Refactor column output

- Use single function _columns_ - Use single variable for indentation - add options for bold, underline, reverse for left column
2025-11-08 05:03:46 -05:00 · 2022-04-28 23:30:10 -04:00
parent 8719caa6bd
commit b655220616
4 changed files with 99 additions and 134 deletions
--- a/README.md
+++ b/README.md
@@ -125,12 +125,11 @@ You can copy any complete function from the Utilities and place it into your scr

 ## alerts.bash

- **`_columnizeOutput_`** Creates a column output for key/value pairs with line wrapping for the right column (value)
+- **`_columns_`** Prints a two column output from a key/value pair
 - -**`_printFuncStack_`** Prints the function stack in use. Used for debugging, and error reporting
 - **`_alert_`** Performs alerting functions including writing to a log file and printing to screen
 - **`_centerOutput_`** Prints text in the center of the terminal window
 - **`_setColors_`** Sets color constants for alerting (**Note:** Colors default to a dark theme.)
- **`_usageCommands_`** Used to add commands to the `_usage_` function. Prints commands and their descriptions in two aligned columns. Uses an option 4 character tab count to indent the commands.

 Basic alerting, logging, and setting color functions (included in `scriptTemplate.sh` by default). Print messages to stdout and to a user specified logfile using the following functions.

--- a/template.sh
+++ b/template.sh
@@ -296,28 +296,13 @@ _usage_() {
  This is a script template.  Edit this description to print help to users.

  ${bold}${underline}Options:${reset}
-$(_usageCommands_ \
-        "-h, --help" \
-        "Display this help and exit")
-$(_usageCommands_ \
-            "--loglevel [LEVEL]" \
-            "One of: FATAL, ERROR (default), WARN, INFO, NOTICE, DEBUG, ALL, OFF")
-$(_usageCommands_ \
-            "--logfile [FILE]" \
-            "Full PATH to logfile.  (Default is '${HOME}/logs/$(basename "$0").log')")
-$(_usageCommands_ \
-            "-n, --dryrun" \
-            "Non-destructive. Makes no permanent changes." \
-            2)
-$(_usageCommands_ \
-            "-q, --quiet" \
-            "Quiet (no output)")
-$(_usageCommands_ \
-            "-v, --verbose" \
-            "Output more information. (Items echoed to 'verbose')")
-$(_usageCommands_ \
-            "--force" \
-            "Skip all user interaction.  Implied 'Yes' to all actions.")
+$(_columns_ -b -- '-h, --help' "Display this help and exit" 2)
+$(_columns_ -b -- "--loglevel [LEVEL]" "One of: FATAL, ERROR (default), WARN, INFO, NOTICE, DEBUG, ALL, OFF" 2)
+$(_columns_ -b -- "--logfile [FILE]" "Full PATH to logfile.  (Default is '\${HOME}/logs/$(basename "$0").log')" 2)
+$(_columns_ -b -- "-n, --dryrun" "Non-destructive. Makes no permanent changes." 2)
+$(_columns_ -b -- "-q, --quiet" "Quiet (no output)" 2)
+$(_columns_ -b -- "-v, --verbose" "Output more information. (Items echoed to 'verbose')" 2)
+$(_columns_ -b -- "--force" "Skip all user interaction.  Implied 'Yes' to all actions." 2)

  ${bold}${underline}Example Usage:${reset}

--- a/template_standalone.sh
+++ b/template_standalone.sh
@@ -600,47 +600,70 @@ _parseOptions_() {
    fi
 }

-_usageCommands_() {
+_columns_() {
    # DESC:
-    #					Used to add commands to the _usage_ function.  Prints commands and their descriptions
-    #         in two aligned columns.  Uses an option 4 character tab count to indent the commands.
+    #         Prints a two column output from a key/value pair.
+    #         Optionally pass a number of 2 space tabs to indent the output.
    # ARGS:
-    #         $1 (required): Key name (left column text)
-    #         $2 (required): Long value (right column text. Wraps around if too long)
-    #         $3 (optional): Number of 4 character tabs to indent the command (default 1)
+    #         $1 (required): Key name (Left column text)
+    #         $2 (required): Long value (Right column text. Wraps around if too long)
+    #         $3 (optional): Number of 2 character tabs to indent the command (default 1)
+    # OPTS:
+    #         -b    Bold the left column
+    #         -u    Underline the left column
+    #         -r    Reverse background and foreground colors
    # OUTS:
    #         stdout: Prints the output in columns
    # NOTE:
    #         Long text or ANSI colors in the first column may create display issues
    # USAGE:
-    #         _usageCommands_ "Key" "Long value text" [tab level]
+    #         _columns_ "Key" "Long value text" [tab level]

    [[ $# -lt 2 ]] && fatal "Missing required argument to ${FUNCNAME[0]}"

