singularity_template.def

BootStrap: docker
From: fedora:35

### Change <YOU>/MyPackage.jl to the appropriate settings for you BEFORE you run this.

%post
    dnf install -y wget openssh-clients git
    
    ## We'll install in /opt
    cd /opt
    
    ## Get your packages cloned (with a git repo, not zip)
    git clone https://github.com/<YOU>/MyPackage.jl
    
    ## Get latest Julia
    wget https://julialang-s3.julialang.org/bin/linux/x64/1.7/julia-1.7.1-linux-x86_64.tar.gz
    mkdir -p /opt/julia
    mv julia-1.7.1-linux-x86_64.tar.gz /opt/julia
    cd /opt/julia
    tar -xf julia-1.7.1-linux-x86_64.tar.gz
    
    ## Make sure PATH is set correctly 
    export PATH=/opt/julia/julia-1.7.1/bin:$PATH
    
    ## Isolate Julia to use within container directories, do not leak to ~/.julia if we can avoid it
    mkdir -p /opt/juliadepot
    export JULIA_DEPOT_PATH=/opt/juliadepot
    
    ## Configure our own package
    cd /opt/MyPackage.jl
    
    # Install (note that --project=X is the same as Pkg.activate(X))
    julia --project=/opt/MyPackage.jl -e 'using Pkg; Pkg.update(); Pkg.instantiate()'
    # Force precompile
    julia --project=/opt/MyPackage.jl -e 'using MyPackage'
    # Not needed
    julia --project=/opt/MyPackage.jl -e 'using Pkg; Pkg.build("MyPackage")'
    # Make sure what we build still works, if the tests fail, the build will fail.
    julia --project=/opt/MyPackage.jl -e 'using Pkg; Pkg.test("MyPackage")'
    
    ## Interactive Julia will write to logs, but we don't want
    ## the container to be writable, so link it to tmpfs on host.
    rm -rf /opt/juliadepot/logs
    ln -s /dev/shm/ /opt/juliadepot/logs
    
    # Get rid of the packages not needed for runtime
    dnf remove -y wget openssh-clients git

%environment
    export LC_ALL=C
    export PATH=/opt/julia/julia-1.7.1/bin:$PATH
    export JULIA_DEPOT_PATH=/opt/juliadepot

%runscript
    echo "Container was created $NOW"
    echo "Arguments received: $*"
    echo pwd
    exec echo "$@"

%labels
    Author you@you.ca
    Version v0.4.2

%help
    singularity exec image.sif julia --project=/opt/MyPackage.jl