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dotfiles / todo-txt / todo.sh

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#! /bin/bash

# === HEAVY LIFTING ===
shopt -s extglob extquote

# NOTE:  Todo.sh requires the .todo/config configuration file to run.
# Place the .todo/config file in your home directory or use the -d option for a custom location.

[ -f VERSION-FILE ] && . VERSION-FILE || VERSION="2.8"
version() {
    cat <<-EndVersion
		TODO.TXT Command Line Interface v$VERSION

		First release: 5/11/2006
		Original conception by: Gina Trapani (http://ginatrapani.org)
		Contributors: http://github.com/ginatrapani/todo.txt-cli/network
		License: GPL, http://www.gnu.org/copyleft/gpl.html
		More information and mailing list at http://todotxt.com
		Code repository: http://github.com/ginatrapani/todo.txt-cli/tree/master
	EndVersion
    exit 1
}

# Set script name and full path early.
TODO_SH=$(basename "$0")
TODO_FULL_SH="$0"
export TODO_SH TODO_FULL_SH

oneline_usage="$TODO_SH [-fhpantvV] [-d todo_config] action [task_number] [task_description]"

usage()
{
    cat <<-EndUsage
		Usage: $oneline_usage
		Try '$TODO_SH -h' for more information.
	EndUsage
    exit 1
}

shorthelp()
{
    cat <<-EndHelp
		  Usage: $oneline_usage

		  Actions:
		    add|a "THING I NEED TO DO +project @context"
		    addto DEST "TEXT TO ADD"
		    addm "THINGS I NEED TO DO
		          MORE THINGS I NEED TO DO"
		    append|app ITEM# "TEXT TO APPEND"
		    archive
		    command [ACTIONS]
		    del|rm ITEM# [TERM]
		    dp|depri ITEM#[, ITEM#, ITEM#, ...]
		    do ITEM#[, ITEM#, ITEM#, ...]
		    help
		    list|ls [TERM...]
		    listall|lsa [TERM...]
		    listcon|lsc
		    listfile|lf SRC [TERM...]
		    listpri|lsp [PRIORITY] [TERM...]
		    listproj|lsprj
		    move|mv ITEM# DEST [SRC]
		    prepend|prep ITEM# "TEXT TO PREPEND"
		    pri|p ITEM# PRIORITY
		    replace ITEM# "UPDATED TODO"
		    report

		  See "help" for more details.
	EndHelp
    exit 0
}

help()
{
    cat <<-EndHelp
		  Usage: $oneline_usage

		  Actions:
		    add "THING I NEED TO DO +project @context"
		    a "THING I NEED TO DO +project @context"
		      Adds THING I NEED TO DO to your todo.txt file on its own line.
		      Project and context notation optional.
		      Quotes optional.

		    addm "FIRST THING I NEED TO DO +project1 @context
		    SECOND THING I NEED TO DO +project2 @context"
		      Adds FIRST THING I NEED TO DO to your todo.txt on its own line and
		      Adds SECOND THING I NEED TO DO to you todo.txt on its own line.
		      Project and context notation optional.
		      Quotes optional.

		    addto DEST "TEXT TO ADD"
		      Adds a line of text to any file located in the todo.txt directory.
		      For example, addto inbox.txt "decide about vacation"

		    append ITEM# "TEXT TO APPEND"
		    app ITEM# "TEXT TO APPEND"
		      Adds TEXT TO APPEND to the end of the task on line ITEM#.
		      Quotes optional.

		    archive
		      Moves all done tasks from todo.txt to done.txt and removes blank lines.

		    command [ACTIONS]
		      Runs the remaining arguments using only todo.sh builtins.
		      Will not call any .todo.actions.d scripts.

		    del ITEM# [TERM]
		    rm ITEM# [TERM]
		      Deletes the task on line ITEM# in todo.txt.
		      If TERM specified, deletes only TERM from the task.

		    depri ITEM#[, ITEM#, ITEM#, ...]
		    dp ITEM#[, ITEM#, ITEM#, ...]
		      Deprioritizes (removes the priority) from the task(s)
		      on line ITEM# in todo.txt.

		    do ITEM#[, ITEM#, ITEM#, ...]
		      Marks task(s) on line ITEM# as done in todo.txt.

		    help
		      Display this help message.

		    list [TERM...]
		    ls [TERM...]
		      Displays all tasks that contain TERM(s) sorted by priority with line
		      numbers.  If no TERM specified, lists entire todo.txt.

		    listall [TERM...]
		    lsa [TERM...]
		      Displays all the lines in todo.txt AND done.txt that contain TERM(s)
		      sorted by priority with line  numbers.  If no TERM specified, lists
		      entire todo.txt AND done.txt concatenated and sorted.

		    listcon
		    lsc
		      Lists all the task contexts that start with the @ sign in todo.txt.

		    listfile SRC [TERM...]
		    lf SRC [TERM...]
		      Displays all the lines in SRC file located in the todo.txt directory,
		      sorted by priority with line  numbers.  If TERM specified, lists
		      all lines that contain TERM in SRC file.

		    listpri [PRIORITY] [TERM...]
		    lsp [PRIORITY] [TERM...]
		      Displays all tasks prioritized PRIORITY.
		      If no PRIORITY specified, lists all prioritized tasks.
		      If TERM specified, lists only prioritized tasks that contain TERM.

