPRESS=""; |
| | 314 | CMD_COMPRESS_SUFFIX=""; |
| | 315 | vbm "DEBUG:Compression not enabled." |
| | 316 | fi |
| | 317 | |
| | 318 | |
| | 319 | if checkapp gpspipe && checkdir "$DIROUT"; then |
| | 320 | |
| | 321 | # # Set script lifespan to end at start of next day |
| | 322 | # if ! scriptTTL="$(timeUntilNextDay)"; then |
| | 323 | # if [[ "$scriptTTL" -eq 0 ]]; then |
| | 324 | # ((scriptTTL++)); # Add 1 because 0 would cause 'timeout' to never timeout. |
| | 325 | # else |
| | 326 | # yell "ERROR: timeUntilNextDay exit code $?"; exit 1; |
| | 327 | # fi; |
| | 328 | # fi; |
| | 329 | |
| | 330 | # Set script lifespan to end at start of next hour |
| | 331 | if ! scriptTTL="$(timeUntilNextHour)"; then |
| | 332 | if [[ "$scriptTTL" -eq 0 ]]; then |
| | 333 | ((scriptTTL++)); # Add 1 because 0 would cause 'timeout' to never timeout. |
| | 334 | else |
| | 335 | yell "ERROR: timeUntilNextHour exit code $?"; exit 1; |
| | 336 | fi; |
| | 337 | fi; |
| | 338 | |
| | 339 | # Determine buffer lifespan |
| | 340 | bufferTTL="60"; |
| | 341 | |
| | 342 | # Record gps data until script lifespan ends |
| | 343 | declare debugCounter; debugCounter="0" |
| | 344 | while [[ "$SECONDS" -lt "$scriptTTL" ]]; do |
| | 345 | ((debugCounter++)) |
| | 346 | # Determine output file paths (time is start of buffer period) |
| | 347 | FILEOUT_BASENAME="$(dateTimeShort)""--P""$bufferTTL""S..""$SCRIPT_HOSTNAME""_location" ; # ISO-8601 YYYYmmddTHHMMSS+zzP[$bufferTTL]S |
| | 348 | FILEOUT_NMEA="$FILEOUT_BASENAME".nmea"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" ; |
| | 349 | FILEOUT_GPX="$FILEOUT_BASENAME".gpx"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" ; |
| | 350 | FILEOUT_KML="$FILEOUT_BASENAME".kml"$CMD_COMPRESS_SUFFIX""$CMD_ENCRYPT_SUFFIX" ; |
| | 351 | # Define GPS conversion commands |
| | 352 | CMD_CONV_NMEA="" |
| | 353 | CMD_CONV_GPX=" | gpsbabel -i nmea -f - -o gpx -F - " |
| | 354 | CMD_CONV_KML=" | gpsbabel -i nmea -f - -o kml -F - " |
| | 355 | # Fill buffer |
| | 356 | buffer="$(timeout "$bufferTTL""s" gpspipe -r)"; # Record gpspipe nmea data to buffer for bufferTTL seconds |
| | 357 | # Construct processing and save command string |
| | 358 | CMD_NMEA=" echo \"\$buffer\" $CMD_CONV_NMEA $CMD_COMPRESS $CMD_ENCRYPT > $DIROUT/$FILEOUT_NMEA"; vbm "DEBUG:CMD_NMEA:$CMD_NMEA" |
| | 359 | CMD_GPX=" echo \"\$buffer\" $CMD_CONV_GPX $CMD_COMPRESS $CMD_ENCRYPT > $DIROUT/$FILEOUT_GPX"; vbm "DEBUG:CMD_GPX:$CMD_GPX" |
| | 360 | CMD_KML=" echo \"\$buffer\" $CMD_CONV_KML $CMD_COMPRESS $CMD_ENCRYPT > $DIROUT/$FILEOUT_KML"; vbm "DEBUG:CMD_KML:$CMD_KML" |
| | 361 | # Execute processing and save command string |
| | 362 | $CMD_NMEA & # Save NMEA format |
| | 363 | $CMD_GPX & # Save GPX format |
| | 364 | $CMD_KML & # Save KML format |
| | 365 | vbm "DEBUG:Completed buffer session $debugCounter ." 1>&2; |
| | 366 | # Reset buffer and filenames |
| | 367 | unset buffer FILEOUT_BASENAME FILEOUT_NMEA FILEOUT_GPX FILEOUT_KML; |
| | 368 | done |
| | 369 | fi |
| | 370 | } # Main function. |
| | 371 | #===END Declare local script functions=== |
| | 372 | #==END Define script parameters== |
| | 373 | |
| | 374 | |
| | 375 | #==BEGIN Perform work and exit== |
| | 376 | main "$@" # Run main function. |
| | 377 | exit 0; |
| | 378 | #==END Perform work and exit== |
| | 379 | |
| | 380 | |
| | 381 | |
| | 382 | #gpspipe -r -d -l -o "$DIROUT1"/"$FILEOUT1" ; |
projects / EVA-2020-02.git / blame_incremental