feat: Add errors counter and compression function. No compression by default.

src/boring-backup

@@ -25,7 +25,11 @@ __pid_file='/tmp/boring-backup.pid'
 __tar_options='-acf'
 __tar_exclude=
 __name_date_fmt='_%Y%m%d-%H%M'
-__compression='gzip'
+__compression=
+__errors_count=0
+__errors_file='/tmp/boring-backup.errors'
+
+echo $__errors_count > $__errors_file
 
 LIBRARY="${LIBRARY:-./lib}"
 
@@ -201,8 +205,16 @@ for script in "${__args[@]}"; do
     unset tar_exclude
 done
 
-log "Backup FINISHED"
+if [[ "$(cat $__errors_file)" != '0' ]]; then
+    echo
+    log -p "Backup [Failed]: Process finished with $(cat $__errors_file) errors."\
+        "See $__log_file for info."
+    rm $__errors_file
+else
     echo -e "\nBackup [Done]"
+fi
+
+log "Backup FINISHED"
 
 # Remove PID file
 rm $__pid_file

src/lib/common.sh

@@ -99,7 +99,12 @@ err() {
 
     # Exit
     if [ "$errexit" ]; then
-        log "Backup ERROR: Exiting with previous errors"; exit 1
+        # Count errors for backup recap
+        __errors_count="$(cat $__errors_file)"
+        ((__errors_count++)) || true
+        echo $__errors_count > "$__errors_file"
+
+        log -p "Backup ERROR: Exiting with previous errors" >&2; exit 1
     fi
 }
 
@@ -111,6 +116,7 @@ try() {
     if eval "$@" 2>> "$__log_file"; then
         return 0 # Success
     else
+        # Count errors
         err -a "Error: Something went wrong when executing command:"
         err -a "    $*"
         err -aeo "Check $__log_file log for details."
@@ -139,3 +145,29 @@ is_function_set() {
     declare -F -- "$1" > /dev/null
     return "$?"
 }
+
+set_compression() {
+    # Set compr_util and file_ext by name.
+
+    # Select compression utility and set filename extension.
+    # Refference: https://www.gnu.org/software/tar/manual/html_node/gzip.html
+    case "$1" in
+        gzip|gz)    file_ext='.gz';      compr_util='gzip';;
+        tgz)        file_ext='.gz';      compr_util='gzip';;
+        taz)        file_ext='.gz';      compr_util='gzip';;
+        compress|Z) file_ext='.Z';       compr_util='compress';;
+        taZ)        file_ext='.Z';       compr_util='compress';;
+        bzip2|bz2)  file_ext='.bz2';     compr_util='bzip2';;
+        tz2)        file_ext='.bz2';     compr_util='bzip2';;
+        tbz2)       file_ext='.bz2';     compr_util='bzip2';;
+        tbz)        file_ext='.bz2';     compr_util='bzip2';;
+        lzip|lz)    file_ext='.lz';      compr_util='lzip';;
+        lzma)       file_ext='.lzma';    compr_util='lzma';;
+        tlz)        file_ext='.lzma';    compr_util='lzma';;
+        lzop|lzo)   file_ext='.lzop';    compr_util='lzop';;
+        xz)         file_ext='.xz';      compr_util='xz';;
+        zstd|zst)   file_ext='.zst';     compr_util='zstd';;
+        tzst)       file_ext='.zst';     compr_util='zstd';;
+        *)          file_ext='';        compr_util='';;  # No compression
+    esac
+}