		    listproj
		    lsprj
		      Lists all the projects that start with the + sign in todo.txt.

		    move ITEM# DEST [SRC]
		    mv ITEM# DEST [SRC]
		      Moves a line from source text file (SRC) to destination text file (DEST).
		      Both source and destination file must be located in the directory defined
		      in the configuration directory.  When SRC is not defined
		      it's by default todo.txt.

		    prepend ITEM# "TEXT TO PREPEND"
		    prep ITEM# "TEXT TO PREPEND"
		      Adds TEXT TO PREPEND to the beginning of the task on line ITEM#.
		      Quotes optional.

		    pri ITEM# PRIORITY
		    p ITEM# PRIORITY
		      Adds PRIORITY to task on line ITEM#.  If the task is already
		      prioritized, replaces current priority with new PRIORITY.
		      PRIORITY must be an uppercase letter between A and Z.

		    replace ITEM# "UPDATED TODO"
		      Replaces task on line ITEM# with UPDATED TODO.

		    report
		      Adds the number of open tasks and done tasks to report.txt.



		  Options:
		    -@
		        Hide context names in list output. Use twice to show context
		        names (default).
		    -+
		        Hide project names in list output. Use twice to show project
		        names (default).
		    -c
		        Color mode
		    -d CONFIG_FILE
		        Use a configuration file other than the default ~/.todo/config
		    -f
		        Forces actions without confirmation or interactive input
		    -h
		        Display a short help message
		    -p
		        Plain mode turns off colors
		    -P
		        Hide priority labels in list output. Use twice to show
		        priority labels (default).
		    -a
		        Don't auto-archive tasks automatically on completion
		    -A
		        Auto-archive tasks automatically on completion
		    -n
		        Don't preserve line numbers; automatically remove blank lines
		        on task deletion
		    -N
		        Preserve line numbers
		    -t
		        Prepend the current date to a task automatically
		        when it's added.
		    -T
		        Do not prepend the current date to a task automatically
		        when it's added.
		    -v
		        Verbose mode turns on confirmation messages
		    -vv
		        Extra verbose mode prints some debugging information
		    -V
		        Displays version, license and credits
		    -x
		        Disables TODOTXT_FINAL_FILTER


		  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
		    TODOTXT_FORCE=1                 is same as option -f
		    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_VERBOSE=1               is same as option -v
		    TODOTXT_DEFAULT_ACTION=""       run this when called with no arguments
		    TODOTXT_SORT_COMMAND="sort ..." customize list output
		    TODOTXT_FINAL_FILTER="sed ..."  customize list after color, P@+ hiding
	EndHelp

    if [ -d "$TODO_ACTIONS_DIR" ]
    then
        echo ""
        for action in "$TODO_ACTIONS_DIR"/*
        do
            if [ -f "$action" -a -x "$action" ]
            then
                "$action" usage
            fi
        done
        echo ""
    fi


    exit 1
}

die()
{
    echo "$*"
    exit 1
}

cleanup()
{
    [ -f "$TMP_FILE" ] && rm "$TMP_FILE"
    return 0
}

cleaninput()
{
    # Replace CR and LF with space; tasks always comprise a single line.
    input=${input//$'\r'/ }
    input=${input//$'\n'/ }

    if [ "$1" = "for sed" ]; then
        # This action uses sed with "|" as the substitution separator, and & as
        # the matched string; these must be escaped.
        # Backslashes must be escaped, too, and before the other stuff.
        input=${input//\\/\\\\}
        input=${input//|/\\|}
        input=${input//&/\\&}
    fi
}

archive()
{
    #defragment blank lines
    sed -i.bak -e '/./!d' "$TODO_FILE"
    [ $TODOTXT_VERBOSE -gt 0 ] && grep "^x " "$TODO_FILE"
    grep "^x " "$TODO_FILE" >> "$DONE_FILE"
    sed -i.bak '/^x /d' "$TODO_FILE"
    cp "$TODO_FILE" "$TMP_FILE"
    sed -n 'G; s/\n/&&/; /^\([ ~-]*\n\).*\n\1/d; s/\n//; h; P' "$TMP_FILE" > "$TODO_FILE"
    if [ $TODOTXT_VERBOSE -gt 0 ]; then
	echo "TODO: $TODO_FILE archived."
    fi
}

replaceOrPrepend()
{
  action=$1; shift
  case "$action" in
    replace)
      backref=
      querytext="Replacement: "
      ;;
    prepend)
      backref=' &'
      querytext="Prepend: "
      ;;
  esac
  shift; item=$1; shift

  [ -z "$item" ] && die "$errmsg"
  [[ "$item" = +([0-9]) ]] || die "$errmsg"

  todo=$(sed "$item!d" "$TODO_FILE")
  [ -z "$todo" ] && die "TODO: No task $item."

  if [[ -z "$1" && $TODOTXT_FORCE = 0 ]]; then
    echo -n "$querytext"
    read input
  else
    input=$*
  fi
  cleaninput "for sed"

