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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,69 +1,178 @@ | ||
| #!/usr/bin/env bash | ||
| ### Displays the file head and executes the chosen line, removing the first occurrence of '#' first. | ||
| ### Providing NUMBER from the interval [1..9] skips the interaction and executes the given line directly. | ||
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| fn_exec_header_line() { | ||
| local readonly me="util-hdx" | ||
| local arg1="$1" | ||
| local number=$2 | ||
| local line="" | ||
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| if [[ $# -eq 0 ]] ; then | ||
| echo "Displays the file head and executes the chosen line, removing the first occurrence of '#' first." | ||
| echo "Providing NUMBER from the interval [1..9] skips the interaction and executes the given line directly." | ||
| echo "usage: $me FILE [NUMBER]" | ||
| return 0 | ||
| fi | ||
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| if [ ! -f "$arg1" ] ; then echo "File [$arg1] not found!" ; return -1 ; fi | ||
| if [ $# -ge 2 ] ; then | ||
| if [[ $number -lt 1 || $number -gt 9 ]] ; then | ||
| echo "break" | ||
| echo "NUMBER must be from the interval [1..9]!" | ||
| return -1 | ||
| fi | ||
| fi | ||
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| if [ $# = 1 ] ; then | ||
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| # output the header numbering the lines | ||
| head $arg1 | cat -n | ||
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| read -rp $'Which line to execute? [1..9] ' -n1 key | ||
| if [[ "$key" = '' || "$key" -lt "1" || "$key" -gt "9" ]] ; then | ||
| # Space pressed, do something | ||
| # echo [$key] is empty when SPACE is pressed # uncomment to trace | ||
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| echo "break" | ||
| echo "The NUMBER must be from the interval [1..9]!" | ||
| return 0 | ||
| else | ||
| number=$key | ||
| fi | ||
| echo | ||
| fi | ||
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| # get the command line and replace the first '#' by space | ||
| line=$(tail -n +$number $arg1 | head -n 1) | ||
| line=${line/'#'/} | ||
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| if [ $# = 1 ] ; then | ||
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| # display the chosen line | ||
| echo "$line" | ||
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| read -rp $'Execute the line above? (y) ' -n1 key | ||
| if [ "$key" != "y" ] ; then | ||
| echo "break by user" | ||
| return 0 | ||
| fi | ||
| echo | ||
| fi | ||
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| echo | ||
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| # execute the chosen line | ||
| ($line) | ||
| #!/bin/bash | ||
| ### @accetto (https://github.com/accetto) (https://hub.docker.com/u/accetto/) | ||
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| # ARG_OPTIONAL_SINGLE([lines],[n],[Number of header lines to display],[10]) | ||
| # ARG_POSITIONAL_SINGLE([file],[File containing the commands]) | ||
| # ARG_POSITIONAL_SINGLE([line],[Number of the line to execute],[0]) | ||
| # ARG_VERSION([echo $0 v19.05.25]) | ||
| # ARG_HELP([Displays the file head and executes the chosen line, removing the first occurrence of '#' and trimming it from the left first.\nProviding the line number argument skips the interaction and executes the given line directly.]) | ||
| # ARG_OPTIONAL_BOOLEAN([echo],[],[Just print the command line to be executed]) | ||
| # ARGBASH_SET_INDENT([ ]) | ||
| # ARGBASH_GO() | ||
| # needed because of Argbash --> m4_ignore([ | ||
| ### START OF CODE GENERATED BY Argbash v2.8.0 one line above ### | ||
| # Argbash is a bash code generator used to get arguments parsing right. | ||
| # Argbash is FREE SOFTWARE, see https://argbash.io for more info | ||
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| die() | ||
| { | ||
| local _ret=$2 | ||
| test -n "$_ret" || _ret=1 | ||
| test "$_PRINT_HELP" = yes && print_help >&2 | ||
| echo "$1" >&2 | ||
| exit ${_ret} | ||
| } | ||
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| begins_with_short_option() | ||
| { | ||
| local first_option all_short_options='nvh' | ||
| first_option="${1:0:1}" | ||
| test "$all_short_options" = "${all_short_options/$first_option/}" && return 1 || return 0 | ||
| } | ||
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| # THE DEFAULTS INITIALIZATION - POSITIONALS | ||
| _positionals=() | ||
| _arg_line="0" | ||
| # THE DEFAULTS INITIALIZATION - OPTIONALS | ||
| _arg_lines="10" | ||
| _arg_echo="off" | ||
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| print_help() | ||
| { | ||
| printf '%s\n' "Displays the file head and executes the chosen line, removing the first occurrence of '#' and trimming it from the left first. | ||
| Providing the line number argument skips the interaction and executes the given line directly." | ||
| printf 'Usage: %s [-n|--lines <arg>] [-v|--version] [-h|--help] [--(no-)echo] <file> [<line>]\n' "$0" | ||
