update README
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README.org
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README.org
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sftrst=$'\e[0m';sftbf=$'\e[1m';sftdim=$'\e[2m';sftul=$'\e[4m';sftblink=$'\e[5m';sftinv=$'\e[7m';sfthide=$'\e[8m';sftk=$'\e[30m';sftr=$'\e[31m';sftg=$'\e[32m';sfty=$'\e[33m';sftb=$'\e[34m';sftm=$'\e[35m';sftc=$'\e[36m';sftw=$'\e[97m';function _sferr { echo -e "${sftbf}${sftr}SF PARSE ERROR${sftrst} $1";exit 1;};function sferr { echo -e "${sftbf}${sftr}ERROR${sftrst} $1";if [ -z "$2" ];then exit 1;fi;};function sfwarn { echo -e "${sftbf}${sfty}WARNING${sftrst} $1";};OLDIFS=$IFS;IFS=";";_sfphead="";_sfpdesc="";_sfodesc="";_sfexamples="";_sfpargs=();declare -A _sfflags;declare -A _sfargs;for a in "${sfargs[@]}";do _sfsubst=${a//";"};_sfcount="$(((${#a} - ${#_sfsubst})))";if [ $_sfcount -eq 1 ];then read -r -a _sfparsearr<<<"${a}";_sfpargs+=("${_sfparsearr[0]}");_sfphead="$_sfphead ${_sfparsearr[0]}";_sfpdesc="$_sfpdesc ${_sfparsearr[0]};${_sfparsearr[1]}\n";elif [ $_sfcount -eq 2 ];then read -r -a _sfparsearr<<<"${a}";_sfflags["-${_sfparsearr[1]}"]="${_sfparsearr[0]}";_sfflags["--${_sfparsearr[0]}"]="${_sfparsearr[0]}";declare ${_sfparsearr[0]}=false;_sfodesc="$_sfodesc -${_sfparsearr[1]}, --${_sfparsearr[0]};${_sfparsearr[2]}\n";elif [ $_sfcount -eq 4 ];then read -r -a _sfparsearr<<<"${a}";_sfargs["-${_sfparsearr[1]}"]="${_sfparsearr[0]}";_sfargs["--${_sfparsearr[0]}"]="${_sfparsearr[0]}";declare ${_sfparsearr[0]}="${_sfparsearr[3]}";_sfodesc="$_sfodesc -${_sfparsearr[1]}, --${_sfparsearr[0]} ${_sfparsearr[2]};${_sfparsearr[4]} (default: ${_sfparsearr[3]})\n";else _sferr "Wrong argument declaration: $a";fi;done;for e in "${sfexamples[@]}";do _sfsubst=${e//";"};_sfcount="$(((${#e} - ${#_sfsubst})))";if [ $_sfcount -eq 1 ];then read -r -a _sfparsearr<<<"${e}";_sfexamples="$_sfexamples ${_sfparsearr[0]};${_sfparsearr[1]}\n";else _sferr "Wrong example declaration: $e";fi;done;IFS=$OLDIFS;function sfusage { echo -n "Usage: $(basename $0)";if [ "$_sfodesc" != "" ];then echo -n " OPTIONS";fi;echo -e "$_sfphead";if [ ! -z ${sfdesc+x} ];then echo -e "\n$sfdesc";fi;if [ "$_sfpdesc" != "" ];then echo -e "\nPOSITIONAL ARGUMENTS";echo -e "$_sfpdesc"|column -c 80 -s ";" -t -W 2;fi;if [ "$_sfodesc" != "" ];then echo -e "\nOPTIONS";echo -e "$_sfodesc"|column -c 80 -s ";" -t -W 2;fi;if [ "$_sfexamples" != "" ];then echo -e "\nEXAMPLES";echo -e "$_sfexamples"|column -c 80 -s ";" -t -W 2;fi;if [ ! -z ${sfextra+x} ];then echo -e "\n$sfextra";fi;exit 0;};for a in "$@";do if [ "$a" == "-h" ]||[ "$a" == "--help" ];then sfusage;fi;done;while(("$#"));do if [ ! -z ${_sfflags["$1"]} ];then declare ${_sfflags["$1"]}=true;elif [ ! -z ${_sfargs["$1"]} ];then if [ -n "$2" ]&&[ "${2:0:1}" != "-" ];then declare ${_sfargs["$1"]}="$2";shift;else sferr "Argument for '$1' missing";fi;else if [ "${1:0:1}" == "-" ];then sferr "Unsupported argument: $1";else if [ "${#_sfpargs[@]}" != 0 ];then declare ${_sfpargs[0]}="$1";_sfpargs=("${_sfpargs[@]:1}");else sferr "Too many positional arguments";fi;fi;fi;shift;done;if [ ${#_sfpargs[@]} != 0 ];then for p in "${_sfpargs[@]}";do sferr "Positional argument '$p' missing" 0;done;exit 1;fi
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sftrst=$'\e[0m';sftbf=$'\e[1m';sftdim=$'\e[2m';sftul=$'\e[4m';sftblink=$'\e[5m';sftinv=$'\e[7m';sfthide=$'\e[8m';sftk=$'\e[30m';sftr=$'\e[31m';sftg=$'\e[32m';sfty=$'\e[33m';sftb=$'\e[34m';sftm=$'\e[35m';sftc=$'\e[36m';sftw=$'\e[97m';function _sferr { echo -e "${sftbf}${sftr}SF PARSE ERROR${sftrst} $1";exit 1;};function sferr { echo -e "${sftbf}${sftr}ERROR${sftrst} $1";if [ -z "$2" ];then exit 1;fi;};function sfwarn { echo -e "${sftbf}${sfty}WARNING${sftrst} $1";};OLDIFS=$IFS;IFS=";";_sfphead="";_sfpdesc="";_sfodesc="";_sfexamples="";_sfpargs=();declare -A _sfflags;declare -A _sfargs;for a in "${sfargs[@]}";do _sfsubst=${a//";"};_sfcount="$(((${#a} - ${#_sfsubst})))";if [ $_sfcount -eq 1 ];then read -r -a _sfparsearr<<<"${a}";_sfpargs+=("${_sfparsearr[0]}");_sfphead="$_sfphead ${_sfparsearr[0]}";_sfpdesc="$_sfpdesc ${_sfparsearr[0]};${_sfparsearr[1]}\n";elif [ $_sfcount -eq 2 ];then read -r -a _sfparsearr<<<"${a}";_sfflags["-${_sfparsearr[1]}"]="${_sfparsearr[0]}";_sfflags["--${_sfparsearr[0]}"]="${_sfparsearr[0]}";declare ${_sfparsearr[0]}=false;_sfodesc="$_sfodesc -${_sfparsearr[1]}, --${_sfparsearr[0]};${_sfparsearr[2]}\n";elif [ $_sfcount -eq 4 ];then read -r -a _sfparsearr<<<"${a}";_sfargs["-${_sfparsearr[1]}"]="${_sfparsearr[0]}";_sfargs["--${_sfparsearr[0]}"]="${_sfparsearr[0]}";declare ${_sfparsearr[0]}="${_sfparsearr[3]}";_sfodesc="$_sfodesc -${_sfparsearr[1]}, --${_sfparsearr[0]} ${_sfparsearr[2]};${_sfparsearr[4]} (default: ${_sfparsearr[3]})\n";else _sferr "Wrong argument declaration: $a";fi;done;for e in "${sfexamples[@]}";do _sfsubst=${e//";"};_sfcount="$(((${#e} - ${#_sfsubst})))";if [ $_sfcount -eq 1 ];then read -r -a _sfparsearr<<<"${e}";_sfexamples="$_sfexamples ${_sfparsearr[0]};${_sfparsearr[1]}\n";else _sferr "Wrong example declaration: $e";fi;done;IFS=$OLDIFS;function sfusage { echo -n "Usage: $(basename $0)";if [ "$_sfodesc" != "" ];then echo -n " OPTIONS";fi;echo -e "$_sfphead";if [ ! -z ${sfdesc+x} ];then echo -e "\n$sfdesc";fi;if [ "$_sfpdesc" != "" ];then echo -e "\nPOSITIONAL ARGUMENTS";echo -e "$_sfpdesc"|column -c 80 -s ";" -t -W 2;fi;if [ "$_sfodesc" != "" ];then echo -e "\nOPTIONS";echo -e "$_sfodesc"|column -c 80 -s ";" -t -W 2;fi;if [ "$_sfexamples" != "" ];then echo -e "\nEXAMPLES";echo -e "$_sfexamples"|column -c 80 -s ";" -t -W 2;fi;if [ ! -z ${sfextra+x} ];then echo -e "\n$sfextra";fi;exit 0;};for a in "$@";do if [ "$a" == "-h" ]||[ "$a" == "--help" ];then sfusage;fi;done;while(("$#"));do if [ ! -z ${_sfflags["$1"]} ];then declare ${_sfflags["$1"]}=true;elif [ ! -z ${_sfargs["$1"]} ];then if [ -n "$2" ]&&[ "${2:0:1}" != "-" ];then declare ${_sfargs["$1"]}="$2";shift;else sferr "Argument for '$1' missing";fi;else if [ "${1:0:1}" == "-" ];then sferr "Unsupported argument: $1";else if [ "${#_sfpargs[@]}" != 0 ];then declare ${_sfpargs[0]}="$1";_sfpargs=("${_sfpargs[@]:1}");else sferr "Too many positional arguments";fi;fi;fi;shift;done;if [ ${#_sfpargs[@]} != 0 ];then for p in "${_sfpargs[@]}";do sferr "Positional argument '$p' missing" 0;done;exit 1;fi
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#+end_src
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#+end_src
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* Usage
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** Usage
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The general usage for writing a script with /sf/ is:
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The general usage for writing a script with /sf/ is:
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1. Declare /sf/-variables at the top of your script
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1. Declare /sf/-variables at the top of your script
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2. Include /sf/
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2. Include /sf/
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3. Write your script with already parsed arguments and useful output functions/text formatting variables
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3. Write your script with already parsed arguments and useful output functions/text formatting variables
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** 1. /sf/-variables
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*** 1. /sf/-variables
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This is the list of variables which can be set *before* including /sf/.
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This is the list of variables which can be set *before* including /sf/.
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Every variable is optional.
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Every variable is optional.
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| Name | Description | Example |
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| Name | Description | Example |
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|--------------+-----------------------------------------------------------------------------------------------------+--------------------------------------|
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|--------------+-----------------------------------------------------------------------------------------------------+--------------------------------------|
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| =sfdesc= | Description of the script | ~sfdesc="This script does nothing."~ |
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| =sfdesc= | Description of the script | ~sfdesc="This script does nothing."~ |
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| =sfargs= | Array for declaration of arguments, positional arguments and flags. Look below for more information | See [[#sfargs][below]] |
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| =sfargs= | Array for declaration of arguments, positional arguments and flags. Look below for more information | See [[#sfargs][below]] |
