read csv files to vars

gaboshlib/g_read_csv.sh

@@ -0,0 +1,78 @@
+function g_read_csv {
+  local g_csvfile="$1"
+  local g_last_lines=$2
+  local g_headline=$3
+  local g_separator=$4
+
+  local g_headline_item i l r g_headline_item_varname
+
+  # check for individual separator
+  [ -z "$g_separator" ] && g_separator=","
+  # only one/first character
+  g_separator=${g_separator:0:1}
+
+  # check given file
+  if ! [ -s "$g_csvfile" ]
+  then
+    g_echo_error "${g_csvfile} does not exist or is empty"
+    return 1
+  fi
+
+  # check for ,
+  if ! grep -q $g_separator "$g_csvfile"
+  then
+    g_echo_error "${g_csvfile} does not contain \",\""
+    return 1
+  fi
+
+  # is there a headline file
+  if [ -z "$g_headline" ]
+  then
+    [ -s "${g_csvfile}.headline" ] && g_headline=$(<"${g_csvfile}.headline")
+  fi
+
+  # if no given headline and no headlinfile use forst line
+  [ -z "$g_headline" ] && g_headline=$(head -n1 "${g_csvfile}")
+
+  # read the headline
+  g_array "$g_headline" g_csv_headline_array_ref $g_separator
+
+  # prepare varnames from headline(s)
+  for g_headline_item in "${g_csv_headline_array_ref[@]}"
+  do
+    #g_csv_headline_array="${g_csv_headline_array_ref//[^a-zA-Z0-9]/}"
+    g_headline_item_varname="${g_headline_item//[^a-zA-Z0-9]/}"
+    echo "$g_headline_item_varname"
+    g_csv_headline_array+=("$g_headline_item_varname")
+  done
+
+  # read last lines if defined or complete csv file
+  if [ -n "$g_last_lines" ]
+  then
+    tail -n $g_last_lines "$g_csvfile" >"${g_tmp}/g_csv_tmp.csv"
+    g_csvfile="${g_tmp}/g_csv_tmp.csv"
+  fi
+
+
+  # read csv file to array
+  g_array "$g_csvfile" g_csv_array_ref
+  g_csv_array=("${g_csv_array_ref[@]}")
+
+  # go reverse through array
+  l=0  
+  for (( r=${#g_csv_array[@]}-1 ; r>=0 ; r-- ))
+  do 
+    g_array "${g_csv_array[r]}" g_csv_line_array ,
+    i=0
+    # put headlines to vars with reverse numbers (last line 0)
+    for g_headline_item in "${g_csv_headline_array[@]}"
+    do
+      declare -g v_${l}_${g_headline_item}="${g_csv_line_array[i]}"
+      # last line to vars without number
+      [ "$l" = 0 ] && declare -g v_${g_headline_item}="${g_csv_line_array[i]}"
+      ((i++))
+    done
+    ((l++))
+  done
+}
+