Environment variable standards

It's helpful to define environment variables for use in your shell (see environ(7)). The Johnny.Decimal system defines the following standards. Use them and your tools will work with mine.

Namespace

Every variable starts JD_.

export JD_VAR=something

Hierarchy

For multiple systems, the system identifier comes before the item.

# JD_<SYS identifier>_<item>

# āœ…
export JD_D25_ROOT="/some/path"

# āŒ
export JD_ROOT_D25="/some/path"

Variables

Filesystem root

# Single system
export JD_PATH="/Users/john/Documents"

# Multiple systems
export JD_D25_PATH="/Users/john/Documents/D25"

JDex root

If your JDex is accessible by your filesystem (e.g. an Obsidian vault) define its root.1

# Single system
export JD_JDEX="/Users/john/Documents/JDex"

# Multiple systems
export JD_D25_JDEX="/Users/john/Documents/D25/JDex"

Footnotes

  1. Noting that your Obsidian vault should live at 00.00 in your Johnny.Decimal system. That makes the path long so I simplified the example code. See blog/0182 for a deep-dive. ā†©