-    local _key="$1"
-    local _value="$2"
-    local _tabSize=4
+    local opt
+    local OPTIND=1
+    local _style=""
+    while getopts ":bBuUrR" opt; do
+        case ${opt} in
+            b | B) _style="${_style}${bold}" ;;
+            u | U) _style="${_style}${underline}" ;;
+            r | R) _style="${_style}${reverse}" ;;
+            *) fatal "Unrecognized option '${1}' passed to ${FUNCNAME[0]}. Exiting." ;;
+        esac
+    done
+    shift $((OPTIND - 1))
+
+    local _key="${1}"
+    local _value="${2}"
    local _tabLevel="${3-}"
+    local _tabSize=2
    local _line
    local _rightIndent
    local _leftIndent
    if [[ -z ${3-} ]]; then
-        _tabLevel=1
+        _tabLevel=0
    fi

    _leftIndent="$((_tabLevel * _tabSize))"

-    local _leftColumnWidth="$((32 - _leftIndent))"
+    local _leftColumnWidth="$((30 + _leftIndent))"

    if [ "$(tput cols)" -gt 180 ]; then
-        _rightIndent=80
+        _rightIndent=110
    elif [ "$(tput cols)" -gt 160 ]; then
-        _rightIndent=60
+        _rightIndent=90
    elif [ "$(tput cols)" -gt 130 ]; then
-        _rightIndent=30
+        _rightIndent=60
    elif [ "$(tput cols)" -gt 120 ]; then
-        _rightIndent=20
+        _rightIndent=50
    elif [ "$(tput cols)" -gt 110 ]; then
+        _rightIndent=40
+    elif [ "$(tput cols)" -gt 100 ]; then
+        _rightIndent=30
+    elif [ "$(tput cols)" -gt 90 ]; then
+        _rightIndent=20
+    elif [ "$(tput cols)" -gt 80 ]; then
        _rightIndent=10
    else
        _rightIndent=0
@@ -655,7 +678,7 @@ _usageCommands_() {
        else
            _key=" "
        fi
-        printf "%-${_leftIndent}s${bold}${white}%-${_leftColumnWidth}b${reset} %b\n" "" "${_key}${reset}" "${_line}"
+        printf "%-${_leftIndent}s${_style}%-${_leftColumnWidth}b${reset} %b\n" "" "${_key}${reset}" "${_line}"
    done <<<"$(fold -w${_rightWrapLength} -s <<<"${_value}")"
 }

@@ -667,28 +690,13 @@ _usage_() {
  This is a script template.  Edit this description to print help to users.

  ${bold}${underline}Options:${reset}
-$(_usageCommands_ \
-        "-h, --help" \
-        "Display this help and exit")
-$(_usageCommands_ \
-            "--loglevel [LEVEL]" \
-            "One of: FATAL, ERROR (default), WARN, INFO, NOTICE, DEBUG, ALL, OFF")
-$(_usageCommands_ \
-            "--logfile [FILE]" \
-            "Full PATH to logfile.  (Default is '${HOME}/logs/$(basename "$0").log')")
-$(_usageCommands_ \
-            "-n, --dryrun" \
-            "Non-destructive. Makes no permanent changes." \
-            2)
-$(_usageCommands_ \
-            "-q, --quiet" \
-            "Quiet (no output)")
-$(_usageCommands_ \
-            "-v, --verbose" \
-            "Output more information. (Items echoed to 'verbose')")
-$(_usageCommands_ \
-            "--force" \
-            "Skip all user interaction.  Implied 'Yes' to all actions.")
+$(_columns_ -b -- '-h, --help' "Display this help and exit" 2)
+$(_columns_ -b -- "--loglevel [LEVEL]" "One of: FATAL, ERROR (default), WARN, INFO, NOTICE, DEBUG, ALL, OFF" 2)
+$(_columns_ -b -- "--logfile [FILE]" "Full PATH to logfile.  (Default is '\${HOME}/logs/$(basename "$0").log')" 2)
+$(_columns_ -b -- "-n, --dryrun" "Non-destructive. Makes no permanent changes." 2)
+$(_columns_ -b -- "-q, --quiet" "Quiet (no output)" 2)
+$(_columns_ -b -- "-v, --verbose" "Output more information. (Items echoed to 'verbose')" 2)
+$(_columns_ -b -- "--force" "Skip all user interaction.  Implied 'Yes' to all actions." 2)

  ${bold}${underline}Example Usage:${reset}

--- a/utilities/alerts.bash
+++ b/utilities/alerts.bash
@@ -262,56 +262,6 @@ _centerOutput_() {
    printf "%s\n" "${_out}"
 }

