mytarc/mytarx: Add an option for no compression

When archiving audio or video files, the content is already compressed,
and there is no point in trying to compress it again. Creating a simple
.tar archive is more appropriate in that case.

In mytarc, add an option (-n) so that the archive is not compressed
(create .tar instead of .tar.xz).

In mytarx, check the extension of the archive, and extract accordingly.
Signed-off-by: Cédric Marie <cedric@hjuvi.fr.eu.org>

scripts/mytarc

 #!/bin/sh
 
-# mytarc - Create an archive (.tar.xz file) with the content of a directory
+# mytarc - Create an archive (.tar[.xz] file) with the content of a directory
 # This file is part of Painted Shell - Shell configuration and scripts.
 #
 # Written in 2013-2019 by Cédric Marie
@@ -17,22 +17,25 @@ print_usage()
 {
     command=$(basename $0)
     printf "Usage: $command [OPTION]... DIRECTORY\n"
-    printf "Create an archive (.tar.xz[.enc] file) with the content of a directory.\n\n"
+    printf "Create an archive (.tar[.xz][.enc] file) with the content of a directory.\n\n"
     printf "Options:\n"
     printf "  -h  display this message\n"
+    printf "  -n  don't compress (create .tar instead of .tar.xz)\n"
     printf "  -t  timestamp output file\n"
     printf "  -e  encrypt output file with password\n"
     printf "  -s  create a .sha256sum file\n"
 }
 
+option_dontcompress=0
 option_timestamp=0
 option_encrypt=0
 option_sha256sum=0
 # Get options from command line
-while getopts htes OPT
+while getopts hntes OPT
 do
     case $OPT in
         h) print_usage; exit 0;;
+        n) option_dontcompress=1;;
         t) option_timestamp=1;;
         e) option_encrypt=1;;
         s) option_sha256sum=1;;
@@ -42,11 +45,18 @@ done
 shift $(($OPTIND - 1))
 
 if [ "$1" = "" -o ! -d "$1" ]; then print_usage; exit 1; fi
+if [ $option_dontcompress -eq 1 ]; then
+    file_ext=tar
+    tar_opt=
+else
+    file_ext=tar.xz
+    tar_opt=J
+fi
 dir=${1%/}
 if [ $option_timestamp -eq 1 ]; then
-    file=$dir.`date +%F.%Hh%Mm%Ss`.tar.xz
+    file=$dir.`date +%F.%Hh%Mm%Ss`.${file_ext}
 else
-    file=$dir.tar.xz
+    file=$dir.${file_ext}
 fi
 [ -e "$file" ] && printf "$file already exists\n" && exit 1
 if [ $option_encrypt -eq 1 ]; then
@@ -55,7 +65,8 @@ if [ $option_encrypt -eq 1 ]; then
 else
     output_file=$file
 fi
-tar -Jcvf $file $dir
+printf "\033[1mCreate archive...\033[0m\n"
+tar -${tar_opt}cvf $file $dir
 if [ $option_encrypt -eq 1 ]; then
     openssl aes-256-cbc -pbkdf2 -e -a -salt -in $file -out $output_file
     rm -f $file

scripts/mytarx

 #!/bin/sh
 
-# mytarx - Extract an archive (.tar.xz file)
+# mytarx - Extract an archive (.tar[.xz] file)
 # This file is part of Painted Shell - Shell configuration and scripts.
 #
 # Written in 2013-2019 by Cédric Marie
@@ -17,7 +17,7 @@ print_usage()
 {
     command=$(basename $0)
     printf "Usage: $command [OPTION]... FILE\n"
-    printf "Extract an archive (.tar.xz[.enc] file).\n\n"
+    printf "Extract an archive (.tar[.xz][.enc] file).\n\n"
     printf "Options:\n"
     printf "  -h  display this message\n"
 }
@@ -36,6 +36,7 @@ option_crypt=0
 
 if [ "$1" = "" -o ! -f "$1" ]; then print_usage; exit 1; fi
 if [ -f "${1}.sha256sum" ]; then
+    printf "\033[1mCheck sha256sum...\033[0m\n"
     sha256sum -c ${1}.sha256sum || exit 1;
 fi
 file=${1%.enc}
@@ -43,13 +44,24 @@ if [ "$file" != "$1" ]; then
     option_crypt=1
     [ -e "$file" ] && printf "$file already exists\n" && exit 1
 fi
-dir=${file%.tar.xz}
-[ "$dir" = "$file" ] && print_usage && exit 1
+dir_tar_xz=${file%.tar.xz}
+dir_tar=${file%.tar}
+if [ "$dir_tar_xz" != "$file" ]; then
+    dir=$dir_tar_xz
+    tar_opt=J
+elif [ "$dir_tar" != "$file" ]; then
+    dir=$dir_tar
+    tar_opt=
+else
+    print_usage
+    exit 1
+fi
+printf "\033[1mExtract archive...\033[0m\n"
 dir=${dir%.*-*-*.*h*m*s}
 [ -e "$dir" ] && printf "$dir already exists\n" && exit 1
 if [ $option_crypt -eq 1 ]; then
     openssl aes-256-cbc -pbkdf2 -d -a -in $1 -out $file
 fi
-tar -Jxvf $file
+tar -${tar_opt}xvf $file
 [ $option_crypt -eq 1 ] && rm -f $file
 printf "\033[1mOutput directory:\033[0m $dir\n"