remove accidentally commited swap file

- Fixed: Reduce shellcheck warnings.
- Fixed: Remove trailing whitespace.
- Fixed: Double quote to prevent globbing and word splitting. [SC2086]
- Fixed: Invalid flags are not handled. [SC2220]
- Fixed: Cleaned up string replaces.

tests/t1040-add-priority.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+test_description='test the priority on add feature'
+. ./test-lib.sh
+
+## Normal use case
+echo "export TODOTXT_PRIORITY_ON_ADD=A" >> todo.cfg
+
+test_todo_session 'config file priority' <<EOF
+>>> todo.sh add take out the trash
+1 (A) take out the trash
+TODO: 1 added.
+
+>>> todo.sh -p list
+1 (A) take out the trash
+--
+TODO: 1 of 1 tasks shown
+EOF
+
+## Wrong value in config var
+echo "export TODOTXT_PRIORITY_ON_ADD=1" >> todo.cfg
+
+test_todo_session 'config file wrong priority' <<EOF
+>>> todo.sh add fail to take out the trash
+=== 1
+TODOTXT_PRIORITY_ON_ADD should be a capital letter from A to Z (it is now "1").
+
+>>> todo.sh -p list
+=== 1
+TODOTXT_PRIORITY_ON_ADD should be a capital letter from A to Z (it is now "1").
+EOF
+
+test_done

todo.cfg

@@ -67,6 +67,10 @@ export REPORT_FILE="$TODO_DIR/report.txt"
 # export COLOR_PROJECT=$RED
 # export COLOR_CONTEXT=$RED
 
+# ... and for date extensions (due:yyyy-mm-dd, t:yyyy-mm-dd and again:X)
+#
+# export COLOR_DATEEXT=$LIGHT_BLUE
+
 # === BEHAVIOR ===
 
 ## customize list output

todo.sh

@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/usr/bin/env bash
 
 # === HEAVY LIFTING ===
 shopt -s extglob extquote
@@ -51,7 +51,7 @@ shorthelp()
 		    deduplicate
 		    del|rm ITEM# [TERM]
 		    depri|dp ITEM#[, ITEM#, ITEM#, ...]
-		    do ITEM#[, ITEM#, ITEM#, ...]
+		    done|do ITEM#[, ITEM#, ITEM#, ...]
 		    help [ACTION...]
 		    list|ls [TERM...]
 		    listall|lsa [TERM...]
@@ -134,7 +134,7 @@ help()
 
 	EndOptionsHelp
 
-    [ $TODOTXT_VERBOSE -gt 1 ] && cat <<-'EndVerboseHelp'
+    [ "$TODOTXT_VERBOSE" -gt 1 ] && cat <<-'EndVerboseHelp'
 		  Environment variables:
 		    TODOTXT_AUTO_ARCHIVE            is same as option -a (0)/-A (1)
 		    TODOTXT_CFG_FILE=CONFIG_FILE    is same as option -d CONFIG_FILE
@@ -142,6 +142,7 @@ help()
 		    TODOTXT_PRESERVE_LINE_NUMBERS   is same as option -n (0)/-N (1)
 		    TODOTXT_PLAIN                   is same as option -p (1)/-c (0)
 		    TODOTXT_DATE_ON_ADD             is same as option -t (1)/-T (0)
+		    TODOTXT_PRIORITY_ON_ADD=pri     default priority A-Z
 		    TODOTXT_VERBOSE=1               is same as option -v
 		    TODOTXT_DISABLE_FILTER=1        is same as option -x
 		    TODOTXT_DEFAULT_ACTION=""       run this when called with no arguments
@@ -200,6 +201,7 @@ actionsHelp()
 		      Deprioritizes (removes the priority) from the task(s)
 		      on line ITEM# in todo.txt.
 
+		    done ITEM#[, ITEM#, ITEM#, ...]
 		    do ITEM#[, ITEM#, ITEM#, ...]
 		      Marks task(s) on line ITEM# as done in todo.txt.
 