  # Retrieve existing priority and prepended date
  priority=$(sed -e "$item!d" -e $item's/^\((.) \)\{0,1\}\([0-9]\{2,4\}-[0-9]\{2\}-[0-9]\{2\} \)\{0,1\}.*/\1/' "$TODO_FILE")
  prepdate=$(sed -e "$item!d" -e $item's/^\((.) \)\{0,1\}\([0-9]\{2,4\}-[0-9]\{2\}-[0-9]\{2\} \)\{0,1\}.*/\2/' "$TODO_FILE")

  if [ "$prepdate" -a "$action" = "replace" ] && [ "$(echo "$input"|sed -e 's/^\([0-9]\{2,4\}-[0-9]\{2\}-[0-9]\{2\}\)\{0,1\}.*/\1/')" ]; then
    # If the replaced text starts with a date, it will replace the existing
    # date, too.
    prepdate=
  fi

  # Temporarily remove any existing priority and prepended date, perform the
  # change (replace/prepend) and re-insert the existing priority and prepended
  # date again.
  sed -i.bak -e "$item s/^${priority}${prepdate}//" -e "$item s|^.*|${priority}${prepdate}${input}${backref}|" "$TODO_FILE"
  if [ $TODOTXT_VERBOSE -gt 0 ]; then
    newtodo=$(sed "$item!d" "$TODO_FILE")
    case "$action" in
      replace)
        echo "$item $todo"
        echo "TODO: Replaced task with:"
        echo "$item $newtodo"
        ;;
      prepend)
        echo "$item $newtodo"
        ;;
    esac
  fi
}

#Preserving environment variables so they don't get clobbered by the config file
OVR_TODOTXT_AUTO_ARCHIVE="$TODOTXT_AUTO_ARCHIVE"
OVR_TODOTXT_FORCE="$TODOTXT_FORCE"
OVR_TODOTXT_PRESERVE_LINE_NUMBERS="$TODOTXT_PRESERVE_LINE_NUMBERS"
OVR_TODOTXT_PLAIN="$TODOTXT_PLAIN"
OVR_TODOTXT_DATE_ON_ADD="$TODOTXT_DATE_ON_ADD"
OVR_TODOTXT_DISABLE_FILTER="$TODOTXT_DISABLE_FILTER"
OVR_TODOTXT_VERBOSE="$TODOTXT_VERBOSE"
OVR_TODOTXT_DEFAULT_ACTION="$TODOTXT_DEFAULT_ACTION"
OVR_TODOTXT_SORT_COMMAND="$TODOTXT_SORT_COMMAND"
OVR_TODOTXT_FINAL_FILTER="$TODOTXT_FINAL_FILTER"

# == PROCESS OPTIONS ==
while getopts ":fhpcnNaAtTvVx+@Pd:" Option
do
  case $Option in
    '@' )
        ## HIDE_CONTEXT_NAMES starts at zero (false); increment it to one
        ##   (true) the first time this flag is seen. Each time the flag
        ##   is seen after that, increment it again so that an even
        ##   number shows context names and an odd number hides context
        ##   names.
        : $(( HIDE_CONTEXT_NAMES++ ))
        if [ $(( $HIDE_CONTEXT_NAMES % 2 )) -eq 0 ]
        then
            ## Zero or even value -- show context names
            unset HIDE_CONTEXTS_SUBSTITUTION
        else
            ## One or odd value -- hide context names
            export HIDE_CONTEXTS_SUBSTITUTION='[[:space:]]@[[:graph:]]\{1,\}'
        fi
        ;;
    '+' )
        ## HIDE_PROJECT_NAMES starts at zero (false); increment it to one
        ##   (true) the first time this flag is seen. Each time the flag
        ##   is seen after that, increment it again so that an even
        ##   number shows project names and an odd number hides project
        ##   names.
        : $(( HIDE_PROJECT_NAMES++ ))
        if [ $(( $HIDE_PROJECT_NAMES % 2 )) -eq 0 ]
        then
            ## Zero or even value -- show project names
            unset HIDE_PROJECTS_SUBSTITUTION
        else
            ## One or odd value -- hide project names
            export HIDE_PROJECTS_SUBSTITUTION='[[:space:]][+][[:graph:]]\{1,\}'
        fi
        ;;
    a )
        OVR_TODOTXT_AUTO_ARCHIVE=0
        ;;
    A )
        OVR_TODOTXT_AUTO_ARCHIVE=1
        ;;
    c )
        OVR_TODOTXT_PLAIN=0
        ;;
    d )
        TODOTXT_CFG_FILE=$OPTARG
        ;;
    f )
        OVR_TODOTXT_FORCE=1
        ;;
    h )
        shorthelp
        ;;
    n )
        OVR_TODOTXT_PRESERVE_LINE_NUMBERS=0
        ;;
    N )
        OVR_TODOTXT_PRESERVE_LINE_NUMBERS=1
        ;;
    p )
        OVR_TODOTXT_PLAIN=1
        ;;
    P )
        ## HIDE_PRIORITY_LABELS starts at zero (false); increment it to one
        ##   (true) the first time this flag is seen. Each time the flag
        ##   is seen after that, increment it again so that an even
        ##   number shows priority labels and an odd number hides priority
        ##   labels.
        : $(( HIDE_PRIORITY_LABELS++ ))
        if [ $(( $HIDE_PRIORITY_LABELS % 2 )) -eq 0 ]
        then
            ## Zero or even value -- show priority labels
            unset HIDE_PRIORITY_SUBSTITUTION
        else
            ## One or odd value -- hide priority labels
            export HIDE_PRIORITY_SUBSTITUTION="([A-Z])[[:space:]]"
        fi
        ;;
    t )
        OVR_TODOTXT_DATE_ON_ADD=1
        ;;
    T )
        OVR_TODOTXT_DATE_ON_ADD=0
        ;;
    v )
        : $(( TODOTXT_VERBOSE++ ))
        ;;
    V )
        version
        ;;
    x )
        OVR_TODOTXT_DISABLE_FILTER=1
        ;;
  esac
done
shift $(($OPTIND - 1))

