vim-env-syntax
This plugin provides Vim syntax highlighting for .env files.
Usually, .env files are detected as filetype sh, because they look like
– and often are – valid shell code. However, there is a file type definition
of .env files that is much simpler. Tools following this definition, such as
kubectl, do not parse .env files like a shell would.¹ Instead, lines are
very simply split at the first equal sign to determine variable names and
values. No parsing of the values is performed, leading to, e.g., quote
characters becoming part of the literal variable values.
The env.vim syntax definition only highlights relevant syntax for this
use-case. Besides variable names and the first equal sign, it highlights
potential pitfalls (see the included examples.env file). It does not
highlight any other syntax that would otherwise be significant to a shell.
¹⁾ Cf. Kubernetes docs.