117 lines
2.9 KiB
Bash
117 lines
2.9 KiB
Bash
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#!/usr/bin/env bash
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set -eEuo pipefail
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SCRIPT_PATH="${BASH_SOURCE[0]}"
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SCRIPT_DIR="$(dirname "$SCRIPT_PATH")"
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#######################################
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# Print the given message to STDERR
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#######################################
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err() {
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printf "%s\n" "${*}" >&2
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}
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#######################################
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# End the script with a non-zero exit code and the given message
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# Arguments:
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# msg: The message to print to STDERR before exiting
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#######################################
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die() {
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local msg="${*}"
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err "$msg"
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exit 1
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}
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#######################################
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# Print a usage synopsis for the script to stdout
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#######################################
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usage() {
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cat <<-__EOS__
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Usage:
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${SCRIPT_PATH} <input-files...>
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Args:
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<input-files...>: One or more paths to files on the system
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Example:
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${SCRIPT_PATH} ./some/file/to/handle.txt ./another/file/to/handle.txt
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__EOS__
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}
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#######################################
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# Replace all instances of <dstamp> or <date> with todays date in day/month/year
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# format in place for the given file
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# Arguments:
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# file: The file to template in the date for
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#######################################
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replace_date_placeholders_in_file() {
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local file="${1}"
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local current_date
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current_date="$(date +"%d\/%m\/%Y")"
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sed -ri "s/(<dstamp>|<date>)/$current_date/g" "$file"
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}
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#######################################
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# Redact the given file with the included sed script in place for the given file
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# Arguments:
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# file: The file to redact
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#######################################
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redact_file() {
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local file="${1}"
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sed -ri -f "${SCRIPT_DIR}/assign2.sed" "$file"
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}
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#######################################
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# Check that the given file can be used within the script. For example, check
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# that the current script/user has read & write permissions for the given file.
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# Arguments:
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# file: The file to check
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#######################################
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check_file() {
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local file="${1}"
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if ! [[ -r "$file" ]]; then
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err "Unable to read '${file}', the current user lacks read permissions or the file does not exist!"
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return 1
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fi
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if ! [[ -w "$file" ]]; then
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err "Unable to modify '${file}', the current user lacks write permissions!"
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return 1
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fi
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}
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#######################################
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# Check all given files and return a single error code if any given check fails.
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# This is done so all errors for the given files are output to the user prior to
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# exiting.
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# Arguments:
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# files: an array of files to loop through and validate
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#######################################
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validate_files() {
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local ret_code=0
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local files=("${@}")
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for file in "${files[@]}"; do
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if ! check_file "$file"; then
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ret_code=1
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fi
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done
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return "$ret_code"
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}
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main() {
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local files=("${@}")
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if (("${#files[@]}" == 0)); then
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usage
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die "No arguments provided!"
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fi
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validate_files "${files[@]}" || die "File checks failed, refusing to run script!"
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for file in "${files[@]}"; do
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redact_file "$file"
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replace_date_placeholders_in_file "$file"
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done
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}
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main "${@}"
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