-_columnizeOutput_() {
-    # DESC:
-    #         Creates a column output for key/value pairs with line wrapping for the right column (value). Attempts to wrap at a sane line length (~100 cols) on larger screens.
-    # ARGS:
-    #         $1 (required): Left padding of table
-    #         $2 (required): Width of first column
-    #         $3 (required): Key name (left column text)
-    #         $4 (required): Long value (right column text. Wraps around if too long)
-    # OUTS:
-    #         stdout: Prints the columnized output
-    # NOTE:
-    #         Long text or ANSI colors in the first column may create display issues
-    # USAGE:
-    #         _columnizeOutput_ 0 30 "Key" "Long value text"
-
-    [[ $# -lt 4 ]] && fatal "Missing required argument to ${FUNCNAME[0]}"
-
-    local _leftIndent=$1
-    local _leftColumn=$2
-    local _key="$3"
-    local _value="$4"
-    local _line
-    local _rightIndent
-
-    if [ "$(tput cols)" -gt 180 ]; then
-        _rightIndent=80
-    elif [ "$(tput cols)" -gt 160 ]; then
-        _rightIndent=60
-    elif [ "$(tput cols)" -gt 130 ]; then
-        _rightIndent=30
-    elif [ "$(tput cols)" -gt 120 ]; then
-        _rightIndent=20
-    elif [ "$(tput cols)" -gt 110 ]; then
-        _rightIndent=10
-    else
-        _rightIndent=0
-    fi
-    local _rightWrapLength=$(($(tput cols) - _leftColumn - _leftIndent - _rightIndent))
-
-    local _first_line=0
-    while read -r _line; do
-        if [[ ${_first_line} -eq 0 ]]; then
-            _first_line=1
-        else
-            _key=" "
-        fi
-        printf "%-${_leftIndent}s%-${_leftColumn}b %b\n" "" "${_key}" "${_line}"
-    done <<<"$(fold -w${_rightWrapLength} -s <<<"${_value}")"
-}
-
 _clearLine_() (
    # DESC:
    #					Clears output in the terminal on the specified line number.
@@ -335,47 +285,70 @@ _clearLine_() (
    fi
 )

-_usageCommands_() {
+_columns_() {
    # DESC:
-    #					Used to add commands to the _usage_ function.  Prints commands and their descriptions
-    #         in two aligned columns.  Uses an option 4 character tab count to indent the commands.
+    #         Prints a two column output from a key/value pair.
+    #         Optionally pass a number of 2 space tabs to indent the output.
    # ARGS:
-    #         $1 (required): Key name (left column text)
-    #         $2 (required): Long value (right column text. Wraps around if too long)
-    #         $3 (optional): Number of 4 character tabs to indent the command (default 1)
+    #         $1 (required): Key name (Left column text)
+    #         $2 (required): Long value (Right column text. Wraps around if too long)
+    #         $3 (optional): Number of 2 character tabs to indent the command (default 1)
+    # OPTS:
+    #         -b    Bold the left column
+    #         -u    Underline the left column
+    #         -r    Reverse background and foreground colors
    # OUTS:
    #         stdout: Prints the output in columns
    # NOTE:
    #         Long text or ANSI colors in the first column may create display issues
    # USAGE:
-    #         _usageCommands_ "Key" "Long value text" [tab level]
+    #         _columns_ "Key" "Long value text" [tab level]

    [[ $# -lt 2 ]] && fatal "Missing required argument to ${FUNCNAME[0]}"

-    local _key="$1"
-    local _value="$2"
-    local _tabSize=4
+    local opt
+    local OPTIND=1
+    local _style=""
+    while getopts ":bBuUrR" opt; do
+        case ${opt} in
+            b | B) _style="${_style}${bold}" ;;
+            u | U) _style="${_style}${underline}" ;;
+            r | R) _style="${_style}${reverse}" ;;
+            *) fatal "Unrecognized option '${1}' passed to ${FUNCNAME[0]}. Exiting." ;;
+        esac
+    done
+    shift $((OPTIND - 1))
+
+    local _key="${1}"
+    local _value="${2}"
    local _tabLevel="${3-}"
+    local _tabSize=2
    local _line
    local _rightIndent
    local _leftIndent
    if [[ -z ${3-} ]]; then
-        _tabLevel=1
+        _tabLevel=0
    fi

    _leftIndent="$((_tabLevel * _tabSize))"

-    local _leftColumnWidth="$((32 - _leftIndent))"
+    local _leftColumnWidth="$((30 + _leftIndent))"

    if [ "$(tput cols)" -gt 180 ]; then
-        _rightIndent=80
+        _rightIndent=110
    elif [ "$(tput cols)" -gt 160 ]; then
-        _rightIndent=60
+        _rightIndent=90
    elif [ "$(tput cols)" -gt 130 ]; then
-        _rightIndent=30
+        _rightIndent=60
    elif [ "$(tput cols)" -gt 120 ]; then
-        _rightIndent=20
+        _rightIndent=50
    elif [ "$(tput cols)" -gt 110 ]; then
+        _rightIndent=40
+    elif [ "$(tput cols)" -gt 100 ]; then
+        _rightIndent=30
+    elif [ "$(tput cols)" -gt 90 ]; then
+        _rightIndent=20
+    elif [ "$(tput cols)" -gt 80 ]; then
        _rightIndent=10
    else
        _rightIndent=0
@@ -390,6 +363,6 @@ _usageCommands_() {
        else
            _key=" "
        fi
-        printf "%-${_leftIndent}s${bold}${white}%-${_leftColumnWidth}b${reset} %b\n" "" "${_key}${reset}" "${_line}"
+        printf "%-${_leftIndent}s${_style}%-${_leftColumnWidth}b${reset} %b\n" "" "${_key}${reset}" "${_line}"
    done <<<"$(fold -w${_rightWrapLength} -s <<<"${_value}")"
 }