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| =sfexamples= | Array for declaration of examples for the usage output. Look below for more information | See also [[#sfexamples][below]] |
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| =sfexamples= | Array for declaration of examples for the usage output. Look below for more information | See also [[#sfexamples][below]] |
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| =sfextra= | Additional usage output | ~sfextra="No copyright."~ |
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| =sfextra= | Additional usage output | ~sfextra="No copyright."~ |
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A complete example which uses every variable can be found [[#example][below]].
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A complete example which uses every variable can be found [[#example][below]].
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*** =sfargs=
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**** =sfargs=
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:properties:
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:properties:
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:custom_id: sfargs
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:custom_id: sfargs
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:end:
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:end:
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This is an array of strings.
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This is an array of strings.
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Every string defines an argument, a flag or an positional argument of the script.
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Every string defines an argument, a flag or an positional argument of the script.
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The type is defined by the amount of semicolons in the string.
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The type is defined by the amount of semicolons in the string.
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| Type | Declaration order | Example |
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| Type | Declaration order | Example |
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|---------------------+-----------------------------------------------------------------+---------------------------------------------------------|
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|---------------------+-----------------------------------------------------------------+---------------------------------------------------------|
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| Positional argument | =<name>;<description>= | ~sfargs+=("FILE;File to read")~ |
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| Positional argument | =<name>;<description>= | ~sfargs+=("FILE;File to read")~ |
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| Flag | =<name>;<shorthand>;<description>= | ~sfargs+=("verbose;v;Enable verbose output")~ |
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| Flag | =<name>;<shorthand>;<description>= | ~sfargs+=("verbose;v;Enable verbose output")~ |
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| Argument | =<name>;<shorthand>;<value_name>;<default_value>;<description>= | ~sfargs+=("text;t;TEXT;done;Print TEXT when finished")~ |
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| Argument | =<name>;<shorthand>;<value_name>;<default_value>;<description>= | ~sfargs+=("text;t;TEXT;done;Print TEXT when finished")~ |
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The order of declaration defines the order in the usage output.
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The order of declaration defines the order in the usage output.
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*** =sfexamples=
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**** =sfexamples=
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:properties:
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:properties:
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:custom_id: sfexamples
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:custom_id: sfexamples
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:end:
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:end:
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This is also an array of strings.
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This is also an array of strings.
