Bash – Developer Blog

10Feb

Bash | Cookbook

by Ralph Bash, Cookbook, Shell

Configure Bash Environment

Using Bash Completion

Add git completion

Download git-completion.bash to $HOME/etc

$mkdir$ HOME/etc

$ cd $HOME/etc

$ wget https://raw.githubusercontent.com/git/git/master/contrib/completion/git-completion.bash

$mkdir$ HOME/etc

$cd$ HOME/etc $ wget https://raw.githubusercontent.com/git/git/master/contrib/completion/git-completion.bash

$ mkdir $HOME/etc
$ cd $HOME/etc
$ wget https://raw.githubusercontent.com/git/git/master/contrib/completion/git-completion.bash

Add git-prompt to .bashrc

. $HOME/etc/git-completion.sh

. $HOME/etc/git-completion.sh

Add completion for Makefiles

Add this to .bashrc

complete -W "`grep -oE '^[a-zA-Z0-9_.-]+:([^=]|

$)' ?akefile | sed 's/[^a-zA-Z0-9_.-]*$ //'`" make

complete -W "`grep -oE '^[a-zA-Z0-9_.-]+:([^=]|

$)' ?akefile | sed 's/[^a-zA-Z0-9_.-]*$ //'`" make

complete -W "`grep -oE '^[a-zA-Z0-9_.-]+:([^=]|$)' ?akefile | sed 's/[^a-zA-Z0-9_.-]*$//'`" make

Customize Bash prompt

Add git repository/branch to prompt

Download git-prompt.sh to $HOME/etc

$mkdir -p$ HOME/etc

$ cd $HOME/etc

$ wget https://raw.githubusercontent.com/git/git/master/contrib/completion/git-prompt.sh

$mkdir -p$ HOME/etc

$cd$ HOME/etc $ wget https://raw.githubusercontent.com/git/git/master/contrib/completion/git-prompt.sh

$ mkdir -p $HOME/etc
$ cd $HOME/etc
$ wget https://raw.githubusercontent.com/git/git/master/contrib/completion/git-prompt.sh

Add git-prompt to .bashrc

. $HOME/etc/git-prompt.sh

. $HOME/etc/git-prompt.sh

Configure prompt to display git branch

export PS1='[\033[33;1m]\w[\033[m] [\033[32m]$(__git_ps1 " (

<h2 class="wp-block-heading">Writing Bash Scripts</h2>

<h3 class="wp-block-heading">Set vi commands in bash-script</h3>

<h3 class="wp-block-heading">Parsing Parameter</h3>

<pre class="EnlighterJSRAW" data-enlighter-language="shell" data-enlighter-theme="" data-enlighter-highlight="" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">$ brew install gnu-getopt</pre><p>Bash Script Template</p><pre class="EnlighterJSRAW" data-enlighter-language="shell" data-enlighter-theme="" data-enlighter-highlight="" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">#------------------------------------------------------------------------------------------

CMD_GETOPT=/usr/local/opt/gnu-getopt/bin/getopt

S_OPTS="vdm:"

L_OPTS="verbose,debug,versions,install:,init:"

OPTS=

$($ CMD_GETOPT --options "

$S_OPTS"--longoptions "$ L_OPTS" -- "$@")

eval set $OPTS

shift

while [[ $# -gt 0 ]]; do

echo "Param 1: '$1'"

case "$1" in

-v | --verbose) VERBOSE=true; ;;

-d | --debug) DEBUGLEVEL="$2"; shift ;;

--versions) MODE=GETVERSIONS ;;

--install) TYPE="$2"; shift

MODE=INSTALL ;;

--init) MODE=INIT ;;

--) shift; break;;

* ) break;;

esac

shift

done</pre><h2 class="wp-block-heading">Show progress with a spinner</h2><pre class="EnlighterJSRAW" data-enlighter-language="shell" data-enlighter-theme="" data-enlighter-highlight="" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">#!/bin/bash

COMMAND="${1^^}"

SYMBOL_PASS="$(printf '\e[0;32m\xe2\x9c\x94\e[0m')"

SPINNER_STATE='\|/-'

spinner()

{

local _lastpos=$((${#SPINNER_STATE}-1))

SPINNER_STATE="

${SPINNER_STATE:$_lastpos:1}$ {SPINNER_STATE:0:$_lastpos}"

printf "

}

#---------------------------------------------------------------------------------------------------

if [[ "$COMMAND" = "STEP1" ]]; then

printf "

_LASTDATE=

for _LINE in *.csv

_FILE="

$(basename$ _LINE)"

_CURRDATE=${_FILE:19:8}

rm -rf $_CURRDATE

mkdir -p $_CURRDATE

cp $_LINE $_CURRDATE

if [[ "$_CURRDATE" = "$_LASTDATE" ]]; then

spinner

else

printf "

${SYMBOL_PASS}\n$ {_CURRDATE}: "

