--- /dev/null
+#!/bin/bash
+# Desc: Processes script arguments
+
+#==BEGIN Define script parameters==
+#===BEGIN Define variables===
+:
+#===END Define variables===
+
+#===BEGIN Declare local script functions===
+yell() { echo "$0: $*" >&2; } #o Yell, Die, Try Three-Fingered Claw technique
+die() { yell "$*"; exit 111; } #o Ref/Attrib: https://stackoverflow.com/a/25515370
+try() { "$@" || die "cannot $*"; } #o
+vbm() {
+ # Description: Prints verbose message ("vbm") to stderr if opVerbose is set to "true".
+ # Usage: vbm "DEBUG :verbose message here"
+ # Version 0.2.0
+ # Input: arg1: string
+ # vars: opVerbose
+ # Output: stderr
+ # Depends: bash 5.0.3, GNU-coreutils 8.30 (echo, date)
+
+ if [ "$opVerbose" = "true" ]; then
+ functionTime="$(date --iso-8601=ns)"; # Save current time in nano seconds.
+ echo "[$functionTime]:$0:""$*" 1>&2; # Display argument text.
+ fi
+
+ # End function
+ return 0; # Function finished.
+} # Displays message if opVerbose true
+showUsage() {
+ # Desc: Display script usage information
+ # Usage: showUsage
+ # Version 0.0.1
+ # Input: none
+ # Output: stdout
+ # Depends: GNU-coreutils 8.30 (cat)
+ cat <<'EOF'
+ USAGE:
+ bktemp-processArgs [ options ] [FILE...]
+
+ OPTIONS:
+ -h, --help
+ Display help information.
+ --version
+ Display script version.
+ -v, --verbose
+ Display debugging info.
+ -i, --input-file
+ Define input file path.
+ -I, --input-dir
+ Define input directory path.
+ -o, --output-file
+ Define output file path
+ -O, --output-dir
+ Define output directory path
+
+ EXAMPLE:
+ bktemp-processArgs -o foo.txt
+EOF
+} # Display information on how to use this script.
+showVersion() {
+ # Desc: Displays script version and license information.
+ # Usage: showVersion
+ # Version: 0.0.1
+ # Input: scriptVersion var containing version string
+ # Output: stdout
+ # Depends: vbm(), yell, GNU-coreutils 8.30
+
+ # Initialize function
+ vbm "DEBUG:showVersion function called."
+
+ cat <<'EOF'
+bktemp-processArgs 0.0.1
+Copyright (C) 2021 Steven Baltakatei Sandoval
+License GPLv3: GNU GPL version 3
+This is free software; you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
+
+ GNU Coreutils 8.30
+ Copyright (C) 2018 Free Software Foundation, Inc.
+ License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
+ This is free software: you are free to change and redistribute it.
+ There is NO WARRANTY, to the extent permitted by law.
+EOF
+
+ # End function
+ vbm "DEBUG:showVersion function ended."
+ return 0; # Function finished.
+} # Display script version.
+processArgs() {
+ # Desc: Processes arguments provided to script.
+ # Usage: processArgs "$@"
+ # Version: 0.0.1
+ # Input: "$@" (list of arguments provided to the function)
+ # Output: Sets following variables used by other functions:
+ # opVerbose Indicates verbose mode enable status. (ex: "true", "false")
+ # pathDirOut1 Path to output directory.
+ # pathFileOut1 Path to output file.
+ # pathDirIn1 Path to input directory.
+ # pathFileIn1 Path to input file.
+ # opFileOut1_overwrite Indicates whether file pathFileOut1 should be overwritten (ex: "true", "false')
+ # Depends:
+ # yell() Displays messages to stderr.
+ # vbm() Displays messsages to stderr if opVerbose set to "true".
+ # showUsage() Displays usage information about parent script
+ # showVersion() Displays version about parent script
+ # External dependencies: bash (5.0.3), echo
+ # Ref./Attrib.:
+ # [1]: Marco Aurelio (2014-05-08). "echo that outputs to stderr". https://stackoverflow.com/a/23550347
+
+ # Initialize function
+ vbm "DEBUG:processArgs function called."
