Re: how is envPaths built?

[Marco Filho via Tech-talk <tech-talk at aps.anl.gov>]

For some reason my emails aren't going to tech-talk... Re-sending it here

You kinda got me curious to this too.
I found this script segment which seems to be creating envPaths in epics-base/bin/linux-x86_64/convertRelease.pl:

#
# Generate envPaths file with epicsEnvSet commands for iocsh IOCs.
# Include parentheses anyway in case CEXP users want to use this.
#
sub envPaths {
    my @includes = grep !m/^ (RULES | TEMPLATE_TOP) $/x, @apps;

    unlink($outfile);
    open(OUT,">$outfile") or die "$! creating $outfile";

    my $ioc = $cwd;
    $ioc =~ s/^.*\///;  # iocname is last component of directory name

    print OUT "epicsEnvSet(\"IOC\",\"$ioc\")\n";

    foreach my $app (@includes) {
        my $iocpath = my $path = $macros{$app};
        $iocpath =~ s/^$root/$iocroot/o if ($opt_t);
        $iocpath =~ s/([\\"])/\\$1/g; # escape back-slashes and double-quotes
        print OUT "epicsEnvSet(\"$app\",\"$iocpath\")\n" if (-d $path);
    }
    close OUT;
}

I don't know perl but it seems it gets the name from the directory and the directory itself is created from another mechanism from makeBaseApp?
I tried changing the directory name and recompiling and it really changes the IOC variable name in envPaths. I'm not sure where is the part of makeBaseApp that creates the directory though.

---

From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of William Kirstaedter via Tech-talk <tech-talk at aps.anl.gov>
Sent: 28 August 2024 10:38
To: tech-talk at aps.anl.gov
Subject: how is envPaths built?

 

Hello,

I'd like to know how the envPaths file in the iocBoot Directory is built.

I tried to load the IOC's main dbd file by using the $(IOC) variable
from envPaths, but noticed that it always will contain an "ioc" Prefix
to the actual IOC name, while the dbd file is called just like the IOC name.

for example, if you create a new empty IOC by using "makeBaseApp.pl -t
ioc test" and "makeBaseApp.pl -i -t ioc test":

you get a Makefile in $(TOP)/testApp/src/ that builds a test.dbd

while in iocBoot, envPaths with always have the $(IOC) variable set to
"ioctest".

Just curious,

--
William Kirstaedter
PP&B Computer Support Group
Fritz-Haber-Institut Berlin