@@ -292,7 +294,7 @@ addonHelp()
         didPrintAddonActionsHeader=
         for action in "$TODO_ACTIONS_DIR"/*
         do
-            if [ -f "$action" -a -x "$action" ]; then
+            if [ -f "$action" ] && [ -x "$action" ]; then
                 if [ ! "$didPrintAddonActionsHeader" ]; then
                     cat <<-EndAddonActionsHeader
 		  Add-on Actions:
@@ -300,14 +302,14 @@ addonHelp()
                     didPrintAddonActionsHeader=1
                 fi
                 "$action" usage
-            elif [ -d "$action" -a -x "$action/$(basename $action)" ]; then
+            elif [ -d "$action" ] && [ -x "$action"/"$(basename "$action")" ]; then
                 if [ ! "$didPrintAddonActionsHeader" ]; then
                     cat <<-EndAddonActionsHeader
 		  Add-on Actions:
 	EndAddonActionsHeader
                     didPrintAddonActionsHeader=1
                 fi
-                "$action/$(basename $action)" usage
+                "$action"/"$(basename "$action")" usage
             fi
         done
     fi
@@ -318,10 +320,10 @@ actionUsage()
     for actionName
     do
         action="${TODO_ACTIONS_DIR}/${actionName}"
-        if [ -f "$action" -a -x "$action" ]; then
+        if [ -f "$action" ] && [ -x "$action" ]; then
             "$action" usage
-        elif [ -d "$action" -a -x "$action/$(basename $action)" ]; then
-            "$action/$(basename $action)" usage
+        elif [ -d "$action" ] && [ -x "$action"/"$(basename "$action")" ]; then
+            "$action"/"$(basename "$action")" usage
         else
             builtinActionUsage=$(actionsHelp | sed -n -e "/^    ${actionName//\//\\/} /,/^\$/p" -e "/^    ${actionName//\//\\/}$/,/^\$/p")
             if [ "$builtinActionUsage" ]; then
@@ -376,8 +378,9 @@ getPrefix()
     # Parameters:    $1: todo file; empty means $TODO_FILE.
     # Returns:       Uppercase FILE prefix to be used in place of "TODO:" where
     #                a different todo file can be specified.
-    local base=$(basename "${1:-$TODO_FILE}")
-    echo "${base%%.[^.]*}" | tr 'a-z' 'A-Z'
+    local base
+    base=$(basename "${1:-$TODO_FILE}")
+    echo "${base%%.[^.]*}" | tr '[:lower:]' '[:upper:]'
 }
 
 getTodo()
@@ -402,8 +405,8 @@ getNewtodo()
     # Postcondition: $newtodo contains task text.
 
     local item=$1
-    [ -z "$item" ] && die 'Programming error: $item should exist.'
-    [ "${item//[0-9]/}" ] && die 'Programming error: $item should be numeric.'
+    [ -z "$item" ] && die "Programming error: $item should exist."
+    [ "${item//[0-9]/}" ] && die "Programming error: $item should be numeric."
 
     newtodo=$(sed "$item!d" "${2:-$TODO_FILE}")
     [ -z "$newtodo" ] && die "$(getPrefix "$2"): No updated task $item."
@@ -427,7 +430,7 @@ replaceOrPrepend()
 
   if [[ -z "$1" && $TODOTXT_FORCE = 0 ]]; then
     echo -n "$querytext"
-    read -e -r input
+    read -r -i "$todo" -e input
   else
     input=$*
   fi
@@ -437,7 +440,7 @@ replaceOrPrepend()
   priority=$(sed -e "$item!d" -e "${item}s/${priAndDateExpr}.*/\\1/" "$TODO_FILE")
   prepdate=$(sed -e "$item!d" -e "${item}s/${priAndDateExpr}.*/\\2/" "$TODO_FILE")
 
-  if [ "$prepdate" -a "$action" = "replace" ] && [ "$(echo "$input"|sed -e "s/${priAndDateExpr}.*/\\1\\2/")" ]; then
+  if [ "$prepdate" ] && [ "$action" = "replace" ] && [ "$(echo "$input"|sed -e "s/${priAndDateExpr}.*/\\1\\2/")" ]; then
       # If the replaced text starts with a [priority +] date, it will replace
       # the existing date, too.
     prepdate=
@@ -448,7 +451,7 @@ replaceOrPrepend()
   # date again.
   cleaninput "for sed"
   sed -i.bak -e "$item s/^${priority}${prepdate}//" -e "$item s|^.*|${priority}${prepdate}${input}${backref}|" "$TODO_FILE"
-  if [ $TODOTXT_VERBOSE -gt 0 ]; then
+  if [ "$TODOTXT_VERBOSE" -gt 0 ]; then
     getNewtodo "$item"
     case "$action" in
       replace)
@@ -473,7 +476,7 @@ uppercasePriority()
     do
         upperPriority="${upperPriority};s/^[(]${lower[i]}[)]/(${upper[i]})/"
     done
-    input=$(echo "$input" | sed $upperPriority)
+    input=$(echo "$input" | sed "$upperPriority")
 }
 
