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
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
- -s don't try to use sudo when it would help us read or write the file
- -- stop processing arguments
- --help display this message"
+ -- stop processing arguments
+ [-h|--help] display this message"
- if $file_exists; then
- # fix files with no newline at the end.
- # the following command won't work right on them.
- # e = run script, $a\ means append following text, but there is none,
- # so sed only does what it always does when it was supposed to modify a file,
- # which is append a newline if there was none.
- sed -ie '$a\' "$file"
- # command substitution removes any trailing newlines, so we have to add
- # a non-newline ending, we randomly chose "b", then remove it.
- content=$($readsudo cat "$file"; echo b) content=${content%b}
-
- # 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="?(*
+ # fix files with no newline at the end.
+ # the following command won't work right on them otherwise.
+ # e = run script, $a\ means append following text, but there is none,
+ # so sed only does what it always does when it was supposed to modify a file,
+ # which is append a newline if there was none.
+ sed -ie '$a\' "$file"
+ # command substitution removes any trailing newlines, so we have to add
+ # a non-newline ending, we randomly chose "b", then remove it.
+ content=$(cat "$file"; echo b) content=${content%b}
+
+ # 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="?(*
- for string in "${strings[@]}"; do
- [[ $content != $start"$string"$end ]] && $writesudo tee -a "$file"<<<"$string"
- done
- else
- for string in "${strings[@]}"; do
- $writesudo tee -a "$file"<<<"${strings[@]}"
- done
- fi
+ local return_code
+ for string in "${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