I've got a text file with certain installation instructions, and I know I can grep for a unique occurrence in the file. For example, the text file has something like:
MYDIR=`find /home/user -name somedir` export PERL5LIB=$PERL5LIB:$MYDIR
In bash, how can I execute the lines after a grep in the file? Something like:
execute result from "grep somedir INSTALLFILE" execute result from "grep 'export PERL5LIB' INSTALLFILE"
Assumptions:
You could redirect your commands to a temp file and execute that:
tmp=$(mktemp)
{
grep somedir INSTALLFILE
grep 'export PERL5LIB' INSTALLFILE
} > "$tmp"
. "$tmp"
Or you could evaluate the results
eval "$(grep somedir INSTALLFILE)"
eval "$(grep 'export PERL5LIB' INSTALLFILE)"
Updating an old answer. What I would do today is use a process substitution:
source <(
grep somedir INSTALLFILE
grep 'export PERL5LIB' INSTALLFILE
)
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