 #Preserving environment variables so they don't get clobbered by the config file
@@ -482,6 +485,7 @@ OVR_TODOTXT_FORCE="$TODOTXT_FORCE"
 OVR_TODOTXT_PRESERVE_LINE_NUMBERS="$TODOTXT_PRESERVE_LINE_NUMBERS"
 OVR_TODOTXT_PLAIN="$TODOTXT_PLAIN"
 OVR_TODOTXT_DATE_ON_ADD="$TODOTXT_DATE_ON_ADD"
+OVR_TODOTXT_PRIORITY_ON_ADD="$TODOTXT_PRIORITY_ON_ADD"
 OVR_TODOTXT_DISABLE_FILTER="$TODOTXT_DISABLE_FILTER"
 OVR_TODOTXT_VERBOSE="$TODOTXT_VERBOSE"
 OVR_TODOTXT_DEFAULT_ACTION="$TODOTXT_DEFAULT_ACTION"
@@ -489,7 +493,7 @@ OVR_TODOTXT_SORT_COMMAND="$TODOTXT_SORT_COMMAND"
 OVR_TODOTXT_FINAL_FILTER="$TODOTXT_FINAL_FILTER"
 
 # Prevent GREP_OPTIONS from malforming grep's output
-GREP_OPTIONS=""
+export GREP_OPTIONS=""
 
 # == PROCESS OPTIONS ==
 while getopts ":fhpcnNaAtTvVx+@Pd:" Option
@@ -502,7 +506,7 @@ do
         ##   number shows context names and an odd number hides context
         ##   names.
         : $(( HIDE_CONTEXT_NAMES++ ))
-        if [ $(( $HIDE_CONTEXT_NAMES % 2 )) -eq 0 ]
+        if [ $(( HIDE_CONTEXT_NAMES % 2 )) -eq 0 ]
         then
             ## Zero or even value -- show context names
             unset HIDE_CONTEXTS_SUBSTITUTION
@@ -518,7 +522,7 @@ do
         ##   number shows project names and an odd number hides project
         ##   names.
         : $(( HIDE_PROJECT_NAMES++ ))
-        if [ $(( $HIDE_PROJECT_NAMES % 2 )) -eq 0 ]
+        if [ $(( HIDE_PROJECT_NAMES % 2 )) -eq 0 ]
         then
             ## Zero or even value -- show project names
             unset HIDE_PROJECTS_SUBSTITUTION
@@ -565,7 +569,7 @@ do
         ##   number shows priority labels and an odd number hides priority
         ##   labels.
         : $(( HIDE_PRIORITY_LABELS++ ))
-        if [ $(( $HIDE_PRIORITY_LABELS % 2 )) -eq 0 ]
+        if [ $(( HIDE_PRIORITY_LABELS % 2 )) -eq 0 ]
         then
             ## Zero or even value -- show priority labels
             unset HIDE_PRIORITY_SUBSTITUTION
@@ -589,9 +593,12 @@ do
     x)
         OVR_TODOTXT_DISABLE_FILTER=1
         ;;
+    *)
+        usage
+        ;;
   esac
 done
-shift $(($OPTIND - 1))
+shift $((OPTIND - 1))
 
