tl; dr script=$(readlink -e -- "${BASH_SOURCE}")
(para bash obviamente)
$BASH_SOURCE
casos de teste
dado arquivo /tmp/source1.sh
echo '$BASH_SOURCE '"(${BASH_SOURCE})"
echo 'readlink -e $BASH_SOURCE'\
"($(readlink -e -- "${BASH_SOURCE}"))"
source
o arquivo de diferentes maneiras
source
de /tmp
$> cd /tmp
$> source source1.sh
$BASH_SOURCE (source1.sh)
readlink -e $BASH_SOURCE (/tmp/source1.sh)
$> source ./source1.sh
$BASH_SOURCE (./source1.sh)
readlink -e $BASH_SOURCE (/tmp/source1.sh)
$> source /tmp/source1.sh
$BASH_SOURCE (/tmp/source1.sh)
readlink -e $BASH_SOURCE (/tmp/source1.sh)
source
de /
cd /
$> source /tmp/source1.sh
$0 (bash)
$BASH_SOURCE (/tmp/source1.sh)
readlink -e $BASH_SOURCE (/tmp/source1.sh)
source
de diferentes caminhos relativos /tmp/a
e /var
$> cd /tmp/a
$> source ../source1.sh
$BASH_SOURCE (../source1.sh)
readlink -e $BASH_SOURCE (/tmp/source1.sh)
$> cd /var
$> source ../tmp/source1.sh
$BASH_SOURCE (../tmp/source1.sh)
readlink -e $BASH_SOURCE (/tmp/source1.sh)
em relação a $0
em todos os casos, se o script tiver o comando adicionado
echo '$0 '"(${0})"
então source
o script sempre foi impresso
$0 (bash)
no entanto , se o script foi executado , por exemplo
$> bash /tmp/source1.sh
então $0
seria o valor da string /tmp/source1.sh
.
$0 (/tmp/source1.sh)
$BASH_SOURCE (/tmp/source1.sh)
readlink -e $BASH_SOURCE (/tmp/source1.sh)