# defaults if not yet defined
TODOTXT_VERBOSE=${TODOTXT_VERBOSE:-1}
TODOTXT_PLAIN=${TODOTXT_PLAIN:-0}
TODOTXT_CFG_FILE=${TODOTXT_CFG_FILE:-$HOME/.todo/config}
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_DEFAULT_ACTION=${TODOTXT_DEFAULT_ACTION:-}
TODOTXT_SORT_COMMAND=${TODOTXT_SORT_COMMAND:-env LC_COLLATE=C sort -f -k2}
TODOTXT_FINAL_FILTER=${TODOTXT_FINAL_FILTER:-cat}

# Export all TODOTXT_* variables
export ${!TODOTXT_@}

# Default color map
export NONE=''
export BLACK='\\033[0;30m'
export RED='\\033[0;31m'
export GREEN='\\033[0;32m'
export BROWN='\\033[0;33m'
export BLUE='\\033[0;34m'
export PURPLE='\\033[0;35m'
export CYAN='\\033[0;36m'
export LIGHT_GREY='\\033[0;37m'
export DARK_GREY='\\033[1;30m'
export LIGHT_RED='\\033[1;31m'
export LIGHT_GREEN='\\033[1;32m'
export YELLOW='\\033[1;33m'
export LIGHT_BLUE='\\033[1;34m'
export LIGHT_PURPLE='\\033[1;35m'
export LIGHT_CYAN='\\033[1;36m'
export WHITE='\\033[1;37m'
export DEFAULT='\\033[0m'

# Default priority->color map.
export PRI_A=$YELLOW        # color for A priority
export PRI_B=$GREEN         # color for B priority
export PRI_C=$LIGHT_BLUE    # color for C priority
export PRI_X=$WHITE         # color unless explicitly defined

# Default highlight colors.
export COLOR_DONE=$LIGHT_GREY   # color for done (but not yet archived) tasks

# Default sentence delimiters for todo.sh append.
# If the text to be appended to the task begins with one of these characters, no
# whitespace is inserted in between. This makes appending to an enumeration
# (todo.sh add 42 ", foo") syntactically correct.
export SENTENCE_DELIMITERS=',.:;'

[ -e "$TODOTXT_CFG_FILE" ] || {
    CFG_FILE_ALT="$HOME/todo.cfg"

    if [ -e "$CFG_FILE_ALT" ]
    then
        TODOTXT_CFG_FILE="$CFG_FILE_ALT"
    fi
}

[ -e "$TODOTXT_CFG_FILE" ] || {
    CFG_FILE_ALT="$HOME/.todo.cfg"

    if [ -e "$CFG_FILE_ALT" ]
    then
        TODOTXT_CFG_FILE="$CFG_FILE_ALT"
    fi
}

[ -e "$TODOTXT_CFG_FILE" ] || {
    CFG_FILE_ALT=$(dirname "$0")"/todo.cfg"

    if [ -e "$CFG_FILE_ALT" ]
    then
        TODOTXT_CFG_FILE="$CFG_FILE_ALT"
    fi
}


if [ -z "$TODO_ACTIONS_DIR" -o ! -d "$TODO_ACTIONS_DIR" ]
then
    TODO_ACTIONS_DIR="$HOME/.todo/actions"
    export TODO_ACTIONS_DIR
fi

[ -d "$TODO_ACTIONS_DIR" ] || {
    TODO_ACTIONS_DIR_ALT="$HOME/.todo.actions.d"

    if [ -d "$TODO_ACTIONS_DIR_ALT" ]
    then
        TODO_ACTIONS_DIR="$TODO_ACTIONS_DIR_ALT"
    fi
}

# === SANITY CHECKS (thanks Karl!) ===
[ -r "$TODOTXT_CFG_FILE" ] || die "Fatal Error: Cannot read configuration file $TODOTXT_CFG_FILE"

. "$TODOTXT_CFG_FILE"

