simplify and rename to teeu

[tee-unique] / appendu

diff --git a/appendu b/appendu
deleted file mode 100755 (executable)
index 460e363..0000000
--- a/appendu
+++ /dev/null
@@ -1,106 +0,0 @@
-#!/bin/bash
-# Copyright (C) 2014 Ian Kelling
-# This program is under GPL v. 3 or later, see <http://www.gnu.org/licenses/>
-
-appendu() {
-    local help="Usage: appendu [OPTION]... FILE [LINE_SET]...
-
-Append unique.
-
-A LINE_SET is one or more lines. Append LINE_SET to FILE if it does not exist in
-FILE.  If no LINE_SET argument is given, read lines from stdin, and treat each
-as a single LINE_SET. Appended text is output to the terminal. Duplicate
-LINE_SETs are treated the same.
-
-  --           stop processing arguments
-  [-h|--help]  display this message"
-
-    
-    while true; do
-        if [[ $1 == --help || $1 == -h ]]; then
-            echo "$help"
-            return
-        elif [[ $1 == -- ]]; then
-            shift
-            break
-        else
-            break
-        fi
-    done
-    
-    if [[ ${#@} == 0 ]]; then
-        echo "error: need 1 or more arguments"
-        echo "$help"
-        return 1
-    fi
-
-    local file="$1"
-    shift
-
-    local new_file=true
-    if [[ -e $file ]]; then
-        new_file=false
-    else
-        local dir="$(dirname "$file")"
-        if [[ ! -d $dir ]]; then
-            echo "appendu error: $dir does not exist"
-            return 1
-        fi
-    fi
-
-    local strings line
-    if (( $# == 0 )); then
-        unset IFS
-        while read -r line; do
-            strings+=( "$line" )
-        done
-    else
-        strings=( "$@" )
-    fi
-
-    if ! $new_file; then
-        if [[ ! -r $file ]]; then
-            echo "appendu error: cannot read or write $file"
-            return 1
-        fi
-        if [[ ! -w $file ]]; then
-            echo "appendu error: cannot read or write $file"
-            return 1
-        fi            
-        # fix files with no newline at the end.
-        # the following command won't work right on them otherwise.
-        # e = run script, $a\ means append following text, but there is none,
-        # so sed only does what it always does when it was supposed to modify a file,
-        # which is append a newline if there was none.
-        sed -i '$a\' "$file"
-        # command substitution removes any trailing newlines, so we have to add
-        # a non-newline ending, we randomly chose "b", then remove it.
-        local content=$(cat "$file"; echo b)
-        content=${content%b}
-    fi
-    
-    local reset_extglob=false
-    ! shopt extglob >/dev/null && reset_extglob=true
-    shopt -s extglob
-    # we aren't using regex because we want to match strings,
-    # but we also want our match to start at the beginning of a line,
-    # or the beginning of the file, and to end at a line ending.
-    # So we do some slick bash to match this.
-    local start="?(*
-)"
-    local end="
-*"
-    local return_code string return_code
-    for string in "${strings[@]}"; do
-        if $new_file || [[ $content != $start"$string"$end ]]; then
-            if ! tee -a "$file"<<<"$string"; then
-                return_code=$?
-                echo "appendu error: error writing to $file"
-                return $return_code
-            fi
-        fi
-    done
-    $reset_extglob && shopt -u extglob 
-    return 0
-}
-appendu "$@"