_LASTDATE=$_CURRDATE

done

printf "\n"

fi</pre>

export PS1='[\033[33;1m]\w[\033[m] [\033[32m]

$(__git_ps1 " ( <h2 class="wp-block-heading">Writing Bash Scripts</h2> <h3 class="wp-block-heading">Set vi commands in bash-script</h3> <h3 class="wp-block-heading">Parsing Parameter</h3> <pre class="EnlighterJSRAW" data-enlighter-language="shell" data-enlighter-theme="" data-enlighter-highlight="" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">$ brew install gnu-getopt</pre><p>Bash Script Template</p><pre class="EnlighterJSRAW" data-enlighter-language="shell" data-enlighter-theme="" data-enlighter-highlight="" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">#------------------------------------------------------------------------------------------ CMD_GETOPT=/usr/local/opt/gnu-getopt/bin/getopt S_OPTS="vdm:" L_OPTS="verbose,debug,versions,install:,init:" OPTS=

$($ CMD_GETOPT --options "

$S_OPTS"--longoptions "$ L_OPTS" -- "

$@") eval set$ OPTS shift while [[

$# -gt 0 ]]; do echo "Param 1: '$ 1'" case "

$1" in -v | --verbose) VERBOSE=true; ;; -d | --debug) DEBUGLEVEL="$ 2"; shift ;; --versions) MODE=GETVERSIONS ;; --install) TYPE="

$2"; shift MODE=INSTALL ;; --init) MODE=INIT ;; --) shift; break;; * ) break;; esac shift done</pre><h2 class="wp-block-heading">Show progress with a spinner</h2><pre class="EnlighterJSRAW" data-enlighter-language="shell" data-enlighter-theme="" data-enlighter-highlight="" data-enlighter-linenumbers="" data-enlighter-lineoffset="" data-enlighter-title="" data-enlighter-group="">#!/bin/bash COMMAND="$ {1^^}" SYMBOL_PASS="

$(printf '\e[0;32m\xe2\x9c\x94\e[0m')" SPINNER_STATE='\|/-' spinner() { local _lastpos=$((${#SPINNER_STATE}-1)) SPINNER_STATE="${SPINNER_STATE:$_lastpos:1}${SPINNER_STATE:0:$_lastpos}" printf " } #--------------------------------------------------------------------------------------------------- # #--------------------------------------------------------------------------------------------------- if [[ "$ COMMAND" = "STEP1" ]]; then printf " _LASTDATE= for _LINE in *.csv do _FILE="

$(basename$ _LINE)" _CURRDATE=

${_FILE:19:8} rm -rf$ _CURRDATE mkdir -p

$_CURRDATE cp$ _LINE

$_CURRDATE if [[ "$ _CURRDATE" = "

$_LASTDATE" ]]; then spinner else printf "$ {SYMBOL_PASS}\n

${_CURRDATE}: " fi _LASTDATE=$ _CURRDATE done printf "\n" fi</pre>

export PS1='[\033[33;1m]\w[\033[m] [\033[32m]$(__git_ps1 " (



Writing Bash Scripts



Set vi commands in bash-script



 



Parsing Parameter



 



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EnlighterJS 3 Syntax Highlighter
$ brew install gnu-getopt
$ brew install gnu-getopt
$ brew install gnu-getopt
Bash Script Template
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#------------------------------------------------------------------------------------------
CMD_GETOPT=/usr/local/opt/gnu-getopt/bin/getopt
S_OPTS="vdm:"
L_OPTS="verbose,debug,versions,install:,init:"
OPTS=$($CMD_GETOPT --options "$S_OPTS"--longoptions "$L_OPTS"    -- "$@")
eval set $OPTS
shift
while [[ $# -gt 0 ]]; do
    echo "Param 1: '$1'"
    case "$1" in
        -v | --verbose)    VERBOSE=true;                 ;;
        -d | --debug)      DEBUGLEVEL="$2";  shift       ;;
        --versions)        MODE=GETVERSIONS              ;;
        --install)         TYPE="$2";        shift
                           MODE=INSTALL                  ;;
        --init)            MODE=INIT                     ;;
        --)                                  shift; break;;
        * )                                         break;;
    esac
    shift
done
#------------------------------------------------------------------------------------------
CMD_GETOPT=/usr/local/opt/gnu-getopt/bin/getopt

S_OPTS="vdm:"
L_OPTS="verbose,debug,versions,install:,init:"

OPTS=$($CMD_GETOPT --options "$S_OPTS"--longoptions "$L_OPTS"    -- "$@")

eval set $OPTS
shift

while [[ $# -gt 0 ]]; do
    echo "Param 1: '$1'"

    case "$1" in
        -v | --verbose)    VERBOSE=true;                 ;;
        -d | --debug)      DEBUGLEVEL="$2";  shift       ;;