| printf '\t%s\n' "<file>: File containing the commands" | ||
| printf '\t%s\n' "<line>: Number of the line to execute (default: '0')" | ||
| printf '\t%s\n' "-n, --lines: Number of header lines to display (default: '10')" | ||
| printf '\t%s\n' "-v, --version: Prints version" | ||
| printf '\t%s\n' "-h, --help: Prints help" | ||
| printf '\t%s\n' "--echo, --no-echo: Just print the command line to be executed (off by default)" | ||
| } | ||
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| parse_commandline() | ||
| { | ||
| _positionals_count=0 | ||
| while test $# -gt 0 | ||
| do | ||
| _key="$1" | ||
| case "$_key" in | ||
| -n|--lines) | ||
| test $# -lt 2 && die "Missing value for the optional argument '$_key'." 1 | ||
| _arg_lines="$2" | ||
| shift | ||
| ;; | ||
| --lines=*) | ||
| _arg_lines="${_key##--lines=}" | ||
| ;; | ||
| -n*) | ||
| _arg_lines="${_key##-n}" | ||
| ;; | ||
| -v|--version) | ||
| echo $0 v19.05.25 | ||
| exit 0 | ||
| ;; | ||
| -v*) | ||
| echo $0 v19.05.25 | ||
| exit 0 | ||
| ;; | ||
| -h|--help) | ||
| print_help | ||
| exit 0 | ||
| ;; | ||
| -h*) | ||
| print_help | ||
| exit 0 | ||
| ;; | ||
| --no-echo|--echo) | ||
| _arg_echo="on" | ||
| test "${1:0:5}" = "--no-" && _arg_echo="off" | ||
| ;; | ||
| *) | ||
| _last_positional="$1" | ||
| _positionals+=("$_last_positional") | ||
| _positionals_count=$((_positionals_count + 1)) | ||
| ;; | ||
| esac | ||
| shift | ||
| done | ||
| } | ||
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| handle_passed_args_count() | ||
| { | ||
| local _required_args_string="'file'" | ||
| test "${_positionals_count}" -ge 1 || _PRINT_HELP=yes die "FATAL ERROR: Not enough positional arguments - we require between 1 and 2 (namely: $_required_args_string), but got only ${_positionals_count}." 1 | ||
| test "${_positionals_count}" -le 2 || _PRINT_HELP=yes die "FATAL ERROR: There were spurious positional arguments --- we expect between 1 and 2 (namely: $_required_args_string), but got ${_positionals_count} (the last one was: '${_last_positional}')." 1 | ||
| } | ||
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| fn_exec_header_line "$@" | ||
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| assign_positional_args() | ||
| { | ||
| local _positional_name _shift_for=$1 | ||
| _positional_names="_arg_file _arg_line " | ||
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| shift "$_shift_for" | ||
| for _positional_name in ${_positional_names} | ||
| do | ||
| test $# -gt 0 || break | ||
| eval "$_positional_name=\${1}" || die "Error during argument parsing, possibly an Argbash bug." 1 | ||
| shift | ||
| done | ||
| } | ||
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| parse_commandline "$@" | ||
| handle_passed_args_count | ||
| assign_positional_args 1 "${_positionals[@]}" | ||
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| # OTHER STUFF GENERATED BY Argbash | ||
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| ### END OF CODE GENERATED BY Argbash (sortof) ### ]) | ||
| # [ <-- needed because of Argbash | ||
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| _cmd="" | ||
| _input="" | ||
| _key='' | ||
| _line=$_arg_line | ||
| _size=10 | ||
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| [[ ! -f "$_arg_file" ]] && die "FAILED: File \"$_arg_file\" not found!" | ||
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| _size=$(wc -l < "$_arg_file") | ||
| [[ $_size -gt $_arg_lines ]] && _size=$_arg_lines | ||
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| if [[ $_line -le 0 ]] ; then | ||
| ### output the header numbering the lines | ||
| head -n $_size "$_arg_file" | cat -n | ||
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| ### get the line number | ||
| read -rp $'Which line to execute? ' _input | ||
| _input=$(echo $_input | grep -E "^[0-9]+$") | ||
| [[ $_input ]] && _line=$_input || die "INTERRUPTED: Numeric input required!" | ||
| [[ $_line -lt 1 || $_line -gt $_size ]] && die "FAILED: The line number must be from the interval [1..$_size]!" | ||
| fi | ||
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| ### get the command line, remove the first '#' and trim it from the left | ||
| _cmd=$(sed "${_line}q;d" "$_arg_file") | ||
| _cmd=$(echo $_cmd | sed -r -e 's/^\s*#\s*//g') | ||
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| ### display the line to be executed | ||
| echo $_cmd | ||
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| if [[ $_arg_line -eq 0 && "$_arg_echo" = "off" ]] ; then | ||
| ### get user confirmation | ||
| read -rp $'Execute the line above? (y) ' -n1 _key | ||
| echo | ||
| [[ "${_key,,}" != "y" ]] && die "INTERRUPTED" | ||
| fi | ||
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| if [[ "$_arg_echo" = "off" ]] ; then | ||
| ### execute the chosen line | ||
| $_cmd | ||
| fi | ||
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| # ] <-- needed because of Argbash |