# === APPLY OVERRIDES
if [ -n "$OVR_TODOTXT_AUTO_ARCHIVE" ] ; then
  TODOTXT_AUTO_ARCHIVE="$OVR_TODOTXT_AUTO_ARCHIVE"
fi
if [ -n "$OVR_TODOTXT_FORCE" ] ; then
  TODOTXT_FORCE="$OVR_TODOTXT_FORCE"
fi
if [ -n "$OVR_TODOTXT_PRESERVE_LINE_NUMBERS" ] ; then
  TODOTXT_PRESERVE_LINE_NUMBERS="$OVR_TODOTXT_PRESERVE_LINE_NUMBERS"
fi
if [ -n "$OVR_TODOTXT_PLAIN" ] ; then
  TODOTXT_PLAIN="$OVR_TODOTXT_PLAIN"
fi
if [ -n "$OVR_TODOTXT_DATE_ON_ADD" ] ; then
  TODOTXT_DATE_ON_ADD="$OVR_TODOTXT_DATE_ON_ADD"
fi
if [ -n "$OVR_TODOTXT_DISABLE_FILTER" ] ; then
  TODOTXT_DISABLE_FILTER="$OVR_TODOTXT_DISABLE_FILTER"
fi
if [ -n "$OVR_TODOTXT_VERBOSE" ] ; then
  TODOTXT_VERBOSE="$OVR_TODOTXT_VERBOSE"
fi
if [ -n "$OVR_TODOTXT_DEFAULT_ACTION" ] ; then
  TODOTXT_DEFAULT_ACTION="$OVR_TODOTXT_DEFAULT_ACTION"
fi
if [ -n "$OVR_TODOTXT_SORT_COMMAND" ] ; then
  TODOTXT_SORT_COMMAND="$OVR_TODOTXT_SORT_COMMAND"
fi
if [ -n "$OVR_TODOTXT_FINAL_FILTER" ] ; then
  TODOTXT_FINAL_FILTER="$OVR_TODOTXT_FINAL_FILTER"
fi

ACTION=${1:-$TODOTXT_DEFAULT_ACTION}

[ -z "$ACTION" ]    && usage
[ -d "$TODO_DIR" ]  || die "Fatal Error: $TODO_DIR is not a directory"
( cd "$TODO_DIR" )  || die "Fatal Error: Unable to cd to $TODO_DIR"

[ -w "$TMP_FILE"  ] || echo -n > "$TMP_FILE" || die "Fatal Error: Unable to write to $TMP_FILE"
[ -f "$TODO_FILE" ] || cp /dev/null "$TODO_FILE"
[ -f "$DONE_FILE" ] || cp /dev/null "$DONE_FILE"
[ -f "$REPORT_FILE" ] || cp /dev/null "$REPORT_FILE"

if [ $TODOTXT_PLAIN = 1 ]; then
    for clr in ${!PRI_@}; do
        export $clr=$NONE
    done
    PRI_X=$NONE
    DEFAULT=$NONE
    COLOR_DONE=$NONE
fi

_addto() {
    file="$1"
    input="$2"
    cleaninput

    if [[ $TODOTXT_DATE_ON_ADD = 1 ]]; then
        now=$(date '+%Y-%m-%d')
        input=$(echo "$input" | sed -e 's/^\(([A-Z]) \)\{0,1\}/\1'"$now /")
    fi
    echo "$input" >> "$file"
    if [ $TODOTXT_VERBOSE -gt 0 ]; then
        TASKNUM=$(sed -n '$ =' "$file")
        BASE=$(basename "$file")
        PREFIX=$(echo ${BASE%%.[^.]*} | tr 'a-z' 'A-Z')
        echo "$TASKNUM $input"
        echo "${PREFIX}: $TASKNUM added."
    fi
}

_list() {
    local FILE="$1"
    ## If the file starts with a "/" use absolute path. Otherwise,
    ## try to find it in either $TODO_DIR or using a relative path
    if [ "${1:0:1}" == / ]; then
        ## Absolute path
        src="$FILE"
    elif [ -f "$TODO_DIR/$FILE" ]; then
        ## Path relative to todo.sh directory
        src="$TODO_DIR/$FILE"
    elif [ -f "$FILE" ]; then
        ## Path relative to current working directory
        src="$FILE"
    elif [ -f "$TODO_DIR/${FILE}.txt" ]; then
        ## Path relative to todo.sh directory, missing file extension
        src="$TODO_DIR/${FILE}.txt"
    else
        die "TODO: File $FILE does not exist."
    fi

    ## Get our search arguments, if any
    shift ## was file name, new $1 is first search term

    ## Prefix the filter_command with the pre_filter_command
    filter_command="${pre_filter_command:-}"

    for search_term
    do
        ## See if the first character of $search_term is a dash
        if [ "${search_term:0:1}" != '-' ]
        then
            ## First character isn't a dash: hide lines that don't match
            ## this $search_term
            filter_command="${filter_command:-} ${filter_command:+|} \
                grep -i \"$search_term\" "
        else
            ## First character is a dash: hide lines that match this
            ## $search_term
            #
            ## Remove the first character (-) before adding to our filter command
            filter_command="${filter_command:-} ${filter_command:+|} \
                grep -v -i \"${search_term:1}\" "
        fi
    done

    ## If post_filter_command is set, append it to the filter_command
    [ -n "$post_filter_command" ] && {
        filter_command="${filter_command:-}${filter_command:+ | }${post_filter_command:-}"
    }

    ## Figure out how much padding we need to use
    ## We need one level of padding for each power of 10 $LINES uses
    LINES=$( sed -n '$ =' "$src" )
    PADDING=${#LINES}