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Examples are of the form =<command>;<description>= and can be added to /sf/ like this:
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Examples are of the form =<command>;<description>= and can be added to /sf/ like this:
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: sfexamples+=("count 8;Count to eight")
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: sfexamples+=("count 8;Count to eight")
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** 2. Including /sf/
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*** 2. Include /sf/
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Grab the =sf= file from the repo, place it next to your script and source it with
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Grab the =sf= file from the repo, place it next to your script and source it with
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#+begin_src sh
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source "$(dirname $0)/sf"
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#+end_src
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*Or* just copy and paste the oneliner from above.
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** 3. Write your script
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/sf/ deals with missing inputs and handles the parsing of arguments.
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This means that after /sf/ was included *you can be sure that all variables have assigned values*.
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Flags are either =false= or =true=, arguments have a provided value or the default value and positional arguments have a provided value.
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The values are stored in variables with the name =$<name>=.
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If you declared for example a flag like this:
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#+begin_src sh
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sfargs+=("verbose:v:Enable verbose output")
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#+end_src
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Then the variable =$verbose= exists with a value of either =false= or =true=.
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*** Output functions
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/sf/ provides two output functions which can be used to throw warnings and errors.
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| =sfwarn= | Takes a string as input and prints a warning |
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| =sferr= | Takes a string as input, prints an error and exits with code 1. If an additional argument is passed (doesn't matter what), it will just throw an error and don't exit |
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Additionally the usage function is available:
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| =sfusage= | Output the usage of the script and exit with code 0 |
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*** Text formatting variables
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The following text formatting variables can be used to modify the output:
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| =sftrst= | Reset formatting |
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| =sftbf= | Bold |
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| =sftdim= | Dim |
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| =sftul= | Underline |
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| =sftblink= | Blinking |
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| =sftinv= | Invert foreground/background |
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| =sfthide= | Hidden |
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| =sftk= | Black |
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| =sftr= | Red |
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| =sftg= | Green |
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| =sfty= | Yellow |
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| =sftb= | Blue |
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| =sftm= | Magenta |
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| =sftc= | Cyan |
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| =sftw= | White |
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The variables can be used directly in =echo=, no =-e= needed.
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To echo the word "framework" bold and red use the variables for example like this:
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#+begin_src sh
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#+begin_src sh
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echo "${sftbf}${sftr}framework${sftrst}"
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source "$(dirname $0)/sf"
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#+end_src
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#+end_src
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* Example
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*Or* just copy and paste the oneliner from above.
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:properties:
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:custom_id: example
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:end:
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Here is an example script which uses /sf/:
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*** 3. Write your script
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#+begin_src sh
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/sf/ deals with missing inputs and handles the parsing of arguments.
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#!/usr/bin/env bash
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This means that after /sf/ was included *you can be sure that all variables have assigned values*.
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Flags are either =false= or =true=, arguments have a provided value or the default value and positional arguments have a provided value.
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# ----------------------
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The values are stored in variables with the name =$<name>=.
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# sf -- script framework
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If you declared for example a flag like this:
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# ----------------------
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# Declare sf variables
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#+begin_src sh
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sfdesc="A simple counter."
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sfargs+=("verbose:v:Enable verbose output")
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#+end_src
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sfargs+=("N;Number to count")
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Then the variable =$verbose= exists with a value of either =false= or =true=.
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sfargs+=("reverse;r;Count reverse")
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sfargs+=("text;t;TEXT;done;Print TEXT when finished counting")
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sfexamples+=("count 8;Count to eight")
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**** Output functions
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sfexamples+=("count -r -t go 3;Count reverse from 3 and print 'go'")
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sfextra="No copyright at all."
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/sf/ provides two output functions which can be used to throw warnings and errors.
