Quickly create and open temporary Go modules for experimentation.

go-playground.sh

#!/usr/bin/env bash

# Usage:
#   ./go-playground.sh [module-name]
#
# Examples:
#   ./go-playground.sh
#   ./go-playground.sh my-test
#
# Creates a temporary Go module in $TMPDIR/go-playground/<module-name>
# and opens main.go in the default editor.

set -e

modname="${1:-unnamed}"
ttdir="${TMPDIR:-/tmp}/go-playground/${modname}"

if [[ -e "$ttdir" ]]; then
    cd "$ttdir"
else
    mkdir -p "$ttdir"
    cd "$ttdir"
    go mod init "$modname"
fi

"${EDITOR:-vim}" main.go