 # defaults if not yet defined
 TODOTXT_VERBOSE=${TODOTXT_VERBOSE:-1}
@@ -601,6 +608,7 @@ TODOTXT_FORCE=${TODOTXT_FORCE:-0}
 TODOTXT_PRESERVE_LINE_NUMBERS=${TODOTXT_PRESERVE_LINE_NUMBERS:-1}
 TODOTXT_AUTO_ARCHIVE=${TODOTXT_AUTO_ARCHIVE:-1}
 TODOTXT_DATE_ON_ADD=${TODOTXT_DATE_ON_ADD:-0}
+TODOTXT_PRIORITY_ON_ADD=${TODOTXT_PRIORITY_ON_ADD:-}
 TODOTXT_DEFAULT_ACTION=${TODOTXT_DEFAULT_ACTION:-}
 TODOTXT_SORT_COMMAND=${TODOTXT_SORT_COMMAND:-env LC_COLLATE=C sort -f -k2}
 TODOTXT_DISABLE_FILTER=${TODOTXT_DISABLE_FILTER:-}
@@ -608,7 +616,7 @@ TODOTXT_FINAL_FILTER=${TODOTXT_FINAL_FILTER:-cat}
 TODOTXT_GLOBAL_CFG_FILE=${TODOTXT_GLOBAL_CFG_FILE:-/etc/todo/config}
 
 # Export all TODOTXT_* variables
-export ${!TODOTXT_@}
+export "${!TODOTXT_@}"
 
 # Default color map
 export NONE=''
@@ -636,9 +644,10 @@ export PRI_B=$GREEN         # color for B priority
 export PRI_C=$LIGHT_BLUE    # color for C priority
 export PRI_X=$WHITE         # color unless explicitly defined
 
-# Default project and context colors.
+# Default project, context and dateext colors.
 export COLOR_PROJECT=$NONE
 export COLOR_CONTEXT=$NONE
+export COLOR_DATEEXT=$NONE
 
 # Default highlight colors.
 export COLOR_DONE=$LIGHT_GREY   # color for done (but not yet archived) tasks
@@ -695,7 +704,7 @@ export SENTENCE_DELIMITERS=',.:;'
 }
 
 
-if [ -z "$TODO_ACTIONS_DIR" -o ! -d "$TODO_ACTIONS_DIR" ]
+if [ -z "$TODO_ACTIONS_DIR" ] || [ ! -d "$TODO_ACTIONS_DIR" ]
 then
     TODO_ACTIONS_DIR="$HOME/.todo/actions"
     export TODO_ACTIONS_DIR
@@ -740,6 +749,9 @@ fi
 if [ -n "$OVR_TODOTXT_DATE_ON_ADD" ] ; then
   TODOTXT_DATE_ON_ADD="$OVR_TODOTXT_DATE_ON_ADD"
 fi
+if [ -n "$OVR_TODOTXT_PRIORITY_ON_ADD" ] ; then
+    TODOTXT_PRIORITY_ON_ADD="$OVR_TODOTXT_PRIORITY_ON_ADD"
+fi
 if [ -n "$OVR_TODOTXT_DISABLE_FILTER" ] ; then
   TODOTXT_DISABLE_FILTER="$OVR_TODOTXT_DISABLE_FILTER"
 fi
@@ -759,16 +771,19 @@ fi
 ACTION=${1:-$TODOTXT_DEFAULT_ACTION}
 
 [ -z "$ACTION" ]    && usage
-[ -d "$TODO_DIR" ]  || mkdir -p $TODO_DIR 2> /dev/null || dieWithHelp "$1" "Fatal Error: $TODO_DIR is not a directory"
+[ -d "$TODO_DIR" ]  || mkdir -p "$TODO_DIR" 2> /dev/null || dieWithHelp "$1" "Fatal Error: $TODO_DIR is not a directory"
 ( cd "$TODO_DIR" )  || dieWithHelp "$1" "Fatal Error: Unable to cd to $TODO_DIR"
+[ -z "$TODOTXT_PRIORITY_ON_ADD" ] \
+    || echo "$TODOTXT_PRIORITY_ON_ADD" | grep -q "^[A-Z]$" \
+    || die "TODOTXT_PRIORITY_ON_ADD should be a capital letter from A to Z (it is now \"$TODOTXT_PRIORITY_ON_ADD\")."
 
