. file [ arg ... ]
Read commands from file and execute them in the current shell
environment.
If file does not contain a slash, or if PATH_DIRS is set, the
shell looks in the components of $path to find the directory
containing file. Files in the current directory are not read
unless `.' appears somewhere in $path. If a file named `file.zwc'
is found, is newer than file, and is the compiled form (created
with the zcompile builtin) of file, then commands are read from
that file instead of file.
If any arguments arg are given, they become the positional
parameters; the old positional parameters are restored when the
file is done executing. However, if no arguments are given, the
positional parameters remain those of the calling context, and no
restoring is done.
If file was not found the return status is 127; if file was found
but contained a syntax error the return status is 126; else the
return status is the exit status of the last command executed.
Mini Shell