    ## Number the file, then run the filter command,
    ## then sort and mangle output some more
    if [[ $TODOTXT_DISABLE_FILTER = 1 ]]; then
        TODOTXT_FINAL_FILTER="cat"
    fi
    items=$(
        sed = "$src"                                            \
        | sed "N; s/^/     /; s/ *\(.\{$PADDING,\}\)\n/\1 /"    \
        | grep -v "^[ 0-9]\+ *$"
    )
    if [ "${filter_command}" ]; then
        filtered_items=$(echo -n "$items" | eval ${filter_command})
    else
        filtered_items=$items
    fi
    filtered_items=$(
        echo -n "$filtered_items"                              \
        | sed '''
            s/^     /00000/;
            s/^    /0000/;
            s/^   /000/;
            s/^  /00/;
            s/^ /0/;
          ''' \
        | eval ${TODOTXT_SORT_COMMAND}                                        \
        | awk '''
            function highlight(colorVar,      color) {
                color = ENVIRON[colorVar]
                gsub(/\\+033/, "\033", color)
                return color
            }
            {
                pos = match($0, /\([A-Z]\)/)
                if (match($0, /^[0-9]+ x /)) {
                    print highlight("COLOR_DONE") $0 highlight("DEFAULT")
                } else if (pos > 0) {
                    clr = highlight("PRI_" substr($0, pos+1, 1))
                    print ( clr ? clr : highlight("PRI_X") ) $0 highlight("DEFAULT")
                } else { print }
            }
          '''  \
        | sed '''
            s/'${HIDE_PRIORITY_SUBSTITUTION:-^}'//g
            s/'${HIDE_PROJECTS_SUBSTITUTION:-^}'//g
            s/'${HIDE_CONTEXTS_SUBSTITUTION:-^}'//g
          '''                                                   \
        | eval ${TODOTXT_FINAL_FILTER}                          \
    )
    [ "$filtered_items" ] && echo "$filtered_items"

    if [ $TODOTXT_VERBOSE -gt 0 ]; then
        BASE=$(basename "$FILE")
        PREFIX=$(echo ${BASE%%.[^.]*} | tr 'a-z' 'A-Z')
        NUMTASKS=$( echo -n "$filtered_items" | sed -n '$ =' )
        TOTALTASKS=$( echo -n "$items" | sed -n '$ =' )

        echo "--"
        echo "${PREFIX}: ${NUMTASKS:-0} of ${TOTALTASKS:-0} tasks shown"
    fi
    if [ $TODOTXT_VERBOSE -gt 1 ]; then
        echo "TODO DEBUG: Filter Command was: ${filter_command:-cat}"
    fi
}

export -f cleaninput _list die

# == HANDLE ACTION ==
action=$( printf "%s\n" "$ACTION" | tr 'A-Z' 'a-z' )

## If the first argument is "command", run the rest of the arguments
## using todo.sh builtins.
## Else, run a actions script with the name of the command if it exists
## or fallback to using a builtin
if [ "$action" == command ]
then
    ## Get rid of "command" from arguments list
    shift
    ## Reset action to new first argument
    action=$( printf "%s\n" "$1" | tr 'A-Z' 'a-z' )
elif [ -d "$TODO_ACTIONS_DIR" -a -x "$TODO_ACTIONS_DIR/$action" ]
then
    "$TODO_ACTIONS_DIR/$action" "$@"
    status=$?
    cleanup
    exit $status
fi

## Only run if $action isn't found in .todo.actions.d
case $action in
"add" | "a")
    if [[ -z "$2" && $TODOTXT_FORCE = 0 ]]; then
        echo -n "Add: "
        read input
    else
        [ -z "$2" ] && die "usage: $TODO_SH add \"TODO ITEM\""
        shift
        input=$*
    fi
    _addto "$TODO_FILE" "$input"
    ;;

"addm")
    if [[ -z "$2" && $TODOTXT_FORCE = 0 ]]; then
        echo -n "Add: "
        read input
    else
        [ -z "$2" ] && die "usage: $TODO_SH addm \"TODO ITEM\""
        shift
        input=$*
    fi

    # Set Internal Field Seperator as newline so we can 
    # loop across multiple lines
    SAVEIFS=$IFS
    IFS=$'\n'

    # Treat each line seperately
    for line in $input ; do
        _addto "$TODO_FILE" "$line"
    done
    IFS=$SAVEIFS
    ;;

"addto" )
    [ -z "$2" ] && die "usage: $TODO_SH addto DEST \"TODO ITEM\""
    dest="$TODO_DIR/$2"
    [ -z "$3" ] && die "usage: $TODO_SH addto DEST \"TODO ITEM\""
    shift
    shift
    input=$*

    if [ -f "$dest" ]; then
        _addto "$dest" "$input"
    else
        die "TODO: Destination file $dest does not exist."
    fi
    ;;

"append" | "app" )
    errmsg="usage: $TODO_SH append ITEM# \"TEXT TO APPEND\""
    shift; item=$1; shift