-[ -f "$TODO_FILE" -o -c "$TODO_FILE" ] || > "$TODO_FILE"
-[ -f "$DONE_FILE" -o -c "$DONE_FILE" ] || > "$DONE_FILE"
-[ -f "$REPORT_FILE" -o -c "$REPORT_FILE" ] || > "$REPORT_FILE"
+[ -f "$TODO_FILE" ] || [ -c "$TODO_FILE" ] || > "$TODO_FILE"
+[ -f "$DONE_FILE" ] || [ -c "$DONE_FILE" ] || > "$DONE_FILE"
+[ -f "$REPORT_FILE" ] || [ -c "$REPORT_FILE" ] || > "$REPORT_FILE"
 
 if [ $TODOTXT_PLAIN = 1 ]; then
     for clr in ${!PRI_@}; do
-        export $clr=$NONE
+        export "$clr"=$NONE
     done
     PRI_X=$NONE
     DEFAULT=$NONE
@@ -786,12 +801,17 @@ _addto() {
     cleaninput
     uppercasePriority
 
-    if [[ $TODOTXT_DATE_ON_ADD = 1 ]]; then
+    if [[ "$TODOTXT_DATE_ON_ADD" -eq 1 ]]; then
         now=$(date '+%Y-%m-%d')
         input=$(echo "$input" | sed -e 's/^\(([A-Z]) \)\{0,1\}/\1'"$now /")
     fi
+    if [[ -n "$TODOTXT_PRIORITY_ON_ADD" ]]; then
+        if ! echo "$input" | grep -q '^([A-Z])'; then
+            input=$(echo -n "($TODOTXT_PRIORITY_ON_ADD) " ; echo "$input")
+        fi
+    fi
     echo "$input" >> "$file"
-    if [ $TODOTXT_VERBOSE -gt 0 ]; then
+    if [ "$TODOTXT_VERBOSE" -gt 0 ]; then
         TASKNUM=$(sed -n '$ =' "$file")
         echo "$TASKNUM $input"
         echo "$(getPrefix "$file"): $TASKNUM added."
@@ -859,7 +879,7 @@ _list() {
 
     _format "$src" '' "$@"
 
-    if [ $TODOTXT_VERBOSE -gt 0 ]; then
+    if [ "$TODOTXT_VERBOSE" -gt 0 ]; then
         echo "--"
         echo "$(getPrefix "$src"): ${NUMTASKS:-0} of ${TOTALTASKS:-0} tasks shown"
     fi
@@ -919,7 +939,7 @@ _format()
             s/^  /00/;
             s/^ /0/;
           ''' \
-        | eval ${TODOTXT_SORT_COMMAND}                                        \
+        | eval "${TODOTXT_SORT_COMMAND}" \
         | awk '''
             function highlight(colorVar,      color) {
                 color = ENVIRON[colorVar]
@@ -945,6 +965,9 @@ _format()
                 ctx_beg = highlight("COLOR_CONTEXT")
                 ctx_end = (ctx_beg ? (highlight("DEFAULT") clr) : "")
 
+                dtx_beg = highlight("COLOR_DATEEXT")
+                dtx_end = (dtx_beg ? (highlight("DEFAULT") clr) : "")
+
                 gsub(/[ \t][ \t]*/, "\n&\n")
                 len = split($0, words, /\n/)
 
@@ -954,6 +977,8 @@ _format()
                         printf "%s", prj_beg words[i] prj_end
                     } else if (words[i] ~ /^[@].*[A-Za-z0-9_]$/) {
                         printf "%s", ctx_beg words[i] ctx_end
+                    } else if (words[i] ~ /^(due|t|again):/) {
+                        printf "%s", dtx_beg words[i] dtx_end
                     }  else {
                         printf "%s", words[i]
                     }
@@ -970,11 +995,11 @@ _format()
     )
     [ "$filtered_items" ] && echo "$filtered_items"
 
-    if [ $TODOTXT_VERBOSE -gt 0 ]; then
+    if [ "$TODOTXT_VERBOSE" -gt 0 ]; then
         NUMTASKS=$( echo -n "$filtered_items" | sed -n '$ =' )
         TOTALTASKS=$( echo -n "$items" | sed -n '$ =' )
     fi
-    if [ $TODOTXT_VERBOSE -gt 1 ]; then
+    if [ "$TODOTXT_VERBOSE" -gt 1 ]; then
         echo "TODO DEBUG: Filter Command was: ${filter_command:-cat}"
     fi
 }
@@ -992,7 +1017,7 @@ listWordsWithSigil()
 export -f cleaninput getPrefix getTodo getNewtodo shellquote filtercommand _list listWordsWithSigil getPadding _format die
 