        --versions)        MODE=GETVERSIONS              ;;
        --install)         TYPE="$2";        shift
                           MODE=INSTALL                  ;;

        --init)            MODE=INIT                     ;;

        --)                                  shift; break;;
        * )                                         break;;
    esac

    shift
done
#------------------------------------------------------------------------------------------
CMD_GETOPT=/usr/local/opt/gnu-getopt/bin/getopt

S_OPTS="vdm:"
L_OPTS="verbose,debug,versions,install:,init:"

OPTS=$($CMD_GETOPT --options "$S_OPTS"--longoptions "$L_OPTS"    -- "$@")

eval set $OPTS
shift

while [[ $# -gt 0 ]]; do
    echo "Param 1: '$1'"

    case "$1" in
        -v | --verbose)    VERBOSE=true;                 ;;
        -d | --debug)      DEBUGLEVEL="$2";  shift       ;;

        --versions)        MODE=GETVERSIONS              ;;
        --install)         TYPE="$2";        shift
                           MODE=INSTALL                  ;;

        --init)            MODE=INIT                     ;;

        --)                                  shift; break;;
        * )                                         break;;
    esac

    shift
done
Show progress with a spinner
Plain text
Copy to clipboard
Open code in new window
EnlighterJS 3 Syntax Highlighter
#!/bin/bash
 
COMMAND="${1^^}"
 
SYMBOL_PASS="$(printf '\e[0;32m\xe2\x9c\x94\e[0m')"
SPINNER_STATE='\|/-'
 
spinner()
{
        local _lastpos=$((${#SPINNER_STATE}-1))
        SPINNER_STATE="${SPINNER_STATE:$_lastpos:1}${SPINNER_STATE:0:$_lastpos}"
 
        printf "
}
 
#---------------------------------------------------------------------------------------------------
#
#---------------------------------------------------------------------------------------------------
if [[ "$COMMAND" = "STEP1" ]]; then
        printf "
        _LASTDATE=
        for _LINE in *.csv
        do
                _FILE="$(basename $_LINE)"
                _CURRDATE=${_FILE:19:8}
                rm    -rf       $_CURRDATE
                mkdir -p        $_CURRDATE
                cp       $_LINE $_CURRDATE
 
                if [[ "$_CURRDATE" = "$_LASTDATE" ]]; then
                        spinner
                else
                        printf "${SYMBOL_PASS}\n${_CURRDATE}: "
                fi
 
                _LASTDATE=$_CURRDATE
        done
        printf "\n"
fi
#!/bin/bash
 
COMMAND="${1^^}"
 
SYMBOL_PASS="$(printf '\e[0;32m\xe2\x9c\x94\e[0m')"
SPINNER_STATE='\|/-'
 
spinner()
{
        local _lastpos=$((${#SPINNER_STATE}-1))
        SPINNER_STATE="${SPINNER_STATE:$_lastpos:1}${SPINNER_STATE:0:$_lastpos}"
 
        printf "
}
 
#---------------------------------------------------------------------------------------------------
#
#---------------------------------------------------------------------------------------------------
if [[ "$COMMAND" = "STEP1" ]]; then
        printf "
        _LASTDATE=
        for _LINE in *.csv
        do
                _FILE="$(basename $_LINE)"
                _CURRDATE=${_FILE:19:8}
                rm    -rf       $_CURRDATE
                mkdir -p        $_CURRDATE
                cp       $_LINE $_CURRDATE
 
                if [[ "$_CURRDATE" = "$_LASTDATE" ]]; then
                        spinner
                else
                        printf "${SYMBOL_PASS}\n${_CURRDATE}: "
                fi
 
                _LASTDATE=$_CURRDATE
        done
        printf "\n"
fi
#!/bin/bash
 
COMMAND="${1^^}"
 
SYMBOL_PASS="$(printf '\e[0;32m\xe2\x9c\x94\e[0m')"
SPINNER_STATE='\|/-'
 
spinner()
{
        local _lastpos=$((${#SPINNER_STATE}-1))
        SPINNER_STATE="${SPINNER_STATE:$_lastpos:1}${SPINNER_STATE:0:$_lastpos}"
 
        printf "
}
 
#---------------------------------------------------------------------------------------------------
#
#---------------------------------------------------------------------------------------------------
if [[ "$COMMAND" = "STEP1" ]]; then
        printf "
        _LASTDATE=
        for _LINE in *.csv
        do
                _FILE="$(basename $_LINE)"
                _CURRDATE=${_FILE:19:8}
                rm    -rf       $_CURRDATE
                mkdir -p        $_CURRDATE
                cp       $_LINE $_CURRDATE
 
                if [[ "$_CURRDATE" = "$_LASTDATE" ]]; then
                        spinner
                else
                        printf "${SYMBOL_PASS}\n${_CURRDATE}: "
                fi
 
                _LASTDATE=$_CURRDATE
        done
        printf "\n"
fi

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