    [ -z "$item" ] && die "$errmsg"
    [[ "$item" = +([0-9]) ]] || die "$errmsg"
    todo=$(sed "$item!d" "$TODO_FILE")
    [ -z "$todo" ] && die "TODO: No task $item."
    if [[ -z "$1" && $TODOTXT_FORCE = 0 ]]; then
        echo -n "Append: "
        read input
    else
        input=$*
    fi
    case "$input" in
      [$SENTENCE_DELIMITERS]*)  appendspace=;;
      *)                        appendspace=" ";;
    esac
    cleaninput "for sed"

    if sed -i.bak $item" s|^.*|&${appendspace}${input}|" "$TODO_FILE"; then
        if [ $TODOTXT_VERBOSE -gt 0 ]; then
            newtodo=$(sed "$item!d" "$TODO_FILE")
            echo "$item $newtodo"
	fi
    else
        die "TODO: Error appending task $item."
    fi
    ;;

"archive" )
    archive;;

"del" | "rm" )
    # replace deleted line with a blank line when TODOTXT_PRESERVE_LINE_NUMBERS is 1
    errmsg="usage: $TODO_SH del ITEM# [TERM]"
    item=$2
    [ -z "$item" ] && die "$errmsg"
    [[ "$item" = +([0-9]) ]] || die "$errmsg"
    DELETEME=$(sed "$item!d" "$TODO_FILE")
    [ -z "$DELETEME" ] && die "TODO: No task $item."

    if [ -z "$3" ]; then
        if  [ $TODOTXT_FORCE = 0 ]; then
            echo "Delete '$DELETEME'?  (y/n)"
            read ANSWER
        else
            ANSWER="y"
        fi
        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"
            else
                # leave blank line behind (preserves line numbers)
                sed -i.bak -e $item"s/^.*//" "$TODO_FILE"
            fi
            if [ $TODOTXT_VERBOSE -gt 0 ]; then
                echo "$item $DELETEME"
                echo "TODO: $item deleted."
            fi
        else
            echo "TODO: No tasks were deleted."
        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/$3//g" \
            "$TODO_FILE"
        newtodo=$(sed "$item!d" "$TODO_FILE")
        if [ "$DELETEME" = "$newtodo" ]; then
            [ $TODOTXT_VERBOSE -gt 0 ] && echo "$item $DELETEME"
            die "TODO: '$3' not found; no removal done."
        fi
        if [ $TODOTXT_VERBOSE -gt 0 ]; then
            echo "$item $DELETEME"
            echo "TODO: Removed '$3' from task."
            echo "$item $newtodo"
        fi
    fi
    ;;

"depri" | "dp" )
    errmsg="usage: $TODO_SH depri ITEM#[, ITEM#, ITEM#, ...]"
    shift;
    [ $# -eq 0 ] && die "$errmsg"

    # Split multiple depri's, if comma separated change to whitespace separated
    # Loop the 'depri' function for each item
    for item in $(echo $* | tr ',' ' '); do
	[[ "$item" = +([0-9]) ]] || die "$errmsg"
	todo=$(sed "$item!d" "$TODO_FILE")
	[ -z "$todo" ] && die "TODO: No task $item."

	if [[ "$todo" = \(?\)\ * ]]; then
	    sed -i.bak -e $item"s/^(.) //" "$TODO_FILE"
	    if [ $TODOTXT_VERBOSE -gt 0 ]; then
		NEWTODO=$(sed "$item!d" "$TODO_FILE")
		echo "$item $NEWTODO"
		echo "TODO: $item deprioritized."
	    fi
	else
	    echo "TODO: $item is not prioritized."
	fi
    done
    ;;

"do" )
    errmsg="usage: $TODO_SH do ITEM#[, ITEM#, ITEM#, ...]"
    # shift so we get arguments to the do request
    shift;
    [ "$#" -eq 0 ] && die "$errmsg"

    # Split multiple do's, if comma separated change to whitespace separated
    # Loop the 'do' function for each item
    for item in $(echo $* | tr ',' ' '); do
        [ -z "$item" ] && die "$errmsg"
        [[ "$item" = +([0-9]) ]] || die "$errmsg"

        todo=$(sed "$item!d" "$TODO_FILE")
        [ -z "$todo" ] && die "TODO: No task $item."

        # Check if this item has already been done
        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 [ $TODOTXT_VERBOSE -gt 0 ]; then
                newtodo=$(sed "$item!d" "$TODO_FILE")
                echo "$item $newtodo"
                echo "TODO: $item marked as done."
	    fi
        else
            echo "TODO: $item is already marked done."
        fi
    done

    if [ $TODOTXT_AUTO_ARCHIVE = 1 ]; then
        archive
    fi
    ;;

"help" )
    if [ -t 1 ] ; then # STDOUT is a TTY
        if which "${PAGER:-less}" >/dev/null 2>&1; then
            # we have a working PAGER (or less as a default)
            help | "${PAGER:-less}" && exit 0
        fi
    fi
    help # just in case something failed above, we go ahead and just spew to STDOUT
    ;;

"list" | "ls" )
    shift  ## Was ls; new $1 is first search term
    _list "$TODO_FILE" "$@"
    ;;

"listall" | "lsa" )
    shift  ## Was lsa; new $1 is first search term

    cat "$TODO_FILE" "$DONE_FILE" > "$TMP_FILE"
    _list "$TMP_FILE" "$@"
    ;;

"listfile" | "lf" )
    shift  ## Was listfile, next $1 is file name
    FILE="$1"
    shift  ## Was filename; next $1 is first search term