 # == HANDLE ACTION ==
-action=$( printf "%s\n" "$ACTION" | tr 'A-Z' 'a-z' )
+action=$( printf "%s\n" "$ACTION" | tr '[:upper:]' '[:lower:]' )
 
 ## If the first argument is "command", run the rest of the arguments
 ## using todo.sh builtins.
@@ -1003,12 +1028,12 @@ then
     ## Get rid of "command" from arguments list
     shift
     ## Reset action to new first argument
-    action=$( printf "%s\n" "$1" | tr 'A-Z' 'a-z' )
-elif [ -d "$TODO_ACTIONS_DIR/$action" -a -x "$TODO_ACTIONS_DIR/$action/$action" ]
+    action=$( printf "%s\n" "$1" | tr '[:upper:]' '[:lower:]' )
+elif [ -d "$TODO_ACTIONS_DIR/$action" ] && [ -x "$TODO_ACTIONS_DIR/$action/$action" ]
 then
     "$TODO_ACTIONS_DIR/$action/$action" "$@"
     exit $?
-elif [ -d "$TODO_ACTIONS_DIR" -a -x "$TODO_ACTIONS_DIR/$action" ]
+elif [ -d "$TODO_ACTIONS_DIR" ] && [ -x "$TODO_ACTIONS_DIR/$action" ]
 then
     "$TODO_ACTIONS_DIR/$action" "$@"
     exit $?
@@ -1082,8 +1107,8 @@ case $action in
     esac
     cleaninput "for sed"
 
-    if sed -i.bak $item" s|^.*|&${appendspace}${input}|" "$TODO_FILE"; then
-        if [ $TODOTXT_VERBOSE -gt 0 ]; then
+    if sed -i.bak "${item} s|^.*|&${appendspace}${input}|" "$TODO_FILE"; then
+        if [ "$TODOTXT_VERBOSE" -gt 0 ]; then
             getNewtodo "$item"
             echo "$item $newtodo"
 	fi
@@ -1095,10 +1120,10 @@ case $action in
 "archive" )
     # defragment blank lines
     sed -i.bak -e '/./!d' "$TODO_FILE"
-    [ $TODOTXT_VERBOSE -gt 0 ] && grep "^x " "$TODO_FILE"
+    [ "$TODOTXT_VERBOSE" -gt 0 ] && grep "^x " "$TODO_FILE"
     grep "^x " "$TODO_FILE" >> "$DONE_FILE"
     sed -i.bak '/^x /d' "$TODO_FILE"
-    if [ $TODOTXT_VERBOSE -gt 0 ]; then
+    if [ "$TODOTXT_VERBOSE" -gt 0 ]; then
 	echo "TODO: $TODO_FILE archived."
     fi
     ;;
@@ -1119,12 +1144,12 @@ case $action in
         if [ "$ANSWER" = "y" ]; then
             if [ $TODOTXT_PRESERVE_LINE_NUMBERS = 0 ]; then
                 # delete line (changes line numbers)
-                sed -i.bak -e $item"s/^.*//" -e '/./!d' "$TODO_FILE"
+                sed -i.bak -e "${item}s/^.*//" -e '/./!d' "$TODO_FILE"
             else
                 # leave blank line behind (preserves line numbers)
-                sed -i.bak -e $item"s/^.*//" "$TODO_FILE"
+                sed -i.bak -e "${item}s/^.*//" "$TODO_FILE"
             fi
-            if [ $TODOTXT_VERBOSE -gt 0 ]; then
+            if [ "$TODOTXT_VERBOSE" -gt 0 ]; then
                 echo "$item $todo"
                 echo "TODO: $item deleted."
             fi
@@ -1133,18 +1158,18 @@ case $action in
         fi
     else
         sed -i.bak \
-            -e $item"s/^\((.) \)\{0,1\} *$3 */\1/g" \
-            -e $item"s/ *$3 *\$//g" \
-            -e $item"s/  *$3 */ /g" \
-            -e $item"s/ *$3  */ /g" \
-            -e $item"s/$3//g" \
+            -e "${item}s/^\((.) \)\{0,1\} *$3 */\1/g" \
+            -e "${item}s/ *$3 *\$//g" \
+            -e "${item}s/  *$3 */ /g" \
+            -e "${item}s/ *$3  */ /g" \
+            -e "${item}s/$3//g" \
             "$TODO_FILE"
         getNewtodo "$item"
         if [ "$todo" = "$newtodo" ]; then
-            [ $TODOTXT_VERBOSE -gt 0 ] && echo "$item $todo"
+            [ "$TODOTXT_VERBOSE" -gt 0 ] && echo "$item $todo"
             die "TODO: '$3' not found; no removal done."
         fi
-        if [ $TODOTXT_VERBOSE -gt 0 ]; then
+        if [ "$TODOTXT_VERBOSE" -gt 0 ]; then
             echo "$item $todo"
             echo "TODO: Removed '$3' from task."
             echo "$item $newtodo"
@@ -1163,8 +1188,8 @@ case $action in
         getTodo "$item"
 
