try() { "$@" || die "cannot $*"; }
appendArgTar(){
# Desc: Writes first argument to temporary file with arguments as options, then appends file to tar
- # Usage: writeArg "$(echo "Data to be written.")" [name of file to be inserted] [tar path] [temp dir] ([cmd1] [cmd2] [cmd3] [cmd4]...)
+ # Usage: appendArgTar "$(echo "Data to be written.")" [name of file to be inserted] [tar path] [temp dir] ([cmd1] [cmd2] [cmd3] [cmd4]...)
+ # Version: 1.0.6
# Input: arg1: data to be written
# arg2: file name of file to be inserted into tar
# arg3: tar archive path (must exist first)
# appendArgTar "$(cat /tmp/largefile1.gpg)" "largefile1" $HOME/archive.tar /tmp "gpg --decrypt" &
# appendArgTar "$(cat /tmp/largefile2.gpg)" "largefile2" $HOME/archive.tar /tmp "gpg --decrypt" &
# appendArgTar "$(cat /tmp/largefile3.gpg)" "largefile3" $HOME/archive.tar /tmp "gpg --decrypt" &
+ # Depends: bash 5, tar 1, yell()
+ # Ref/Attrib: Using 'eval' to construct command strings https://askubuntu.com/a/476533
- # Depends: bash 5
+ local fn fileName tarPath tmpDir cmd0 cmd1 cmd2 cmd3 cmd4
+ # Save function name
+ fn="${FUNCNAME[0]}";
+ #yell "DEBUG:STATUS:$fn:Finished appendArgTar()."
+
# Set file name
- if ! [ -z "$2" ]; then FILENAME="$2"; else yell "ERROR:Not enough arguments."; exit 1; fi
+ if ! [ -z "$2" ]; then fileName="$2"; else yell "ERROR:$fn:Not enough arguments."; exit 1; fi
# Check tar path is a file
- if [ -f "$3" ]; then TAR_PATH="$3"; else yell "ERROR:Tar archive arg not a file."; exit 1; fi
+ if [ -f "$3" ]; then tarPath="$3"; else yell "ERROR:$fn:Tar archive arg not a file."; exit 1; fi
# Check temp dir arg
- if ! [ -z "$4" ]; then TMP_DIR="$3"; else yell "ERROR:No temporary working dir set."; exit 1; fi
+ if ! [ -z "$4" ]; then tmpDir="$4"; else yell "ERROR:$fn:No temporary working dir set."; exit 1; fi
# Set command strings
- if ! [ -z "$5" ]; then CMD1="$5"; else CMD1="tee /dev/null "; fi # command string 1
- if ! [ -z "$6" ]; then CMD2="$6"; else CMD2="tee /dev/null "; fi # command string 2
- if ! [ -z "$7" ]; then CMD3="$7"; else CMD3="tee /dev/null "; fi # command string 3
- if ! [ -z "$8" ]; then CMD4="$8"; else CMD4="tee /dev/null "; fi # command string 4
-
- # Debug
- yell "CMD1:$CMD1"
- yell "CMD2:$CMD2"
- yell "CMD3:$CMD3"
- yell "CMD4:$CMD4"
+ if ! [ -z "$5" ]; then cmd1="$5"; else cmd1="cat "; fi # command string 1
+ if ! [ -z "$6" ]; then cmd2="$6"; else cmd2="cat "; fi # command string 2
+ if ! [ -z "$7" ]; then cmd3="$7"; else cmd3="cat "; fi # command string 3
+ if ! [ -z "$8" ]; then cmd4="$8"; else cmd4="cat "; fi # command string 4
+
+ # Input command
+ cmd0="echo \"\$1\""
+
+ # # Debug
+ # yell "DEBUG:STATUS:$fn:cmd0:$cmd0"
+ # yell "DEBUG:STATUS:$fn:cmd1:$cmd1"
+ # yell "DEBUG:STATUS:$fn:cmd2:$cmd2"
+ # yell "DEBUG:STATUS:$fn:cmd3:$cmd3"
+ # yell "DEBUG:STATUS:$fn:cmd4:$cmd4"
+ # yell "DEBUG:STATUS:$fn:fileName:$fileName"
+ # yell "DEBUG:STATUS:$fn:tarPath:$tarPath"
+ # yell "DEBUG:STATUS:$fn:tmpDir:$tmpDir"
+
# Write to temporary working dir
- echo "$1" | $CMD1 | $CMD2 | $CMD3 | $CMD4 > "$TMP_DIR"/"$FILENAME";
+ eval "$cmd0 | $cmd1 | $cmd2 | $cmd3 | $cmd4" > "$tmpDir"/"$fileName";
# Append to tar
- try tar --append --directory="$TMP_DIR" --file="$TAR_PATH" "$FILENAME";
-
+ try tar --append --directory="$tmpDir" --file="$tarPath" "$fileName";
+ #yell "DEBUG:STATUS:$fn:Finished appendArgTar()."
} # Append Bash var to file appended to Tar archive
#==BEGIN sample code==
-myFile="/tmp/$(date +%s)..original"
-echo "how are you doing?" > "$myFile"
-myVAR="$(cat $myFile)"
-writeArg "$myVAR" "$myFile..LOUD_CHILD" "tee /tmp/cloneityclone " "tr '[:lower:]' '[:upper:]'"
+myTar="/tmp/$(date +%s).tar";
+myTmpDir="/dev/shm"
+try tar --create --file="$myTar" --files-from=/dev/null ;
+myVar="how are you doing?"
+appendArgTar "$myVar" "$(date +%s)..LOUD_insidetar" "$myTar" "$myTmpDir" "tee /tmp/$(date +%s)..outsidetar " "tr '[:lower:]' '[:upper:]'" && \
+ echo "Created $myTar using $myTmpDir as temp working dir."
#==END sample code==
# Author: Steven Baltakatei Sandoval