pub const FM_DEVIMINT_STATIC_DATA_DIR_ENV: &str = "FM_DEVIMINT_STATIC_DATA_DIR";Expand description
Devimint’s “data dir” (think /usr/devimint/).
“Static” because we use “data dir” for the directory devimint puts all the
runtime state in, which is typically a per-invocation temporary directory.
Can be set during cargo build to force the default one, then available in
Rust code during building, and also checked at runtime to allow
overwriting.