 	if [[ "$todo" = \(?\)\ * ]]; then
-	    sed -i.bak -e $item"s/^(.) //" "$TODO_FILE"
-	    if [ $TODOTXT_VERBOSE -gt 0 ]; then
+	    sed -i.bak -e "${item}s/^(.) //" "$TODO_FILE"
+	    if [ "$TODOTXT_VERBOSE" -gt 0 ]; then
 		getNewtodo "$item"
 		echo "$item $newtodo"
 		echo "TODO: $item deprioritized."
@@ -1175,7 +1200,7 @@ case $action in
     done
     ;;
 
-"do" )
+"do" | "done" )
     errmsg="usage: $TODO_SH do ITEM#[, ITEM#, ITEM#, ...]"
     # shift so we get arguments to the do request
     shift;
@@ -1190,9 +1215,9 @@ case $action in
         if [ "${todo:0:2}" != "x " ]; then
             now=$(date '+%Y-%m-%d')
             # remove priority once item is done
-            sed -i.bak $item"s/^(.) //" "$TODO_FILE"
-            sed -i.bak $item"s|^|x $now |" "$TODO_FILE"
-            if [ $TODOTXT_VERBOSE -gt 0 ]; then
+            sed -i.bak "${item}s/^(.) //" "$TODO_FILE"
+            sed -i.bak "${item}s|^|x $now |" "$TODO_FILE"
+            if [ "$TODOTXT_VERBOSE" -gt 0 ]; then
                 getNewtodo "$item"
                 echo "$item $newtodo"
                 echo "TODO: $item marked as done."
@@ -1249,7 +1274,7 @@ case $action in
     post_filter_command="${post_filter_command:-}${post_filter_command:+ | }awk -v TOTAL=$TOTAL -v PADDING=$PADDING '{ \$1 = sprintf(\"%\" PADDING \"d\", (\$1 > TOTAL ? 0 : \$1)); print }' "
     cat "$TODO_FILE" "$DONE_FILE" | TODOTXT_VERBOSE=0 _format '' "$PADDING" "$@"
 
-    if [ $TODOTXT_VERBOSE -gt 0 ]; then
+    if [ "$TODOTXT_VERBOSE" -gt 0 ]; then
         TDONE=$( sed -n '$ =' "$DONE_FILE" )
         TASKNUM=$(TODOTXT_PLAIN=1 TODOTXT_VERBOSE=0 _format "$TODO_FILE" 1 "$@" | sed -n '$ =')
         DONENUM=$(TODOTXT_PLAIN=1 TODOTXT_VERBOSE=0 _format "$DONE_FILE" 1 "$@" | sed -n '$ =')
@@ -1263,8 +1288,8 @@ case $action in
 "listfile" | "lf" )
     shift  ## Was listfile, next $1 is file name
     if [ $# -eq 0 ]; then
-        [ $TODOTXT_VERBOSE -gt 0 ] && echo "Files in the todo.txt directory:"
-        cd "$TODO_DIR" && ls -1 *.txt
+        [ "$TODOTXT_VERBOSE" -gt 0 ] && echo "Files in the todo.txt directory:"
+        cd "$TODO_DIR" && ls -1 -- *.txt
     else
         FILE="$1"
         shift  ## Was filename; next $1 is first search term
@@ -1286,7 +1311,7 @@ case $action in
 "listpri" | "lsp" )
     shift ## was "listpri", new $1 is priority to list or first TERM
 
