lookPath file

lookPath searches for an executable named file in the directories named by the PATH environment variable. If file contains a slash, it is tried directly and the PATH is not consulted. The result may be an absolute path or a path relative to the current directory. If file is not found, lookPath returns an empty string.

lookPath is not hermetic: its return value depends on the state of the environment and the filesystem at the moment the template is executed. Exercise caution when using it in your templates.

The return value of the first successful call to lookPath is cached, and future calls to lookPath for the same file will return this path.

Example

{{ if lookPath "diff-so-fancy" }}
# diff-so-fancy is in $PATH
{{ end }}