+
+ # Perform work
+ while [ ! $# -eq 0 ]; do # While number of arguments ($#) is not (!) equal to (-eq) zero (0).
+ #yell "DEBUG:Starting processArgs while loop." # Debug stderr message. See [1].
+ #yell "DEBUG:Provided arguments are:""$*" # Debug stderr message. See [1].
+ case "$1" in
+ -h | --help) showUsage; exit 1;; # Display usage.
+ --version) showVersion; exit 1;; # Show version
+ -v | --verbose) opVerbose="true"; vbm "DEBUG:Verbose mode enabled.";; # Enable verbose mode. See [1].
+ -i | --input-file) # Define input file path
+ if [ -f "$2" ]; then # If $2 is file that exists, set pathFileIn1 to $2, pop $2.
+ pathFileIn1="$2";
+ shift;
+ vbm "DEBUG:Input file pathFileIn1 set to:""$2";
+ else
+ yell "ERROR: Specified input file does not exist:""$2";
+ yell "Exiting.";
+ exit 1;
+ fi ;;
+ -I | --input-dir) # Define input directory path
+ if [ -d "$2" ]; then # If $2 is dir that exists, set pathDirIn1 to $2, pop $2.
+ pathDirIn1="$2";
+ shift;
+ vbm "DEBUG:Input directory pathDirIn1 set to:""$2";
+ else # Display error if $2 is not a valid dir.
+ yell "ERROR:Specified input directory does not exist:""$2";
+ yell "Exiting.";
+ exit 1;
+ fi ;;
+ -o | --output-file) # Define output file path
+ if [ -f "$2" ]; then # If $2 is file that exists, prompt user to continue to overwrite, set pathFileOut1 to $2, pop $2.
+ yell "Specified output file $2 already exists. Overwrite? (y/n):"
+ read -r m; case $m in
+ y | Y | yes) opFileOut1_overwrite="true";;
+ n | N | no) opFileOut1_overwrite="false";;
+ *) yell "Invalid selection. Exiting."; exit 1;;
+ esac
+ if [ "$opFileOut1_overwrite" == "true" ]; then
+ pathFileOut1="$2";
+ shift;
+ vbm "DEBUG:Output file pathFileOut1 set to:""$2";
+ else
+ yell "ERORR:Exiting in order to not overwrite output file:""$pathFileOut1";
+ exit 1;
+ fi
+ else
+ pathFileOut1="$2";
+ shift;
+ vbm "DEBUG:Output file pathFileOut1 set to:""$2";
+ fi ;;
+ -O | --output-dir) # Define output directory path
+ if [ -d "$2" ]; then # If $2 is dir that exists, set pathDirOut1 to $2, pop $2
+ pathDirOut1="$2";
+ shift;
+ vbm "DEBUG:Output directory pathDirOut1 set to:""$2";
+ else
+ yell "ERROR:Specified output directory is not valid:""$2";
+ yell "Exiting.";
+ exit 1;
+ fi ;;
+ *) yell "ERROR: Unrecognized argument."; exit 1;; # Handle unrecognized options. See [1].
+ esac
+ shift
+ done
+
+ # End function
+ vbm "DEBUG:processArgs function ended."
+ return 0; # Function finished.
+} # Evaluate script options from positional arguments (ex: $1, $2, $3, etc.).
+
+#===END Declare local script functions===
+#==END Define script parameters==
+
+#==BEGIN sample code==
+processArgs "$@";
+yell "DEBUG:Provided arguments..:""$*"
+yell "DEBUG:opVerbose...........:$opVerbose";
+yell "DEBUG:pathDirOut1.........:$pathDirOut1";
+yell "DEBUG:pathFileOut1........:$pathFileOut1";
+yell "DEBUG:pathDirIn1..........:$pathDirIn1";
+yell "DEBUG:pathFileIn1.........:$pathFileIn1";
+yell "DEBUG:opFileOut1_overwrite:$opFileOut1_overwrite";
+#==END sample code==
+
+# Author: Steven Baltaktei Sandoval
+# License: GPLv3+
projects / BK-2020-03.git / commitdiff