.Dd June 5, 2022
.Dt TIX-VARS 8
.Os
.Sh NAME
.Nm tix-vars
.Nd evaluate variables in port files
.Sh SYNOPSIS
.Nm
.Op Fl t
.Op Fl d Ar default
.Ar file
.Op Ar variable ...
.Sh DESCRIPTION
.Nm
evaluates the variables in the
.Xr port 5
named by
.Ar file
or the standard input if
.Ar file
is
.Sq - .
If any
.Ar variables
are requested then their raw values are written as lines.
Otherwise all the variables are written in a normalized form as lines with an
equals sign
.Sq =
separating the variable name and the raw value.
.Pp
The options are as follows:
.Bl -tag -width "12345678"
.It Fl d Ar default
Use the
.Ar default
value instead if the variable is unset.
.It Fl t
Test quietly whether the file is syntactically correct and whether the variables
are set without writing their contents.
.El
.Sh EXIT STATUS
.Nm
will exit 0 on success,
exit 1 on a syntax error or if the requested variable is unset,
and exit 2 otherwise.
.Sh SEE ALSO
.Xr port 5 ,
.Xr tix-build 8 ,
.Xr tix-port 8
.Sh HISTORY
.Nm
originally appeared in Sortix 1.1.