feat(user/bkots):Optimize with GNU Parallel for executing commands

[BK-2020-03.git] / unitproc / bktemp-appendArgTar

diff --git a/unitproc/bktemp-appendArgTar b/unitproc/bktemp-appendArgTar
index ee3174392278697a76a78e1e3ca1f4d862b26534..eadf6485b248b39c18d515f5b054e919c700796f 100644 (file)
--- a/unitproc/bktemp-appendArgTar
+++ b/unitproc/bktemp-appendArgTar
@@ -8,7 +8,7 @@ try() { "$@" || die "cannot $*"; }
 appendArgTar(){
     # Desc: Writes first argument to temporary file with arguments as options, then appends file to tar
     # Usage: appendArgTar "$(echo "Data to be written.")" [name of file to be inserted] [tar path] [temp dir] ([cmd1] [cmd2] [cmd3] [cmd4]...)
-    # Version: 1.0.1
+    # 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)
@@ -19,49 +19,58 @@ appendArgTar(){
     #          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
+    # Depends: bash 5, tar 1, yell()
+    # Ref/Attrib: Using 'eval' to construct command strings https://askubuntu.com/a/476533
+
+    local fn fileName tarPath tmpDir cmd0 cmd1 cmd2 cmd3 cmd4
 
     # Save function name
-    local FN="${FUNCNAME[0]}";
-    #yell "DEBUG:STATUS:$FN:Finished appendArgTar()."
+    fn="${FUNCNAME[0]}";
+    #yell "DEBUG:STATUS:$fn:Finished appendArgTar()."
     
     # Set file name
-    if ! [ -z "$2" ]; then FILENAME="$2"; else yell "ERROR:$FN: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="$3"; else yell "ERROR:$FN: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="$4"; else yell "ERROR:$FN: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
+    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:$FN:CMD1:$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:$FN:TAR_PATH:$TAR_PATH"
-    # yell "DEBUG:STATUS:$FN:TMP_DIR:$TMP_DIR"
+    # 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" "$FILENAME";
-    #yell "DEBUG:STATUS:$FN:Finished appendArgTar()."
+    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