-    pri=$(printf "%s\n" "$1" | tr 'a-z' 'A-Z' | grep -e '^[A-Z]$' -e '^[A-Z]-[A-Z]$') && shift || pri="A-Z"
+    pri=$(printf "%s\n" "$1" | tr '[:lower:]' '[:upper:]' | grep -e '^[A-Z]$' -e '^[A-Z]-[A-Z]$') && shift || pri="A-Z"
     post_filter_command="${post_filter_command:-}${post_filter_command:+ | }grep '^ *[0-9]\+ ([${pri}]) '"
     _list "$TODO_FILE" "$@"
     ;;
@@ -1315,14 +1340,14 @@ case $action in
     if [ "$ANSWER" = "y" ]; then
         if [ $TODOTXT_PRESERVE_LINE_NUMBERS = 0 ]; then
             # delete line (changes line numbers)
-            sed -i.bak -e $item"s/^.*//" -e '/./!d' "$src"
+            sed -i.bak -e "${item}s/^.*//" -e '/./!d' "$src"
         else
             # leave blank line behind (preserves line numbers)
-            sed -i.bak -e $item"s/^.*//" "$src"
+            sed -i.bak -e "${item}s/^.*//" "$src"
         fi
         echo "$todo" >> "$dest"
 
-        if [ $TODOTXT_VERBOSE -gt 0 ]; then
+        if [ "$TODOTXT_VERBOSE" -gt 0 ]; then
             echo "$item $todo"
             echo "TODO: $item moved from '$src' to '$dest'."
         fi
@@ -1338,7 +1363,7 @@ case $action in
 
 "pri" | "p" )
     item=$2
-    newpri=$( printf "%s\n" "$3" | tr 'a-z' 'A-Z' )
+    newpri=$( printf "%s\n" "$3" | tr '[:lower:]' '[:upper:]' )
 
     errmsg="usage: $TODO_SH pri ITEM# PRIORITY
 note: PRIORITY must be anywhere from A to Z."
@@ -1353,9 +1378,9 @@ note: PRIORITY must be anywhere from A to Z."
     fi
 
     if [ "$oldpri" != "$newpri" ]; then
-        sed -i.bak -e $item"s/^(.) //" -e $item"s/^/($newpri) /" "$TODO_FILE"
+        sed -i.bak -e "${item}s/^(.) //" -e "${item}s/^/($newpri) /" "$TODO_FILE"
     fi
-    if [ $TODOTXT_VERBOSE -gt 0 ]; then
+    if [ "$TODOTXT_VERBOSE" -gt 0 ]; then
         getNewtodo "$item"
         echo "$item $newtodo"
         if [ "$oldpri" != "$newpri" ]; then
@@ -1389,12 +1414,12 @@ note: PRIORITY must be anywhere from A to Z."
     LASTDATA=${LASTREPORT#* }   # Strip timestamp.
     if [ "$LASTDATA" = "$NEWDATA" ]; then
         echo "$LASTREPORT"
-        [ $TODOTXT_VERBOSE -gt 0 ] && echo "TODO: Report file is up-to-date."
+        [ "$TODOTXT_VERBOSE" -gt 0 ] && echo "TODO: Report file is up-to-date."
     else
         NEWREPORT="$(date +%Y-%m-%dT%T) ${NEWDATA}"
         echo "${NEWREPORT}" >> "$REPORT_FILE"
         echo "${NEWREPORT}"
-        [ $TODOTXT_VERBOSE -gt 0 ] && echo "TODO: Report file updated."
+        [ "$TODOTXT_VERBOSE" -gt 0 ] && echo "TODO: Report file updated."
     fi
     ;;
 
@@ -1447,9 +1472,9 @@ note: PRIORITY must be anywhere from A to Z."
         cd "$TODO_ACTIONS_DIR" || exit $?
         for action in *
         do
-            if [ -f "$action" -a -x "$action" ]; then
+            if [ -f "$action" ] && [ -x "$action" ]; then
                 echo "$action"
-            elif [ -d "$action" -a -x "$action/$action" ]; then
+            elif [ -d "$action" ] && [ -x "$action/$action" ]; then
                 echo "$action"
             fi
         done