On 25Mar2020 05:31, Angelo Moreschini <mrangelo.fedora@xxxxxxxxx> wrote:
I couldn't understand the reason for the double registration of the path :
(surly the script was executed twice).
Or the same incantation is elsewhere in your setup, thus doing it twice.
Eg .profile or something.
I write (for the benefit of others) the solution I found:
(I modified the script with a condition).
---------
newpath="/opt/netbeans/java/maven/bin"
No quotes needed here.
if [[ "$PATH" != *"$newpath"* ]]; then
This is a little fuzzy. It is conceivable (though in this case unlikely)
that your $PATH contains something like:
/something/opt/netbeans/java/maven/bin
or:
/opt/netbeans/java/maven/bin-other-thing
and your match would mistakenly thing the path:
/opt/netbeans/java/maven/bin
was present. Personally I am old school and do this with a case
statement (though the same can be applied with [[....]]):
case ":$PATH:" in
*":$newpath:"*)
# already present
;;
*) PATH=$PATH:$newpath
export PATH
;;
esac
The important thing here isn't case vs [[....]], it is the ":"
bracketing of $PATH and $newpath to avoid accidentally matching a longer
string which just happens to contain $newpath.
PATH=$PATH:/opt/netbeans/java/maven/bin
Use $newpath here, avoids writing the maven path twice:
PATH=$PATH:$newpath
export PATH
fi
But the incantation is being run twice. How that is happening seems
worth investigating when you're idle and bored.
Elsewhere in the thread someone mentioned some presupplied shell function for
adding to $PATH which contains essentially the logic in your if-statement.
Cheers,
Cameron Simpson <cs@xxxxxxxxxx>
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