Instructions on setting up environment-modules need update for macOS

[TomasPuverle]

I noticed that the following example in "Getting started" no longer appears to work:

TMP=`tempfile`
echo >$TMP
MODULE_HOME=`spack location --install-dir environment-modules`
MODULE_VERSION=`ls -1 $MODULE_HOME/Modules | head -1`
${MODULE_HOME}/Modules/${MODULE_VERSION}/bin/add.modules <$TMP
cp .bashrc $TMP
echo "MODULE_VERSION=${MODULE_VERSION}" > .bashrc
cat $TMP >>.bashrc

I think the problem is (at least) two fold:

1. I don't think tempfile is universaly supported
2. I installed environment-modules using spack and the MODULE_VERSION variable just expands to 'bin', leading to a path of '..../Modules/bin/bin/add.modules', which doesn't exist.

Thank you,

Tom

[adamjstewart]

I don't think tempfile is universaly supported

You're right. tempfile doesn't exist on my macOS or on CentOS 6. From the tempfile manpage: "tempfile is deprecated; you should use mktemp(1) instead."

[hartzell]

At some point in my past I cargo-culted a bit of code to work around platform variations in how mktemp behaved. This is most likely where I cut-n-pasted it from (didn't write it down at the time but it's a perfect match...).

# platform agnostic mktemp call...
tools=$(mktemp -d 2>/dev/null || mktemp -d -t '/tmp/foo-bar.XXXXX')