    _list "$FILE" "$@"
    ;;

"listcon" | "lsc" )
    grep -o '[^ ]*@[^ ]\+' "$TODO_FILE" | grep '^@' | sort -u
    ;;

"listproj" | "lsprj" )
    grep -o '[^ ]*+[^ ]\+' "$TODO_FILE" | grep '^+' | sort -u
    ;;

"listpri" | "lsp" )
    shift ## was "listpri", new $1 is priority to list or first TERM

    pri=$(printf "%s\n" "$1" | tr 'a-z' 'A-Z' | grep '^[A-Z]$') && shift || pri="[A-Z]"
    post_filter_command="grep '^ *[0-9]\+ (${pri}) '"
    _list "$TODO_FILE" "$@"
    ;;

"move" | "mv" )
    # replace moved line with a blank line when TODOTXT_PRESERVE_LINE_NUMBERS is 1
    errmsg="usage: $TODO_SH mv ITEM# DEST [SRC]"
    item=$2
    dest="$TODO_DIR/$3"
    src="$TODO_DIR/$4"

    [ -z "$item" ] && die "$errmsg"
    [ -z "$4" ] && src="$TODO_FILE"
    [ -z "$dest" ] && die "$errmsg"

    [[ "$item" = +([0-9]) ]] || die "$errmsg"

    [ -f "$src" ] || die "TODO: Source file $src does not exist."
    [ -f "$dest" ] || die "TODO: Destination file $dest does not exist."

    MOVEME=$(sed "$item!d" "$src")
    [ -z "$MOVEME" ] && die "$item: No such item in $src."
    if  [ $TODOTXT_FORCE = 0 ]; then
        echo "Move '$MOVEME' from $src to $dest? (y/n)"
        read ANSWER
    else
        ANSWER="y"
    fi
    if [ "$ANSWER" = "y" ]; then
        if [ $TODOTXT_PRESERVE_LINE_NUMBERS = 0 ]; then
            # delete line (changes line numbers)
            sed -i.bak -e $item"s/^.*//" -e '/./!d' "$src"
        else
            # leave blank line behind (preserves line numbers)
            sed -i.bak -e $item"s/^.*//" "$src"
        fi
        echo "$MOVEME" >> "$dest"

        if [ $TODOTXT_VERBOSE -gt 0 ]; then
            echo "$item $MOVEME"
            echo "TODO: $item moved from '$src' to '$dest'."
        fi
    else
        echo "TODO: No tasks moved."
    fi
    ;;

"prepend" | "prep" )
    errmsg="usage: $TODO_SH prepend ITEM# \"TEXT TO PREPEND\""
    replaceOrPrepend 'prepend' "$@"
    ;;

"pri" | "p" )
    item=$2
    newpri=$( printf "%s\n" "$3" | tr 'a-z' 'A-Z' )

    errmsg="usage: $TODO_SH pri ITEM# PRIORITY
note: PRIORITY must be anywhere from A to Z."

    [ "$#" -ne 3 ] && die "$errmsg"
    [[ "$item" = +([0-9]) ]] || die "$errmsg"
    [[ "$newpri" = @([A-Z]) ]] || die "$errmsg"

    oldpri=$(sed -ne $item's/^(\(.\)) .*/\1/p' "$TODO_FILE")
    if [ "$oldpri" != "$newpri" ]; then
        sed -i.bak -e $item"s/^(.) //" -e $item"s/^/($newpri) /" "$TODO_FILE"
    fi
    if [ $TODOTXT_VERBOSE -gt 0 ]; then
        NEWTODO=$(sed "$item!d" "$TODO_FILE")
        echo "$item $NEWTODO"
        if [ "$oldpri" != "$newpri" ]; then
            if [ "$oldpri" ]; then
                echo "TODO: $item re-prioritized from ($oldpri) to ($newpri)."
            else
                echo "TODO: $item prioritized ($newpri)."
            fi
        fi
    fi
    if [ "$oldpri" = "$newpri" ]; then
        echo "TODO: $item already prioritized ($newpri)."
    fi
    ;;

"replace" )
    errmsg="usage: $TODO_SH replace ITEM# \"UPDATED ITEM\""
    replaceOrPrepend 'replace' "$@"
    ;;

"report" )
    #archive first
    sed '/^x /!d' "$TODO_FILE" >> "$DONE_FILE"
    sed -i.bak '/^x /d' "$TODO_FILE"

    NUMLINES=$( sed -n '$ =' "$TODO_FILE" )
    if [ ${NUMLINES:-0} = "0" ]; then
         echo "datetime todos dones" >> "$REPORT_FILE"
    fi
    #now report
    TOTAL=$( sed -n '$ =' "$TODO_FILE" )
    TDONE=$( sed -n '$ =' "$DONE_FILE" )
    TECHO=$(echo $(date +%Y-%m-%d-%T); echo ' '; echo ${TOTAL:-0}; echo ' ';
    echo ${TDONE:-0})
    echo $TECHO >> "$REPORT_FILE"
    [ $TODOTXT_VERBOSE -gt 0 ] && echo "TODO: Report file updated."
    cat "$REPORT_FILE"
    ;;

* )
    usage;;
esac

cleanup