PROJECT_LANG_1.singularity

Bootstrap: library
From: ubuntu:18.04
Stage: build
# Start of script

# Notes
# I don't know how to make strings in Singularity, so comments will do for now
# I know that Singularity files don't have an extension, that is being done here for reference purposes.

# Project language file 1
# For: seanpm2001/Learn-Singularity
# About:
# I decided to make Singularity the main project language file for this project (Seanpm2001/Learn-Singularity) as Singularity is the language this project is dedicated to, because this project is about learning the Singularity programming language. It only makes sense to Singularity the official language for this project. It is getting its own project language file, starting here.

# Now for a Singularity build file:

# https://www.sylabs.io/guides/3.2/user-guide/definition_files.html

%setup
    touch /file1
    touch ${SINGULARITY_ROOTFS}/file2

%files
    /file1
    /file1 /opt

%environment
    export LISTEN_PORT=12345
    export LC_ALL=C

%post
    apt-get update && apt-get install -y netcat
    NOW=`date`
    echo "export NOW=\"${NOW}\"" >> $SINGULARITY_ENVIRONMENT

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

%startscript
    nc -lp $LISTEN_PORT

%test
    grep -q NAME="Ubuntu" /etc/os-release
    if [ $? -eq 0 ]; then
        echo "Container base is Ubuntu as expected."
    else
        echo "Container base is not Ubuntu."
    fi

%labels
    Author d@sylabs.io
    Version v0.0.1

%help
    This is a demo container used to illustrate a def file that uses all
    supported sections.

# Taken and modified from: https://github.com/onnovalkering/vscode-singularity/blob/master/test/Singularity

# File info
# File type: Singularity source file (*Singularity *Apptainer)
# File version: 1 (2022, Monday, August 29th at 4:13 pm PST)
# Line count (including blank lines and compiler line): 68

# End of script