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# Include sf, this could be replaced with a long oneliner
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| =sfwarn= | Takes a string as input and prints a warning |
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source "$(dirname $0)/sf"
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| =sferr= | Takes a string as input, prints an error and exits with code 1. If an additional argument is passed (doesn't matter what), it will just throw an error and don't exit |
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# ----------------------
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Additionally the usage function is available:
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# Actual script
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# ----------------------
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if [ "$N" -ge 11 ]; then # Use parsed argument
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| =sfusage= | Output the usage of the script and exit with code 0 |
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sferr "I can only count to/from 10" # Throw an error and exit
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fi
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counter="$N" # Use parsed argument
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**** Text formatting variables
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echo -n "$sftbf" # Print everyting from here bold
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while [ "$counter" -ge 1 ]; do
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if [ "$reverse" == true ]; then # Use parsed argument
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echo " $counter"
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else
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echo " $(expr $N - $counter + 1)" # Use parsed argument
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fi
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counter=$(expr $counter - 1)
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sleep 1
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done
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echo -n "$sftrst" # Reset text formatting
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echo "$text" # Use parsed argument
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#+end_src
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The usage output of the above script is:
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The following text formatting variables can be used to modify the output:
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#+begin_example
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| =sftrst= | Reset formatting |
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Usage: count OPTIONS N
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| =sftbf= | Bold |
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| =sftdim= | Dim |
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| =sftul= | Underline |
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| =sftblink= | Blinking |
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| =sftinv= | Invert foreground/background |
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| =sfthide= | Hidden |
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| =sftk= | Black |
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| =sftr= | Red |
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| =sftg= | Green |
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| =sfty= | Yellow |
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| =sftb= | Blue |
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| =sftm= | Magenta |
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| =sftc= | Cyan |
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| =sftw= | White |
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A simple counter.
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The variables can be used directly in =echo=, no =-e= needed.
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To echo the word "framework" bold and red use the variables for example like this:
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POSITIONAL ARGUMENTS
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#+begin_src sh
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N Number to count
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echo "${sftbf}${sftr}framework${sftrst}"
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#+end_src
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OPTIONS
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** Example
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-r, --reverse Count reverse
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:properties:
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-t, --text TEXT Print TEXT when finished counting (default: done)
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:custom_id: example
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:end:
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EXAMPLES
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Here is an example script which uses /sf/:
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count 8 Count to eight
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count -r -t go 3 Count reverse from 3 and print 'go'
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No copyright at all.
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#+begin_src sh
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#+end_example
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#!/usr/bin/env bash
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# ----------------------
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# sf -- script framework
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# ----------------------
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# Declare sf variables
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sfdesc="A simple counter."
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sfargs+=("N;Number to count")
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sfargs+=("reverse;r;Count reverse")
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||||||
|
sfargs+=("text;t;TEXT;done;Print TEXT when finished counting")
|
||||||
|
|
||||||
|
sfexamples+=("count 8;Count to eight")
|
||||||
|
sfexamples+=("count -r -t go 3;Count reverse from 3 and print 'go'")
|
||||||
|
|
||||||
|
sfextra="No copyright at all."
|
||||||
|
|
||||||
|
# Include sf, this could be replaced with a long oneliner
|
||||||
|
source "$(dirname $0)/sf"
|
||||||
|
|
||||||
|
# ----------------------
|
||||||
|
# Actual script
|
||||||
|
# ----------------------
|
||||||
|
|
||||||
|
if [ "$N" -ge 11 ]; then # Use parsed argument
|
||||||
|
sferr "I can only count to/from 10" # Throw an error and exit
|
||||||
|
fi
|
||||||
|
|
||||||
|
counter="$N" # Use parsed argument
|
||||||
|
echo -n "$sftbf" # Print everyting from here bold
|
||||||
|
while [ "$counter" -ge 1 ]; do
|
||||||
|
if [ "$reverse" == true ]; then # Use parsed argument
|
||||||
|
echo " $counter"
|
||||||
|
else
|
||||||
|
echo " $(expr $N - $counter + 1)" # Use parsed argument
|
||||||
|
fi
|
||||||
|
counter=$(expr $counter - 1)
|
||||||
|
sleep 1
|
||||||
|
done
|
||||||
|
echo -n "$sftrst" # Reset text formatting
|
||||||
|
echo "$text" # Use parsed argument
|
||||||
|
#+end_src
|
||||||
|
|
||||||
|
The usage output of the above script is:
|
||||||
|
|
||||||
|
#+begin_example
|
||||||
|
Usage: count OPTIONS N
|
||||||
|
|
||||||
|
A simple counter.
|
||||||
|
|
||||||
|
POSITIONAL ARGUMENTS
|
||||||
|
N Number to count
|
||||||
|
|
||||||
|
OPTIONS
|
||||||
|
-r, --reverse Count reverse
|
||||||
|
-t, --text TEXT Print TEXT when finished counting (default: done)
|
||||||
|
|
||||||
|
EXAMPLES
|
||||||
|
count 8 Count to eight
|
||||||
|
count -r -t go 3 Count reverse from 3 and print 'go'
|
||||||
|
|
||||||
|
No copyright at all.
|
||||||
|
#+end_example
|
||||||
|
|
|
||||||
Loading…
Add table
Add a link
Reference in a new issue